diff --git a/test/diagrams/scanned_hard/diagrams_10.txt b/test/diagrams/scanned_hard/diagrams_10.txt
new file mode 100644
index 0000000000000000000000000000000000000000..2324499aa2d0100a98e55071dfff773205988c85
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_10.txt
@@ -0,0 +1,10 @@
+<Broadband Provisioning, suspends, Speed Throttling>
+<Contract Termination, connectedTo, Antenna Maintenance>
+<Fraudulent Call Blocking, connectedTo, VoIP Service>
+<IoT Device Connection, licenses, Broadband Provisioning>
+<IoT Device Connection, records, Antenna Maintenance>
+<Network Activation, connectedTo, Roaming Activation>
+<Roaming Activation, activates, Fraudulent Call Blocking>
+<Roaming Activation, registers, Network Activation>
+<Speed Throttling, detects, Contract Termination>
+<VoIP Service, blocks, IoT Device Connection>
diff --git a/test/diagrams/scanned_hard/diagrams_107.dot b/test/diagrams/scanned_hard/diagrams_107.dot
new file mode 100644
index 0000000000000000000000000000000000000000..ae8ea720e0192e7fa50b3d94cbfc055fcaaeabcb
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_107.dot
@@ -0,0 +1,21 @@
+digraph {
+	rankdir=RL
+	N0 [label="Emergency Preparedness for Earthquakes" color="#A188DB" fillcolor="#DED7F0" shape=multipledocuments style=filled]
+	N1 [label="Microseismicity Study" color="#A188DB" fillcolor="#DED7F0" shape=parallelogram style=filled]
+	N2 [label="Induced Seismicity Monitoring" color="#FFE470" fillcolor="#FFFAE0" shape=box style=filled]
+	N3 [label="Seismic Risk Mitigation" color="#A188DB" fillcolor="#DED7F0" shape=hexagon style=filled]
+	N4 [label="Ground Motion Prediction" color="#AB47BC" fillcolor="#F3E5F5" shape=vnode_shape style=filled]
+	N5 [label="P_Wave or S_Wave Distinction" color="#FFE470" fillcolor="#FFFAE0" shape=diamond style=filled]
+	N6 [label="Strong Motion Instrumentation" color="#FFE470" fillcolor="#FFFAE0" shape=hexagon style=filled]
+	N7 [label="Tsunami Warning Systems" color="#AB47BC" fillcolor="#F3E5F5" shape=action style=filled]
+	N8 [label="Seismic Tomography" color="#A188DB" fillcolor="#DED7F0" shape=parallelogram style=filled]
+	N0 -> N1 [color="#A188DB" penwidth=1.5 style=dashed label="interprets" dir=forward]
+	N1 -> N2 [color="#FFE470" penwidth=1.5 style=dashed label="responds" dir=forward]
+	N2 -> N3 [color="#AB47BC" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#AB47BC" penwidth=1.5 style=solid label="reports" dir=forward]
+	N4 -> N5 [color="#A188DB" penwidth=1.5 style=solid label="alerts" dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=solid label="fault_lines" dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N0 -> N7 [color="#AB47BC" penwidth=1.5 style=solid label="engineers" dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_107.txt b/test/diagrams/scanned_hard/diagrams_107.txt
new file mode 100644
index 0000000000000000000000000000000000000000..a8776c094cb264b52f57cb02c7320ae88d089121
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_107.txt
@@ -0,0 +1,9 @@
+<Emergency Preparedness for Earthquakes, engineers, Tsunami Warning Systems>
+<Emergency Preparedness for Earthquakes, interprets, Microseismicity Study>
+<Ground Motion Prediction, alerts, P_Wave or S_Wave Distinction>
+<Induced Seismicity Monitoring, connectedTo, Seismic Risk Mitigation>
+<Microseismicity Study, responds, Induced Seismicity Monitoring>
+<P_Wave or S_Wave Distinction, connectedTo, Strong Motion Instrumentation>
+<Seismic Risk Mitigation, reports, Ground Motion Prediction>
+<Strong Motion Instrumentation, fault_lines, Tsunami Warning Systems>
+<Tsunami Warning Systems, connectedTo, Seismic Tomography>
diff --git a/test/diagrams/scanned_hard/diagrams_11.dot b/test/diagrams/scanned_hard/diagrams_11.dot
new file mode 100644
index 0000000000000000000000000000000000000000..ad5c3e6cadbffe5602890cf67ce13a4d5d2a3900
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_11.dot
@@ -0,0 +1,19 @@
+digraph {
+	rankdir=LR
+	N0 [label="Organic Certification" color="#FFDA4E" fillcolor="#FFE88D" shape=document style=filled]
+	N1 [label="Farm Maintenance" color="#64B5F6" fillcolor="#E3F2FD" shape=action style=filled]
+	N2 [label="Barn Cleaning" color="#388E3C" fillcolor="#C8E6C9" shape=hexagon style=filled]
+	N3 [label="Soil Testing" color="#FFDA4E" fillcolor="#FFE88D" shape=inputoutput style=filled]
+	N4 [label="Hydroponic System Management" color="#64B5F6" fillcolor="#E3F2FD" shape=document style=filled]
+	N5 [label="Equipment Repair" color="#FFDA4E" fillcolor="#FFE88D" shape=parallelogram style=filled]
+	N6 [label="Automated Milking" color="#64B5F6" fillcolor="#E3F2FD" shape=ellipse style=filled]
+	N7 [label="Harvesting" color="#388E3C" fillcolor="#C8E6C9" shape=rect style=filled]
+	N0 -> N1 [color="#FFDA4E" penwidth=1.5 style=dashed label="waters" dir=forward]
+	N1 -> N2 [color="#64B5F6" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#64B5F6" penwidth=1.5 style=solid label="tests" dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#64B5F6" penwidth=1.5 style=dashed label="complies" dir=forward]
+	N5 -> N6 [color="#388E3C" penwidth=1.5 style=dashed label="repairs" dir=forward]
+	N6 -> N7 [color="#388E3C" penwidth=1.5 style=dashed label="feeds" dir=forward]
+	N2 -> N5 [color="#64B5F6" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_111.txt b/test/diagrams/scanned_hard/diagrams_111.txt
new file mode 100644
index 0000000000000000000000000000000000000000..5b09674c147a7310eef2688198f0051934d7f0fa
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_111.txt
@@ -0,0 +1,8 @@
+<Asset Optimization, decision_supports, Automotive Digital Twins>
+<Automotive Digital Twins, connectedTo, Cyber_Physical Systems>
+<Cyber_Physical Systems, connectedTo, Historical Data Analysis>
+<Enterprise Asset Management Integration, designs, Scalability of Models>
+<Enterprise Asset Management Integration, optimizes, Simulation Platform Development>
+<Performance Monitoring, deploys, Asset Optimization>
+<Scalability of Models, connectedTo, Performance Monitoring>
+<Simulation Platform Development, connectedTo, Enterprise Asset Management Integration>
diff --git a/test/diagrams/scanned_hard/diagrams_114.dot b/test/diagrams/scanned_hard/diagrams_114.dot
new file mode 100644
index 0000000000000000000000000000000000000000..089731f64f44f3fc53f617e97e3b4399e5f9c24b
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_114.dot
@@ -0,0 +1,24 @@
+digraph {
+	rankdir=TB
+	N0 [label="Customer Relationship Management" color="#DCE775" fillcolor="#F9FBE7" shape=ellipse style=filled]
+	N1 [label="Troubleshooting and Support" color="#AABEC6" fillcolor="#E0E6E9" shape=diamond style=filled]
+	N2 [label="Asset Management" color="#607D8B" fillcolor="#CFD8DC" shape=vnode_shape style=filled]
+	N3 [label="Manufacturing Operations" color="#607D8B" fillcolor="#CFD8DC" shape=multipledocuments style=filled]
+	N4 [label="System Upgrade" color="#DCE775" fillcolor="#F9FBE7" shape=preparation style=filled]
+	N5 [label="Hybrid ERP Models" color="#DCE775" fillcolor="#F9FBE7" shape=ellipse style=filled]
+	N6 [label="Supply Chain Management" color="#607D8B" fillcolor="#CFD8DC" shape=inputoutput style=filled]
+	N7 [label="Business Process Re_engineering" color="#AABEC6" fillcolor="#E0E6E9" shape=rectangle style=filled]
+	N8 [label="System Configuration" color="#AABEC6" fillcolor="#E0E6E9" shape=action style=filled]
+	N9 [label="AI or ML in ERP" color="#607D8B" fillcolor="#CFD8DC" shape=predefinedprocess style=filled]
+	N0 -> N1 [color="#000000" penwidth=1.5 style=solid label="implements" dir=forward]
+	N1 -> N2 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#DCE775" penwidth=1.5 style=solid label="optimizes" dir=forward]
+	N3 -> N4 [color="#AABEC6" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=solid label="secures" dir=forward]
+	N5 -> N6 [color="#607D8B" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#AABEC6" penwidth=1.5 style=solid label="inventories_manages" dir=forward]
+	N7 -> N8 [color="#607D8B" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#607D8B" penwidth=1.5 style=dashed label="sales_manages" dir=forward]
+	N4 -> N1 [color="#607D8B" penwidth=1.5 style=dashed label="procurements_handles" dir=forward]
+	N2 -> N8 [color="#607D8B" penwidth=1.5 style=solid label="cloud_deploys" dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_115.dot b/test/diagrams/scanned_hard/diagrams_115.dot
new file mode 100644
index 0000000000000000000000000000000000000000..955a51c38a348cb5822b6a09185e355bb8de4b69
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_115.dot
@@ -0,0 +1,21 @@
+digraph {
+	rankdir=RL
+	N0 [label="Sensor Deployment" color="#FFB2A5" fillcolor="#FFDCD6" shape=database style=filled]
+	N1 [label="Farm Labor Management Software" color="#8C9EFF" fillcolor="#D3D7EB" shape=rectangle style=filled]
+	N2 [label="Digital Soil Mapping" color="#FFB2A5" fillcolor="#FFDCD6" shape=multipledocuments style=filled]
+	N3 [label="Satellite Imaging" color="#00BCD4" fillcolor="#E0F7FA" shape=rect style=filled]
+	N4 [label="Farm Robotics" color="#8C9EFF" fillcolor="#D3D7EB" shape=parallelogram style=filled]
+	N5 [label="Big Data Analytics for Farms" color="#FFB2A5" fillcolor="#FFDCD6" shape=box style=filled]
+	N6 [label="Farm Management Dashboards" color="#8C9EFF" fillcolor="#D3D7EB" shape=predefinedprocess style=filled]
+	N7 [label="Geographic Information Systems for Farms" color="#00BCD4" fillcolor="#E0F7FA" shape=hexagon style=filled]
+	N8 [label="Farm Management Software" color="#8C9EFF" fillcolor="#D3D7EB" shape=inputoutput style=filled]
+	N0 -> N1 [color="#8C9EFF" penwidth=1.5 style=dashed label="analyzes_data" dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=solid label="visualizes" dir=forward]
+	N2 -> N3 [color="#00BCD4" penwidth=1.5 style=solid label="predicts" dir=forward]
+	N3 -> N4 [color="#00BCD4" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#00BCD4" penwidth=1.5 style=dashed label="satellites_leverages" dir=forward]
+	N5 -> N6 [color="#00BCD4" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=solid label="blockchain_traces" dir=forward]
+	N7 -> N8 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	N2 -> N8 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_117.txt b/test/diagrams/scanned_hard/diagrams_117.txt
new file mode 100644
index 0000000000000000000000000000000000000000..1f5ea52b449511f656c7f6934b39024f7881faad
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_117.txt
@@ -0,0 +1,8 @@
+<Aging Brain Research, applies, Transcranial Magnetic Stimulation>
+<Behavioral Neuroscience, privacy_protects, Aging Brain Research>
+<Brain Imaging, connectedTo, Deep Brain Stimulation>
+<Brain_Computer Interface, connectedTo, Drug Development for Brain Disorders>
+<Brain_Computer Interface, connectedTo, Stem Cell Research>
+<Deep Brain Stimulation, connectedTo, Brain_Computer Interface>
+<Drug Development for Brain Disorders, diseases_diagnoses, Behavioral Neuroscience>
+<Transcranial Magnetic Stimulation, treats_disorders, Stem Cell Research>
diff --git a/test/diagrams/scanned_hard/diagrams_119.dot b/test/diagrams/scanned_hard/diagrams_119.dot
new file mode 100644
index 0000000000000000000000000000000000000000..0eaf06ce97f72af3ca326a0d5388531da12bda20
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_119.dot
@@ -0,0 +1,19 @@
+digraph {
+	rankdir=LR
+	N0 [label="Directed Evolution" color="#FFCC7A" fillcolor="#FFF6D9" shape=hexagon style=filled]
+	N1 [label="Sustainable Chemical Production" color="#FFCC7A" fillcolor="#FFF6D9" shape=rectangle style=filled]
+	N2 [label="Protein Design" color="#FF5722" fillcolor="#FFCCBC" shape=document style=filled]
+	N3 [label="Directed Evolution Automation" color="#FFCC7A" fillcolor="#FFF6D9" shape=box style=filled]
+	N4 [label="DNA Synthesis" color="#CDDC39" fillcolor="#E6EE9C" shape=parallelogram style=filled]
+	N5 [label="DNA Storage Technologies" color="#FF5722" fillcolor="#FFCCBC" shape=inputoutput style=filled]
+	N6 [label="Drug Delivery Systems" color="#FFCC7A" fillcolor="#FFF6D9" shape=rectangle style=filled]
+	N7 [label="Biosafety Level Management" color="#FFCC7A" fillcolor="#FFF6D9" shape=box style=filled]
+	N0 -> N1 [color="#FFCC7A" penwidth=1.5 style=dashed label="designs" dir=forward]
+	N1 -> N2 [color="#FF5722" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=solid label="manipulates" dir=forward]
+	N3 -> N4 [color="#FF5722" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#CDDC39" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=dashed label="regulates" dir=forward]
+	N6 -> N7 [color="#FFCC7A" penwidth=1.5 style=dashed label="complies" dir=forward]
+	N2 -> N5 [color="#CDDC39" penwidth=1.5 style=dashed label="clones" dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_119.txt b/test/diagrams/scanned_hard/diagrams_119.txt
new file mode 100644
index 0000000000000000000000000000000000000000..2586f35c962d88fc1175236bf26227a9e20ef59b
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_119.txt
@@ -0,0 +1,8 @@
+<DNA Storage Technologies, regulates, Drug Delivery Systems>
+<DNA Synthesis, connectedTo, DNA Storage Technologies>
+<Directed Evolution, designs, Sustainable Chemical Production>
+<Directed Evolution Automation, connectedTo, DNA Synthesis>
+<Drug Delivery Systems, complies, Biosafety Level Management>
+<Protein Design, clones, DNA Storage Technologies>
+<Protein Design, manipulates, Directed Evolution Automation>
+<Sustainable Chemical Production, connectedTo, Protein Design>
diff --git a/test/diagrams/scanned_hard/diagrams_120.dot b/test/diagrams/scanned_hard/diagrams_120.dot
new file mode 100644
index 0000000000000000000000000000000000000000..8c29fe07da44db933435f3d6c5108d9b941e9df4
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_120.dot
@@ -0,0 +1,26 @@
+digraph {
+	rankdir=BT
+	N0 [label="Simulations for Learning" color="#D3EB9F" fillcolor="#F8FDD3" shape=parallelogram style=filled]
+	N1 [label="Educational Robotics" color="#D3EB9F" fillcolor="#F8FDD3" shape=ellipse style=filled]
+	N2 [label="EdTech Hardware Solutions" color="#E91E63" fillcolor="#FCE4EC" shape=database style=filled]
+	N3 [label="Virtual Classrooms" color="#E91E63" fillcolor="#FCE4EC" shape=parallelogram style=filled]
+	N4 [label="Learning Analytics Dashboards" color="#DCE775" fillcolor="#FCFCE7" shape=rectangle style=filled]
+	N5 [label="Personalized Learning Paths" color="#E91E63" fillcolor="#FCE4EC" shape=rectangle style=filled]
+	N6 [label="Learning Management System Development" color="#E91E63" fillcolor="#FCE4EC" shape=predefinedprocess style=filled]
+	N7 [label="Blockchain for Educational Credentials" color="#DCE775" fillcolor="#FCFCE7" shape=predefinedprocess style=filled]
+	N8 [label="E_Learning Platform Design" color="#D3EB9F" fillcolor="#F8FDD3" shape=ellipse style=filled]
+	N9 [label="Machine Learning for Learning Analytics" color="#DCE775" fillcolor="#FCFCE7" shape=box style=filled]
+	N10 [label="Teacher Training Platforms" color="#D3EB9F" fillcolor="#F8FDD3" shape=rectangle style=filled]
+	N0 -> N1 [color="#DCE775" penwidth=1.5 style=dashed label="tracks" dir=forward]
+	N1 -> N2 [color="#D3EB9F" penwidth=1.5 style=solid label="platforms_builds" dir=forward]
+	N2 -> N3 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=solid label="accessibility_ensures" dir=forward]
+	N6 -> N7 [color="#DCE775" penwidth=1.5 style=solid label="complies" dir=forward]
+	N7 -> N8 [color="#D3EB9F" penwidth=1.5 style=solid label="administrators_assists" dir=forward]
+	N8 -> N9 [color="#D3EB9F" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#000000" penwidth=1.5 style=dashed label="manages" dir=forward]
+	N3 -> N1 [color="#E91E63" penwidth=1.5 style=solid dir=forward]
+	N5 -> N7 [color="#D3EB9F" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_120.txt b/test/diagrams/scanned_hard/diagrams_120.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ad5e1dc24c19c0e439e859e84d049684e3404f79
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_120.txt
@@ -0,0 +1,12 @@
+<Blockchain for Educational Credentials, administrators_assists, E_Learning Platform Design>
+<E_Learning Platform Design, connectedTo, Machine Learning for Learning Analytics>
+<EdTech Hardware Solutions, connectedTo, Virtual Classrooms>
+<Educational Robotics, platforms_builds, EdTech Hardware Solutions>
+<Learning Analytics Dashboards, connectedTo, Personalized Learning Paths>
+<Learning Management System Development, complies, Blockchain for Educational Credentials>
+<Machine Learning for Learning Analytics, manages, Teacher Training Platforms>
+<Personalized Learning Paths, accessibility_ensures, Learning Management System Development>
+<Personalized Learning Paths, connectedTo, Blockchain for Educational Credentials>
+<Simulations for Learning, tracks, Educational Robotics>
+<Virtual Classrooms, connectedTo, Educational Robotics>
+<Virtual Classrooms, connectedTo, Learning Analytics Dashboards>
diff --git a/test/diagrams/scanned_hard/diagrams_121.dot b/test/diagrams/scanned_hard/diagrams_121.dot
new file mode 100644
index 0000000000000000000000000000000000000000..da868a8a3ce94eb617188ed9472362c25eea77f9
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_121.dot
@@ -0,0 +1,39 @@
+digraph {
+	rankdir=LR
+	N0 [label="Pollution Dispersion Modeling" color="#9FA9E1" fillcolor="#D6D9F0" shape=rect style=filled]
+	N1 [label="Synoptic Chart Analysis" color="#9FA9E1" fillcolor="#D6D9F0" shape=hexagon style=filled]
+	N2 [label="Weather Forecasting" color="#61CAC3" fillcolor="#C2E8E6" shape=preparation style=filled]
+	N3 [label="Severe Weather Warning" color="#61CAC3" fillcolor="#C2E8E6" shape=box style=filled]
+	N4 [label="Storm Tracking" color="#9FA9E1" fillcolor="#D6D9F0" shape=action style=filled]
+	N5 [label="Public Weather Briefing" color="#61CAC3" fillcolor="#C2E8E6" shape=rectangle style=filled]
+	N6 [label="Lightning Detection" color="#D2D2D2" fillcolor="#F0F0F0" shape=predefinedprocess style=filled]
+	S0 [label="" color="#61CAC3" fillcolor="#C2E8E6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#D2D2D2" fillcolor="#F0F0F0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#9FA9E1" fillcolor="#D6D9F0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Nowcasting {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Nowcasting"
+		nest0_0 [label="Atmospheric Sounding" color="#9FA9E1" fillcolor="#D6D9F0" shape=predefinedprocess style=filled]
+		nest0_1 [label="Boundary Layer Study" color="#61CAC3" fillcolor="#C2E8E6" shape=rectangle style=filled]
+	}
+	N0 -> N1 [color="#D2D2D2" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#61CAC3" penwidth=1.5 style=solid label="warns" dir=forward]
+	N2 -> N3 [color="#9FA9E1" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#61CAC3" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#9FA9E1" penwidth=1.5 style=solid label="classifies" dir=forward]
+	nest0_0 -> nest0_1 [color="#D2D2D2" penwidth=1.5 style=dashed dir=forward]
+	N2 -> nest0_0 [color="#61CAC3" penwidth=1.5 style=solid label="simulates" dir=forward]
+	nest0_1 -> N4 [color="#D2D2D2" penwidth=1.5 style=dashed label="integrates" dir=forward]
+	N3 -> S0 [color="#D2D2D2" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N5 [color="#D2D2D2" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N6 [color="#9FA9E1" penwidth=1.5 style=solid dir=forward]
+	N2 -> S1 [color="#D2D2D2" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N6 [color="#D2D2D2" penwidth=1.5 style=solid dir=forward]
+	S1 -> N4 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N5 [color="#D2D2D2" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M0 [color="#D2D2D2" penwidth=1.5 style=solid dir=forward]
+	N1 -> M0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	M0 -> N5 [color="#9FA9E1" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_125.txt b/test/diagrams/scanned_hard/diagrams_125.txt
new file mode 100644
index 0000000000000000000000000000000000000000..4f9ab7672dd309f4f78021a1edce026477bb83f1
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_125.txt
@@ -0,0 +1,18 @@
+<Anaerobic Digestion, connectedTo, Textile Recycling>
+<Anaerobic Digestion, measures, Container Management>
+<Composting, connectedTo, Container Management>
+<Container Management, connectedTo, Anaerobic Digestion>
+<Container Management, connectedTo, Textile Recycling>
+<Container Management, connectedTo, Waste Characterization Study>
+<Leachate Treatment, connectedTo, Composting>
+<Leachate Treatment, connectedTo, Waste Management Policy Development>
+<Leachate Treatment, recycles, Anaerobic Digestion>
+<Organics Collection, collects, Composting>
+<Organics Collection, reports, Textile Recycling>
+<Textile Recycling, sorts, Waste Management Data Analytics>
+<Waste Characterization Study, connectedTo, Industrial Waste Management>
+<Waste Compaction, connectedTo, Container Management>
+<Waste Compaction, connectedTo, Organics Collection>
+<Waste Logistics Optimization, transports, Waste Characterization Study>
+<Waste Management Data Analytics, connectedTo, Leachate Treatment>
+<Waste Management Policy Development, connectedTo, Waste Logistics Optimization>
diff --git a/test/diagrams/scanned_hard/diagrams_129.dot b/test/diagrams/scanned_hard/diagrams_129.dot
new file mode 100644
index 0000000000000000000000000000000000000000..e27d77564fbab80da7d4e34feb78a0d475321017
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_129.dot
@@ -0,0 +1,44 @@
+digraph {
+	rankdir=LR
+	N0 [label="Environmental Flow Assessment" color="#92C79A" fillcolor="#E8F0EA" shape=box style=filled]
+	N1 [label="Billing and Revenue Management" color="#FFE69C" fillcolor="#FFF9D4" shape=document style=filled]
+	N2 [label="Piping Network Repair" color="#607D8B" fillcolor="#CFD8DC" shape=predefinedprocess style=filled]
+	N3 [label="Drinking Water Standards Compliance" color="#92C79A" fillcolor="#E8F0EA" shape=document style=filled]
+	N4 [label="Water Infrastructure Maintenance" color="#607D8B" fillcolor="#CFD8DC" shape=vnode_shape style=filled]
+	N5 [label="Public Awareness Campaigns" color="#607D8B" fillcolor="#CFD8DC" shape=box style=filled]
+	N6 [label="Climate Change Adaptation for Water" color="#92C79A" fillcolor="#E8F0EA" shape=rectangle style=filled]
+	N7 [label="Smart Water Networks" color="#607D8B" fillcolor="#CFD8DC" shape=box style=filled]
+	N8 [label="Water Resource Planning" color="#607D8B" fillcolor="#CFD8DC" shape=inputoutput style=filled]
+	N9 [label="Industrial Water Use Optimization" color="#FFE69C" fillcolor="#FFF9D4" shape=preparation style=filled]
+	N10 [label="Greywater Recycling" color="#607D8B" fillcolor="#CFD8DC" shape=rectangle style=filled]
+	S0 [label="" color="#607D8B" fillcolor="#CFD8DC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#92C79A" fillcolor="#E8F0EA" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Agricultural Water Use Efficiency {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Agricultural Water Use Efficiency"
+		nest0_0 [label="Hydrological Modeling" color="#FFE69C" fillcolor="#FFF9D4" shape=hexagon style=filled]
+		nest0_1 [label="Water Scarcity Mitigation" color="#92C79A" fillcolor="#E8F0EA" shape=hexagon style=filled]
+		nest0_2 [label="Ecosystem Protection" color="#FFE69C" fillcolor="#FFF9D4" shape=multipledocuments style=filled]
+	}
+	N0 -> N1 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#92C79A" penwidth=1.5 style=dashed label="manages" dir=forward]
+	N5 -> N6 [color="#FFE69C" penwidth=1.5 style=dashed label="predicts" dir=forward]
+	N6 -> N7 [color="#607D8B" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#92C79A" penwidth=1.5 style=dashed label="tests" dir=forward]
+	N9 -> N10 [color="#607D8B" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#92C79A" penwidth=1.5 style=solid label="filters" dir=forward]
+	nest0_1 -> nest0_2 [color="#92C79A" penwidth=1.5 style=dashed dir=forward]
+	N3 -> nest0_0 [color="#92C79A" penwidth=1.5 style=dashed dir=forward]
+	nest0_2 -> N1 [color="#607D8B" penwidth=1.5 style=dashed dir=forward]
+	N2 -> S0 [color="#607D8B" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N9 [color="#000000" penwidth=1.5 style=solid label="responds" dir=forward]
+	S0 -> N10 [color="#FFE69C" penwidth=1.5 style=solid label="pumps" dir=forward]
+	N5 -> M0 [color="#000000" penwidth=1.5 style=solid label="measures" dir=forward]
+	N3 -> M0 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	M0 -> N9 [color="#607D8B" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_131.txt b/test/diagrams/scanned_hard/diagrams_131.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6932860809cc7cab5abe7d117432b4034bc94259
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_131.txt
@@ -0,0 +1,13 @@
+<Chemical Recycling, connectedTo, Material Purity Testing>
+<Collection Point Management, connectedTo, Chemical Recycling>
+<Deposit_Return Schemes, connectedTo, End_of_Life Product Management>
+<Deposit_Return Schemes, connectedTo, Plastic Recycling>
+<End_of_Life Product Management, connectedTo, Recycling Facility Optimization>
+<Material Purity Testing, connectedTo, Waste Stream Analysis>
+<Plastic Recycling, minimizes, End_of_Life Product Management>
+<Public Recycling Programs, connectedTo, Waste Stream Analysis>
+<Waste Stream Analysis, audits, Plastic Recycling>
+<Waste Stream Analysis, certifies, Collection Point Management>
+<Waste Stream Analysis, connectedTo, Deposit_Return Schemes>
+<Waste Stream Analysis, connectedTo, End_of_Life Product Management>
+<Waste Stream Analysis, designs, End_of_Life Product Management>
diff --git a/test/diagrams/scanned_hard/diagrams_133.dot b/test/diagrams/scanned_hard/diagrams_133.dot
new file mode 100644
index 0000000000000000000000000000000000000000..9921a235a976d860cf8bc7b2ff69444f32475cbb
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_133.dot
@@ -0,0 +1,36 @@
+digraph {
+	rankdir=RL
+	N0 [label="Sustainable Forest Management" color="#9FA9E1" fillcolor="#D6D9F0" shape=box style=filled]
+	N1 [label="Urban Forestry Management" color="#A188D0" fillcolor="#DACBE3" shape=diamond style=filled]
+	N2 [label="Tree Nursery Management" color="#7E57C2" fillcolor="#EDE7F6" shape=database style=filled]
+	N3 [label="Forestry Policy Development" color="#A188D0" fillcolor="#DACBE3" shape=box style=filled]
+	N4 [label="Wood Product Manufacturing" color="#9FA9E1" fillcolor="#D6D9F0" shape=vnode_shape style=filled]
+	N5 [label="Non_Timber Forest Product Collection" color="#9FA9E1" fillcolor="#D6D9F0" shape=ellipse style=filled]
+	N6 [label="Illegal Logging Prevention" color="#9FA9E1" fillcolor="#D6D9F0" shape=hexagon style=filled]
+	N7 [label="Biomass Production from Forests" color="#7E57C2" fillcolor="#EDE7F6" shape=diamond style=filled]
+	M0 [label="" color="#9FA9E1" fillcolor="#D6D9F0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Forest Carbon Accounting {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Forest Carbon Accounting"
+		nest0_0 [label="Forest Certification" color="#9FA9E1" fillcolor="#D6D9F0" shape=diamond style=filled]
+		nest0_1 [label="Afforestation" color="#9FA9E1" fillcolor="#D6D9F0" shape=inputoutput style=filled]
+		nest0_2 [label="Forest Inventory" color="#7E57C2" fillcolor="#EDE7F6" shape=database style=filled]
+	}
+	N0 -> N1 [color="#A188D0" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#A188D0" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#7E57C2" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#A188D0" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=solid label="assesses" dir=forward]
+	N6 -> N7 [color="#A188D0" penwidth=1.5 style=dashed label="certifies" dir=forward]
+	nest0_0 -> nest0_1 [color="#9FA9E1" penwidth=1.5 style=solid label="protects" dir=forward]
+	nest0_1 -> nest0_2 [color="#9FA9E1" penwidth=1.5 style=solid dir=forward]
+	N3 -> nest0_0 [color="#A188D0" penwidth=1.5 style=dashed label="repairs" dir=forward]
+	nest0_2 -> N2 [color="#9FA9E1" penwidth=1.5 style=solid dir=forward]
+	N1 -> M0 [color="#7E57C2" penwidth=1.5 style=solid dir=forward]
+	N2 -> M0 [color="#9FA9E1" penwidth=1.5 style=dashed label="identifies" dir=forward]
+	M0 -> N4 [color="#9FA9E1" penwidth=1.5 style=dashed dir=forward]
+	N6 -> nest0_1 [color="#7E57C2" penwidth=1.5 style=solid dir=forward]
+	N5 -> nest0_1 [color="#000000" penwidth=1.5 style=dashed label="removes" dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_134.dot b/test/diagrams/scanned_hard/diagrams_134.dot
new file mode 100644
index 0000000000000000000000000000000000000000..7b8fa60ff40a68685ed9e566448e78dd63b58779
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_134.dot
@@ -0,0 +1,44 @@
+digraph {
+	rankdir=RL
+	N0 [label="Public Access Management" color="#7986CB" fillcolor="#E8EAF6" shape=rect style=filled]
+	N1 [label="Illegal Logging Prevention" color="#81C784" fillcolor="#F1F8E9" shape=action style=filled]
+	N2 [label="Watershed Protection" color="#7986CB" fillcolor="#E8EAF6" shape=vnode_shape style=filled]
+	N3 [label="Non_Timber Forest Product Collection" color="#7986CB" fillcolor="#E8EAF6" shape=document style=filled]
+	N4 [label="Wildlife Habitat Management" color="#5C6BC0" fillcolor="#E8EAF6" shape=hexagon style=filled]
+	N5 [label="Forest Road Construction" color="#81C784" fillcolor="#F1F8E9" shape=ellipse style=filled]
+	N6 [label="Drone Surveying for Forests" color="#5C6BC0" fillcolor="#E8EAF6" shape=predefinedprocess style=filled]
+	N7 [label="Afforestation" color="#7986CB" fillcolor="#E8EAF6" shape=action style=filled]
+	N8 [label="Carbon Sequestration Monitoring" color="#5C6BC0" fillcolor="#E8EAF6" shape=ellipse style=filled]
+	N9 [label="Forestry Education" color="#7986CB" fillcolor="#E8EAF6" shape=parallelogram style=filled]
+	N10 [label="Biomass Production from Forests" color="#7986CB" fillcolor="#E8EAF6" shape=predefinedprocess style=filled]
+	N11 [label="Forest Health Monitoring" color="#5C6BC0" fillcolor="#E8EAF6" shape=predefinedprocess style=filled]
+	M0 [label="" color="#81C784" fillcolor="#F1F8E9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#81C784" fillcolor="#F1F8E9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Tree Nursery Management {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Tree Nursery Management"
+		nest0_0 [label="Forest Research" color="#81C784" fillcolor="#F1F8E9" shape=rect style=filled]
+		nest0_1 [label="Biodiversity Conservation in Forests" color="#81C784" fillcolor="#F1F8E9" shape=predefinedprocess style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#5C6BC0" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#81C784" penwidth=1.5 style=solid label="grades" dir=forward]
+	N3 -> N4 [color="#81C784" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#81C784" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#81C784" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=solid label="thins" dir=forward]
+	N7 -> N8 [color="#5C6BC0" penwidth=1.5 style=dashed label="transports" dir=forward]
+	N8 -> N9 [color="#7986CB" penwidth=1.5 style=dashed label="prevents" dir=forward]
+	N9 -> N10 [color="#000000" penwidth=1.5 style=dashed label="identifies" dir=forward]
+	N10 -> N11 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N8 -> nest0_0 [color="#7986CB" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> N11 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N0 -> M0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M0 [color="#7986CB" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N5 [color="#7986CB" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M1 [color="#5C6BC0" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M1 [color="#5C6BC0" penwidth=1.5 style=solid dir=forward]
+	M1 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_144.dot b/test/diagrams/scanned_hard/diagrams_144.dot
new file mode 100644
index 0000000000000000000000000000000000000000..f179d59dba27b30162d23b3f12af4c5162f42cee
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_144.dot
@@ -0,0 +1,51 @@
+digraph {
+	rankdir=BT
+	N0 [label="Recreational Activities Planning" color="#C2B2F0" fillcolor="#EFE6FF" shape=predefinedprocess style=filled]
+	N1 [label="Chronic Disease Management" color="#C0CA33" fillcolor="#F9FBE7" shape=document style=filled]
+	N2 [label="Telehealth for Seniors" color="#388E3C" fillcolor="#F1F8E9" shape=diamond style=filled]
+	N3 [label="Elder Abuse Prevention" color="#C2B2F0" fillcolor="#EFE6FF" shape=hexagon style=filled]
+	N4 [label="Nursing Care" color="#C0CA33" fillcolor="#F9FBE7" shape=ellipse style=filled]
+	N5 [label="Occupational Therapy" color="#C0CA33" fillcolor="#F9FBE7" shape=inputoutput style=filled]
+	N6 [label="Emergency Response System Monitoring" color="#388E3C" fillcolor="#F1F8E9" shape=vnode_shape style=filled]
+	N7 [label="Caregiver Training" color="#388E3C" fillcolor="#F1F8E9" shape=ellipse style=filled]
+	N8 [label="Pain Management" color="#C0CA33" fillcolor="#F9FBE7" shape=diamond style=filled]
+	N9 [label="Health Monitoring" color="#C0CA33" fillcolor="#F9FBE7" shape=rectangle style=filled]
+	N10 [label="Hospice Care Coordination" color="#C2B2F0" fillcolor="#EFE6FF" shape=database style=filled]
+	N11 [label="Meal Preparation" color="#C0CA33" fillcolor="#F9FBE7" shape=vnode_shape style=filled]
+	N12 [label="Safety Assessments" color="#388E3C" fillcolor="#F1F8E9" shape=multipledocuments style=filled]
+	N13 [label="Cognitive Stimulation Activities" color="#C0CA33" fillcolor="#F9FBE7" shape=vnode_shape style=filled]
+	M0 [label="" color="#C2B2F0" fillcolor="#EFE6FF" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#C2B2F0" fillcolor="#EFE6FF" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Long_Term Care Planning {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Long_Term Care Planning"
+		nest0_0 [label="Memory Care" color="#C0CA33" fillcolor="#F9FBE7" shape=predefinedprocess style=filled]
+		nest0_1 [label="Palliative Care" color="#388E3C" fillcolor="#F1F8E9" shape=vnode_shape style=filled]
+		nest0_2 [label="Transportation Assistance" color="#C2B2F0" fillcolor="#EFE6FF" shape=rectangle style=filled]
+	}
+	N0 -> N1 [color="#C2B2F0" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#C2B2F0" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=dashed label="supports" dir=forward]
+	N4 -> N5 [color="#C0CA33" penwidth=1.5 style=dashed label="secures" dir=forward]
+	N5 -> N6 [color="#388E3C" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#C2B2F0" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#388E3C" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#C0CA33" penwidth=1.5 style=solid label="advises" dir=forward]
+	N9 -> N10 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#C0CA33" penwidth=1.5 style=dashed label="plans" dir=forward]
+	N11 -> N12 [color="#C2B2F0" penwidth=1.5 style=dashed dir=forward]
+	N12 -> N13 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#C2B2F0" penwidth=1.5 style=dashed label="comforts" dir=forward]
+	nest0_1 -> nest0_2 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	N8 -> nest0_0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> N13 [color="#C2B2F0" penwidth=1.5 style=dashed label="guides" dir=forward]
+	N5 -> M0 [color="#C2B2F0" penwidth=1.5 style=solid dir=forward]
+	N2 -> M0 [color="#388E3C" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N11 [color="#388E3C" penwidth=1.5 style=dashed dir=forward]
+	N10 -> M1 [color="#C2B2F0" penwidth=1.5 style=dashed dir=forward]
+	N9 -> M1 [color="#C0CA33" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M1 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	M1 -> N12 [color="#388E3C" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_146.dot b/test/diagrams/scanned_hard/diagrams_146.dot
new file mode 100644
index 0000000000000000000000000000000000000000..9f3861301d9f0776704ad03b4e8df89e3d8eb4c4
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_146.dot
@@ -0,0 +1,48 @@
+digraph {
+	rankdir=LR
+	N0 [label="Risk Assessment" color="#FFA726" fillcolor="#FFF3E0" shape=document style=filled]
+	N1 [label="Resilience Building" color="#4DB6AC" fillcolor="#E0F2F1" shape=vnode_shape style=filled]
+	N2 [label="Resource Mobilization" color="#FFCC80" fillcolor="#FFF0CC" shape=diamond style=filled]
+	N3 [label="Emergency Planning" color="#FFA726" fillcolor="#FFF3E0" shape=action style=filled]
+	N4 [label="Communication Protocols" color="#4DB6AC" fillcolor="#E0F2F1" shape=box style=filled]
+	N5 [label="Search and Rescue Operations" color="#4DB6AC" fillcolor="#E0F2F1" shape=parallelogram style=filled]
+	N6 [label="Logistics and Supply Chain" color="#FFA726" fillcolor="#FFF3E0" shape=inputoutput style=filled]
+	N7 [label="Information Dissemination" color="#4DB6AC" fillcolor="#E0F2F1" shape=action style=filled]
+	N8 [label="Hazard Mapping" color="#4DB6AC" fillcolor="#E0F2F1" shape=ellipse style=filled]
+	N9 [label="Drone Deployment for Assessment" color="#4DB6AC" fillcolor="#E0F2F1" shape=multipledocuments style=filled]
+	N10 [label="Post_Disaster Evaluation" color="#FFCC80" fillcolor="#FFF0CC" shape=parallelogram style=filled]
+	N11 [label="Early Warning Systems" color="#4DB6AC" fillcolor="#E0F2F1" shape=multipledocuments style=filled]
+	S0 [label="" color="#4DB6AC" fillcolor="#E0F2F1" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#4DB6AC" fillcolor="#E0F2F1" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#FFCC80" fillcolor="#FFF0CC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Public Awareness Campaigns {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Public Awareness Campaigns"
+		nest0_0 [label="Capacity Building for Local Communities" color="#FFCC80" fillcolor="#FFF0CC" shape=database style=filled]
+		nest0_1 [label="Reconstruction" color="#FFA726" fillcolor="#FFF3E0" shape=box style=filled]
+	}
+	N0 -> N1 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=dashed label="recovers" dir=forward]
+	N2 -> N3 [color="#FFA726" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#FFA726" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#FFCC80" penwidth=1.5 style=dashed label="donates" dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=solid label="supports" dir=forward]
+	N7 -> N8 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#000000" penwidth=1.5 style=dashed label="treats" dir=forward]
+	N9 -> N10 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	N10 -> nest0_0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> N4 [color="#000000" penwidth=1.5 style=solid label="communicates" dir=forward]
+	N6 -> S0 [color="#4DB6AC" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N8 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S0 -> N10 [color="#FFA726" penwidth=1.5 style=dashed dir=forward]
+	N7 -> S1 [color="#FFA726" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N11 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S1 -> N9 [color="#FFA726" penwidth=1.5 style=dashed dir=forward]
+	N5 -> M0 [color="#4DB6AC" penwidth=1.5 style=solid dir=forward]
+	N1 -> M0 [color="#4DB6AC" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_154.txt b/test/diagrams/scanned_hard/diagrams_154.txt
new file mode 100644
index 0000000000000000000000000000000000000000..403f994c09601c8a1df4d4696111909e630a44cc
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_154.txt
@@ -0,0 +1,17 @@
+<Altitude Tracking, connectedTo, Offline Map Support>
+<Autonomous Vehicle Navigation, orients, Altitude Tracking>
+<Celestial Navigation, connectedTo, ETA Estimation>
+<Dead Reckoning, leads, Geocoding>
+<ETA Estimation, connectedTo, Dead Reckoning>
+<Geocoding, connectedTo, Marine Charting>
+<Hazard Alerts, plots, Personalized Route Preferences>
+<Map Display, guides, Autonomous Vehicle Navigation>
+<Marine Charting, connectedTo, Autonomous Vehicle Navigation>
+<Marine Charting, validates, Route Calculation>
+<Multi_modal Navigation, displays, Speed Calculation>
+<Offline Map Support, connectedTo, Multi_modal Navigation>
+<Personalized Route Preferences, connectedTo, Celestial Navigation>
+<Personalized Route Preferences, connectedTo, ETA Estimation>
+<Personalized Route Preferences, connectedTo, Map Display>
+<Personalized Route Preferences, connectedTo, Multi_modal Navigation>
+<Speed Calculation, connectedTo, Celestial Navigation>
diff --git a/test/diagrams/scanned_hard/diagrams_155.txt b/test/diagrams/scanned_hard/diagrams_155.txt
new file mode 100644
index 0000000000000000000000000000000000000000..061234a3742c9b9d31ad09fa5505fcf702b937f0
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_155.txt
@@ -0,0 +1,18 @@
+<Altitude Tracking, connectedTo, Marine Charting>
+<Bearing and Distance Calculation, calculates, Topographic Mapping>
+<Celestial Navigation, connectedTo, Offline Map Support>
+<Celestial Navigation, identifies, Autonomous Vehicle Navigation>
+<Inertial Navigation System, connectedTo, Bearing and Distance Calculation>
+<Inertial Navigation System, connectedTo, Celestial Navigation>
+<Inertial Navigation System, connectedTo, Offline Map Support>
+<Inertial Navigation System, steers, Voice Guidance Customization>
+<Inertial Navigation System, updates, Autonomous Vehicle Navigation>
+<Lane Guidance, connectedTo, Celestial Navigation>
+<Map Display, connectedTo, Lane Guidance>
+<Marine Charting, connectedTo, Celestial Navigation>
+<Marine Charting, connectedTo, Map Display>
+<Marine Charting, orients, Inertial Navigation System>
+<Navigation Data Update, visualizes, Lane Guidance>
+<Offline Map Support, displays, Autonomous Vehicle Navigation>
+<Topographic Mapping, connectedTo, Navigation Data Update>
+<Voice Guidance Customization, connectedTo, Map Display>
diff --git a/test/diagrams/scanned_hard/diagrams_156.dot b/test/diagrams/scanned_hard/diagrams_156.dot
new file mode 100644
index 0000000000000000000000000000000000000000..5b3fe54a562cad9a0e1afd5c763afc3d5c9f568b
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_156.dot
@@ -0,0 +1,46 @@
+digraph {
+	rankdir=LR
+	N0 [label="Offline Map Support" color="#4FC3F7" fillcolor="#E1F5FE" shape=predefinedprocess style=filled]
+	N1 [label="ETA Estimation" color="#FF9800" fillcolor="#FFE0B2" shape=vnode_shape style=filled]
+	N2 [label="Cycle Route Planning" color="#C0CA33" fillcolor="#F9FBE7" shape=document style=filled]
+	N3 [label="Pedestrian Navigation" color="#FF9800" fillcolor="#FFE0B2" shape=rect style=filled]
+	N4 [label="Hazard Alerts" color="#FF9800" fillcolor="#FFE0B2" shape=box style=filled]
+	N5 [label="Voice Guidance Customization" color="#FF9800" fillcolor="#FFE0B2" shape=preparation style=filled]
+	N6 [label="Geocoding" color="#4FC3F7" fillcolor="#E1F5FE" shape=document style=filled]
+	N7 [label="Points of Interest Search" color="#C0CA33" fillcolor="#F9FBE7" shape=hexagon style=filled]
+	N8 [label="Turn_by_Turn Directions" color="#4FC3F7" fillcolor="#E1F5FE" shape=rect style=filled]
+	N9 [label="Traffic Information" color="#4FC3F7" fillcolor="#E1F5FE" shape=document style=filled]
+	N10 [label="Reverse Geocoding" color="#C0CA33" fillcolor="#F9FBE7" shape=action style=filled]
+	S0 [label="" color="#C0CA33" fillcolor="#F9FBE7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#4FC3F7" fillcolor="#E1F5FE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Navigation Data Update {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Navigation Data Update"
+		nest0_0 [label="Wearable Device Navigation" color="#4FC3F7" fillcolor="#E1F5FE" shape=vnode_shape style=filled]
+		nest0_1 [label="Inertial Navigation System" color="#4FC3F7" fillcolor="#E1F5FE" shape=rect style=filled]
+		nest0_2 [label="Altitude Tracking" color="#4FC3F7" fillcolor="#E1F5FE" shape=multipledocuments style=filled]
+		nest0_3 [label="Speed Calculation" color="#C0CA33" fillcolor="#F9FBE7" shape=document style=filled]
+	}
+	N0 -> N1 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#FF9800" penwidth=1.5 style=dashed label="alerts" dir=forward]
+	N3 -> N4 [color="#4FC3F7" penwidth=1.5 style=solid label="guides" dir=forward]
+	N4 -> N5 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#C0CA33" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#C0CA33" penwidth=1.5 style=dashed label="detects" dir=forward]
+	N7 -> N8 [color="#4FC3F7" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#000000" penwidth=1.5 style=dashed label="corrects" dir=forward]
+	nest0_2 -> nest0_3 [color="#C0CA33" penwidth=1.5 style=dashed label="calculates" dir=forward]
+	N8 -> nest0_0 [color="#C0CA33" penwidth=1.5 style=solid label="measures" dir=forward]
+	nest0_3 -> N7 [color="#4FC3F7" penwidth=1.5 style=solid dir=forward]
+	N6 -> S0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N9 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S0 -> N10 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M0 [color="#FF9800" penwidth=1.5 style=solid label="validates" dir=forward]
+	N2 -> M0 [color="#4FC3F7" penwidth=1.5 style=solid dir=forward]
+	M0 -> N5 [color="#C0CA33" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_158.txt b/test/diagrams/scanned_hard/diagrams_158.txt
new file mode 100644
index 0000000000000000000000000000000000000000..187fd3a311dbaff2e2a852c397c57f6fb50fefa9
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_158.txt
@@ -0,0 +1,21 @@
+<3D Model Design, connectedTo, Direct Metal Laser Sintering>
+<3D Model Design, connectedTo, Fused Deposition Modeling>
+<Aerospace Part Production, connectedTo, Medical Device Prototyping>
+<Construction 3D Printing, connectedTo, 3D Model Design>
+<Construction 3D Printing, connectedTo, Rapid Manufacturing>
+<Construction 3D Printing, educates, Fused Deposition Modeling>
+<Construction 3D Printing, enhances, Fused Deposition Modeling>
+<Consumer Product Creation, develops, File Format Conversion>
+<Digital Twin for 3D Prints, connectedTo, Sustainable 3D Printing Materials>
+<Direct Metal Laser Sintering, connectedTo, Rapid Manufacturing>
+<Distributed Manufacturing, connectedTo, Consumer Product Creation>
+<File Format Conversion, connectedTo, Selective Laser Sintering>
+<Maintenance and Repair of Printers, connectedTo, Material Selection>
+<Mass Customization, connectedTo, Fused Deposition Modeling>
+<Material Selection, licenses, Reverse Engineering with 3D Printing>
+<Medical Device Prototyping, connectedTo, Digital Twin for 3D Prints>
+<Medical Device Prototyping, connectedTo, Maintenance and Repair of Printers>
+<Rapid Manufacturing, connectedTo, Aerospace Part Production>
+<Reverse Engineering with 3D Printing, connectedTo, 3D Model Design>
+<Selective Laser Sintering, connectedTo, Mass Customization>
+<Sustainable 3D Printing Materials, connectedTo, Distributed Manufacturing>
diff --git a/test/diagrams/scanned_hard/diagrams_161.dot b/test/diagrams/scanned_hard/diagrams_161.dot
new file mode 100644
index 0000000000000000000000000000000000000000..7eedabe985f84ebd146741892fc3ed3d10d96435
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_161.dot
@@ -0,0 +1,48 @@
+digraph {
+	rankdir=BT
+	N0 [label="X_ray Diffraction" color="#61CAC3" fillcolor="#C2E8E6" shape=parallelogram style=filled]
+	N1 [label="Atomic Force Microscopy" color="#61CAC3" fillcolor="#C2E8E6" shape=document style=filled]
+	N2 [label="Biosensors" color="#00BCD4" fillcolor="#B2EBF2" shape=preparation style=filled]
+	N3 [label="Quantum Computing Integration" color="#61CAC3" fillcolor="#C2E8E6" shape=database style=filled]
+	N4 [label="Nanosensors" color="#00BCD4" fillcolor="#B2EBF2" shape=multipledocuments style=filled]
+	N5 [label="Transmission Electron Microscopy" color="#4285F4" fillcolor="#D0E0F8" shape=preparation style=filled]
+	N6 [label="Nanotoxicology" color="#00BCD4" fillcolor="#B2EBF2" shape=rect style=filled]
+	N7 [label="Nanoparticle Characterization" color="#4285F4" fillcolor="#D0E0F8" shape=parallelogram style=filled]
+	N8 [label="Drug Delivery Systems" color="#4285F4" fillcolor="#D0E0F8" shape=predefinedprocess style=filled]
+	N9 [label="Nanoscale Imaging" color="#00BCD4" fillcolor="#B2EBF2" shape=action style=filled]
+	N10 [label="Lab_on_a_Chip Devices" color="#00BCD4" fillcolor="#B2EBF2" shape=multipledocuments style=filled]
+	N11 [label="Computational Nanotechnology" color="#4285F4" fillcolor="#D0E0F8" shape=rectangle style=filled]
+	N12 [label="Nanomaterial Synthesis" color="#00BCD4" fillcolor="#B2EBF2" shape=rectangle style=filled]
+	S0 [label="" color="#61CAC3" fillcolor="#C2E8E6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#61CAC3" fillcolor="#C2E8E6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Nanodevice Fabrication {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Nanodevice Fabrication"
+		nest0_0 [label="Environmental Remediation with Nanomaterials" color="#00BCD4" fillcolor="#B2EBF2" shape=rect style=filled]
+		nest0_1 [label="Nanomedicine Development" color="#61CAC3" fillcolor="#C2E8E6" shape=action style=filled]
+		nest0_2 [label="Carbon Nanotube Synthesis" color="#4285F4" fillcolor="#D0E0F8" shape=parallelogram style=filled]
+	}
+	N0 -> N1 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#61CAC3" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#00BCD4" penwidth=1.5 style=dashed label="filters" dir=forward]
+	N5 -> N6 [color="#4285F4" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#00BCD4" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#00BCD4" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#4285F4" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#4285F4" penwidth=1.5 style=solid label="optimizes" dir=forward]
+	N10 -> N11 [color="#4285F4" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#4285F4" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#000000" penwidth=1.5 style=dashed label="converts" dir=forward]
+	nest0_1 -> nest0_2 [color="#61CAC3" penwidth=1.5 style=solid label="modifies" dir=forward]
+	N10 -> nest0_0 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	nest0_2 -> N12 [color="#00BCD4" penwidth=1.5 style=dashed dir=forward]
+	N6 -> S0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S0 -> N12 [color="#00BCD4" penwidth=1.5 style=dashed label="models" dir=forward]
+	S0 -> N10 [color="#4285F4" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M0 [color="#00BCD4" penwidth=1.5 style=dashed label="fabricates" dir=forward]
+	N0 -> M0 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N5 [color="#61CAC3" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_163.txt b/test/diagrams/scanned_hard/diagrams_163.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ca621d0a2f102f3a07c7cdc444478b7ba7443a77
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_163.txt
@@ -0,0 +1,17 @@
+<Decoherence Mitigation, connectedTo, Quantum Communication Protocols>
+<Decoherence Mitigation, connectedTo, Quantum Computing Education>
+<Interfacing Classical and Quantum Computers, connectedTo, Quantum Communication Protocols>
+<Interfacing Classical and Quantum Computers, processes, Decoherence Mitigation>
+<Post_Quantum Cryptography, shares, Quantum Sensing>
+<Quantum Advantage Demonstration, connectedTo, Topological Qubits>
+<Quantum Algorithm Development, computes, Interfacing Classical and Quantum Computers>
+<Quantum Algorithm Development, connectedTo, Quantum Computing Education>
+<Quantum Algorithm Development, protects, Post_Quantum Cryptography>
+<Quantum Annealing, connectedTo, Quantum Advantage Demonstration>
+<Quantum Bit Design, connectedTo, Post_Quantum Cryptography>
+<Quantum Communication Protocols, builds, Quantum Network Development>
+<Quantum Computing Education, connectedTo, Quantum Communication Protocols>
+<Quantum Hardware Control, visualizes, Quantum Algorithm Development>
+<Quantum Network Development, connectedTo, Topological Qubits>
+<Topological Qubits, connectedTo, Quantum Annealing>
+<Topological Qubits, connectedTo, Quantum Bit Design>
diff --git a/test/diagrams/scanned_hard/diagrams_165.dot b/test/diagrams/scanned_hard/diagrams_165.dot
new file mode 100644
index 0000000000000000000000000000000000000000..f8c8868d7d77a91f3945ace986fc7711c2916ade
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_165.dot
@@ -0,0 +1,50 @@
+digraph {
+	rankdir=TB
+	N0 [label="Quantum Computing Education" color="#F06292" fillcolor="#FCE4EC" shape=box style=filled]
+	N1 [label="Quantum Sensing" color="#80DDEA" fillcolor="#D3F7F9" shape=rect style=filled]
+	N2 [label="Financial Modeling with Quantum Computing" color="#F06292" fillcolor="#FCE4EC" shape=rectangle style=filled]
+	N3 [label="Quantum Processor Fabrication" color="#42A5F5" fillcolor="#F1F8FF" shape=predefinedprocess style=filled]
+	N4 [label="Quantum Simulation" color="#42A5F5" fillcolor="#F1F8FF" shape=document style=filled]
+	N5 [label="Quantum Programming Languages" color="#F06292" fillcolor="#FCE4EC" shape=document style=filled]
+	N6 [label="Optimization Problems with Quantum Annealing" color="#42A5F5" fillcolor="#F1F8FF" shape=parallelogram style=filled]
+	N7 [label="Quantum Supremacy Claims" color="#80DDEA" fillcolor="#D3F7F9" shape=action style=filled]
+	N8 [label="Quantum Computing for AI" color="#80DDEA" fillcolor="#D3F7F9" shape=rectangle style=filled]
+	N9 [label="Quantum Key Distribution" color="#80DDEA" fillcolor="#D3F7F9" shape=hexagon style=filled]
+	N10 [label="Quantum Network Development" color="#80DDEA" fillcolor="#D3F7F9" shape=hexagon style=filled]
+	N11 [label="Material Science Simulations" color="#F06292" fillcolor="#FCE4EC" shape=box style=filled]
+	N12 [label="Quantum Hardware Control" color="#42A5F5" fillcolor="#F1F8FF" shape=box style=filled]
+	S0 [label="" color="#F06292" fillcolor="#FCE4EC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#80DDEA" fillcolor="#D3F7F9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Quantum Cryptography {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Quantum Cryptography"
+		nest0_0 [label="Post_Quantum Cryptography" color="#42A5F5" fillcolor="#F1F8FF" shape=rect style=filled]
+		nest0_1 [label="Quantum Software Development Kit" color="#F06292" fillcolor="#FCE4EC" shape=rectangle style=filled]
+		nest0_2 [label="Photonic Qubits" color="#42A5F5" fillcolor="#F1F8FF" shape=rect style=filled]
+		nest0_3 [label="Vacuum Systems for Trapped Ions" color="#42A5F5" fillcolor="#F1F8FF" shape=ellipse style=filled]
+	}
+	N0 -> N1 [color="#80DDEA" penwidth=1.5 style=dashed label="solves" dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#80DDEA" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#80DDEA" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#F06292" penwidth=1.5 style=dashed label="benchmarks" dir=forward]
+	N5 -> N6 [color="#80DDEA" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#42A5F5" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#80DDEA" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#000000" penwidth=1.5 style=solid label="builds" dir=forward]
+	N10 -> N11 [color="#42A5F5" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#F06292" penwidth=1.5 style=solid label="verifies" dir=forward]
+	nest0_0 -> nest0_1 [color="#42A5F5" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#F06292" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> nest0_3 [color="#42A5F5" penwidth=1.5 style=solid label="transmits" dir=forward]
+	N8 -> nest0_0 [color="#42A5F5" penwidth=1.5 style=dashed label="shares" dir=forward]
+	nest0_3 -> N8 [color="#80DDEA" penwidth=1.5 style=solid dir=forward]
+	N2 -> S0 [color="#42A5F5" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N4 [color="#F06292" penwidth=1.5 style=solid label="superposes" dir=forward]
+	S0 -> N8 [color="#80DDEA" penwidth=1.5 style=dashed label="decrypts" dir=forward]
+	N0 -> M0 [color="#80DDEA" penwidth=1.5 style=solid dir=forward]
+	N2 -> M0 [color="#42A5F5" penwidth=1.5 style=solid dir=forward]
+	M0 -> N4 [color="#000000" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_167.txt b/test/diagrams/scanned_hard/diagrams_167.txt
new file mode 100644
index 0000000000000000000000000000000000000000..5b67b94c4d05e2eec7a3fffb9ccbb17533fd16df
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_167.txt
@@ -0,0 +1,16 @@
+<Cloud_based AR or VR Rendering, connectedTo, User Interface Design>
+<Cloud_based AR or VR Rendering, programs, Ethical Considerations in AR or VR>
+<Educational Content Development, connectedTo, Headset Development>
+<Educational Content Development, connectedTo, User Interface Design>
+<Ethical Considerations in AR or VR, connectedTo, User Interface Design>
+<Haptic Feedback Integration, connectedTo, Retail Experience Enhancement>
+<Haptic Feedback Integration, tracks, Cloud_based AR or VR Rendering>
+<Headset Development, connectedTo, Live Event Streaming in VR>
+<Headset Development, integrates, Haptic Feedback Integration>
+<Live Event Streaming in VR, connectedTo, AR for Navigation>
+<Retail Experience Enhancement, connectedTo, Tracking System Calibration>
+<Software Development Kit Integration, connectedTo, Live Event Streaming in VR>
+<Tracking System Calibration, connectedTo, AR for Navigation>
+<User Interface Design, connectedTo, AR for Navigation>
+<User Interface Design, connectedTo, Live Event Streaming in VR>
+<User Interface Design, monitors, Software Development Kit Integration>
diff --git a/test/diagrams/scanned_hard/diagrams_168.dot b/test/diagrams/scanned_hard/diagrams_168.dot
new file mode 100644
index 0000000000000000000000000000000000000000..5f8ef58945b35fcd1adcded4d690fc291f3a668f
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_168.dot
@@ -0,0 +1,48 @@
+digraph {
+	rankdir=BT
+	N0 [label="Comfort and Ergonomics Design" color="#CDDC39" fillcolor="#E6EE9C" shape=hexagon style=filled]
+	N1 [label="Data Visualization in AR or VR" color="#FFE69C" fillcolor="#FFF9D4" shape=parallelogram style=filled]
+	N2 [label="Hand Tracking and Interaction" color="#FFE69C" fillcolor="#FFF9D4" shape=predefinedprocess style=filled]
+	N3 [label="User Experience Testing" color="#CDDC39" fillcolor="#E6EE9C" shape=document style=filled]
+	N4 [label="User Interface Design" color="#FFE69C" fillcolor="#FFF9D4" shape=inputoutput style=filled]
+	N5 [label="Content Creation for AR or VR" color="#CDDC39" fillcolor="#E6EE9C" shape=parallelogram style=filled]
+	N6 [label="Virtual Tourism Experiences" color="#4FC3F7" fillcolor="#E1F5FE" shape=multipledocuments style=filled]
+	N7 [label="Tracking System Calibration" color="#4FC3F7" fillcolor="#E1F5FE" shape=hexagon style=filled]
+	N8 [label="Spatial Audio Implementation" color="#FFE69C" fillcolor="#FFF9D4" shape=database style=filled]
+	N9 [label="Facial Recognition in AR or VR" color="#FFE69C" fillcolor="#FFF9D4" shape=parallelogram style=filled]
+	N10 [label="Hardware Prototyping" color="#CDDC39" fillcolor="#E6EE9C" shape=ellipse style=filled]
+	N11 [label="Ethical Considerations in AR or VR" color="#4FC3F7" fillcolor="#E1F5FE" shape=inputoutput style=filled]
+	S0 [label="" color="#4FC3F7" fillcolor="#E1F5FE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#FFE69C" fillcolor="#FFF9D4" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Retail Experience Enhancement {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Retail Experience Enhancement"
+		nest0_0 [label="Performance Optimization" color="#CDDC39" fillcolor="#E6EE9C" shape=inputoutput style=filled]
+		nest0_1 [label="Eye Tracking" color="#4FC3F7" fillcolor="#E1F5FE" shape=multipledocuments style=filled]
+		nest0_2 [label="Virtual Showrooms" color="#CDDC39" fillcolor="#E6EE9C" shape=database style=filled]
+		nest0_3 [label="Training Simulations" color="#CDDC39" fillcolor="#E6EE9C" shape=rect style=filled]
+	}
+	N0 -> N1 [color="#CDDC39" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=dashed label="creates" dir=forward]
+	N2 -> N3 [color="#4FC3F7" penwidth=1.5 style=solid label="designs" dir=forward]
+	N3 -> N4 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#CDDC39" penwidth=1.5 style=solid label="immerses" dir=forward]
+	N5 -> N6 [color="#4FC3F7" penwidth=1.5 style=solid label="interacts" dir=forward]
+	N6 -> N7 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#CDDC39" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#4FC3F7" penwidth=1.5 style=solid label="displays" dir=forward]
+	N10 -> N11 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#4FC3F7" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> nest0_2 [color="#CDDC39" penwidth=1.5 style=solid label="measures" dir=forward]
+	nest0_2 -> nest0_3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N1 -> nest0_0 [color="#000000" penwidth=1.5 style=dashed label="personalizes" dir=forward]
+	nest0_3 -> N8 [color="#4FC3F7" penwidth=1.5 style=solid dir=forward]
+	N8 -> S0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N11 [color="#CDDC39" penwidth=1.5 style=solid label="streamlines" dir=forward]
+	S0 -> N10 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	N5 -> M0 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M0 [color="#4FC3F7" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N8 [color="#CDDC39" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_171.txt b/test/diagrams/scanned_hard/diagrams_171.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ae256424d277d2276f3206e43948e351906c7abd
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_171.txt
@@ -0,0 +1,15 @@
+<Anti_Cheat Development, connectedTo, User Experience Design>
+<Character Design, connectedTo, Anti_Cheat Development>
+<Engine Development, distributes, Character Design>
+<In_Game Economy Design, connectedTo, Anti_Cheat Development>
+<Narrative Design, connectedTo, In_Game Economy Design>
+<Physics Simulation, connectedTo, Virtual Reality Gaming>
+<Player Feedback Integration, connectedTo, Physics Simulation>
+<Quality Assurance Testing, designs, Game Balancing>
+<Sound Design, connectedTo, Quality Assurance Testing>
+<User Experience Design, connectedTo, Player Feedback Integration>
+<Virtual Reality Gaming, connectedTo, Engine Development>
+<Virtual Reality Gaming, connectedTo, Game Balancing>
+<Virtual Reality Gaming, connectedTo, Sound Design>
+<Virtual Reality Gaming, leads, Quality Assurance Testing>
+<Virtual Reality Gaming, updates, In_Game Economy Design>
diff --git a/test/diagrams/scanned_hard/diagrams_179.dot b/test/diagrams/scanned_hard/diagrams_179.dot
new file mode 100644
index 0000000000000000000000000000000000000000..557bd815b2e43a2d306b1f91b94aad0ac642a519
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_179.dot
@@ -0,0 +1,44 @@
+digraph {
+	rankdir=TB
+	N0 [label="Audience Analysis" color="#FFF176" fillcolor="#FFFDE7" shape=diamond style=filled]
+	N1 [label="Plagiarism Checking" color="#CFCFCF" fillcolor="#F6F6F6" shape=parallelogram style=filled]
+	N2 [label="Transcribing Audio or Video" color="#E0E0E0" fillcolor="#EBEBEB" shape=action style=filled]
+	N3 [label="Animation" color="#CFCFCF" fillcolor="#F6F6F6" shape=hexagon style=filled]
+	N4 [label="Keyword Research" color="#E0E0E0" fillcolor="#EBEBEB" shape=box style=filled]
+	N5 [label="Podcast Production" color="#CFCFCF" fillcolor="#F6F6F6" shape=document style=filled]
+	N6 [label="Graphic Design" color="#FFF176" fillcolor="#FFFDE7" shape=rectangle style=filled]
+	N7 [label="Webinar Hosting" color="#FFF176" fillcolor="#FFFDE7" shape=diamond style=filled]
+	N8 [label="Content Strategy Development" color="#CFCFCF" fillcolor="#F6F6F6" shape=box style=filled]
+	N9 [label="Influencer Collaboration" color="#CFCFCF" fillcolor="#F6F6F6" shape=ellipse style=filled]
+	N10 [label="Search Engine Optimization" color="#E0E0E0" fillcolor="#EBEBEB" shape=predefinedprocess style=filled]
+	N11 [label="E_book Writing" color="#FFF176" fillcolor="#FFFDE7" shape=database style=filled]
+	S0 [label="" color="#FFF176" fillcolor="#FFFDE7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#E0E0E0" fillcolor="#EBEBEB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Content Localization {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Content Localization"
+		nest0_0 [label="Publishing" color="#FFF176" fillcolor="#FFFDE7" shape=action style=filled]
+		nest0_1 [label="Monetization Strategy" color="#FFF176" fillcolor="#FFFDE7" shape=document style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=solid label="writes" dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=dashed label="records" dir=forward]
+	N2 -> N3 [color="#CFCFCF" penwidth=1.5 style=solid label="analyzes" dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#FFF176" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#CFCFCF" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#E0E0E0" penwidth=1.5 style=solid label="shares" dir=forward]
+	N7 -> N8 [color="#FFF176" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#CFCFCF" penwidth=1.5 style=dashed dir=forward]
+	N10 -> N11 [color="#CFCFCF" penwidth=1.5 style=dashed label="tracks" dir=forward]
+	nest0_0 -> nest0_1 [color="#CFCFCF" penwidth=1.5 style=dashed dir=forward]
+	N5 -> nest0_0 [color="#E0E0E0" penwidth=1.5 style=solid label="engages" dir=forward]
+	nest0_1 -> N10 [color="#CFCFCF" penwidth=1.5 style=solid label="publishes" dir=forward]
+	N4 -> S0 [color="#FFF176" penwidth=1.5 style=solid dir=forward]
+	S0 -> N6 [color="#000000" penwidth=1.5 style=dashed label="edits" dir=forward]
+	S0 -> N8 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N5 -> M0 [color="#CFCFCF" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M0 [color="#E0E0E0" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N10 [color="#E0E0E0" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_18.dot b/test/diagrams/scanned_hard/diagrams_18.dot
new file mode 100644
index 0000000000000000000000000000000000000000..fe8940beaee232bf021625face39710d5d1d49e9
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_18.dot
@@ -0,0 +1,23 @@
+digraph {
+	rankdir=RL
+	N0 [label="Return Handling" color="#388E3C" fillcolor="#C8E6C9" shape=multipledocuments style=filled]
+	N1 [label="Point of Sale System Update" color="#FFF9AE" fillcolor="#FFFCE6" shape=diamond style=filled]
+	N2 [label="Sales Forecasting" color="#64B5F6" fillcolor="#E3F2FD" shape=inputoutput style=filled]
+	N3 [label="Fitting Room Management" color="#64B5F6" fillcolor="#E3F2FD" shape=document style=filled]
+	N4 [label="Security Tagging" color="#64B5F6" fillcolor="#E3F2FD" shape=predefinedprocess style=filled]
+	N5 [label="Daily Report Generation" color="#388E3C" fillcolor="#C8E6C9" shape=rect style=filled]
+	N6 [label="Order Fulfillment" color="#FFF9AE" fillcolor="#FFFCE6" shape=document style=filled]
+	N7 [label="Price Tagging" color="#388E3C" fillcolor="#C8E6C9" shape=action style=filled]
+	N8 [label="Barcode Scanning" color="#64B5F6" fillcolor="#E3F2FD" shape=predefinedprocess style=filled]
+	N9 [label="Seasonal Sales Planning" color="#FFF9AE" fillcolor="#FFFCE6" shape=box style=filled]
+	N0 -> N1 [color="#64B5F6" penwidth=1.5 style=solid label="trains" dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#388E3C" penwidth=1.5 style=dashed label="inventories" dir=forward]
+	N3 -> N4 [color="#64B5F6" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#FFF9AE" penwidth=1.5 style=solid label="forecasts" dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=dashed label="supplies" dir=forward]
+	N6 -> N7 [color="#388E3C" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#64B5F6" penwidth=1.5 style=dashed label="secures" dir=forward]
+	N8 -> N9 [color="#000000" penwidth=1.5 style=dashed label="optimizes" dir=forward]
+	N1 -> N5 [color="#FFF9AE" penwidth=1.5 style=dashed label="purchases" dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_182.dot b/test/diagrams/scanned_hard/diagrams_182.dot
new file mode 100644
index 0000000000000000000000000000000000000000..c832caccca1446720d07b5e46599ff037c910599
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_182.dot
@@ -0,0 +1,54 @@
+digraph {
+	rankdir=LR
+	N0 [label="Big Data Processing" color="#FBC02D" fillcolor="#FFFDE7" shape=action style=filled]
+	N1 [label="Report Generation" color="#4285F4" fillcolor="#D0E0F8" shape=action style=filled]
+	N2 [label="Data Security Best Practices" color="#BDAFA8" fillcolor="#E4E0DF" shape=action style=filled]
+	N3 [label="Financial Data Analysis" color="#BDAFA8" fillcolor="#E4E0DF" shape=multipledocuments style=filled]
+	N4 [label="Marketing Campaign Analysis" color="#FBC02D" fillcolor="#FFFDE7" shape=document style=filled]
+	N5 [label="Natural Language Processing for Data" color="#BDAFA8" fillcolor="#E4E0DF" shape=rectangle style=filled]
+	N6 [label="Sales Performance Analysis" color="#4285F4" fillcolor="#D0E0F8" shape=ellipse style=filled]
+	N7 [label="Data Storytelling" color="#FBC02D" fillcolor="#FFFDE7" shape=preparation style=filled]
+	N8 [label="Prescriptive Analytics" color="#4285F4" fillcolor="#D0E0F8" shape=diamond style=filled]
+	N9 [label="A or B Testing Analysis" color="#4285F4" fillcolor="#D0E0F8" shape=action style=filled]
+	N10 [label="Web Analytics" color="#FBC02D" fillcolor="#FFFDE7" shape=multipledocuments style=filled]
+	N11 [label="Business User Training on Analytics" color="#BDAFA8" fillcolor="#E4E0DF" shape=vnode_shape style=filled]
+	N12 [label="Data Governance" color="#FBC02D" fillcolor="#FFFDE7" shape=inputoutput style=filled]
+	N13 [label="Statistical Modeling" color="#BDAFA8" fillcolor="#E4E0DF" shape=parallelogram style=filled]
+	N14 [label="Data Pipeline Development" color="#FBC02D" fillcolor="#FFFDE7" shape=diamond style=filled]
+	S0 [label="" color="#4285F4" fillcolor="#D0E0F8" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#FBC02D" fillcolor="#FFFDE7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#FBC02D" fillcolor="#FFFDE7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Sentiment Analysis {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Sentiment Analysis"
+		nest0_0 [label="Healthcare Data Analysis" color="#BDAFA8" fillcolor="#E4E0DF" shape=preparation style=filled]
+		nest0_1 [label="Predictive Analytics" color="#FBC02D" fillcolor="#FFFDE7" shape=hexagon style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#BDAFA8" penwidth=1.5 style=dashed label="accesses" dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#4285F4" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=solid label="optimizes" dir=forward]
+	N6 -> N7 [color="#FBC02D" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#4285F4" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#FBC02D" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#4285F4" penwidth=1.5 style=solid dir=forward]
+	N12 -> N13 [color="#BDAFA8" penwidth=1.5 style=dashed label="tracks" dir=forward]
+	N13 -> N14 [color="#FBC02D" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#BDAFA8" penwidth=1.5 style=solid dir=forward]
+	N5 -> nest0_0 [color="#000000" penwidth=1.5 style=dashed label="develops" dir=forward]
+	nest0_1 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N11 -> S0 [color="#4285F4" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N14 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N13 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N7 -> S1 [color="#FBC02D" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N11 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N12 [color="#BDAFA8" penwidth=1.5 style=solid label="shares" dir=forward]
+	N0 -> M0 [color="#FBC02D" penwidth=1.5 style=dashed label="predicts" dir=forward]
+	N2 -> M0 [color="#BDAFA8" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_183.txt b/test/diagrams/scanned_hard/diagrams_183.txt
new file mode 100644
index 0000000000000000000000000000000000000000..16c36bbbd6cb232dba73d18e997a5529b92c5225
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_183.txt
@@ -0,0 +1,24 @@
+<Dashboard Creation, connectedTo, Text Analytics>
+<Data Mining, audits, Geospatial Analysis>
+<Data Quality Assurance, connectedTo, Supply Chain Analytics>
+<Data Security Best Practices, connectedTo, Data Mining>
+<Data Security Best Practices, connectedTo, Sentiment Analysis>
+<Data Transformation, connectedTo, Data Visualization>
+<Data Transformation, connectedTo, Sentiment Analysis>
+<Data Visualization, measures, Dashboard Creation>
+<Geospatial Analysis, connectedTo, Sentiment Analysis>
+<Geospatial Analysis, visualizes, Data Transformation>
+<HR Data Analytics, connectedTo, Risk Analytics>
+<Healthcare Data Analysis, automates, Operational Efficiency Metrics>
+<Operational Efficiency Metrics, connectedTo, Data Quality Assurance>
+<Predictive Analytics, connectedTo, Data Security Best Practices>
+<Predictive Analytics, connectedTo, Sentiment Analysis>
+<Report Generation, connectedTo, Healthcare Data Analysis>
+<Sentiment Analysis, collects, Operational Efficiency Metrics>
+<Sentiment Analysis, connectedTo, Web Analytics>
+<Supply Chain Analytics, forecasts, HR Data Analytics>
+<Text Analytics, connectedTo, Sentiment Analysis>
+<Web Analytics, connectedTo, Data Quality Assurance>
+<Web Analytics, connectedTo, Operational Efficiency Metrics>
+<Web Analytics, connectedTo, Report Generation>
+<Web Analytics, mines, HR Data Analytics>
diff --git a/test/diagrams/scanned_hard/diagrams_184.dot b/test/diagrams/scanned_hard/diagrams_184.dot
new file mode 100644
index 0000000000000000000000000000000000000000..1685b270c29bd06bad75b5537b0ef12bfa8cd7da
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_184.dot
@@ -0,0 +1,44 @@
+digraph {
+	rankdir=RL
+	N0 [label="Data Security in BI" color="#FFC2C2" fillcolor="#FFEBEB" shape=action style=filled]
+	N1 [label="Budget Performance Analysis" color="#4DB6AC" fillcolor="#E0F2F1" shape=action style=filled]
+	N2 [label="Data Governance Policies" color="#4DB6AC" fillcolor="#E0F2F1" shape=action style=filled]
+	N3 [label="Data Source Integration" color="#4FC3F7" fillcolor="#E1F5FE" shape=predefinedprocess style=filled]
+	N4 [label="Supply Chain Optimization" color="#4FC3F7" fillcolor="#E1F5FE" shape=parallelogram style=filled]
+	N5 [label="Embedded Analytics" color="#4DB6AC" fillcolor="#E0F2F1" shape=document style=filled]
+	N6 [label="Data Warehousing" color="#4FC3F7" fillcolor="#E1F5FE" shape=predefinedprocess style=filled]
+	N7 [label="Strategic Planning Support" color="#4FC3F7" fillcolor="#E1F5FE" shape=hexagon style=filled]
+	N8 [label="Cloud BI Solutions" color="#4FC3F7" fillcolor="#E1F5FE" shape=rectangle style=filled]
+	S0 [label="" color="#4FC3F7" fillcolor="#E1F5FE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#4FC3F7" fillcolor="#E1F5FE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#FFC2C2" fillcolor="#FFEBEB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Mobile BI Development {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Mobile BI Development"
+		nest0_0 [label="KPI Definition" color="#4FC3F7" fillcolor="#E1F5FE" shape=database style=filled]
+		nest0_1 [label="Self_Service BI Tools" color="#FFC2C2" fillcolor="#FFEBEB" shape=document style=filled]
+		nest0_2 [label="OLAP Cube Creation" color="#FFC2C2" fillcolor="#FFEBEB" shape=rectangle style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#4DB6AC" penwidth=1.5 style=dashed label="governs" dir=forward]
+	N2 -> N3 [color="#FFC2C2" penwidth=1.5 style=dashed label="presents" dir=forward]
+	N3 -> N4 [color="#4DB6AC" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#FFC2C2" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#4DB6AC" penwidth=1.5 style=solid label="ETLs" dir=forward]
+	nest0_1 -> nest0_2 [color="#000000" penwidth=1.5 style=dashed label="strategies" dir=forward]
+	N3 -> nest0_0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> N5 [color="#000000" penwidth=1.5 style=dashed label="designs" dir=forward]
+	N5 -> S0 [color="#4FC3F7" penwidth=1.5 style=solid dir=forward]
+	S0 -> N7 [color="#4FC3F7" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N8 [color="#FFC2C2" penwidth=1.5 style=solid label="evaluates" dir=forward]
+	N0 -> M0 [color="#FFC2C2" penwidth=1.5 style=dashed dir=forward]
+	N4 -> M0 [color="#4FC3F7" penwidth=1.5 style=solid dir=forward]
+	M0 -> N8 [color="#4FC3F7" penwidth=1.5 style=solid dir=forward]
+	N0 -> M1 [color="#FFC2C2" penwidth=1.5 style=solid dir=forward]
+	N2 -> M1 [color="#4DB6AC" penwidth=1.5 style=dashed label="loads" dir=forward]
+	M1 -> N4 [color="#000000" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_184.txt b/test/diagrams/scanned_hard/diagrams_184.txt
new file mode 100644
index 0000000000000000000000000000000000000000..98098746c293ea08a76910e224096025d946c6ae
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_184.txt
@@ -0,0 +1,18 @@
+<Budget Performance Analysis, governs, Data Governance Policies>
+<Data Governance Policies, loads, Supply Chain Optimization>
+<Data Governance Policies, presents, Data Source Integration>
+<Data Security in BI, connectedTo, Budget Performance Analysis>
+<Data Security in BI, connectedTo, Cloud BI Solutions>
+<Data Security in BI, connectedTo, Supply Chain Optimization>
+<Data Source Integration, connectedTo, KPI Definition>
+<Data Source Integration, connectedTo, Supply Chain Optimization>
+<Data Warehousing, connectedTo, Strategic Planning Support>
+<Embedded Analytics, connectedTo, Data Warehousing>
+<Embedded Analytics, connectedTo, Strategic Planning Support>
+<Embedded Analytics, evaluates, Cloud BI Solutions>
+<KPI Definition, ETLs, Self_Service BI Tools>
+<OLAP Cube Creation, designs, Embedded Analytics>
+<Self_Service BI Tools, strategies, OLAP Cube Creation>
+<Strategic Planning Support, connectedTo, Cloud BI Solutions>
+<Supply Chain Optimization, connectedTo, Cloud BI Solutions>
+<Supply Chain Optimization, connectedTo, Embedded Analytics>
diff --git a/test/diagrams/scanned_hard/diagrams_19.txt b/test/diagrams/scanned_hard/diagrams_19.txt
new file mode 100644
index 0000000000000000000000000000000000000000..af251a7187c87864df728b4b3060a3eda591a6b0
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_19.txt
@@ -0,0 +1,10 @@
+<Body Shop Repair, fuels, Autonomous Driving Software Development>
+<Component Testing, schedules, Vehicle Financing>
+<Engine Installation, connectedTo, Infotainment System Integration>
+<Fuel Efficiency Check, connectedTo, Infotainment System Integration>
+<Fuel Efficiency Check, engineers, Research and Development>
+<Infotainment System Integration, connectedTo, Component Testing>
+<Recall Management, connectedTo, Engine Installation>
+<Research and Development, connectedTo, Autonomous Driving Software Development>
+<Research and Development, markets, Body Shop Repair>
+<Vehicle Financing, calibrates, Fuel Efficiency Check>
diff --git a/test/diagrams/scanned_hard/diagrams_190.dot b/test/diagrams/scanned_hard/diagrams_190.dot
new file mode 100644
index 0000000000000000000000000000000000000000..104d465207545573d995a1d7b80dcb39d47fb44d
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_190.dot
@@ -0,0 +1,54 @@
+digraph {
+	rankdir=LR
+	N0 [label="Direct Response Campaigns" color="#388E3C" fillcolor="#C8E6C9" shape=preparation style=filled]
+	N1 [label="Conversion Tracking" color="#73C6BC" fillcolor="#D0EFEE" shape=hexagon style=filled]
+	N2 [label="A or B Testing for Ads" color="#388E3C" fillcolor="#C8E6C9" shape=rectangle style=filled]
+	N3 [label="Programmatic Advertising" color="#E57373" fillcolor="#FFEBEE" shape=action style=filled]
+	N4 [label="Video Advertising" color="#73C6BC" fillcolor="#D0EFEE" shape=diamond style=filled]
+	N5 [label="Privacy Concerns in Ads" color="#388E3C" fillcolor="#C8E6C9" shape=ellipse style=filled]
+	N6 [label="Print Advertising" color="#73C6BC" fillcolor="#D0EFEE" shape=rectangle style=filled]
+	N7 [label="Display Advertising" color="#E57373" fillcolor="#FFEBEE" shape=inputoutput style=filled]
+	N8 [label="Geo_Targeting" color="#388E3C" fillcolor="#C8E6C9" shape=parallelogram style=filled]
+	N9 [label="Performance Tracking" color="#E57373" fillcolor="#FFEBEE" shape=preparation style=filled]
+	N10 [label="Brand Awareness Campaigns" color="#E57373" fillcolor="#FFEBEE" shape=predefinedprocess style=filled]
+	N11 [label="Ad Network Management" color="#73C6BC" fillcolor="#D0EFEE" shape=preparation style=filled]
+	N12 [label="Budget Management" color="#E57373" fillcolor="#FFEBEE" shape=rect style=filled]
+	S0 [label="" color="#388E3C" fillcolor="#C8E6C9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#E57373" fillcolor="#FFEBEE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#E57373" fillcolor="#FFEBEE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Interactive Ad Formats {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Interactive Ad Formats"
+		nest0_0 [label="Audience Segmentation for Ads" color="#E57373" fillcolor="#FFEBEE" shape=parallelogram style=filled]
+		nest0_1 [label="Ad Placement Optimization" color="#E57373" fillcolor="#FFEBEE" shape=inputoutput style=filled]
+		nest0_2 [label="Visual Design for Ads" color="#388E3C" fillcolor="#C8E6C9" shape=preparation style=filled]
+		nest0_3 [label="Campaign Planning" color="#73C6BC" fillcolor="#D0EFEE" shape=document style=filled]
+	}
+	N0 -> N1 [color="#73C6BC" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#73C6BC" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#73C6BC" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#E57373" penwidth=1.5 style=dashed label="tracks performance" dir=forward]
+	N6 -> N7 [color="#73C6BC" penwidth=1.5 style=dashed label="creates ads" dir=forward]
+	N7 -> N8 [color="#73C6BC" penwidth=1.5 style=solid label="programmatic ads" dir=forward]
+	N8 -> N9 [color="#E57373" penwidth=1.5 style=solid label="optimizes campaigns" dir=forward]
+	N9 -> N10 [color="#73C6BC" penwidth=1.5 style=solid label="outdoor ads" dir=forward]
+	N10 -> N11 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	N11 -> N12 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#E57373" penwidth=1.5 style=dashed label="manages budgets" dir=forward]
+	nest0_1 -> nest0_2 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> nest0_3 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	N1 -> nest0_0 [color="#73C6BC" penwidth=1.5 style=dashed dir=forward]
+	nest0_3 -> N2 [color="#73C6BC" penwidth=1.5 style=solid dir=forward]
+	N5 -> S0 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	S0 -> N12 [color="#73C6BC" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N10 [color="#E57373" penwidth=1.5 style=dashed label="implements retargeting" dir=forward]
+	N8 -> S1 [color="#73C6BC" penwidth=1.5 style=solid dir=forward]
+	S1 -> N12 [color="#000000" penwidth=1.5 style=dashed label="builds awareness" dir=forward]
+	S1 -> N11 [color="#73C6BC" penwidth=1.5 style=solid dir=forward]
+	N4 -> M0 [color="#E57373" penwidth=1.5 style=solid label="targets audiences" dir=forward]
+	N0 -> M0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	M0 -> N7 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_190.txt b/test/diagrams/scanned_hard/diagrams_190.txt
new file mode 100644
index 0000000000000000000000000000000000000000..2369aa9f26a3dfa9c499783103ba0794bbd77106
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_190.txt
@@ -0,0 +1,23 @@
+<A or B Testing for Ads, connectedTo, Programmatic Advertising>
+<Ad Network Management, connectedTo, Budget Management>
+<Ad Placement Optimization, connectedTo, Visual Design for Ads>
+<Audience Segmentation for Ads, manages budgets, Ad Placement Optimization>
+<Brand Awareness Campaigns, connectedTo, Ad Network Management>
+<Campaign Planning, connectedTo, A or B Testing for Ads>
+<Conversion Tracking, connectedTo, A or B Testing for Ads>
+<Conversion Tracking, connectedTo, Audience Segmentation for Ads>
+<Direct Response Campaigns, connectedTo, Conversion Tracking>
+<Direct Response Campaigns, connectedTo, Display Advertising>
+<Display Advertising, programmatic ads, Geo_Targeting>
+<Geo_Targeting, builds awareness, Budget Management>
+<Geo_Targeting, connectedTo, Ad Network Management>
+<Geo_Targeting, optimizes campaigns, Performance Tracking>
+<Performance Tracking, outdoor ads, Brand Awareness Campaigns>
+<Print Advertising, creates ads, Display Advertising>
+<Privacy Concerns in Ads, connectedTo, Budget Management>
+<Privacy Concerns in Ads, implements retargeting, Brand Awareness Campaigns>
+<Privacy Concerns in Ads, tracks performance, Print Advertising>
+<Programmatic Advertising, connectedTo, Video Advertising>
+<Video Advertising, connectedTo, Privacy Concerns in Ads>
+<Video Advertising, targets audiences, Display Advertising>
+<Visual Design for Ads, connectedTo, Campaign Planning>
diff --git a/test/diagrams/scanned_hard/diagrams_196.dot b/test/diagrams/scanned_hard/diagrams_196.dot
new file mode 100644
index 0000000000000000000000000000000000000000..832555d750efbda72898f1f6e33c568e3a47804a
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_196.dot
@@ -0,0 +1,50 @@
+digraph {
+	rankdir=LR
+	N0 [label="Blockchain Integration" color="#7986CB" fillcolor="#E8EAF6" shape=parallelogram style=filled]
+	N1 [label="Token Generation Event" color="#7986CB" fillcolor="#E8EAF6" shape=diamond style=filled]
+	N2 [label="Initial Exchange Offering" color="#00BCD4" fillcolor="#B2EBF2" shape=database style=filled]
+	N3 [label="Exchange Listing" color="#EAEFA5" fillcolor="#FDFCEB" shape=inputoutput style=filled]
+	N4 [label="Regulatory Compliance" color="#7986CB" fillcolor="#E8EAF6" shape=vnode_shape style=filled]
+	N5 [label="Key Management" color="#00BCD4" fillcolor="#B2EBF2" shape=hexagon style=filled]
+	N6 [label="Cryptocurrency Education" color="#EAEFA5" fillcolor="#FDFCEB" shape=diamond style=filled]
+	N7 [label="Coin Creation" color="#00BCD4" fillcolor="#B2EBF2" shape=rect style=filled]
+	N8 [label="Venture Capital Funding" color="#7986CB" fillcolor="#E8EAF6" shape=parallelogram style=filled]
+	N9 [label="Market Analysis" color="#00BCD4" fillcolor="#B2EBF2" shape=diamond style=filled]
+	N10 [label="Interoperability Solutions" color="#00BCD4" fillcolor="#B2EBF2" shape=preparation style=filled]
+	N11 [label="GameFi Development" color="#EAEFA5" fillcolor="#FDFCEB" shape=inputoutput style=filled]
+	N12 [label="Mining Algorithm Design" color="#7986CB" fillcolor="#E8EAF6" shape=parallelogram style=filled]
+	N13 [label="Stablecoin Design" color="#EAEFA5" fillcolor="#FDFCEB" shape=multipledocuments style=filled]
+	N14 [label="Transaction Processing" color="#EAEFA5" fillcolor="#FDFCEB" shape=rect style=filled]
+	S0 [label="" color="#7986CB" fillcolor="#E8EAF6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#EAEFA5" fillcolor="#FDFCEB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Lending and Borrowing Protocols {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Lending and Borrowing Protocols"
+		nest0_0 [label="Wallet Development" color="#00BCD4" fillcolor="#B2EBF2" shape=parallelogram style=filled]
+		nest0_1 [label="Hot Wallet Security" color="#EAEFA5" fillcolor="#FDFCEB" shape=multipledocuments style=filled]
+	}
+	N0 -> N1 [color="#7986CB" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#00BCD4" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#EAEFA5" penwidth=1.5 style=solid label="lends funds" dir=forward]
+	N4 -> N5 [color="#EAEFA5" penwidth=1.5 style=dashed label="generates yield" dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=solid label="educates users" dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#7986CB" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#EAEFA5" penwidth=1.5 style=dashed label="creates NFTs" dir=forward]
+	N10 -> N11 [color="#00BCD4" penwidth=1.5 style=solid label="manages portfolios" dir=forward]
+	N11 -> N12 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	N12 -> N13 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	N13 -> N14 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N12 -> nest0_0 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> N12 [color="#EAEFA5" penwidth=1.5 style=dashed label="distributes airdrops" dir=forward]
+	N9 -> S0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N12 [color="#7986CB" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N13 [color="#7986CB" penwidth=1.5 style=solid label="builds communities" dir=forward]
+	N2 -> M0 [color="#00BCD4" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M0 [color="#EAEFA5" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N10 [color="#00BCD4" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_197.dot b/test/diagrams/scanned_hard/diagrams_197.dot
new file mode 100644
index 0000000000000000000000000000000000000000..6fba9b5869a52f2e4020e13ac1ed852670d3f78a
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_197.dot
@@ -0,0 +1,50 @@
+digraph {
+	rankdir=TB
+	N0 [label="Custodial Services" color="#FFDA4E" fillcolor="#FFE88D" shape=vnode_shape style=filled]
+	N1 [label="Regulatory Compliance" color="#81C784" fillcolor="#F1F8E9" shape=hexagon style=filled]
+	N2 [label="Transaction Processing" color="#81C784" fillcolor="#F1F8E9" shape=ellipse style=filled]
+	N3 [label="Airdrop Campaigns" color="#FFDA4E" fillcolor="#FFE88D" shape=hexagon style=filled]
+	N4 [label="Blockchain Explorers" color="#81C784" fillcolor="#F1F8E9" shape=multipledocuments style=filled]
+	N5 [label="Interoperability Solutions" color="#FFDA4E" fillcolor="#FFE88D" shape=diamond style=filled]
+	N6 [label="Community Building" color="#388E3C" fillcolor="#F1F8E9" shape=action style=filled]
+	N7 [label="KYC or AML Procedures" color="#FFDA4E" fillcolor="#FFE88D" shape=document style=filled]
+	N8 [label="Smart Contract Auditing" color="#81C784" fillcolor="#F1F8E9" shape=ellipse style=filled]
+	N9 [label="Tax Reporting for Crypto" color="#FFDA4E" fillcolor="#FFE88D" shape=diamond style=filled]
+	N10 [label="Fraud Prevention" color="#388E3C" fillcolor="#F1F8E9" shape=preparation style=filled]
+	N11 [label="Lending and Borrowing Protocols" color="#FFDA4E" fillcolor="#FFE88D" shape=diamond style=filled]
+	N12 [label="Staking" color="#81C784" fillcolor="#F1F8E9" shape=multipledocuments style=filled]
+	N13 [label="Initial Exchange Offering" color="#FFDA4E" fillcolor="#FFE88D" shape=inputoutput style=filled]
+	S0 [label="" color="#FFDA4E" fillcolor="#FFE88D" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#FFDA4E" fillcolor="#FFE88D" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Portfolio Management {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Portfolio Management"
+		nest0_0 [label="Cross_chain Swaps" color="#388E3C" fillcolor="#F1F8E9" shape=document style=filled]
+		nest0_1 [label="Cryptocurrency Education" color="#81C784" fillcolor="#F1F8E9" shape=inputoutput style=filled]
+		nest0_2 [label="Web3 Integration" color="#FFDA4E" fillcolor="#FFE88D" shape=diamond style=filled]
+	}
+	N0 -> N1 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#81C784" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=dashed label="designs tokenomics" dir=forward]
+	N5 -> N6 [color="#388E3C" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#81C784" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#FFDA4E" penwidth=1.5 style=solid label="ensures interoperability" dir=forward]
+	N11 -> N12 [color="#81C784" penwidth=1.5 style=solid label="stakes assets" dir=forward]
+	N12 -> N13 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#81C784" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#FFDA4E" penwidth=1.5 style=dashed dir=forward]
+	N2 -> nest0_0 [color="#81C784" penwidth=1.5 style=dashed dir=forward]
+	nest0_2 -> N9 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N0 -> S0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N5 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S0 -> N6 [color="#FFDA4E" penwidth=1.5 style=dashed label="processes transactions" dir=forward]
+	N0 -> M1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N2 -> M1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N12 [color="#81C784" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_197.txt b/test/diagrams/scanned_hard/diagrams_197.txt
new file mode 100644
index 0000000000000000000000000000000000000000..d299b4896c516a92b49e4a1d0063e85a74831d3d
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_197.txt
@@ -0,0 +1,21 @@
+<Airdrop Campaigns, connectedTo, Blockchain Explorers>
+<Blockchain Explorers, designs tokenomics, Interoperability Solutions>
+<Community Building, connectedTo, KYC or AML Procedures>
+<Cross_chain Swaps, connectedTo, Cryptocurrency Education>
+<Cryptocurrency Education, connectedTo, Web3 Integration>
+<Custodial Services, connectedTo, Interoperability Solutions>
+<Custodial Services, connectedTo, Regulatory Compliance>
+<Custodial Services, connectedTo, Staking>
+<Custodial Services, processes transactions, Community Building>
+<Fraud Prevention, ensures interoperability, Lending and Borrowing Protocols>
+<Interoperability Solutions, connectedTo, Community Building>
+<KYC or AML Procedures, connectedTo, Smart Contract Auditing>
+<Lending and Borrowing Protocols, stakes assets, Staking>
+<Regulatory Compliance, connectedTo, Transaction Processing>
+<Smart Contract Auditing, connectedTo, Tax Reporting for Crypto>
+<Staking, connectedTo, Initial Exchange Offering>
+<Tax Reporting for Crypto, connectedTo, Fraud Prevention>
+<Transaction Processing, connectedTo, Airdrop Campaigns>
+<Transaction Processing, connectedTo, Cross_chain Swaps>
+<Transaction Processing, connectedTo, Staking>
+<Web3 Integration, connectedTo, Tax Reporting for Crypto>
diff --git a/test/diagrams/scanned_hard/diagrams_204.txt b/test/diagrams/scanned_hard/diagrams_204.txt
new file mode 100644
index 0000000000000000000000000000000000000000..19382f71d3484db1cde8a595af14308b24b3884d
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_204.txt
@@ -0,0 +1,18 @@
+<Agricultural IoT, connectedTo, Real_time Data Streaming>
+<Asset Tracking, automates homes, Blockchain for IoT Security>
+<Asset Tracking, connectedTo, Device Management>
+<Asset Tracking, connectedTo, Interoperability Standards>
+<Blockchain for IoT Security, designs UIs, Supply Chain Optimization>
+<Device Management, connectedTo, Agricultural IoT>
+<Device Management, predicts events, Real_time Data Streaming>
+<Device Management, prototypes devices, Healthcare IoT Devices>
+<Gateway Development, performs OTAs, Device Management>
+<Healthcare IoT Devices, connectedTo, Retail IoT>
+<Interoperability Standards, connectedTo, Remote Monitoring and Control>
+<Power Management for Devices, connectedTo, Gateway Development>
+<Real_time Data Streaming, connectedTo, Over_the_Air Updates>
+<Remote Monitoring and Control, connectedTo, Device Management>
+<Retail IoT, connectedTo, Agricultural IoT>
+<Smart Home Devices, connectedTo, Asset Tracking>
+<Smart Home Devices, updates firmware, Device Management>
+<Supply Chain Optimization, connectedTo, Power Management for Devices>
diff --git a/test/diagrams/scanned_hard/diagrams_210.dot b/test/diagrams/scanned_hard/diagrams_210.dot
new file mode 100644
index 0000000000000000000000000000000000000000..68beb93d57954c3162bffcc7f7684425aad7f275
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_210.dot
@@ -0,0 +1,43 @@
+digraph {
+	rankdir=LR
+	N0 [label="Multi_Cloud Management" color="#00BCD4" fillcolor="#B2EBF2" shape=rectangle style=filled]
+	N1 [label="Network Configuration in Cloud" color="#82DAFF" fillcolor="#C8EDFF" shape=multipledocuments style=filled]
+	N2 [label="Hybrid Cloud Deployment" color="#00BCD4" fillcolor="#B2EBF2" shape=action style=filled]
+	N3 [label="Cloud Automation" color="#6EB76D" fillcolor="#E9F7E8" shape=parallelogram style=filled]
+	N4 [label="API Management in Cloud" color="#00BCD4" fillcolor="#B2EBF2" shape=ellipse style=filled]
+	N5 [label="Resource Tagging for Cost Allocation" color="#6EB76D" fillcolor="#E9F7E8" shape=document style=filled]
+	N6 [label="Platform as a Service" color="#82DAFF" fillcolor="#C8EDFF" shape=diamond style=filled]
+	N7 [label="Database as a Service" color="#00BCD4" fillcolor="#B2EBF2" shape=diamond style=filled]
+	N8 [label="Software as a Service" color="#6EB76D" fillcolor="#E9F7E8" shape=preparation style=filled]
+	N9 [label="Auto_Scaling Configurations" color="#82DAFF" fillcolor="#C8EDFF" shape=vnode_shape style=filled]
+	N10 [label="CI or CD Pipelines in Cloud" color="#6EB76D" fillcolor="#E9F7E8" shape=hexagon style=filled]
+	S0 [label="" color="#00BCD4" fillcolor="#B2EBF2" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_DevOps on Cloud {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="DevOps on Cloud"
+		nest0_0 [label="Cloud Native Application Development" color="#82DAFF" fillcolor="#C8EDFF" shape=rectangle style=filled]
+		nest0_1 [label="Cloud Audit Trails" color="#82DAFF" fillcolor="#C8EDFF" shape=ellipse style=filled]
+		nest0_2 [label="Serverless Computing" color="#82DAFF" fillcolor="#C8EDFF" shape=document style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=solid label="develops cloud_native apps" dir=forward]
+	N1 -> N2 [color="#00BCD4" penwidth=1.5 style=solid label="architects solutions" dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#82DAFF" penwidth=1.5 style=dashed label="sets up VPNs" dir=forward]
+	N5 -> N6 [color="#6EB76D" penwidth=1.5 style=solid label="manages multi_clouds" dir=forward]
+	N6 -> N7 [color="#00BCD4" penwidth=1.5 style=dashed label="migrates workloads" dir=forward]
+	N7 -> N8 [color="#6EB76D" penwidth=1.5 style=solid label="processes big data" dir=forward]
+	N8 -> N9 [color="#00BCD4" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#82DAFF" penwidth=1.5 style=dashed label="provides IaaS" dir=forward]
+	nest0_0 -> nest0_1 [color="#82DAFF" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> nest0_2 [color="#6EB76D" penwidth=1.5 style=solid dir=forward]
+	N5 -> nest0_0 [color="#82DAFF" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> N3 [color="#00BCD4" penwidth=1.5 style=solid dir=forward]
+	N3 -> S0 [color="#6EB76D" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N7 [color="#6EB76D" penwidth=1.5 style=solid dir=forward]
+	S0 -> N6 [color="#6EB76D" penwidth=1.5 style=solid dir=forward]
+	S0 -> N8 [color="#6EB76D" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N10 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> N7 [color="#00BCD4" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_211.txt b/test/diagrams/scanned_hard/diagrams_211.txt
new file mode 100644
index 0000000000000000000000000000000000000000..4ad30b9d1a8689630b60aa0d9150f3bec275f95f
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_211.txt
@@ -0,0 +1,23 @@
+<Automation Scripting, connectedTo, Backup and Recovery Systems>
+<Backup and Recovery Systems, connectedTo, Virtual Desktop Infrastructure>
+<Cabling and Wiring, connectedTo, Backup and Recovery Systems>
+<Cabling and Wiring, connectedTo, Virtualization>
+<Cabling and Wiring, plans capacity, Monitoring and Alerting>
+<Capacity Planning, connectedTo, Virtual Desktop Infrastructure>
+<Cloud Integration with On_premise, connectedTo, Troubleshooting and Support>
+<DNS Management, connectedTo, Automation Scripting>
+<Data Center Management, connectedTo, Backup and Recovery Systems>
+<Data Center Management, connectedTo, IT Asset Management>
+<Data Center Management, monitors performance, Virtual Desktop Infrastructure>
+<Hardware Procurement, installs racks, Capacity Planning>
+<IT Asset Management, maintains hardware, DNS Management>
+<Monitoring and Alerting, connectedTo, Hardware Procurement>
+<Patch Management, connectedTo, Proxy Server Configuration>
+<Remote Access Solutions, connectedTo, Cabling and Wiring>
+<Troubleshooting and Support, connectedTo, Backup and Recovery Systems>
+<Troubleshooting and Support, connectedTo, Data Center Management>
+<Troubleshooting and Support, connectedTo, Proxy Server Configuration>
+<Troubleshooting and Support, implements disaster recovery, Patch Management>
+<Virtual Desktop Infrastructure, configures load balancers, Patch Management>
+<Virtualization, connectedTo, Backup and Recovery Systems>
+<Virtualization, connectedTo, Cloud Integration with On_premise>
diff --git a/test/diagrams/scanned_hard/diagrams_213.dot b/test/diagrams/scanned_hard/diagrams_213.dot
new file mode 100644
index 0000000000000000000000000000000000000000..35d1bc89817b03553ea14bdbaf69d2cfebca1be8
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_213.dot
@@ -0,0 +1,39 @@
+digraph {
+	rankdir=RL
+	N0 [label="Antivirus and Endpoint Protection" color="#DCE775" fillcolor="#F9FBE7" shape=parallelogram style=filled]
+	N1 [label="Hardware Procurement" color="#64B5F6" fillcolor="#E3F2FD" shape=ellipse style=filled]
+	N2 [label="Cloud Integration with On_premise" color="#FFCC80" fillcolor="#FFF0CC" shape=database style=filled]
+	N3 [label="IT Asset Management" color="#FFCC80" fillcolor="#FFF0CC" shape=document style=filled]
+	N4 [label="Hardware Maintenance" color="#64B5F6" fillcolor="#E3F2FD" shape=document style=filled]
+	N5 [label="Storage Solutions" color="#64B5F6" fillcolor="#E3F2FD" shape=action style=filled]
+	N6 [label="Server Deployment" color="#FFCC80" fillcolor="#FFF0CC" shape=hexagon style=filled]
+	N7 [label="Power and Cooling Management" color="#FFCC80" fillcolor="#FFF0CC" shape=diamond style=filled]
+	S0 [label="" color="#FFCC80" fillcolor="#FFF0CC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#FFCC80" fillcolor="#FFF0CC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Database Administration {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Database Administration"
+		nest0_0 [label="Monitoring and Alerting" color="#FFCC80" fillcolor="#FFF0CC" shape=hexagon style=filled]
+		nest0_1 [label="Network Performance Tuning" color="#64B5F6" fillcolor="#E3F2FD" shape=box style=filled]
+		nest0_2 [label="Virtual Desktop Infrastructure" color="#FFCC80" fillcolor="#FFF0CC" shape=predefinedprocess style=filled]
+	}
+	N0 -> N1 [color="#64B5F6" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#64B5F6" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#FFCC80" penwidth=1.5 style=solid label="manages users" dir=forward]
+	N2 -> nest0_0 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> S0 [color="#64B5F6" penwidth=1.5 style=solid dir=forward]
+	S0 -> N7 [color="#64B5F6" penwidth=1.5 style=solid label="manages proxies" dir=forward]
+	S0 -> N6 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	N2 -> S1 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	S1 -> N7 [color="#FFCC80" penwidth=1.5 style=dashed label="tracks assets" dir=forward]
+	S1 -> N6 [color="#64B5F6" penwidth=1.5 style=solid dir=forward]
+	S1 -> N4 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_215.dot b/test/diagrams/scanned_hard/diagrams_215.dot
new file mode 100644
index 0000000000000000000000000000000000000000..9aa8909c22a79fcf553ee415a2336fa83ef210e8
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_215.dot
@@ -0,0 +1,48 @@
+digraph {
+	rankdir=TB
+	N0 [label="Canary Releases" color="#CB9BE1" fillcolor="#F2E6F5" shape=multipledocuments style=filled]
+	N1 [label="Feedback Loops" color="#CB9BE1" fillcolor="#F2E6F5" shape=action style=filled]
+	N2 [label="Post_Mortem Analysis" color="#CB9BE1" fillcolor="#F2E6F5" shape=rectangle style=filled]
+	N3 [label="Monitoring and Logging" color="#4DD0E1" fillcolor="#C9F0F0" shape=diamond style=filled]
+	N4 [label="Continuous Integration" color="#73C6BC" fillcolor="#D0EFEE" shape=ellipse style=filled]
+	N5 [label="Continuous Delivery" color="#73C6BC" fillcolor="#D0EFEE" shape=multipledocuments style=filled]
+	N6 [label="Automated Deployment" color="#CB9BE1" fillcolor="#F2E6F5" shape=inputoutput style=filled]
+	N7 [label="Observability Implementation" color="#4DD0E1" fillcolor="#C9F0F0" shape=document style=filled]
+	N8 [label="Static Code Analysis" color="#CB9BE1" fillcolor="#F2E6F5" shape=box style=filled]
+	N9 [label="Dynamic Application Security Testing" color="#CB9BE1" fillcolor="#F2E6F5" shape=parallelogram style=filled]
+	N10 [label="Automated Rollbacks" color="#73C6BC" fillcolor="#D0EFEE" shape=rect style=filled]
+	N11 [label="GitOps" color="#CB9BE1" fillcolor="#F2E6F5" shape=diamond style=filled]
+	S1 [label="" color="#73C6BC" fillcolor="#D0EFEE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#73C6BC" fillcolor="#D0EFEE" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#4DD0E1" fillcolor="#C9F0F0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Serverless Deployment {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Serverless Deployment"
+		nest0_0 [label="Version Control" color="#4DD0E1" fillcolor="#C9F0F0" shape=predefinedprocess style=filled]
+		nest0_1 [label="Blue_Green Deployments" color="#CB9BE1" fillcolor="#F2E6F5" shape=box style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=dashed label="implements SRE" dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#4DD0E1" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#4DD0E1" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#CB9BE1" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#73C6BC" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#4DD0E1" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#73C6BC" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#73C6BC" penwidth=1.5 style=solid label="manages environments" dir=forward]
+	N9 -> N10 [color="#CB9BE1" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#4DD0E1" penwidth=1.5 style=solid label="performs rollbacks" dir=forward]
+	nest0_0 -> nest0_1 [color="#CB9BE1" penwidth=1.5 style=solid label="uses GitOps" dir=forward]
+	N3 -> nest0_0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> N11 [color="#73C6BC" penwidth=1.5 style=dashed label="collects metrics" dir=forward]
+	N7 -> S1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S1 -> N10 [color="#CB9BE1" penwidth=1.5 style=dashed label="accelerates delivery" dir=forward]
+	S1 -> N9 [color="#CB9BE1" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M0 [color="#73C6BC" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M0 [color="#4DD0E1" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N3 [color="#4DD0E1" penwidth=1.5 style=solid dir=forward]
+	N1 -> M1 [color="#CB9BE1" penwidth=1.5 style=dashed label="automates operations" dir=forward]
+	N5 -> M1 [color="#73C6BC" penwidth=1.5 style=solid dir=forward]
+	M1 -> N9 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_216.dot b/test/diagrams/scanned_hard/diagrams_216.dot
new file mode 100644
index 0000000000000000000000000000000000000000..8d34844882b4971096ac837becffb3befdbb51e1
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_216.dot
@@ -0,0 +1,54 @@
+digraph {
+	rankdir=LR
+	N0 [label="Cost Optimization in Cloud DevOps" color="#AED581" fillcolor="#F0F4C3" shape=box style=filled]
+	N1 [label="Containerization" color="#C0CA33" fillcolor="#F9FBE7" shape=ellipse style=filled]
+	N2 [label="Security in DevOps" color="#C0CA33" fillcolor="#F9FBE7" shape=document style=filled]
+	N3 [label="Alerting and Incident Response" color="#AED581" fillcolor="#F0F4C3" shape=inputoutput style=filled]
+	N4 [label="Container Orchestration" color="#AED581" fillcolor="#F0F4C3" shape=predefinedprocess style=filled]
+	N5 [label="GitOps" color="#AED581" fillcolor="#F0F4C3" shape=rect style=filled]
+	N6 [label="Site Reliability Engineering Principles" color="#C0CA33" fillcolor="#F9FBE7" shape=vnode_shape style=filled]
+	N7 [label="Automated Rollbacks" color="#AED581" fillcolor="#F0F4C3" shape=inputoutput style=filled]
+	N8 [label="Immutable Infrastructure" color="#C0CA33" fillcolor="#F9FBE7" shape=preparation style=filled]
+	N9 [label="Configuration Management" color="#A188DB" fillcolor="#DED7F0" shape=database style=filled]
+	N10 [label="Code Quality Checks" color="#AED581" fillcolor="#F0F4C3" shape=hexagon style=filled]
+	N11 [label="Feedback Loops" color="#C0CA33" fillcolor="#F9FBE7" shape=preparation style=filled]
+	N12 [label="Canary Releases" color="#AED581" fillcolor="#F0F4C3" shape=ellipse style=filled]
+	N13 [label="Monitoring and Logging" color="#A188DB" fillcolor="#DED7F0" shape=action style=filled]
+	N14 [label="Continuous Delivery" color="#A188DB" fillcolor="#DED7F0" shape=parallelogram style=filled]
+	N15 [label="Continuous Integration" color="#A188DB" fillcolor="#DED7F0" shape=action style=filled]
+	S0 [label="" color="#C0CA33" fillcolor="#F9FBE7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#AED581" fillcolor="#F0F4C3" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Infrastructure Provisioning {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Infrastructure Provisioning"
+		nest0_0 [label="Post_Mortem Analysis" color="#AED581" fillcolor="#F0F4C3" shape=multipledocuments style=filled]
+		nest0_1 [label="Collaboration Tools" color="#C0CA33" fillcolor="#F9FBE7" shape=rect style=filled]
+	}
+	N0 -> N1 [color="#A188DB" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#C0CA33" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#A188DB" penwidth=1.5 style=solid label="deploys canaries" dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=solid label="implements SRE" dir=forward]
+	N4 -> N5 [color="#AED581" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#A188DB" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#C0CA33" penwidth=1.5 style=solid label="manages versions" dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#C0CA33" penwidth=1.5 style=dashed dir=forward]
+	N10 -> N11 [color="#AED581" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#000000" penwidth=1.5 style=dashed label="orchestrates containers" dir=forward]
+	N12 -> N13 [color="#C0CA33" penwidth=1.5 style=solid dir=forward]
+	N13 -> N14 [color="#C0CA33" penwidth=1.5 style=solid dir=forward]
+	N14 -> N15 [color="#C0CA33" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#A188DB" penwidth=1.5 style=dashed dir=forward]
+	N9 -> nest0_0 [color="#AED581" penwidth=1.5 style=dashed label="builds cloud_native apps" dir=forward]
+	nest0_1 -> N10 [color="#000000" penwidth=1.5 style=solid label="performs static analysis" dir=forward]
+	N6 -> S0 [color="#AED581" penwidth=1.5 style=solid dir=forward]
+	S0 -> N11 [color="#C0CA33" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N13 [color="#C0CA33" penwidth=1.5 style=solid dir=forward]
+	S0 -> N10 [color="#C0CA33" penwidth=1.5 style=solid dir=forward]
+	N3 -> M0 [color="#A188DB" penwidth=1.5 style=solid dir=forward]
+	N0 -> M0 [color="#C0CA33" penwidth=1.5 style=solid dir=forward]
+	N2 -> M0 [color="#000000" penwidth=1.5 style=solid label="practices chaos engineering" dir=forward]
+	M0 -> N5 [color="#A188DB" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_22.txt b/test/diagrams/scanned_hard/diagrams_22.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c41ad18828f7aa309b41dd7c29aae4d0d687457e
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_22.txt
@@ -0,0 +1,9 @@
+<Dark Web Monitoring, connectedTo, Risk Management Framework>
+<Data Loss Prevention, authorizes, Dark Web Monitoring>
+<Data Loss Prevention, connectedTo, Security Operations Center Monitoring>
+<IoT Security, consults, Intrusion Prevention>
+<Phishing Simulation, connectedTo, IoT Security>
+<Risk Management Framework, advises, Security Operations Center Monitoring>
+<Security Operations Center Monitoring, forensics, Data Loss Prevention>
+<Security Operations Center Monitoring, mitigates, Phishing Simulation>
+<Zero Trust Architecture, connectedTo, Data Loss Prevention>
diff --git a/test/diagrams/scanned_hard/diagrams_223.dot b/test/diagrams/scanned_hard/diagrams_223.dot
new file mode 100644
index 0000000000000000000000000000000000000000..f484bc30900980e3b5691a1f3377c079024d1a2e
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_223.dot
@@ -0,0 +1,47 @@
+digraph {
+	rankdir=RL
+	N0 [label="Push Notification Implementation" color="#FF5722" fillcolor="#FFCCBC" shape=diamond style=filled]
+	N1 [label="IoT Device Control via App" color="#FFC107" fillcolor="#FFECB3" shape=rect style=filled]
+	N2 [label="Database Design for Mobile" color="#FFC107" fillcolor="#FFECB3" shape=inputoutput style=filled]
+	N3 [label="Concept Development" color="#FF5722" fillcolor="#FFCCBC" shape=multipledocuments style=filled]
+	N4 [label="Prototyping" color="#2196F3" fillcolor="#BBDEFB" shape=vnode_shape style=filled]
+	N5 [label="Gamification Elements" color="#2196F3" fillcolor="#BBDEFB" shape=diamond style=filled]
+	N6 [label="Wearable Device Integration" color="#FFC107" fillcolor="#FFECB3" shape=predefinedprocess style=filled]
+	N7 [label="App Store Optimization" color="#2196F3" fillcolor="#BBDEFB" shape=inputoutput style=filled]
+	N8 [label="User Experience Design" color="#FF5722" fillcolor="#FFCCBC" shape=box style=filled]
+	N9 [label="User Interface Design" color="#FFC107" fillcolor="#FFECB3" shape=diamond style=filled]
+	N10 [label="Security Implementation" color="#FFC107" fillcolor="#FFECB3" shape=diamond style=filled]
+	N11 [label="API Development" color="#FFC107" fillcolor="#FFECB3" shape=vnode_shape style=filled]
+	N12 [label="Offline Mode Development" color="#2196F3" fillcolor="#BBDEFB" shape=vnode_shape style=filled]
+	S0 [label="" color="#FF5722" fillcolor="#FFCCBC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#FFC107" fillcolor="#FFECB3" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Chat Functionality {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Chat Functionality"
+		nest0_0 [label="AR or VR Features in Mobile" color="#FF5722" fillcolor="#FFCCBC" shape=inputoutput style=filled]
+		nest0_1 [label="User Onboarding Flows" color="#FF5722" fillcolor="#FFCCBC" shape=preparation style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#2196F3" penwidth=1.5 style=solid label="deploys to stores" dir=forward]
+	N3 -> N4 [color="#2196F3" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#FFC107" penwidth=1.5 style=dashed label="analyzes analytics" dir=forward]
+	N6 -> N7 [color="#2196F3" penwidth=1.5 style=dashed label="integrates wearables" dir=forward]
+	N7 -> N8 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#FF5722" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#000000" penwidth=1.5 style=solid label="implements notifications" dir=forward]
+	N10 -> N11 [color="#FFC107" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#FF5722" penwidth=1.5 style=solid label="designs UIs" dir=forward]
+	N3 -> nest0_0 [color="#2196F3" penwidth=1.5 style=dashed label="manages permissions" dir=forward]
+	nest0_1 -> N3 [color="#FFC107" penwidth=1.5 style=solid label="uses microphone" dir=forward]
+	N9 -> S0 [color="#FF5722" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N12 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S0 -> N11 [color="#2196F3" penwidth=1.5 style=solid dir=forward]
+	N4 -> M0 [color="#FFC107" penwidth=1.5 style=dashed label="implements security" dir=forward]
+	N1 -> M0 [color="#FF5722" penwidth=1.5 style=solid dir=forward]
+	N5 -> M0 [color="#FFC107" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N8 [color="#FF5722" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_224.dot b/test/diagrams/scanned_hard/diagrams_224.dot
new file mode 100644
index 0000000000000000000000000000000000000000..d6ada0e0aabb5ae09bb6b2e2e293edb84dc888ff
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_224.dot
@@ -0,0 +1,44 @@
+digraph {
+	rankdir=LR
+	N0 [label="IoT Device Control via App" color="#FFE69C" fillcolor="#FFF9D4" shape=vnode_shape style=filled]
+	N1 [label="Testing and Debugging" color="#FF9800" fillcolor="#FFE0B2" shape=rectangle style=filled]
+	N2 [label="AR or VR Features in Mobile" color="#5C6BC0" fillcolor="#E8EAF6" shape=ellipse style=filled]
+	N3 [label="Chat Functionality" color="#FF9800" fillcolor="#FFE0B2" shape=multipledocuments style=filled]
+	N4 [label="Analytics Tracking" color="#FF9800" fillcolor="#FFE0B2" shape=multipledocuments style=filled]
+	N5 [label="Biometric Authentication" color="#FF9800" fillcolor="#FFE0B2" shape=multipledocuments style=filled]
+	N6 [label="Camera Integration" color="#FFE69C" fillcolor="#FFF9D4" shape=vnode_shape style=filled]
+	N7 [label="Security Implementation" color="#FFE69C" fillcolor="#FFF9D4" shape=inputoutput style=filled]
+	N8 [label="Updates and Maintenance" color="#5C6BC0" fillcolor="#E8EAF6" shape=diamond style=filled]
+	N9 [label="User Feedback Collection" color="#5C6BC0" fillcolor="#E8EAF6" shape=box style=filled]
+	S0 [label="" color="#5C6BC0" fillcolor="#E8EAF6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#FFE69C" fillcolor="#FFF9D4" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Subscription Management {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Subscription Management"
+		nest0_0 [label="Accessibility Features" color="#FFE69C" fillcolor="#FFF9D4" shape=database style=filled]
+		nest0_1 [label="Wireframing" color="#FF9800" fillcolor="#FFE0B2" shape=ellipse style=filled]
+		nest0_2 [label="Database Design for Mobile" color="#FFE69C" fillcolor="#FFF9D4" shape=inputoutput style=filled]
+		nest0_3 [label="Native App Development" color="#FF9800" fillcolor="#FFE0B2" shape=document style=filled]
+	}
+	N0 -> N1 [color="#5C6BC0" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#5C6BC0" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#FF9800" penwidth=1.5 style=dashed label="optimizes performance" dir=forward]
+	N3 -> N4 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#5C6BC0" penwidth=1.5 style=solid label="integrates in_app purchases" dir=forward]
+	nest0_1 -> nest0_2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_2 -> nest0_3 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N6 -> nest0_0 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	nest0_3 -> N1 [color="#5C6BC0" penwidth=1.5 style=dashed label="concepts ideas" dir=forward]
+	N5 -> S0 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N9 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N7 [color="#FF9800" penwidth=1.5 style=solid label="implements biometrics" dir=forward]
+	N2 -> M1 [color="#000000" penwidth=1.5 style=dashed label="designs onboarding" dir=forward]
+	N1 -> M1 [color="#5C6BC0" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N7 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_227.txt b/test/diagrams/scanned_hard/diagrams_227.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7366e3a16703915f409acb4f744095100ec6e059
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_227.txt
@@ -0,0 +1,18 @@
+<Brand Voice Development, connectedTo, Scheduling Posts>
+<Competitor Analysis, connectedTo, Emerging Platform Exploration>
+<Content Creation, engages audiences, Hashtag Research>
+<Crisis Management, connectedTo, Reputation Management>
+<Emerging Platform Exploration, connectedTo, Crisis Management>
+<Emerging Platform Exploration, connectedTo, Engagement Rate Calculation>
+<Emerging Platform Exploration, connectedTo, Reels or Short Video Production>
+<Emerging Platform Exploration, connectedTo, Scheduling Posts>
+<Emerging Platform Exploration, moderates comments, Ethical Use of Social Media>
+<Ethical Use of Social Media, connectedTo, User_Generated Content Curation>
+<Hashtag Research, connectedTo, Platform Selection>
+<Platform Selection, connectedTo, Reels or Short Video Production>
+<Reels or Short Video Production, connectedTo, Brand Voice Development>
+<Reputation Management, connectedTo, Content Creation>
+<Reputation Management, connectedTo, Platform Selection>
+<Reputation Management, connectedTo, Scheduling Posts>
+<Scheduling Posts, selects platforms, Engagement Rate Calculation>
+<User_Generated Content Curation, manages crises, Engagement Rate Calculation>
diff --git a/test/diagrams/scanned_hard/diagrams_231.dot b/test/diagrams/scanned_hard/diagrams_231.dot
new file mode 100644
index 0000000000000000000000000000000000000000..8501f0cbd9ccce72b179f052d927dbfa7cbb5c66
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_231.dot
@@ -0,0 +1,37 @@
+digraph {
+	rankdir=LR
+	N0 [label="Site Architecture Optimization" color="#BDBDBD" fillcolor="#F5F5F5" shape=action style=filled]
+	N1 [label="News Search" color="#3F51B5" fillcolor="#C5CAE9" shape=hexagon style=filled]
+	N2 [label="Core Web Vitals Optimization" color="#3F51B5" fillcolor="#C5CAE9" shape=box style=filled]
+	N3 [label="Keyword Research" color="#3F51B5" fillcolor="#C5CAE9" shape=hexagon style=filled]
+	N4 [label="Video Search" color="#90A4AE" fillcolor="#ECEFF1" shape=box style=filled]
+	N5 [label="Technical SEO" color="#BDBDBD" fillcolor="#F5F5F5" shape=action style=filled]
+	N6 [label="Content Quality Assessment" color="#90A4AE" fillcolor="#ECEFF1" shape=ellipse style=filled]
+	S1 [label="" color="#90A4AE" fillcolor="#ECEFF1" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#90A4AE" fillcolor="#ECEFF1" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Penalties Recovery {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Penalties Recovery"
+		nest0_0 [label="Local SEO" color="#BDBDBD" fillcolor="#F5F5F5" shape=rect style=filled]
+		nest0_1 [label="Shopping Search" color="#90A4AE" fillcolor="#ECEFF1" shape=diamond style=filled]
+		nest0_2 [label="Search Console Management" color="#3F51B5" fillcolor="#C5CAE9" shape=action style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=dashed label="indexes content" dir=forward]
+	N1 -> N2 [color="#90A4AE" penwidth=1.5 style=solid label="uses schema markup" dir=forward]
+	N2 -> N3 [color="#90A4AE" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#BDBDBD" penwidth=1.5 style=solid label="understands intent" dir=forward]
+	N4 -> N5 [color="#3F51B5" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#90A4AE" penwidth=1.5 style=solid label="handles negative SEO" dir=forward]
+	nest0_0 -> nest0_1 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> nest0_2 [color="#3F51B5" penwidth=1.5 style=solid dir=forward]
+	N2 -> nest0_0 [color="#90A4AE" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> N2 [color="#3F51B5" penwidth=1.5 style=solid dir=forward]
+	N0 -> S1 [color="#90A4AE" penwidth=1.5 style=solid dir=forward]
+	S1 -> N6 [color="#000000" penwidth=1.5 style=solid label="handles voice search" dir=forward]
+	S1 -> N5 [color="#3F51B5" penwidth=1.5 style=solid label="manages GMB" dir=forward]
+	S1 -> N3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M0 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M0 [color="#3F51B5" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N4 [color="#90A4AE" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_232.dot b/test/diagrams/scanned_hard/diagrams_232.dot
new file mode 100644
index 0000000000000000000000000000000000000000..5d2157a8717c2479fc6837af25fd8a8b660dff43
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_232.dot
@@ -0,0 +1,44 @@
+digraph {
+	rankdir=LR
+	N0 [label="Multi_Factor Authentication" color="#DCE775" fillcolor="#FCFCE7" shape=rectangle style=filled]
+	N1 [label="Data Encryption for Identity" color="#FFF9AE" fillcolor="#FFFCE6" shape=parallelogram style=filled]
+	N2 [label="Password Management" color="#BDAFA8" fillcolor="#E4E0DF" shape=action style=filled]
+	N3 [label="Social Login Integration" color="#BDAFA8" fillcolor="#E4E0DF" shape=hexagon style=filled]
+	N4 [label="Identity as a Service" color="#BDAFA8" fillcolor="#E4E0DF" shape=predefinedprocess style=filled]
+	N5 [label="Risk_Based Authentication" color="#FFF9AE" fillcolor="#FFFCE6" shape=vnode_shape style=filled]
+	N6 [label="Identity Threat Detection and Response" color="#BDAFA8" fillcolor="#E4E0DF" shape=database style=filled]
+	N7 [label="Compliance with Data Protection Regulations" color="#BDAFA8" fillcolor="#E4E0DF" shape=action style=filled]
+	N8 [label="Digital Certificates" color="#DCE775" fillcolor="#FCFCE7" shape=rectangle style=filled]
+	S0 [label="" color="#FFF9AE" fillcolor="#FFFCE6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#DCE775" fillcolor="#FCFCE7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#FFF9AE" fillcolor="#FFFCE6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Identity Lifecycle Management {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Identity Lifecycle Management"
+		nest0_0 [label="Decentralized Identifiers" color="#BDAFA8" fillcolor="#E4E0DF" shape=box style=filled]
+		nest0_1 [label="Non_Repudiation" color="#DCE775" fillcolor="#FCFCE7" shape=database style=filled]
+		nest0_2 [label="Workforce Identity Management" color="#FFF9AE" fillcolor="#FFFCE6" shape=hexagon style=filled]
+	}
+	N0 -> N1 [color="#BDAFA8" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#FFF9AE" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=solid label="uses digital signatures" dir=forward]
+	N4 -> N5 [color="#BDAFA8" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#FFF9AE" penwidth=1.5 style=dashed label="creates portable identities" dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=solid label="provides verifiable proofs" dir=forward]
+	nest0_0 -> nest0_1 [color="#FFF9AE" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> nest0_2 [color="#BDAFA8" penwidth=1.5 style=solid label="implements adaptive authentication" dir=forward]
+	N1 -> nest0_0 [color="#BDAFA8" penwidth=1.5 style=dashed dir=forward]
+	nest0_2 -> N4 [color="#FFF9AE" penwidth=1.5 style=solid label="enables MFA" dir=forward]
+	N4 -> S0 [color="#FFF9AE" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N6 [color="#DCE775" penwidth=1.5 style=dashed label="uses biometrics" dir=forward]
+	N1 -> S1 [color="#BDAFA8" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N7 [color="#000000" penwidth=1.5 style=solid label="protects data" dir=forward]
+	S1 -> N4 [color="#FFF9AE" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M0 [color="#FFF9AE" penwidth=1.5 style=dashed dir=forward]
+	N5 -> M0 [color="#FFF9AE" penwidth=1.5 style=solid label="performs KYCs" dir=forward]
+	M0 -> N8 [color="#BDAFA8" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_232.txt b/test/diagrams/scanned_hard/diagrams_232.txt
new file mode 100644
index 0000000000000000000000000000000000000000..11f5021abc5f674d56a0100101123d8cbe86a786
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_232.txt
@@ -0,0 +1,18 @@
+<Compliance with Data Protection Regulations, provides verifiable proofs, Digital Certificates>
+<Data Encryption for Identity, connectedTo, Decentralized Identifiers>
+<Data Encryption for Identity, connectedTo, Identity as a Service>
+<Data Encryption for Identity, connectedTo, Password Management>
+<Data Encryption for Identity, protects data, Compliance with Data Protection Regulations>
+<Decentralized Identifiers, connectedTo, Non_Repudiation>
+<Identity Threat Detection and Response, creates portable identities, Compliance with Data Protection Regulations>
+<Identity as a Service, connectedTo, Compliance with Data Protection Regulations>
+<Identity as a Service, connectedTo, Risk_Based Authentication>
+<Identity as a Service, uses biometrics, Identity Threat Detection and Response>
+<Multi_Factor Authentication, connectedTo, Data Encryption for Identity>
+<Multi_Factor Authentication, connectedTo, Digital Certificates>
+<Non_Repudiation, implements adaptive authentication, Workforce Identity Management>
+<Password Management, connectedTo, Social Login Integration>
+<Risk_Based Authentication, connectedTo, Identity Threat Detection and Response>
+<Risk_Based Authentication, performs KYCs, Digital Certificates>
+<Social Login Integration, uses digital signatures, Identity as a Service>
+<Workforce Identity Management, enables MFA, Identity as a Service>
diff --git a/test/diagrams/scanned_hard/diagrams_233.dot b/test/diagrams/scanned_hard/diagrams_233.dot
new file mode 100644
index 0000000000000000000000000000000000000000..717d648d46eed7f39d5ba652f85e0a8de218f7db
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_233.dot
@@ -0,0 +1,41 @@
+digraph {
+	rankdir=TB
+	N0 [label="User Registration" color="#FFB74D" fillcolor="#FFF3E0" shape=hexagon style=filled]
+	N1 [label="Privacy Management" color="#FFB74D" fillcolor="#FFF3E0" shape=hexagon style=filled]
+	N2 [label="Password Management" color="#FFB74D" fillcolor="#FFF3E0" shape=database style=filled]
+	N3 [label="API Security for Identity" color="#BCB88A" fillcolor="#F5F5DC" shape=parallelogram style=filled]
+	N4 [label="Identity Threat Detection and Response" color="#BCB88A" fillcolor="#F5F5DC" shape=vnode_shape style=filled]
+	N5 [label="Blockchain_based Identity" color="#BCB88A" fillcolor="#F5F5DC" shape=database style=filled]
+	N6 [label="Consent Management" color="#FFB74D" fillcolor="#FFF3E0" shape=rect style=filled]
+	N7 [label="Customer Identity and Access Management" color="#BCB88A" fillcolor="#F5F5DC" shape=database style=filled]
+	N8 [label="Risk_Based Authentication" color="#FFB74D" fillcolor="#FFF3E0" shape=predefinedprocess style=filled]
+	S0 [label="" color="#FFE69C" fillcolor="#FFF9D4" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#FFE69C" fillcolor="#FFF9D4" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Multi_Factor Authentication {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Multi_Factor Authentication"
+		nest0_0 [label="Identity Lifecycle Management" color="#FFB74D" fillcolor="#FFF3E0" shape=diamond style=filled]
+		nest0_1 [label="Decentralized Identifiers" color="#FFB74D" fillcolor="#FFF3E0" shape=rectangle style=filled]
+		nest0_2 [label="Biometric Authentication" color="#FFE69C" fillcolor="#FFF9D4" shape=vnode_shape style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#FFB74D" penwidth=1.5 style=solid label="ensures privacy" dir=forward]
+	N2 -> N3 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#FFB74D" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#FFE69C" penwidth=1.5 style=solid label="issues certificates" dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#BCB88A" penwidth=1.5 style=dashed label="ensures non_repudiation" dir=forward]
+	nest0_0 -> nest0_1 [color="#BCB88A" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> nest0_2 [color="#BCB88A" penwidth=1.5 style=dashed dir=forward]
+	N6 -> nest0_0 [color="#FFE69C" penwidth=1.5 style=dashed label="manages wallets" dir=forward]
+	nest0_2 -> N1 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	N4 -> S0 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N8 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N7 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	N1 -> M1 [color="#FFE69C" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M1 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	N2 -> M1 [color="#FFB74D" penwidth=1.5 style=solid label="provisions users" dir=forward]
+	M1 -> N5 [color="#000000" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_236.txt b/test/diagrams/scanned_hard/diagrams_236.txt
new file mode 100644
index 0000000000000000000000000000000000000000..cdfaf25ae56a9a076aedbaa2004d1c1572cb4888
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_236.txt
@@ -0,0 +1,18 @@
+<AI in Online Education, develops platforms, Discussion Forum Moderation>
+<Accessibility Features, connectedTo, Interactive Learning Activities>
+<Asynchronous Learning, connectedTo, Certification Issuance>
+<Blended Learning Models, applies learning design, Learning Analytics>
+<Blended Learning Models, connectedTo, Feedback and Grading>
+<Certification Issuance, connectedTo, Discussion Forum Moderation>
+<Certification Issuance, connectedTo, Language Learning Platforms>
+<Certification Issuance, connectedTo, Student Progress Tracking>
+<Feedback and Grading, manages enrollments, Student Engagement Strategies>
+<Feedback and Grading, uses adaptive systems, Learning Analytics>
+<Interactive Learning Activities, connectedTo, Student Engagement Strategies>
+<Language Learning Platforms, connectedTo, AI in Online Education>
+<Learning Analytics, connectedTo, Asynchronous Learning>
+<Micro_credential Programs, connectedTo, Accessibility Features>
+<Online Tutoring, connectedTo, Learning Analytics>
+<Student Engagement Strategies, connectedTo, Online Tutoring>
+<Student Engagement Strategies, supports SEL, Micro_credential Programs>
+<Student Progress Tracking, connectedTo, Language Learning Platforms>
diff --git a/test/diagrams/scanned_hard/diagrams_238.txt b/test/diagrams/scanned_hard/diagrams_238.txt
new file mode 100644
index 0000000000000000000000000000000000000000..8e27aceeec66c188465b8180673f124f32428084
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_238.txt
@@ -0,0 +1,22 @@
+<Course Audit Options, connectedTo, Learner Feedback Analysis>
+<Course Audit Options, connectedTo, Micro_credential Stacking>
+<Course Retirement Planning, hosts platforms, Self_Paced Learning Tracks>
+<Engagement Metrics Tracking, connectedTo, Instructor Recruitment for MOOCs>
+<Financial Aid for Learners, connectedTo, Course Retirement Planning>
+<Financial Aid for Learners, translates content, Learner Analytics>
+<Instructor Recruitment for MOOCs, connectedTo, Self_Paced Learning Tracks>
+<Learner Analytics, connectedTo, Engagement Metrics Tracking>
+<Learner Feedback Analysis, collaborates with experts, Marketing to Global Audience>
+<Learner Support, issues statements of accomplishment, Skill_Based Learning Outcomes>
+<Marketing to Global Audience, innovates pedagogy, Financial Aid for Learners>
+<Micro_credential Stacking, connectedTo, Mobile Learning Experience>
+<Mobile Learning Experience, connectedTo, Course Content Development>
+<Mobile Learning Experience, connectedTo, Verified Track Management>
+<Self_Paced Learning Tracks, connectedTo, Course Content Development>
+<Skill_Based Learning Outcomes, provides accessibility, Specialization or Professional Certificate Programs>
+<Specialization or Professional Certificate Programs, connectedTo, Course Content Development>
+<Specialization or Professional Certificate Programs, personalizes learning, Learner Feedback Analysis>
+<Technical Infrastructure for Scale, analyzes data, Learner Feedback Analysis>
+<Technical Infrastructure for Scale, connectedTo, Course Content Development>
+<Technical Infrastructure for Scale, connectedTo, Learner Support>
+<Verified Track Management, connectedTo, Technical Infrastructure for Scale>
diff --git a/test/diagrams/scanned_hard/diagrams_241.dot b/test/diagrams/scanned_hard/diagrams_241.dot
new file mode 100644
index 0000000000000000000000000000000000000000..a8c3233897e2364df54827a37bd45f923dbce775
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_241.dot
@@ -0,0 +1,73 @@
+digraph {
+	rankdir=RL
+	N0 [label="Fraud Check" color="#4285F4" fillcolor="#D0E0F8" shape=parallelogram style=filled]
+	N1 [label="Credit Card Application" color="#FFA726" fillcolor="#FFF3E0" shape=multipledocuments style=filled]
+	N2 [label="Investment Planning" color="#F7BEE0" fillcolor="#FAEBF3" shape=predefinedprocess style=filled]
+	N3 [label="Fund Disbursement" color="#F7BEE0" fillcolor="#FAEBF3" shape=diamond style=filled]
+	N4 [label="KYC Validation" color="#F7BEE0" fillcolor="#FAEBF3" shape=parallelogram style=filled]
+	N5 [label="Risk Assessment" color="#F7BEE0" fillcolor="#FAEBF3" shape=box style=filled]
+	N6 [label="Merger and Acquisition" color="#FFA726" fillcolor="#FFF3E0" shape=multipledocuments style=filled]
+	N7 [label="Cryptocurrency Exchange" color="#4285F4" fillcolor="#D0E0F8" shape=predefinedprocess style=filled]
+	N8 [label="Wealth Management" color="#4285F4" fillcolor="#D0E0F8" shape=vnode_shape style=filled]
+	N9 [label="Interest Calculation" color="#4285F4" fillcolor="#D0E0F8" shape=database style=filled]
+	N10 [label="Compliance Review" color="#FFA726" fillcolor="#FFF3E0" shape=document style=filled]
+	N11 [label="Venture Capital Funding" color="#FFA726" fillcolor="#FFF3E0" shape=vnode_shape style=filled]
+	N12 [label="Dispute Resolution" color="#F7BEE0" fillcolor="#FAEBF3" shape=parallelogram style=filled]
+	N13 [label="Blockchain Verification" color="#FFA726" fillcolor="#FFF3E0" shape=parallelogram style=filled]
+	N14 [label="Asset Management" color="#4285F4" fillcolor="#D0E0F8" shape=parallelogram style=filled]
+	S0 [label="" color="#FFA726" fillcolor="#FFF3E0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#F7BEE0" fillcolor="#FAEBF3" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#4285F4" fillcolor="#D0E0F8" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Account Closure {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Account Closure"
+		nest0_0 [label="Underwriting" color="#F7BEE0" fillcolor="#FAEBF3" shape=parallelogram style=filled]
+		nest0_1 [label="Securities Trading" color="#4285F4" fillcolor="#D0E0F8" shape=vnode_shape style=filled]
+		nest0_2 [label="Credit Scoring" color="#4285F4" fillcolor="#D0E0F8" shape=box style=filled]
+	}
+	subgraph cluster_Collateral Evaluation {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Collateral Evaluation"
+		nest1_0 [label="Mortgage Application" color="#F7BEE0" fillcolor="#FAEBF3" shape=rectangle style=filled]
+		nest1_1 [label="Debt Collection" color="#4285F4" fillcolor="#D0E0F8" shape=rectangle style=filled]
+		nest1_2 [label="Transaction Logging" color="#FFA726" fillcolor="#FFF3E0" shape=diamond style=filled]
+		nest1_3 [label="Financial Advisory" color="#FFA726" fillcolor="#FFF3E0" shape=parallelogram style=filled]
+	}
+	N0 -> N1 [color="#F7BEE0" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=solid label="evaluates" dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#F7BEE0" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#F7BEE0" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#F7BEE0" penwidth=1.5 style=dashed dir=forward]
+	N10 -> N11 [color="#4285F4" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#4285F4" penwidth=1.5 style=dashed dir=forward]
+	N12 -> N13 [color="#FFA726" penwidth=1.5 style=solid dir=forward]
+	N13 -> N14 [color="#4285F4" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#FFA726" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#F7BEE0" penwidth=1.5 style=dashed label="verifies" dir=forward]
+	N13 -> nest0_0 [color="#F7BEE0" penwidth=1.5 style=dashed dir=forward]
+	nest0_2 -> N1 [color="#4285F4" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#4285F4" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> nest1_2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> nest1_3 [color="#4285F4" penwidth=1.5 style=solid dir=forward]
+	N7 -> nest1_0 [color="#4285F4" penwidth=1.5 style=solid dir=forward]
+	nest1_3 -> N9 [color="#FFA726" penwidth=1.5 style=dashed dir=forward]
+	N6 -> S0 [color="#F7BEE0" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N11 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N9 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> M0 [color="#F7BEE0" penwidth=1.5 style=solid dir=forward]
+	N0 -> M0 [color="#4285F4" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M0 [color="#FFA726" penwidth=1.5 style=solid dir=forward]
+	N2 -> M0 [color="#F7BEE0" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N5 [color="#FFA726" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M1 [color="#F7BEE0" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M1 [color="#4285F4" penwidth=1.5 style=solid dir=forward]
+	N1 -> M1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N4 [color="#4285F4" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_245.dot b/test/diagrams/scanned_hard/diagrams_245.dot
new file mode 100644
index 0000000000000000000000000000000000000000..961b211dbda2bc6bb1d05f7a52fdbc0b5bc750d4
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_245.dot
@@ -0,0 +1,64 @@
+digraph {
+	rankdir=BT
+	N0 [label="Product Listing" color="#9575CD" fillcolor="#EDE7F6" shape=rectangle style=filled]
+	N1 [label="Invoice Generation" color="#F44336" fillcolor="#FFCDD2" shape=document style=filled]
+	N2 [label="Affiliate Marketing" color="#F44336" fillcolor="#FFCDD2" shape=ellipse style=filled]
+	N3 [label="Customer Inquiry" color="#EAEFA5" fillcolor="#FDFCEB" shape=multipledocuments style=filled]
+	N4 [label="Product Recommendation" color="#9575CD" fillcolor="#EDE7F6" shape=predefinedprocess style=filled]
+	N5 [label="Mobile App Interaction" color="#9575CD" fillcolor="#EDE7F6" shape=hexagon style=filled]
+	N6 [label="Fraud Detection" color="#EAEFA5" fillcolor="#FDFCEB" shape=box style=filled]
+	N7 [label="Add to Cart" color="#EAEFA5" fillcolor="#FDFCEB" shape=ellipse style=filled]
+	N8 [label="Subscription Service" color="#9575CD" fillcolor="#EDE7F6" shape=predefinedprocess style=filled]
+	N9 [label="Delivery Tracking" color="#EAEFA5" fillcolor="#FDFCEB" shape=vnode_shape style=filled]
+	N10 [label="Price Adjustment" color="#F44336" fillcolor="#FFCDD2" shape=hexagon style=filled]
+	N11 [label="Delivery Rescheduling" color="#F44336" fillcolor="#FFCDD2" shape=document style=filled]
+	S1 [label="" color="#EAEFA5" fillcolor="#FDFCEB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#9575CD" fillcolor="#EDE7F6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#EAEFA5" fillcolor="#FDFCEB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Package Return {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Package Return"
+		nest0_0 [label="Promotion Application" color="#F44336" fillcolor="#FFCDD2" shape=ellipse style=filled]
+		nest0_1 [label="User Account Management" color="#F44336" fillcolor="#FFCDD2" shape=vnode_shape style=filled]
+		nest0_2 [label="Return Merchandise Authorization" color="#F44336" fillcolor="#FFCDD2" shape=box style=filled]
+	}
+	subgraph cluster_Payment {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Payment"
+		nest1_0 [label="Loyalty Points" color="#9575CD" fillcolor="#EDE7F6" shape=inputoutput style=filled]
+		nest1_1 [label="Checkout" color="#F44336" fillcolor="#FFCDD2" shape=database style=filled]
+		nest1_2 [label="Marketing Campaign Launch" color="#F44336" fillcolor="#FFCDD2" shape=action style=filled]
+	}
+	N0 -> N1 [color="#F44336" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#9575CD" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#F44336" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#F44336" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#9575CD" penwidth=1.5 style=solid label="fulfills" dir=forward]
+	N5 -> N6 [color="#EAEFA5" penwidth=1.5 style=dashed label="secures" dir=forward]
+	N6 -> N7 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#F44336" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#9575CD" penwidth=1.5 style=dashed dir=forward]
+	N10 -> N11 [color="#F44336" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> nest0_2 [color="#F44336" penwidth=1.5 style=dashed dir=forward]
+	N1 -> nest0_0 [color="#9575CD" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> N4 [color="#9575CD" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> nest1_2 [color="#9575CD" penwidth=1.5 style=solid dir=forward]
+	N4 -> nest1_0 [color="#9575CD" penwidth=1.5 style=dashed dir=forward]
+	nest1_2 -> N9 [color="#F44336" penwidth=1.5 style=dashed dir=forward]
+	N8 -> S1 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	S1 -> N11 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	S1 -> N10 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N0 -> S2 [color="#F44336" penwidth=1.5 style=solid dir=forward]
+	S2 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N8 [color="#F44336" penwidth=1.5 style=solid dir=forward]
+	S2 -> N6 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S2 -> N4 [color="#9575CD" penwidth=1.5 style=solid dir=forward]
+	N1 -> M0 [color="#9575CD" penwidth=1.5 style=solid dir=forward]
+	N2 -> M0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_247.txt b/test/diagrams/scanned_hard/diagrams_247.txt
new file mode 100644
index 0000000000000000000000000000000000000000..50e773fb11c65e71349be9cb7c67ac20c80eb814
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_247.txt
@@ -0,0 +1,35 @@
+<Alert Dispatch, connectedTo, Regulatory Compliance>
+<Consumption Logging, connectedTo, Alert Dispatch>
+<Energy Infrastructure Planning, connectedTo, Power Backup>
+<Energy Storage, connectedTo, Usage Billing>
+<Energy Trading, connectedTo, Wind Turbine Monitoring>
+<Fuel Delivery, connectedTo, Energy Trading>
+<Geothermal Power, automates, Fuel Delivery>
+<Geothermal Power, connectedTo, Consumption Logging>
+<Geothermal Power, connectedTo, Renewable Integration>
+<Hydropower Generation, connectedTo, Transformer Station>
+<Load Shedding, connectedTo, Pipeline Monitoring>
+<Load Shedding, connectedTo, Renewable Integration>
+<Nuclear Reactor Control, researches, Transmission Line Maintenance>
+<Oil and Gas Exploration, connectedTo, Regulatory Compliance>
+<Peak Shaving, connectedTo, Alert Dispatch>
+<Peak Shaving, connectedTo, Geothermal Power>
+<Peak Shaving, connectedTo, Smart Metering>
+<Pipeline Monitoring, connectedTo, Geothermal Power>
+<Pipeline Monitoring, connectedTo, Sensor Reading>
+<Pipeline Monitoring, connectedTo, Transmission Line Maintenance>
+<Pipeline Monitoring, connectedTo, Voltage Regulation>
+<Power Backup, connectedTo, Hydropower Generation>
+<Power Backup, connectedTo, Transmission Line Maintenance>
+<Regulatory Compliance, connectedTo, Energy Storage>
+<Regulatory Compliance, reads, Voltage Regulation>
+<Renewable Integration, connectedTo, Smart Metering>
+<Sensor Reading, connectedTo, Nuclear Reactor Control>
+<Sensor Reading, connectedTo, Renewable Integration>
+<Smart Metering, logs, Cybersecurity for Grid>
+<Transformer Station, connectedTo, Load Shedding>
+<Transformer Station, connectedTo, Transmission Line Maintenance>
+<Transmission Line Maintenance, connectedTo, Peak Shaving>
+<Usage Billing, connectedTo, Oil and Gas Exploration>
+<Voltage Regulation, connectedTo, Renewable Integration>
+<Wind Turbine Monitoring, connectedTo, Power Backup>
diff --git a/test/diagrams/scanned_hard/diagrams_250.txt b/test/diagrams/scanned_hard/diagrams_250.txt
new file mode 100644
index 0000000000000000000000000000000000000000..78dcb4f2e1e456588836f12f2b1bf1442a7188dd
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_250.txt
@@ -0,0 +1,34 @@
+<Antenna Maintenance, connectedTo, Video Conferencing>
+<Bandwidth Allocation, connectedTo, Issue Resolution>
+<Base Station Installation, connectedTo, Antenna Maintenance>
+<Base Station Installation, connectedTo, Call Recording>
+<Base Station Installation, connectedTo, Service Activation Request>
+<Base Station Installation, connectedTo, Spectrum Management>
+<Base Station Installation, connectedTo, Video Conferencing>
+<Billing Inquiry, connectedTo, Data Usage Logging>
+<Billing Inquiry, connectedTo, Plan Selection>
+<Call Recording, connectedTo, Service Activation Request>
+<Data Usage Logging, connectedTo, Service Level Agreement>
+<Device Setup, connectedTo, Plan Selection>
+<Device Setup, connectedTo, Service Activation Request>
+<Device Setup, connectedTo, Spectrum Management>
+<Device Setup, maintains, Plan Renewal>
+<Fiber Optic Deployment, connectedTo, Base Station Installation>
+<Fiber Optic Deployment, connectedTo, Call Recording>
+<Fiber Optic Deployment, connectedTo, Plan Selection>
+<Fiber Optic Deployment, disconnects, Plan Suspension>
+<Issue Resolution, connectedTo, Plan Renewal>
+<Mobile Top_up, connectedTo, Network Activation>
+<Network Activation, connectedTo, Troubleshooting Guide>
+<Network Security Monitoring, connectedTo, Billing Inquiry>
+<Plan Renewal, connectedTo, Network Security Monitoring>
+<Plan Renewal, connectedTo, Video Conferencing>
+<Plan Selection, connectedTo, Base Station Installation>
+<Plan Selection, connectedTo, Mobile Top_up>
+<Plan Suspension, connectedTo, Device Setup>
+<Roaming Activation, connectedTo, Plan Renewal>
+<Service Activation Request, connectedTo, Antenna Maintenance>
+<Service Level Agreement, connectedTo, Bandwidth Allocation>
+<Spectrum Management, connectedTo, Call Recording>
+<Spectrum Management, connectedTo, Video Conferencing>
+<Troubleshooting Guide, connectedTo, Roaming Activation>
diff --git a/test/diagrams/scanned_hard/diagrams_251.dot b/test/diagrams/scanned_hard/diagrams_251.dot
new file mode 100644
index 0000000000000000000000000000000000000000..215010bfb170673b6fccee1e4ba2db346ace46c3
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_251.dot
@@ -0,0 +1,76 @@
+digraph {
+	rankdir=TB
+	N0 [label="Greenhouse Control" color="#5C6BC0" fillcolor="#E8EAF6" shape=preparation style=filled]
+	N1 [label="Packaging for Sale" color="#BDBDBD" fillcolor="#F5F5F5" shape=rect style=filled]
+	N2 [label="Food Processing" color="#90A4AE" fillcolor="#ECEFF1" shape=box style=filled]
+	N3 [label="Livestock Feeding" color="#90A4AE" fillcolor="#ECEFF1" shape=ellipse style=filled]
+	N4 [label="Produce Sorting" color="#5C6BC0" fillcolor="#E8EAF6" shape=parallelogram style=filled]
+	N5 [label="Storage" color="#90A4AE" fillcolor="#ECEFF1" shape=database style=filled]
+	N6 [label="Crop Rotation Planning" color="#5C6BC0" fillcolor="#E8EAF6" shape=ellipse style=filled]
+	N7 [label="Drone Scouting" color="#90A4AE" fillcolor="#ECEFF1" shape=document style=filled]
+	N8 [label="Fencing Installation" color="#90A4AE" fillcolor="#ECEFF1" shape=preparation style=filled]
+	N9 [label="Seed Sowing" color="#90A4AE" fillcolor="#ECEFF1" shape=action style=filled]
+	N10 [label="Farm Machinery Operation" color="#5C6BC0" fillcolor="#E8EAF6" shape=document style=filled]
+	N11 [label="Weather Tracking" color="#90A4AE" fillcolor="#ECEFF1" shape=database style=filled]
+	N12 [label="Seedling Transplanting" color="#90A4AE" fillcolor="#ECEFF1" shape=box style=filled]
+	N13 [label="Grain Drying" color="#BDBDBD" fillcolor="#F5F5F5" shape=database style=filled]
+	N14 [label="Agricultural Research" color="#90A4AE" fillcolor="#ECEFF1" shape=database style=filled]
+	N15 [label="Forestry Management" color="#90A4AE" fillcolor="#ECEFF1" shape=rect style=filled]
+	S0 [label="" color="#90A4AE" fillcolor="#ECEFF1" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#5C6BC0" fillcolor="#E8EAF6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#BDBDBD" fillcolor="#F5F5F5" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#5C6BC0" fillcolor="#E8EAF6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Harvesting {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Harvesting"
+		nest0_0 [label="Disease Detection" color="#5C6BC0" fillcolor="#E8EAF6" shape=parallelogram style=filled]
+		nest0_1 [label="Fertilizer Application" color="#BDBDBD" fillcolor="#F5F5F5" shape=rect style=filled]
+		nest0_2 [label="Farm Maintenance" color="#5C6BC0" fillcolor="#E8EAF6" shape=inputoutput style=filled]
+		nest0_3 [label="Crop Monitoring" color="#90A4AE" fillcolor="#ECEFF1" shape=ellipse style=filled]
+	}
+	subgraph cluster_Soil Nutrient Management {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Soil Nutrient Management"
+		nest1_0 [label="Soil Testing" color="#5C6BC0" fillcolor="#E8EAF6" shape=inputoutput style=filled]
+		nest1_1 [label="Barn Cleaning" color="#90A4AE" fillcolor="#ECEFF1" shape=ellipse style=filled]
+		nest1_2 [label="Subsidy Application" color="#BDBDBD" fillcolor="#F5F5F5" shape=preparation style=filled]
+	}
+	N0 -> N1 [color="#90A4AE" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#BDBDBD" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#5C6BC0" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#5C6BC0" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#BDBDBD" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#90A4AE" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#90A4AE" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#90A4AE" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	N10 -> N11 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N11 -> N12 [color="#5C6BC0" penwidth=1.5 style=solid dir=forward]
+	N12 -> N13 [color="#BDBDBD" penwidth=1.5 style=solid dir=forward]
+	N13 -> N14 [color="#5C6BC0" penwidth=1.5 style=solid dir=forward]
+	N14 -> N15 [color="#5C6BC0" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#5C6BC0" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> nest0_2 [color="#BDBDBD" penwidth=1.5 style=dashed label="develops" dir=forward]
+	nest0_2 -> nest0_3 [color="#90A4AE" penwidth=1.5 style=solid dir=forward]
+	N2 -> nest0_0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest0_3 -> N4 [color="#90A4AE" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> nest1_2 [color="#BDBDBD" penwidth=1.5 style=solid dir=forward]
+	N10 -> nest1_0 [color="#90A4AE" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> N4 [color="#5C6BC0" penwidth=1.5 style=dashed dir=forward]
+	N4 -> S0 [color="#5C6BC0" penwidth=1.5 style=solid dir=forward]
+	S0 -> N11 [color="#90A4AE" penwidth=1.5 style=solid dir=forward]
+	S0 -> N14 [color="#BDBDBD" penwidth=1.5 style=solid dir=forward]
+	N4 -> S1 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N14 [color="#90A4AE" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N10 [color="#5C6BC0" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	M0 -> N3 [color="#5C6BC0" penwidth=1.5 style=dashed dir=forward]
+	N7 -> M1 [color="#BDBDBD" penwidth=1.5 style=solid dir=forward]
+	N3 -> M1 [color="#90A4AE" penwidth=1.5 style=dashed dir=forward]
+	M1 -> N12 [color="#5C6BC0" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_253.txt b/test/diagrams/scanned_hard/diagrams_253.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e051ff5db37c504b61fe23c2abd7c3f4954a0e6f
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_253.txt
@@ -0,0 +1,25 @@
+<Agent Assignment, connectedTo, Escrow Setup>
+<Agent Assignment, connectedTo, Eviction Process>
+<Agent Assignment, connectedTo, Lease Renewal>
+<Agent Assignment, connectedTo, Renovation Planning>
+<Closing Meeting, connectedTo, Property Appraisal>
+<Document Signing, connectedTo, Agent Assignment>
+<Document Signing, connectedTo, Land Acquisition>
+<Escrow Setup, connectedTo, Land Acquisition>
+<Eviction Process, acquires, Legal Verification>
+<Eviction Process, connectedTo, Property Appraisal>
+<Land Acquisition, connectedTo, Eviction Process>
+<Lease Renewal, connectedTo, Escrow Setup>
+<Lease Renewal, connectedTo, Renovation Planning>
+<Lease Renewal, connectedTo, Title Check>
+<Legal Verification, connectedTo, Virtual Tour Creation>
+<Ownership Transfer, connectedTo, Zoning Compliance>
+<Property Appraisal, connectedTo, Mortgage Application Assistance>
+<Property Listing, connectedTo, Closing Meeting>
+<Renovation Planning, connectedTo, Escrow Setup>
+<Renovation Planning, renovates, Land Acquisition>
+<Title Check, connectedTo, Land Acquisition>
+<Title Check, connectedTo, Ownership Transfer>
+<Title Check, connectedTo, Renovation Planning>
+<Virtual Tour Creation, connectedTo, Property Listing>
+<Zoning Compliance, finalizes, Property Appraisal>
diff --git a/test/diagrams/scanned_hard/diagrams_254.txt b/test/diagrams/scanned_hard/diagrams_254.txt
new file mode 100644
index 0000000000000000000000000000000000000000..54c838c3ce21dae18a38baf665f6b0b1a3230a9c
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_254.txt
@@ -0,0 +1,27 @@
+<Bomb Disposal, connectedTo, Incident Command System Activation>
+<Community Outreach, connectedTo, Resource Allocation>
+<Crowd Management, connectedTo, K9 Unit Deployment>
+<Cybersecurity Threat Response, connectedTo, Victim Support Services>
+<Drug Interdiction, connectedTo, Post_Incident Review>
+<Emergency Dispatch, connectedTo, Hazard Detection>
+<Emergency Dispatch, connectedTo, Public Safety Training>
+<Evacuation Planning, connectedTo, Incident Command System Activation>
+<Hazard Detection, connectedTo, Post_Incident Review>
+<Hazard Detection, connectedTo, Threat Assessment>
+<Hazard Detection, connectedTo, Victim Support Services>
+<Hazard Detection, protects, Resource Allocation>
+<Hazard Detection, reports, Community Outreach>
+<Incident Command System Activation, connectedTo, Responder Alert>
+<Incident Command System Activation, connectedTo, Witness Interview>
+<Inmate Transport, connectedTo, Cybersecurity Threat Response>
+<Inmate Transport, connectedTo, Victim Support Services>
+<Inmate Transport, debriefs, Community Outreach>
+<K9 Unit Deployment, certifies, Inmate Transport>
+<Post_Incident Review, connectedTo, Crowd Management>
+<Public Safety Training, connectedTo, Evacuation Planning>
+<Public Safety Training, connectedTo, Hazard Detection>
+<Resource Allocation, connectedTo, Cybersecurity Threat Response>
+<Responder Alert, connectedTo, Hazard Detection>
+<Threat Assessment, connectedTo, Drug Interdiction>
+<Victim Support Services, connectedTo, Surveillance Review>
+<Witness Interview, connectedTo, Bomb Disposal>
diff --git a/test/diagrams/scanned_hard/diagrams_256.txt b/test/diagrams/scanned_hard/diagrams_256.txt
new file mode 100644
index 0000000000000000000000000000000000000000..868cb235afece92deca49e33413ecf876843ff1d
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_256.txt
@@ -0,0 +1,27 @@
+<Air Quality Monitoring, connectedTo, Policy Advocacy>
+<Biodiversity Conservation, connectedTo, Emission Reporting>
+<Citizen Science Initiative, connectedTo, Water Sampling>
+<Climate Modeling, connectedTo, Wildlife Survey>
+<Conservation Easement, measures, Ecological Footprint Analysis>
+<Ecological Footprint Analysis, connectedTo, Water Sampling>
+<Ecosystem Restoration, connectedTo, Policy Advocacy>
+<Emission Reporting, connectedTo, Conservation Easement>
+<Emission Reporting, connectedTo, Renewable Energy Project Development>
+<Hazardous Material Handling, adapts, Biodiversity Conservation>
+<Hazardous Material Handling, connectedTo, Resource Recovery>
+<Policy Advocacy, connectedTo, Biodiversity Conservation>
+<Policy Advocacy, connectedTo, Water Sampling>
+<Policy Advocacy, models, Hazardous Material Handling>
+<Pollution Alert, connectedTo, Resource Tracking>
+<Pollution Alert, restores, Biodiversity Conservation>
+<Renewable Energy Project Development, connectedTo, Citizen Science Initiative>
+<Resource Recovery, connectedTo, Climate Modeling>
+<Resource Recovery, connectedTo, Conservation Easement>
+<Resource Recovery, connectedTo, Ecological Footprint Analysis>
+<Resource Recovery, connectedTo, Pollution Alert>
+<Resource Recovery, connectedTo, Species Reintroduction>
+<Resource Recovery, connectedTo, Water Sampling>
+<Resource Tracking, connectedTo, Biodiversity Conservation>
+<Species Reintroduction, connectedTo, Pollution Alert>
+<Sustainable Agriculture Practices, connectedTo, Ecosystem Restoration>
+<Wildlife Survey, connectedTo, Sustainable Agriculture Practices>
diff --git a/test/diagrams/scanned_hard/diagrams_257.txt b/test/diagrams/scanned_hard/diagrams_257.txt
new file mode 100644
index 0000000000000000000000000000000000000000..859c6c7d7e6cc73f0ea27f46c355421db6de2ed6
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_257.txt
@@ -0,0 +1,38 @@
+<Border Control, connectedTo, Policy Drafting>
+<Border Control, connectedTo, Transparency Audit>
+<Border Control, connectedTo, Urban Planning>
+<Border Control, connectedTo, Veterans Affairs>
+<Border Control, secures, Grant Distribution>
+<Budget Allocation, collects, Passport Issuance>
+<Budget Allocation, connectedTo, National Defense>
+<Budget Allocation, connectedTo, Public Health Initiative>
+<Business Licensing, connectedTo, Public Records Request>
+<Census Collection, connectedTo, Public Records Request>
+<Citizen Feedback, connectedTo, Passport Issuance>
+<Citizen Feedback, connectedTo, Permit Application>
+<Compliance Checking, serves, Transparency Audit>
+<Diplomatic Negotiation, connectedTo, Veterans Affairs>
+<Driver's License Renewal, connectedTo, Budget Allocation>
+<Grant Distribution, connectedTo, Diplomatic Negotiation>
+<Infrastructure Planning, connectedTo, Border Control>
+<International Relations, connectedTo, Public Hearing>
+<Legislation Review, connectedTo, Social Security Administration>
+<National Defense, connectedTo, International Relations>
+<National Defense, provides, Citizen Feedback>
+<Passport Issuance, connectedTo, Compliance Checking>
+<Passport Issuance, connectedTo, Diplomatic Negotiation>
+<Passport Issuance, connectedTo, Policy Drafting>
+<Passport Issuance, connectedTo, Public Health Initiative>
+<Passport Issuance, connectedTo, Transparency Audit>
+<Permit Application, connectedTo, Census Collection>
+<Permit Application, connectedTo, Passport Issuance>
+<Policy Drafting, connectedTo, Legislation Review>
+<Public Health Initiative, connectedTo, Infrastructure Planning>
+<Public Hearing, connectedTo, Transparency Audit>
+<Public Records Request, connectedTo, Passport Issuance>
+<Public Records Request, monitors, Public Health Initiative>
+<Public Works Maintenance, connectedTo, Business Licensing>
+<Social Security Administration, connectedTo, Grant Distribution>
+<Social Security Administration, connectedTo, Public Works Maintenance>
+<Transparency Audit, connectedTo, Urban Planning>
+<Veterans Affairs, connectedTo, Compliance Checking>
diff --git a/test/diagrams/scanned_hard/diagrams_258.dot b/test/diagrams/scanned_hard/diagrams_258.dot
new file mode 100644
index 0000000000000000000000000000000000000000..4dc916a3fc2337544f8f8bf02acb520903333f8e
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_258.dot
@@ -0,0 +1,73 @@
+digraph {
+	rankdir=LR
+	N0 [label="Receipt Issuing" color="#42A5F5" fillcolor="#F1F8FF" shape=diamond style=filled]
+	N1 [label="Visual Merchandising" color="#42A5F5" fillcolor="#F1F8FF" shape=document style=filled]
+	N2 [label="Customer Engagement" color="#BA68C8" fillcolor="#F3E5F5" shape=rectangle style=filled]
+	N3 [label="Self_Checkout Assistance" color="#BA68C8" fillcolor="#F3E5F5" shape=rect style=filled]
+	N4 [label="Product Listing" color="#42A5F5" fillcolor="#F1F8FF" shape=action style=filled]
+	N5 [label="Supply Chain Optimization" color="#42A5F5" fillcolor="#F1F8FF" shape=parallelogram style=filled]
+	N6 [label="Inventory Check" color="#BDBDBD" fillcolor="#F5F5F5" shape=inputoutput style=filled]
+	N7 [label="Supplier Payment" color="#BA68C8" fillcolor="#F3E5F5" shape=inputoutput style=filled]
+	N8 [label="Point of Sale System Update" color="#BA68C8" fillcolor="#F3E5F5" shape=rectangle style=filled]
+	N9 [label="Discount Application" color="#BDBDBD" fillcolor="#F5F5F5" shape=parallelogram style=filled]
+	N10 [label="Security Tagging" color="#42A5F5" fillcolor="#F1F8FF" shape=multipledocuments style=filled]
+	N11 [label="Shelf Restocking" color="#42A5F5" fillcolor="#F1F8FF" shape=predefinedprocess style=filled]
+	N12 [label="Product Demonstration" color="#BA68C8" fillcolor="#F3E5F5" shape=preparation style=filled]
+	N13 [label="Shopping Cart Collection" color="#42A5F5" fillcolor="#F1F8FF" shape=box style=filled]
+	N14 [label="Seasonal Sales Planning" color="#BA68C8" fillcolor="#F3E5F5" shape=document style=filled]
+	S0 [label="" color="#42A5F5" fillcolor="#F1F8FF" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#BA68C8" fillcolor="#F3E5F5" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#BDBDBD" fillcolor="#F5F5F5" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#42A5F5" fillcolor="#F1F8FF" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Barcode Scanning {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Barcode Scanning"
+		nest0_0 [label="Payment Processing" color="#BA68C8" fillcolor="#F3E5F5" shape=predefinedprocess style=filled]
+		nest0_1 [label="Promotion Planning" color="#BA68C8" fillcolor="#F3E5F5" shape=predefinedprocess style=filled]
+		nest0_2 [label="E_commerce Platform Integration" color="#42A5F5" fillcolor="#F1F8FF" shape=inputoutput style=filled]
+	}
+	subgraph cluster_Warehouse Picking {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Warehouse Picking"
+		nest1_0 [label="Complaint Management" color="#BDBDBD" fillcolor="#F5F5F5" shape=hexagon style=filled]
+		nest1_1 [label="Loyalty Program Update" color="#BA68C8" fillcolor="#F3E5F5" shape=parallelogram style=filled]
+	}
+	N0 -> N1 [color="#BA68C8" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#BDBDBD" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#42A5F5" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#BDBDBD" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#BA68C8" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#BA68C8" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#42A5F5" penwidth=1.5 style=dashed dir=forward]
+	N12 -> N13 [color="#BA68C8" penwidth=1.5 style=solid dir=forward]
+	N13 -> N14 [color="#42A5F5" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> nest0_2 [color="#BA68C8" penwidth=1.5 style=solid label="assists" dir=forward]
+	N1 -> nest0_0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest0_2 -> N5 [color="#BA68C8" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#BA68C8" penwidth=1.5 style=solid dir=forward]
+	N3 -> nest1_0 [color="#42A5F5" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> N8 [color="#42A5F5" penwidth=1.5 style=solid dir=forward]
+	N2 -> S0 [color="#BDBDBD" penwidth=1.5 style=solid dir=forward]
+	S0 -> N7 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S0 -> N5 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N14 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	N10 -> S1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N13 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S1 -> N12 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N14 [color="#BDBDBD" penwidth=1.5 style=solid dir=forward]
+	N5 -> M0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N4 -> M0 [color="#BDBDBD" penwidth=1.5 style=solid dir=forward]
+	N7 -> M0 [color="#42A5F5" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N9 [color="#BA68C8" penwidth=1.5 style=solid dir=forward]
+	N0 -> M1 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M1 [color="#BDBDBD" penwidth=1.5 style=solid label="promotes" dir=forward]
+	M1 -> N8 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_260.txt b/test/diagrams/scanned_hard/diagrams_260.txt
new file mode 100644
index 0000000000000000000000000000000000000000..58d2dbe72624d598cbba7d91151af0ffd2f94030
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_260.txt
@@ -0,0 +1,38 @@
+<Aircraft Maintenance Log, connectedTo, Extravehicular Activity Planning>
+<Astronaut Training, reboots, Spacecraft Telemetry Analysis>
+<Aviation Safety Audit, connectedTo, Runway Inspection>
+<Avionics Installation, connectedTo, Rocket Stage Separation>
+<Countdown Sequence, connectedTo, International Space Station Resupply>
+<Countdown Sequence, connectedTo, Orbit Adjustment>
+<Data Transmission, connectedTo, Satellite Configuration>
+<Emergency Protocols, connectedTo, Launch Window Calculation>
+<Engine Overhaul, connectedTo, Launch Execution>
+<Extravehicular Activity Planning, connectedTo, Data Transmission>
+<Hypersonic Flight Testing, connectedTo, Re_entry Vehicle Design>
+<International Space Station Resupply, transmits, Emergency Protocols>
+<Launch Execution, connectedTo, Countdown Sequence>
+<Launch Execution, connectedTo, Data Transmission>
+<Launch Execution, connectedTo, Orbit Adjustment>
+<Launch Window Calculation, connectedTo, Structural Analysis>
+<New Material Development, launches, Avionics Installation>
+<Orbit Adjustment, connectedTo, International Space Station Resupply>
+<Payload Integration, connectedTo, Emergency Protocols>
+<Payload Integration, connectedTo, Engine Overhaul>
+<Payload Integration, coordinates, Astronaut Training>
+<Re_entry Vehicle Design, connectedTo, Flight Crew Training>
+<Rocket Stage Separation, adjusts, Countdown Sequence>
+<Rocket Stage Separation, connectedTo, Aircraft Maintenance Log>
+<Runway Inspection, connectedTo, International Space Station Resupply>
+<Runway Inspection, connectedTo, Rocket Stage Separation>
+<Satellite Configuration, connectedTo, Aviation Safety Audit>
+<Satellite Configuration, reports, Emergency Protocols>
+<Space Debris Tracking, connectedTo, Hypersonic Flight Testing>
+<Spacecraft Telemetry Analysis, connectedTo, Engine Overhaul>
+<Spacecraft Telemetry Analysis, connectedTo, System Reboot>
+<Structural Analysis, connectedTo, Flight Crew Training>
+<Structural Analysis, connectedTo, Hypersonic Flight Testing>
+<Structural Analysis, connectedTo, New Material Development>
+<Structural Analysis, connectedTo, Space Debris Tracking>
+<Structural Analysis, designs, Re_entry Vehicle Design>
+<System Reboot, connectedTo, Emergency Protocols>
+<System Reboot, connectedTo, Engine Overhaul>
diff --git a/test/diagrams/scanned_hard/diagrams_261.dot b/test/diagrams/scanned_hard/diagrams_261.dot
new file mode 100644
index 0000000000000000000000000000000000000000..3a93c68a492c3039490f7961860ef2d90e366ec5
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_261.dot
@@ -0,0 +1,55 @@
+digraph {
+	rankdir=LR
+	N0 [label="Cyber Insurance Policy" color="#42A5F5" fillcolor="#F1F8FF" shape=rectangle style=filled]
+	N1 [label="Auto Accident Claims" color="#42A5F5" fillcolor="#F1F8FF" shape=diamond style=filled]
+	N2 [label="Agent Training" color="#E0E0E0" fillcolor="#EBEBEB" shape=multipledocuments style=filled]
+	N3 [label="Market Research" color="#FFCC80" fillcolor="#FFF0CC" shape=database style=filled]
+	N4 [label="Annuity Sales" color="#E0E0E0" fillcolor="#EBEBEB" shape=multipledocuments style=filled]
+	N5 [label="Policy Renewal" color="#42A5F5" fillcolor="#F1F8FF" shape=rect style=filled]
+	N6 [label="Property Damage Assessment" color="#42A5F5" fillcolor="#F1F8FF" shape=ellipse style=filled]
+	S0 [label="" color="#FFCC80" fillcolor="#FFF0CC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#FFCC80" fillcolor="#FFF0CC" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M2 [label="" color="#E0E0E0" fillcolor="#EBEBEB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Investment Management for Reserves {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Investment Management for Reserves"
+		nest0_0 [label="Business Interruption Coverage" color="#E0E0E0" fillcolor="#EBEBEB" shape=rectangle style=filled]
+		nest0_1 [label="Healthcare Provider Network Management" color="#FFCC80" fillcolor="#FFF0CC" shape=parallelogram style=filled]
+		nest0_2 [label="Policy Issuance" color="#E0E0E0" fillcolor="#EBEBEB" shape=database style=filled]
+	}
+	subgraph cluster_Product Development {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Product Development"
+		nest1_0 [label="Policy Application" color="#FFCC80" fillcolor="#FFF0CC" shape=multipledocuments style=filled]
+		nest1_1 [label="Underwriting" color="#E0E0E0" fillcolor="#EBEBEB" shape=predefinedprocess style=filled]
+		nest1_2 [label="Premium Calculation" color="#42A5F5" fillcolor="#F1F8FF" shape=rectangle style=filled]
+		nest1_3 [label="Fraud Investigation" color="#FFCC80" fillcolor="#FFF0CC" shape=inputoutput style=filled]
+	}
+	N0 -> N1 [color="#E0E0E0" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#42A5F5" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#42A5F5" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#42A5F5" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	N1 -> nest0_0 [color="#E0E0E0" penwidth=1.5 style=solid label="mitigates" dir=forward]
+	nest0_2 -> N1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> nest1_2 [color="#E0E0E0" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> nest1_3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> nest1_0 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	nest1_3 -> N4 [color="#E0E0E0" penwidth=1.5 style=dashed dir=forward]
+	N0 -> S0 [color="#E0E0E0" penwidth=1.5 style=solid dir=forward]
+	S0 -> N2 [color="#42A5F5" penwidth=1.5 style=solid label="pays" dir=forward]
+	S0 -> N5 [color="#42A5F5" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N6 [color="#42A5F5" penwidth=1.5 style=solid dir=forward]
+	N1 -> S1 [color="#42A5F5" penwidth=1.5 style=solid dir=forward]
+	S1 -> N3 [color="#E0E0E0" penwidth=1.5 style=solid dir=forward]
+	S1 -> N5 [color="#42A5F5" penwidth=1.5 style=solid dir=forward]
+	N2 -> M2 [color="#E0E0E0" penwidth=1.5 style=solid dir=forward]
+	N1 -> M2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	M2 -> N5 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_262.txt b/test/diagrams/scanned_hard/diagrams_262.txt
new file mode 100644
index 0000000000000000000000000000000000000000..dbd8185fdfa9e54d73cf4708b918b3dfbb57659e
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_262.txt
@@ -0,0 +1,30 @@
+<Antivirus Management, connectedTo, Security Audit>
+<Compliance Monitoring, connectedTo, Insider Threat Detection>
+<Data Encryption, connectedTo, Identity Management>
+<Data Encryption, consults, Security Operations Center Monitoring>
+<DevSecOps Integration, connectedTo, Security Operations Center Monitoring>
+<DevSecOps Integration, connectedTo, Vulnerability Assessment>
+<Disaster Recovery Planning, connectedTo, Penetration Testing>
+<Firewall Configuration, connectedTo, Penetration Testing>
+<Firewall Configuration, connectedTo, Security Operations Center Monitoring>
+<Firewall Configuration, designs, Disaster Recovery Planning>
+<Identity Management, connectedTo, Disaster Recovery Planning>
+<Identity Management, connectedTo, Firewall Configuration>
+<Identity Management, connectedTo, Penetration Testing>
+<Identity Management, connectedTo, Security Awareness Training>
+<Identity Management, connectedTo, Security Operations Center Monitoring>
+<Insider Threat Detection, blocks, Firewall Configuration>
+<Physical Security Integration, connectedTo, Antivirus Management>
+<Security Audit, connectedTo, Zero Trust Architecture>
+<Security Awareness Training, connectedTo, Security Operations Center Monitoring>
+<Security Awareness Training, notifies, Firewall Configuration>
+<Security Operations Center Monitoring, tests, Disaster Recovery Planning>
+<Vulnerability Assessment, connectedTo, Compliance Monitoring>
+<Vulnerability Assessment, connectedTo, Data Encryption>
+<Vulnerability Assessment, connectedTo, Firewall Configuration>
+<Vulnerability Assessment, connectedTo, Identity Management>
+<Vulnerability Assessment, connectedTo, Penetration Testing>
+<Vulnerability Assessment, connectedTo, Physical Security Integration>
+<Vulnerability Assessment, connectedTo, Security Awareness Training>
+<Vulnerability Assessment, connectedTo, Security Operations Center Monitoring>
+<Zero Trust Architecture, connectedTo, Disaster Recovery Planning>
diff --git a/test/diagrams/scanned_hard/diagrams_264.txt b/test/diagrams/scanned_hard/diagrams_264.txt
new file mode 100644
index 0000000000000000000000000000000000000000..3575c5834b544468fc6f183a28b4574942ffaca4
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_264.txt
@@ -0,0 +1,34 @@
+<Air Quality Index Reporting, connectedTo, Smart Lighting>
+<Citizen Engagement Platform, connectedTo, Disaster Resilience Planning>
+<Crowd Management, connectedTo, Urban Agriculture Support>
+<Digital Kiosk Information, connectedTo, Urban Agriculture Support>
+<Disaster Resilience Planning, connectedTo, Smart Grid Security>
+<E_governance Services, connectedTo, Air Quality Index Reporting>
+<E_governance Services, connectedTo, Crowd Management>
+<E_governance Services, connectedTo, Smart Lighting>
+<E_governance Services, connectedTo, Urban Agriculture Support>
+<Emergency Response System, connectedTo, Environmental Sensor Network>
+<Emergency Response System, connectedTo, Sustainable Resource Management>
+<Energy Grid Management, connectedTo, Citizen Engagement Platform>
+<Environmental Sensor Network, connectedTo, Renewable Energy Integration>
+<Environmental Sensor Network, connectedTo, Water Management System>
+<Intelligent Public Safety Cameras, connectedTo, Crowd Management>
+<Intelligent Public Safety Cameras, connectedTo, E_governance Services>
+<Predictive Maintenance for Utilities, connectedTo, Waste Management Optimization>
+<Public Transport Tracking, connectedTo, Digital Kiosk Information>
+<Renewable Energy Integration, connectedTo, Smart Grid Security>
+<Smart Grid Security, connectedTo, Predictive Maintenance for Utilities>
+<Smart Traffic Lights, routes, Public Transport Tracking>
+<Sustainable Resource Management, connectedTo, Crowd Management>
+<Sustainable Resource Management, connectedTo, Environmental Sensor Network>
+<Sustainable Resource Management, connectedTo, Urban Mobility Solutions>
+<Urban Agriculture Support, connectedTo, Air Quality Index Reporting>
+<Urban Mobility Solutions, connectedTo, Crowd Management>
+<Urban Mobility Solutions, connectedTo, E_governance Services>
+<Urban Mobility Solutions, connectedTo, Environmental Sensor Network>
+<Urban Mobility Solutions, connectedTo, Intelligent Public Safety Cameras>
+<Urban Mobility Solutions, connectedTo, Smart Grid Security>
+<Waste Management Optimization, connectedTo, Crowd Management>
+<Waste Management Optimization, connectedTo, Intelligent Public Safety Cameras>
+<Waste Management Optimization, connectedTo, Smart Traffic Lights>
+<Water Management System, connectedTo, Energy Grid Management>
diff --git a/test/diagrams/scanned_hard/diagrams_266.dot b/test/diagrams/scanned_hard/diagrams_266.dot
new file mode 100644
index 0000000000000000000000000000000000000000..9549eca6f3c6b426486f3eda5f5a50f075eb69fb
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_266.dot
@@ -0,0 +1,77 @@
+digraph {
+	rankdir=BT
+	N0 [label="Post_Approval Commitment Tracking" color="#FFEB3B" fillcolor="#FFF9C4" shape=ellipse style=filled]
+	N1 [label="Cleanroom Operations" color="#EAEFA5" fillcolor="#FDFCEB" shape=diamond style=filled]
+	N2 [label="Formulation Development" color="#FFEB3B" fillcolor="#FFF9C4" shape=action style=filled]
+	N3 [label="Counterfeit Drug Detection" color="#90A4AE" fillcolor="#ECEFF1" shape=vnode_shape style=filled]
+	N4 [label="Drug Stability Testing" color="#EAEFA5" fillcolor="#FDFCEB" shape=document style=filled]
+	N5 [label="Health Economics Outcomes Research" color="#90A4AE" fillcolor="#ECEFF1" shape=inputoutput style=filled]
+	N6 [label="Pharmacovigilance" color="#FFEB3B" fillcolor="#FFF9C4" shape=ellipse style=filled]
+	N7 [label="Sterile Product Filling" color="#90A4AE" fillcolor="#ECEFF1" shape=preparation style=filled]
+	N8 [label="Compound Synthesis" color="#EAEFA5" fillcolor="#FDFCEB" shape=document style=filled]
+	N9 [label="Injectable Drug Manufacturing" color="#EAEFA5" fillcolor="#FDFCEB" shape=inputoutput style=filled]
+	N10 [label="Adverse Event Reporting" color="#EAEFA5" fillcolor="#FDFCEB" shape=predefinedprocess style=filled]
+	N11 [label="Packaging" color="#EAEFA5" fillcolor="#FDFCEB" shape=diamond style=filled]
+	N12 [label="Market Access Strategy" color="#EAEFA5" fillcolor="#FDFCEB" shape=inputoutput style=filled]
+	N13 [label="Supply Chain Management" color="#EAEFA5" fillcolor="#FDFCEB" shape=hexagon style=filled]
+	N14 [label="Drug Research" color="#EAEFA5" fillcolor="#FDFCEB" shape=inputoutput style=filled]
+	N15 [label="Active Pharmaceutical Ingredient Production" color="#FFEB3B" fillcolor="#FFF9C4" shape=predefinedprocess style=filled]
+	N16 [label="Drug Device Combination" color="#EAEFA5" fillcolor="#FDFCEB" shape=database style=filled]
+	N17 [label="Biostatistics" color="#EAEFA5" fillcolor="#FDFCEB" shape=ellipse style=filled]
+	S0 [label="" color="#90A4AE" fillcolor="#ECEFF1" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#90A4AE" fillcolor="#ECEFF1" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#FFEB3B" fillcolor="#FFF9C4" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Intellectual Property Litigation {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Intellectual Property Litigation"
+		nest0_0 [label="Patient Adherence Programs" color="#FFEB3B" fillcolor="#FFF9C4" shape=rect style=filled]
+		nest0_1 [label="Sales and Marketing Strategy" color="#EAEFA5" fillcolor="#FDFCEB" shape=predefinedprocess style=filled]
+		nest0_2 [label="Process Validation" color="#FFEB3B" fillcolor="#FFF9C4" shape=preparation style=filled]
+	}
+	subgraph cluster_Clinical Trial Phases {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Clinical Trial Phases"
+		nest1_0 [label="Distribution" color="#FFEB3B" fillcolor="#FFF9C4" shape=vnode_shape style=filled]
+		nest1_1 [label="Clinical Supply Management" color="#90A4AE" fillcolor="#ECEFF1" shape=box style=filled]
+		nest1_2 [label="Regulatory Approval" color="#FFEB3B" fillcolor="#FFF9C4" shape=hexagon style=filled]
+	}
+	N0 -> N1 [color="#FFEB3B" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#EAEFA5" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#90A4AE" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#FFEB3B" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#90A4AE" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#90A4AE" penwidth=1.5 style=solid label="partners" dir=forward]
+	N9 -> N10 [color="#FFEB3B" penwidth=1.5 style=dashed label="advises" dir=forward]
+	N10 -> N11 [color="#90A4AE" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N12 -> N13 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N13 -> N14 [color="#90A4AE" penwidth=1.5 style=dashed dir=forward]
+	N14 -> N15 [color="#FFEB3B" penwidth=1.5 style=solid dir=forward]
+	N15 -> N16 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N16 -> N17 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#FFEB3B" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> nest0_2 [color="#90A4AE" penwidth=1.5 style=solid dir=forward]
+	N12 -> nest0_0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest0_2 -> N1 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#EAEFA5" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> nest1_2 [color="#FFEB3B" penwidth=1.5 style=solid dir=forward]
+	N3 -> nest1_0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> N1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N7 -> S0 [color="#90A4AE" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N15 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S0 -> N11 [color="#EAEFA5" penwidth=1.5 style=solid dir=forward]
+	S0 -> N10 [color="#90A4AE" penwidth=1.5 style=solid dir=forward]
+	S0 -> N17 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N13 -> S1 [color="#FFEB3B" penwidth=1.5 style=solid dir=forward]
+	S1 -> N17 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S1 -> N16 [color="#90A4AE" penwidth=1.5 style=solid dir=forward]
+	S1 -> N15 [color="#000000" penwidth=1.5 style=dashed label="researches" dir=forward]
+	N8 -> M0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N7 -> M0 [color="#EAEFA5" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N13 [color="#000000" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_269.dot b/test/diagrams/scanned_hard/diagrams_269.dot
new file mode 100644
index 0000000000000000000000000000000000000000..907aa468ff582f8037809d1bad9d8d2de83cc14e
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_269.dot
@@ -0,0 +1,65 @@
+digraph {
+	rankdir=BT
+	N0 [label="Distribution" color="#FFD54F" fillcolor="#FFF8E1" shape=action style=filled]
+	N1 [label="Print Layout" color="#FF9800" fillcolor="#FFE0B2" shape=diamond style=filled]
+	N2 [label="Music Recording" color="#D3EB9F" fillcolor="#F8FDD3" shape=predefinedprocess style=filled]
+	N3 [label="User Generated Content Curation" color="#D3EB9F" fillcolor="#F8FDD3" shape=multipledocuments style=filled]
+	N4 [label="Visual Effects" color="#FF9800" fillcolor="#FFE0B2" shape=multipledocuments style=filled]
+	N5 [label="Content Creation" color="#D3EB9F" fillcolor="#F8FDD3" shape=predefinedprocess style=filled]
+	N6 [label="Sound Design" color="#FF9800" fillcolor="#FFE0B2" shape=rect style=filled]
+	N7 [label="Content Moderation" color="#FF9800" fillcolor="#FFE0B2" shape=hexagon style=filled]
+	N8 [label="Radio Programming" color="#FF9800" fillcolor="#FFE0B2" shape=diamond style=filled]
+	N9 [label="Podcast Production" color="#D3EB9F" fillcolor="#F8FDD3" shape=diamond style=filled]
+	N10 [label="Advertising Sales" color="#FFD54F" fillcolor="#FFF8E1" shape=vnode_shape style=filled]
+	N11 [label="Cross_Platform Syndication" color="#FF9800" fillcolor="#FFE0B2" shape=box style=filled]
+	S0 [label="" color="#FF9800" fillcolor="#FFE0B2" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#D3EB9F" fillcolor="#F8FDD3" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#D3EB9F" fillcolor="#F8FDD3" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M2 [label="" color="#FFD54F" fillcolor="#FFF8E1" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Audience Engagement {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Audience Engagement"
+		nest0_0 [label="Game Streaming" color="#D3EB9F" fillcolor="#F8FDD3" shape=box style=filled]
+		nest0_1 [label="Virtual Reality Content Creation" color="#D3EB9F" fillcolor="#F8FDD3" shape=box style=filled]
+	}
+	subgraph cluster_Analytics Reporting {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Analytics Reporting"
+		nest1_0 [label="Photojournalism" color="#FF9800" fillcolor="#FFE0B2" shape=multipledocuments style=filled]
+		nest1_1 [label="Augmented Reality Experiences" color="#FF9800" fillcolor="#FFE0B2" shape=box style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#D3EB9F" penwidth=1.5 style=dashed dir=forward]
+	N10 -> N11 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	nest0_0 -> nest0_1 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N1 -> nest0_0 [color="#D3EB9F" penwidth=1.5 style=solid dir=forward]
+	nest0_1 -> N3 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#FFD54F" penwidth=1.5 style=solid dir=forward]
+	N7 -> nest1_0 [color="#D3EB9F" penwidth=1.5 style=dashed label="writes" dir=forward]
+	nest1_1 -> N3 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N0 -> S0 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N11 [color="#D3EB9F" penwidth=1.5 style=solid dir=forward]
+	S0 -> N2 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N3 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N6 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N0 -> S1 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	S1 -> N11 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S1 -> N6 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N2 -> S2 [color="#D3EB9F" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N6 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N11 [color="#FFD54F" penwidth=1.5 style=solid dir=forward]
+	S2 -> N7 [color="#FFD54F" penwidth=1.5 style=solid label="advertises" dir=forward]
+	N0 -> M2 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M2 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	M2 -> N3 [color="#FFD54F" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_277.txt b/test/diagrams/scanned_hard/diagrams_277.txt
new file mode 100644
index 0000000000000000000000000000000000000000..98c075d85d3d045ead36783828bc5fee37ea93fc
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_277.txt
@@ -0,0 +1,35 @@
+<Asset Management, connectedTo, Geotechnical Stability Analysis>
+<Autonomous Haulage Systems, connectedTo, Environmental Impact Assessment>
+<Community Relations, connectedTo, Refining>
+<Community Relations, connectedTo, Regulatory Compliance Reporting>
+<Community Relations, connectedTo, Safety Management>
+<Core Logging, connectedTo, Drilling and Blasting>
+<Crushing and Grinding, connectedTo, Dust Control>
+<Crushing and Grinding, connectedTo, Regulatory Compliance Reporting>
+<Crushing and Grinding, connectedTo, Safety Management>
+<Crushing and Grinding, connectedTo, Ventilation System>
+<Drilling and Blasting, connectedTo, Feasibility Study>
+<Dust Control, connectedTo, Safety Management>
+<Environmental Impact Assessment, connectedTo, Waste Rock Management>
+<Exploration, connectedTo, Crushing and Grinding>
+<Exploration Drilling, connectedTo, Refining>
+<Feasibility Study, connectedTo, Ore Sorting>
+<Feasibility Study, connectedTo, Regulatory Compliance Reporting>
+<Feasibility Study, funds, Crushing and Grinding>
+<Geotechnical Stability Analysis, connectedTo, Exploration Drilling>
+<Mine Dewatering, connectedTo, Water Management>
+<Ore Sorting, connectedTo, Asset Management>
+<Ore Sorting, connectedTo, Tailings Management>
+<Reclamation, connectedTo, Autonomous Haulage Systems>
+<Reclamation, connectedTo, Core Logging>
+<Refining, connectedTo, Mine Dewatering>
+<Refining, connectedTo, Regulatory Compliance Reporting>
+<Regulatory Compliance Reporting, connectedTo, Dust Control>
+<Regulatory Compliance Reporting, connectedTo, Smelting>
+<Regulatory Compliance Reporting, connectedTo, Ventilation System>
+<Safety Management, connectedTo, Ventilation System>
+<Smelting, connectedTo, Dust Control>
+<Tailings Management, connectedTo, Reclamation>
+<Tailings Management, secures, Crushing and Grinding>
+<Waste Rock Management, connectedTo, Exploration>
+<Water Management, connectedTo, Feasibility Study>
diff --git a/test/diagrams/scanned_hard/diagrams_279.txt b/test/diagrams/scanned_hard/diagrams_279.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6fada12681eae781925d345d2236ac9808f4ccd6
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_279.txt
@@ -0,0 +1,38 @@
+<Asteroid Mining Feasibility, connectedTo, Launch Operations>
+<Astronaut Training, connectedTo, Asteroid Mining Feasibility>
+<Astronaut Training, connectedTo, Autonomous Rendezvous and Docking>
+<Astronaut Training, connectedTo, Ground Station Operations>
+<Astronaut Training, connectedTo, Mission Design>
+<Astronaut Training, connectedTo, Rocket Propulsion Development>
+<Autonomous Rendezvous and Docking, connectedTo, Asteroid Mining Feasibility>
+<Commercial Space Flight Regulation, connectedTo, Asteroid Mining Feasibility>
+<Commercial Space Flight Regulation, connectedTo, Astronaut Training>
+<Commercial Space Flight Regulation, connectedTo, Data Acquisition>
+<Data Acquisition, connectedTo, Asteroid Mining Feasibility>
+<Data Acquisition, connectedTo, Astronaut Training>
+<Deep Space Communications, connectedTo, New Space Technology Development>
+<Extravehicular Activity Planning, connectedTo, Space Tourism Development>
+<Ground Station Operations, connectedTo, Deep Space Communications>
+<Ground Station Operations, connectedTo, Extravehicular Activity Planning>
+<In_Situ Resource Utilization, connectedTo, Satellite Deployment>
+<International Collaboration, connectedTo, Asteroid Mining Feasibility>
+<International Collaboration, connectedTo, Astronaut Training>
+<International Collaboration, connectedTo, Commercial Space Flight Regulation>
+<Launch Operations, connectedTo, Re_entry Vehicle Design>
+<Lunar Exploration, budgets, Space Habitat Development>
+<Mission Control Center Management, connectedTo, Satellite Deployment>
+<Mission Design, connectedTo, Payload Development>
+<Payload Development, connectedTo, Ground Station Operations>
+<Payload Development, connectedTo, Propellant Management>
+<Propellant Management, connectedTo, Spacecraft Control>
+<Re_entry Vehicle Design, connectedTo, Rocket Propulsion Development>
+<Rocket Propulsion Development, connectedTo, Deep Space Communications>
+<Rocket Propulsion Development, connectedTo, Ground Station Operations>
+<Rocket Propulsion Development, connectedTo, In_Situ Resource Utilization>
+<Rocket Propulsion Development, connectedTo, Mission Design>
+<Rocket Propulsion Development, connectedTo, New Space Technology Development>
+<Satellite Deployment, connectedTo, Mission Design>
+<Space Debris Mitigation, connectedTo, Mission Control Center Management>
+<Space Habitat Development, connectedTo, Deep Space Communications>
+<Space Tourism Development, connectedTo, Space Debris Mitigation>
+<Spacecraft Control, connectedTo, Lunar Exploration>
diff --git a/test/diagrams/scanned_hard/diagrams_281.txt b/test/diagrams/scanned_hard/diagrams_281.txt
new file mode 100644
index 0000000000000000000000000000000000000000..75533c47d412f2f6159a684a896c6bc7bbd7de0f
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_281.txt
@@ -0,0 +1,35 @@
+<Arctic Weather Research, connectedTo, Atmospheric Sounding>
+<Atmospheric Data Collection, calculates, Precipitation Measurement>
+<Atmospheric Data Collection, connectedTo, Climate Modeling>
+<Atmospheric Sounding, analyzes, Satellite Meteorology>
+<Atmospheric Sounding, connectedTo, Boundary Layer Study>
+<Atmospheric Sounding, connectedTo, Hurricane Trajectory Modeling>
+<Atmospheric Sounding, connectedTo, Snowfall Measurement>
+<Aviation Weather Briefing, connectedTo, Meteorological Station Maintenance>
+<Boundary Layer Study, connectedTo, Ocean_Atmosphere Interaction Study>
+<Boundary Layer Study, connectedTo, Temperature Monitoring>
+<Climate Change Impact Study, connectedTo, Aviation Weather Briefing>
+<Climate Change Impact Study, connectedTo, Boundary Layer Study>
+<Climate Data Archiving, connectedTo, Tropical Cyclone Analysis>
+<Climate Modeling, connectedTo, Humidity Sensing>
+<Drought Monitoring, connectedTo, Boundary Layer Study>
+<Drought Monitoring, connectedTo, Severe Weather Warning>
+<Flood Prediction, connectedTo, Climate Change Impact Study>
+<Humidity Sensing, connectedTo, Mesoscale Meteorology>
+<Hurricane Trajectory Modeling, connectedTo, Boundary Layer Study>
+<Hurricane Trajectory Modeling, connectedTo, Snowfall Measurement>
+<Mesoscale Meteorology, connectedTo, Hurricane Trajectory Modeling>
+<Meteorological Station Maintenance, connectedTo, Climate Data Archiving>
+<Ocean_Atmosphere Interaction Study, measures, Satellite Meteorology>
+<Precipitation Measurement, alerts, Flood Prediction>
+<Seasonal Outlook Preparation, connectedTo, Synoptic Chart Analysis>
+<Severe Weather Warning, connectedTo, Atmospheric Data Collection>
+<Snowfall Measurement, interprets, Boundary Layer Study>
+<Synoptic Chart Analysis, connectedTo, Arctic Weather Research>
+<Synoptic Chart Analysis, connectedTo, Atmospheric Sounding>
+<Synoptic Chart Analysis, connectedTo, Boundary Layer Study>
+<Synoptic Chart Analysis, connectedTo, Ocean_Atmosphere Interaction Study>
+<Temperature Monitoring, connectedTo, Upper Air Chart Analysis>
+<Tornado Watch or Warning, connectedTo, Seasonal Outlook Preparation>
+<Tropical Cyclone Analysis, connectedTo, Tornado Watch or Warning>
+<Upper Air Chart Analysis, connectedTo, Atmospheric Data Collection>
diff --git a/test/diagrams/scanned_hard/diagrams_283.txt b/test/diagrams/scanned_hard/diagrams_283.txt
new file mode 100644
index 0000000000000000000000000000000000000000..3efeb804c538d085603b46a1170ffd2079c70fbd
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_283.txt
@@ -0,0 +1,36 @@
+<Agricultural Water Use Efficiency, connectedTo, Desalination>
+<Climate Change Adaptation for Water, connectedTo, Public Awareness Campaigns>
+<Dam Management, connectedTo, Rainwater Harvesting>
+<Desalination, connectedTo, Dam Management>
+<Drinking Water Standards Compliance, connectedTo, Wastewater Treatment>
+<Drought Management, connectedTo, Hydroelectric Power Generation>
+<Drought Management, connectedTo, Public Awareness Campaigns>
+<Drought Management, connectedTo, Water Meter Reading>
+<Groundwater Management, connectedTo, Public Awareness Campaigns>
+<Groundwater Management, connectedTo, Water Infrastructure Maintenance>
+<Hydroelectric Power Generation, connectedTo, Public Awareness Campaigns>
+<Hydroelectric Power Generation, connectedTo, Watershed Management>
+<Industrial Water Use Optimization, connectedTo, Drinking Water Standards Compliance>
+<Irrigation Management, connectedTo, Drinking Water Standards Compliance>
+<Public Awareness Campaigns, analyzes, Desalination>
+<Public Awareness Campaigns, connectedTo, Agricultural Water Use Efficiency>
+<Public Awareness Campaigns, connectedTo, Industrial Water Use Optimization>
+<Public Awareness Campaigns, connectedTo, Water Scarcity Mitigation>
+<Rainwater Harvesting, connectedTo, Industrial Water Use Optimization>
+<Wastewater Collection, connectedTo, Water Quality Monitoring>
+<Wastewater Treatment, recycles, Water Distribution>
+<Water Conservation Planning, connectedTo, Groundwater Management>
+<Water Distribution, conserves, Water Scarcity Mitigation>
+<Water Infrastructure Maintenance, connectedTo, Water Loss Detection>
+<Water Infrastructure Maintenance, connectedTo, Water Scarcity Mitigation>
+<Water Infrastructure Maintenance, connectedTo, Watershed Management>
+<Water Infrastructure Maintenance, mitigates, Drought Management>
+<Water Infrastructure Maintenance, monitors, Agricultural Water Use Efficiency>
+<Water Loss Detection, connectedTo, Drought Management>
+<Water Meter Reading, connectedTo, Water Treatment>
+<Water Quality Monitoring, connectedTo, Irrigation Management>
+<Water Treatment, connectedTo, Climate Change Adaptation for Water>
+<Watershed Management, connectedTo, Dam Management>
+<Watershed Management, connectedTo, Wastewater Collection>
+<Watershed Management, connectedTo, Water Scarcity Mitigation>
+<Watershed Management, purifies, Climate Change Adaptation for Water>
diff --git a/test/diagrams/scanned_hard/diagrams_297.dot b/test/diagrams/scanned_hard/diagrams_297.dot
new file mode 100644
index 0000000000000000000000000000000000000000..20b5cd4a5e838c64a4af65a94631db5062e002ac
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_297.dot
@@ -0,0 +1,69 @@
+digraph {
+	rankdir=TB
+	N0 [label="Game Design" color="#DCE775" fillcolor="#FCFCE7" shape=document style=filled]
+	N1 [label="Monetization Strategy" color="#C0CA33" fillcolor="#F9FBE7" shape=inputoutput style=filled]
+	N2 [label="Player Progression Systems" color="#B0C5CD" fillcolor="#DFE7EB" shape=rect style=filled]
+	N3 [label="Quality Assurance Testing" color="#DCE775" fillcolor="#FCFCE7" shape=multipledocuments style=filled]
+	N4 [label="Voice Acting" color="#C0CA33" fillcolor="#F9FBE7" shape=action style=filled]
+	N5 [label="Sound Design" color="#B0C5CD" fillcolor="#DFE7EB" shape=database style=filled]
+	N6 [label="AI Behavior Programming" color="#DCE775" fillcolor="#FCFCE7" shape=multipledocuments style=filled]
+	N7 [label="Game Analytics" color="#C0CA33" fillcolor="#F9FBE7" shape=multipledocuments style=filled]
+	N8 [label="Localization" color="#DCE775" fillcolor="#FCFCE7" shape=database style=filled]
+	N9 [label="Community Management" color="#DCE775" fillcolor="#FCFCE7" shape=diamond style=filled]
+	N10 [label="Physics Simulation" color="#DCE775" fillcolor="#FCFCE7" shape=parallelogram style=filled]
+	N11 [label="Game Balancing" color="#DCE775" fillcolor="#FCFCE7" shape=preparation style=filled]
+	N12 [label="In_Game Economy Design" color="#DCE775" fillcolor="#FCFCE7" shape=diamond style=filled]
+	N13 [label="Storytelling" color="#DCE775" fillcolor="#FCFCE7" shape=vnode_shape style=filled]
+	S0 [label="" color="#B0C5CD" fillcolor="#DFE7EB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#B0C5CD" fillcolor="#DFE7EB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#B0C5CD" fillcolor="#DFE7EB" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#C0CA33" fillcolor="#F9FBE7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Virtual Reality Gaming {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Virtual Reality Gaming"
+		nest0_0 [label="Game Publishing" color="#B0C5CD" fillcolor="#DFE7EB" shape=parallelogram style=filled]
+		nest0_1 [label="User Experience Design" color="#DCE775" fillcolor="#FCFCE7" shape=ellipse style=filled]
+	}
+	subgraph cluster_Network Code Optimization {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Network Code Optimization"
+		nest1_0 [label="Marketing and Promotion" color="#B0C5CD" fillcolor="#DFE7EB" shape=inputoutput style=filled]
+		nest1_1 [label="Programming" color="#DCE775" fillcolor="#FCFCE7" shape=diamond style=filled]
+		nest1_2 [label="Multiplayer Game Development" color="#C0CA33" fillcolor="#F9FBE7" shape=ellipse style=filled]
+	}
+	N0 -> N1 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#C0CA33" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#B0C5CD" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=dashed label="renders" dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#B0C5CD" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#C0CA33" penwidth=1.5 style=dashed dir=forward]
+	N10 -> N11 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#000000" penwidth=1.5 style=solid label="regulates" dir=forward]
+	N12 -> N13 [color="#DCE775" penwidth=1.5 style=solid label="streams" dir=forward]
+	nest0_0 -> nest0_1 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	N10 -> nest0_0 [color="#C0CA33" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> N6 [color="#C0CA33" penwidth=1.5 style=solid dir=forward]
+	nest1_0 -> nest1_1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> nest1_2 [color="#000000" penwidth=1.5 style=solid label="competes" dir=forward]
+	N5 -> nest1_0 [color="#C0CA33" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> N10 [color="#C0CA33" penwidth=1.5 style=solid dir=forward]
+	N3 -> S0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N10 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N11 [color="#C0CA33" penwidth=1.5 style=solid dir=forward]
+	N1 -> S1 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N3 [color="#B0C5CD" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N11 [color="#B0C5CD" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N10 [color="#C0CA33" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N6 -> M0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N12 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M1 [color="#C0CA33" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M1 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	M1 -> N6 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_297.txt b/test/diagrams/scanned_hard/diagrams_297.txt
new file mode 100644
index 0000000000000000000000000000000000000000..47b500c0005f0106da3b36ccc0de7efb37b5bc48
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_297.txt
@@ -0,0 +1,29 @@
+<AI Behavior Programming, connectedTo, Game Analytics>
+<AI Behavior Programming, connectedTo, In_Game Economy Design>
+<Community Management, connectedTo, Physics Simulation>
+<Game Analytics, connectedTo, Localization>
+<Game Balancing, regulates, In_Game Economy Design>
+<Game Design, connectedTo, Monetization Strategy>
+<Game Publishing, connectedTo, User Experience Design>
+<In_Game Economy Design, streams, Storytelling>
+<Localization, connectedTo, Community Management>
+<Marketing and Promotion, connectedTo, Programming>
+<Monetization Strategy, connectedTo, Game Balancing>
+<Monetization Strategy, connectedTo, In_Game Economy Design>
+<Monetization Strategy, connectedTo, Physics Simulation>
+<Monetization Strategy, connectedTo, Player Progression Systems>
+<Monetization Strategy, connectedTo, Quality Assurance Testing>
+<Multiplayer Game Development, connectedTo, Physics Simulation>
+<Physics Simulation, connectedTo, Game Balancing>
+<Physics Simulation, connectedTo, Game Publishing>
+<Player Progression Systems, connectedTo, AI Behavior Programming>
+<Player Progression Systems, connectedTo, Quality Assurance Testing>
+<Programming, competes, Multiplayer Game Development>
+<Quality Assurance Testing, connectedTo, AI Behavior Programming>
+<Quality Assurance Testing, connectedTo, Game Balancing>
+<Quality Assurance Testing, connectedTo, Physics Simulation>
+<Quality Assurance Testing, renders, Voice Acting>
+<Sound Design, connectedTo, AI Behavior Programming>
+<Sound Design, connectedTo, Marketing and Promotion>
+<User Experience Design, connectedTo, AI Behavior Programming>
+<Voice Acting, connectedTo, Sound Design>
diff --git a/test/diagrams/scanned_hard/diagrams_298.txt b/test/diagrams/scanned_hard/diagrams_298.txt
new file mode 100644
index 0000000000000000000000000000000000000000..d76df328deaef8f8c93e04ed7df1efb1ab5e394d
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_298.txt
@@ -0,0 +1,26 @@
+<Artist Management, connectedTo, Copyright Management>
+<Composition, reviews, Music Video Production>
+<Copyright Management, connectedTo, Record Label Operations>
+<Crowdfunding for Music Projects, connectedTo, Performance>
+<Digital Audio Workstation Operation, connectedTo, Composition>
+<Digital Audio Workstation Operation, connectedTo, Music for Film or TV or Games>
+<Fan Engagement Strategy, connectedTo, Composition>
+<Fan Engagement Strategy, connectedTo, Vocal Performance>
+<Mastering, connectedTo, Music for Film or TV or Games>
+<Merchandise Sales, connectedTo, Composition>
+<Merchandise Sales, distributes, Fan Engagement Strategy>
+<Mixing, connectedTo, Merchandise Sales>
+<Music Festival Organization, connectedTo, Sound Design for Media>
+<Music Festival Organization, integrates, Royalty Collection>
+<Music Festival Organization, records, Crowdfunding for Music Projects>
+<Music Video Production, connectedTo, Mastering>
+<Music Video Production, performs, Music for Film or TV or Games>
+<Music for Film or TV or Games, connectedTo, Music Festival Organization>
+<Performance, connectedTo, Vocal Performance>
+<Royalty Collection, connectedTo, Streaming Platform Management>
+<Sound Design for Media, connectedTo, Artist Management>
+<Sound Design for Media, connectedTo, Copyright Management>
+<Sound Design for Media, manages, Record Label Operations>
+<Streaming Platform Management, connectedTo, Composition>
+<Vocal Performance, connectedTo, Composition>
+<Vocal Performance, connectedTo, Digital Audio Workstation Operation>
diff --git a/test/diagrams/scanned_hard/diagrams_311.dot b/test/diagrams/scanned_hard/diagrams_311.dot
new file mode 100644
index 0000000000000000000000000000000000000000..fe7d050b3055ea9c2d5c19fc9a05f7c9e3b5ea12
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_311.dot
@@ -0,0 +1,89 @@
+digraph {
+	rankdir=LR
+	N0 [label="Backup and Recovery Systems" color="#CFCFCF" fillcolor="#F6F6F6" shape=preparation style=filled]
+	N1 [label="Data Center Management" color="#DCE775" fillcolor="#F9FBE7" shape=multipledocuments style=filled]
+	N2 [label="Group Policy Management" color="#DCE775" fillcolor="#F9FBE7" shape=predefinedprocess style=filled]
+	N3 [label="Network Design" color="#DCE775" fillcolor="#F9FBE7" shape=predefinedprocess style=filled]
+	N4 [label="Access Control Systems" color="#CFCFCF" fillcolor="#F6F6F6" shape=multipledocuments style=filled]
+	N5 [label="Automation Scripting" color="#DCE775" fillcolor="#F9FBE7" shape=rect style=filled]
+	N6 [label="Proxy Server Configuration" color="#FFD54F" fillcolor="#FFF8E1" shape=document style=filled]
+	N7 [label="Environmental Monitoring" color="#FFD54F" fillcolor="#FFF8E1" shape=document style=filled]
+	N8 [label="Capacity Planning" color="#CFCFCF" fillcolor="#F6F6F6" shape=rect style=filled]
+	N9 [label="Rack and Cabinet Management" color="#FFD54F" fillcolor="#FFF8E1" shape=rectangle style=filled]
+	N10 [label="Power and Cooling Management" color="#CFCFCF" fillcolor="#F6F6F6" shape=hexagon style=filled]
+	N11 [label="DNS Management" color="#CFCFCF" fillcolor="#F6F6F6" shape=inputoutput style=filled]
+	N12 [label="Monitoring and Alerting" color="#FFD54F" fillcolor="#FFF8E1" shape=predefinedprocess style=filled]
+	N13 [label="Mail Server Management" color="#FFD54F" fillcolor="#FFF8E1" shape=rect style=filled]
+	N14 [label="Remote Access Solutions" color="#CFCFCF" fillcolor="#F6F6F6" shape=ellipse style=filled]
+	N15 [label="Load Balancer Setup" color="#FFD54F" fillcolor="#FFF8E1" shape=diamond style=filled]
+	N16 [label="Antivirus and Endpoint Protection" color="#CFCFCF" fillcolor="#F6F6F6" shape=vnode_shape style=filled]
+	N17 [label="Software Licensing Management" color="#CFCFCF" fillcolor="#F6F6F6" shape=parallelogram style=filled]
+	N18 [label="Virtualization" color="#FFD54F" fillcolor="#FFF8E1" shape=box style=filled]
+	S0 [label="" color="#FFD54F" fillcolor="#FFF8E1" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#FFD54F" fillcolor="#FFF8E1" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#CFCFCF" fillcolor="#F6F6F6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#DCE775" fillcolor="#F9FBE7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M2 [label="" color="#CFCFCF" fillcolor="#F6F6F6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Network Performance Tuning {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Network Performance Tuning"
+		nest0_0 [label="Operating System Installation" color="#CFCFCF" fillcolor="#F6F6F6" shape=action style=filled]
+		nest0_1 [label="IT Asset Management" color="#FFD54F" fillcolor="#FFF8E1" shape=action style=filled]
+	}
+	subgraph cluster_Firewall Management {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Firewall Management"
+		nest1_0 [label="Hardware Maintenance" color="#CFCFCF" fillcolor="#F6F6F6" shape=action style=filled]
+		nest1_1 [label="Disaster Recovery Planning" color="#CFCFCF" fillcolor="#F6F6F6" shape=action style=filled]
+		nest1_2 [label="Hardware Procurement" color="#CFCFCF" fillcolor="#F6F6F6" shape=multipledocuments style=filled]
+		nest1_3 [label="Troubleshooting and Support" color="#DCE775" fillcolor="#F9FBE7" shape=preparation style=filled]
+	}
+	N0 -> N1 [color="#CFCFCF" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#CFCFCF" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#CFCFCF" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	N12 -> N13 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	N13 -> N14 [color="#FFD54F" penwidth=1.5 style=solid dir=forward]
+	N14 -> N15 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	N15 -> N16 [color="#FFD54F" penwidth=1.5 style=solid dir=forward]
+	N16 -> N17 [color="#FFD54F" penwidth=1.5 style=solid dir=forward]
+	N17 -> N18 [color="#CFCFCF" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	N9 -> nest0_0 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> N8 [color="#CFCFCF" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#CFCFCF" penwidth=1.5 style=solid label="tracks assets" dir=forward]
+	nest1_1 -> nest1_2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> nest1_3 [color="#CFCFCF" penwidth=1.5 style=dashed dir=forward]
+	N14 -> nest1_0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest1_3 -> N12 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N10 -> S0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N18 [color="#FFD54F" penwidth=1.5 style=dashed label="lays cables" dir=forward]
+	S0 -> N16 [color="#CFCFCF" penwidth=1.5 style=dashed label="configures web servers" dir=forward]
+	N1 -> S1 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N17 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N13 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	S1 -> N9 [color="#DCE775" penwidth=1.5 style=dashed label="configures firewalls" dir=forward]
+	S1 -> N3 [color="#CFCFCF" penwidth=1.5 style=solid dir=forward]
+	N5 -> M0 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M0 [color="#CFCFCF" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N1 -> M0 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	M0 -> N7 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	N1 -> M1 [color="#DCE775" penwidth=1.5 style=solid dir=forward]
+	N0 -> M1 [color="#CFCFCF" penwidth=1.5 style=solid label="installs racks" dir=forward]
+	M1 -> N3 [color="#FFD54F" penwidth=1.5 style=solid dir=forward]
+	N0 -> M2 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+	N13 -> M2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N10 -> M2 [color="#FFD54F" penwidth=1.5 style=dashed dir=forward]
+	M2 -> N18 [color="#DCE775" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_311.txt b/test/diagrams/scanned_hard/diagrams_311.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6bf69fe4e58281f4bac6d6dd9654c7875ef8fdd9
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_311.txt
@@ -0,0 +1,40 @@
+<Access Control Systems, connectedTo, Automation Scripting>
+<Antivirus and Endpoint Protection, connectedTo, Software Licensing Management>
+<Automation Scripting, connectedTo, Environmental Monitoring>
+<Automation Scripting, connectedTo, Proxy Server Configuration>
+<Backup and Recovery Systems, connectedTo, Data Center Management>
+<Backup and Recovery Systems, connectedTo, Virtualization>
+<Backup and Recovery Systems, installs racks, Network Design>
+<Capacity Planning, connectedTo, Rack and Cabinet Management>
+<DNS Management, connectedTo, Monitoring and Alerting>
+<Data Center Management, configures firewalls, Rack and Cabinet Management>
+<Data Center Management, connectedTo, Environmental Monitoring>
+<Data Center Management, connectedTo, Group Policy Management>
+<Data Center Management, connectedTo, Mail Server Management>
+<Data Center Management, connectedTo, Network Design>
+<Data Center Management, connectedTo, Software Licensing Management>
+<Disaster Recovery Planning, connectedTo, Hardware Procurement>
+<Environmental Monitoring, connectedTo, Capacity Planning>
+<Group Policy Management, connectedTo, Environmental Monitoring>
+<Group Policy Management, connectedTo, Network Design>
+<Hardware Maintenance, tracks assets, Disaster Recovery Planning>
+<Hardware Procurement, connectedTo, Troubleshooting and Support>
+<IT Asset Management, connectedTo, Capacity Planning>
+<Load Balancer Setup, connectedTo, Antivirus and Endpoint Protection>
+<Mail Server Management, connectedTo, Remote Access Solutions>
+<Mail Server Management, connectedTo, Virtualization>
+<Monitoring and Alerting, connectedTo, Mail Server Management>
+<Network Design, connectedTo, Access Control Systems>
+<Network Design, connectedTo, Environmental Monitoring>
+<Operating System Installation, connectedTo, IT Asset Management>
+<Power and Cooling Management, configures web servers, Antivirus and Endpoint Protection>
+<Power and Cooling Management, connectedTo, DNS Management>
+<Power and Cooling Management, connectedTo, Virtualization>
+<Power and Cooling Management, lays cables, Virtualization>
+<Proxy Server Configuration, connectedTo, Environmental Monitoring>
+<Rack and Cabinet Management, connectedTo, Operating System Installation>
+<Rack and Cabinet Management, connectedTo, Power and Cooling Management>
+<Remote Access Solutions, connectedTo, Hardware Maintenance>
+<Remote Access Solutions, connectedTo, Load Balancer Setup>
+<Software Licensing Management, connectedTo, Virtualization>
+<Troubleshooting and Support, connectedTo, Monitoring and Alerting>
diff --git a/test/diagrams/scanned_hard/diagrams_313.txt b/test/diagrams/scanned_hard/diagrams_313.txt
new file mode 100644
index 0000000000000000000000000000000000000000..cf38adadade7382ad9bcbd8032184d99e5003a05
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_313.txt
@@ -0,0 +1,29 @@
+<Cloud_Native Development, connectedTo, API Development>
+<Code Review, connectedTo, Maintenance>
+<Code Review, connectedTo, Mobile Application Development>
+<Coding, connectedTo, Testing Frameworks>
+<Data Structures Implementation, connectedTo, Deployment>
+<Database Design, connectedTo, Integration Testing>
+<Database Design, connectedTo, Maintenance>
+<Deployment, connectedTo, Coding>
+<Desktop Application Development, connectedTo, Technical Debt Management>
+<Game Development, connectedTo, Desktop Application Development>
+<Integration Testing, connectedTo, Game Development>
+<Integration Testing, connectedTo, Performance Optimization>
+<Maintenance, connectedTo, System Design>
+<Microservices Architecture, connectedTo, Integration Testing>
+<Microservices Architecture, connectedTo, Maintenance>
+<Microservices Architecture, connectedTo, Web Application Development>
+<Mobile Application Development, connectedTo, Data Structures Implementation>
+<Mobile Application Development, connectedTo, Maintenance>
+<Mobile Application Development, connectedTo, Microservices Architecture>
+<Performance Optimization, connectedTo, Cloud_Native Development>
+<System Design, connectedTo, API Development>
+<System Design, connectedTo, Cloud_Native Development>
+<System Design, connectedTo, Integration Testing>
+<System Design, connectedTo, Performance Optimization>
+<Technical Debt Management, connectedTo, Microservices Architecture>
+<Testing Frameworks, connectedTo, Mobile Application Development>
+<Web Application Development, connectedTo, Database Design>
+<Web Application Development, connectedTo, Integration Testing>
+<Web Application Development, connectedTo, Maintenance>
diff --git a/test/diagrams/scanned_hard/diagrams_322.dot b/test/diagrams/scanned_hard/diagrams_322.dot
new file mode 100644
index 0000000000000000000000000000000000000000..3126f93dcac49b720c835bd85f8e03bb5beab689
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_322.dot
@@ -0,0 +1,65 @@
+digraph {
+	rankdir=TB
+	N0 [label="Children's Language Learning" color="#FF8A65" fillcolor="#FBE9E7" shape=box style=filled]
+	N1 [label="Error Correction Feedback" color="#4CAF50" fillcolor="#C8E6C9" shape=document style=filled]
+	N2 [label="Slang and Idioms Learning" color="#00BCD4" fillcolor="#E0F7FA" shape=predefinedprocess style=filled]
+	N3 [label="Audio Lessons" color="#4CAF50" fillcolor="#C8E6C9" shape=rect style=filled]
+	N4 [label="Speaking Practice" color="#00BCD4" fillcolor="#E0F7FA" shape=vnode_shape style=filled]
+	N5 [label="Immersion Programs" color="#4CAF50" fillcolor="#C8E6C9" shape=hexagon style=filled]
+	N6 [label="Language Exchange Programs" color="#00BCD4" fillcolor="#E0F7FA" shape=predefinedprocess style=filled]
+	N7 [label="Language for Specific Purposes" color="#4CAF50" fillcolor="#C8E6C9" shape=database style=filled]
+	N8 [label="Interactive Dialogues" color="#FF8A65" fillcolor="#FBE9E7" shape=diamond style=filled]
+	N9 [label="Self_Study Modules" color="#00BCD4" fillcolor="#E0F7FA" shape=predefinedprocess style=filled]
+	N10 [label="Listening Comprehension" color="#00BCD4" fillcolor="#E0F7FA" shape=box style=filled]
+	N11 [label="Pronunciation Drills" color="#FF8A65" fillcolor="#FBE9E7" shape=preparation style=filled]
+	N12 [label="Accent Reduction Coaching" color="#00BCD4" fillcolor="#E0F7FA" shape=parallelogram style=filled]
+	S0 [label="" color="#4CAF50" fillcolor="#C8E6C9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#FF8A65" fillcolor="#FBE9E7" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#4CAF50" fillcolor="#C8E6C9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Flashcard Systems {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Flashcard Systems"
+		nest0_0 [label="AI_Powered Language Tutors" color="#00BCD4" fillcolor="#E0F7FA" shape=ellipse style=filled]
+		nest0_1 [label="Speech Recognition Technology" color="#4CAF50" fillcolor="#C8E6C9" shape=action style=filled]
+	}
+	subgraph cluster_Personalized Learning Paths {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Personalized Learning Paths"
+		nest1_0 [label="Contextual Learning" color="#4CAF50" fillcolor="#C8E6C9" shape=inputoutput style=filled]
+		nest1_1 [label="Virtual Reality Language Environments" color="#4CAF50" fillcolor="#C8E6C9" shape=vnode_shape style=filled]
+		nest1_2 [label="Video Lessons" color="#FF8A65" fillcolor="#FBE9E7" shape=document style=filled]
+		nest1_3 [label="Curriculum Customization" color="#4CAF50" fillcolor="#C8E6C9" shape=database style=filled]
+	}
+	N0 -> N1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#4CAF50" penwidth=1.5 style=solid label="certifies" dir=forward]
+	N2 -> N3 [color="#FF8A65" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#00BCD4" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#00BCD4" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#00BCD4" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#4CAF50" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#4CAF50" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#4CAF50" penwidth=1.5 style=dashed dir=forward]
+	N6 -> nest0_0 [color="#00BCD4" penwidth=1.5 style=dashed label="publishes" dir=forward]
+	nest0_1 -> N11 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#00BCD4" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> nest1_2 [color="#FF8A65" penwidth=1.5 style=dashed dir=forward]
+	nest1_2 -> nest1_3 [color="#FF8A65" penwidth=1.5 style=dashed dir=forward]
+	N3 -> nest1_0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest1_3 -> N3 [color="#00BCD4" penwidth=1.5 style=solid dir=forward]
+	N5 -> S0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N8 [color="#00BCD4" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N12 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N0 -> S1 [color="#4CAF50" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N7 [color="#00BCD4" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N12 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M1 [color="#00BCD4" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M1 [color="#4CAF50" penwidth=1.5 style=solid dir=forward]
+	M1 -> N7 [color="#00BCD4" penwidth=1.5 style=solid dir=forward]
+	N3 -> N9 [color="#4CAF50" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_322.txt b/test/diagrams/scanned_hard/diagrams_322.txt
new file mode 100644
index 0000000000000000000000000000000000000000..666f7db94fa9907609a29960e5a9543bb5d3813e
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_322.txt
@@ -0,0 +1,26 @@
+<AI_Powered Language Tutors, connectedTo, Speech Recognition Technology>
+<Audio Lessons, connectedTo, Contextual Learning>
+<Audio Lessons, connectedTo, Self_Study Modules>
+<Audio Lessons, connectedTo, Speaking Practice>
+<Children's Language Learning, connectedTo, Accent Reduction Coaching>
+<Children's Language Learning, connectedTo, Error Correction Feedback>
+<Children's Language Learning, connectedTo, Language for Specific Purposes>
+<Contextual Learning, connectedTo, Virtual Reality Language Environments>
+<Curriculum Customization, connectedTo, Audio Lessons>
+<Error Correction Feedback, certifies, Slang and Idioms Learning>
+<Immersion Programs, connectedTo, Accent Reduction Coaching>
+<Immersion Programs, connectedTo, Interactive Dialogues>
+<Immersion Programs, connectedTo, Language Exchange Programs>
+<Interactive Dialogues, connectedTo, Self_Study Modules>
+<Language Exchange Programs, connectedTo, Language for Specific Purposes>
+<Language Exchange Programs, publishes, AI_Powered Language Tutors>
+<Language for Specific Purposes, connectedTo, Interactive Dialogues>
+<Listening Comprehension, connectedTo, Pronunciation Drills>
+<Pronunciation Drills, connectedTo, Accent Reduction Coaching>
+<Self_Study Modules, connectedTo, Listening Comprehension>
+<Slang and Idioms Learning, connectedTo, Audio Lessons>
+<Slang and Idioms Learning, connectedTo, Language for Specific Purposes>
+<Speaking Practice, connectedTo, Immersion Programs>
+<Speech Recognition Technology, connectedTo, Pronunciation Drills>
+<Video Lessons, connectedTo, Curriculum Customization>
+<Virtual Reality Language Environments, connectedTo, Video Lessons>
diff --git a/test/diagrams/scanned_hard/diagrams_323.txt b/test/diagrams/scanned_hard/diagrams_323.txt
new file mode 100644
index 0000000000000000000000000000000000000000..fd06f83ea3d3763b2f30cd2161ca82b90d79799a
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_323.txt
@@ -0,0 +1,35 @@
+<Anxiety Management, connectedTo, Family Therapy>
+<Anxiety Management, connectedTo, Peer Support Programs>
+<Art Therapy, connectedTo, Support Group Facilitation>
+<Cognitive Behavioral Therapy, connectedTo, Mental Health Education>
+<Counseling Services, connectedTo, Trauma Therapy>
+<Crisis Intervention, relieves, Emotional Regulation Training>
+<Diagnosis and Assessment, connectedTo, Dialectical Behavior Therapy>
+<Diagnosis and Assessment, connectedTo, Therapy Session>
+<Diagnosis and Assessment, connectedTo, Trauma Therapy>
+<Dialectical Behavior Therapy, connectedTo, Workplace Mental Health Programs>
+<Digital Mental Health Tools, connectedTo, Art Therapy>
+<Emotional Regulation Training, connectedTo, Mental Health Education>
+<Emotional Regulation Training, connectedTo, Outpatient Program Management>
+<Emotional Regulation Training, connectedTo, Substance Abuse Counseling>
+<Family Therapy, connectedTo, Crisis Intervention>
+<Family Therapy, connectedTo, Mental Health Education>
+<Family Therapy, connectedTo, Outpatient Program Management>
+<Family Therapy, connectedTo, Substance Abuse Counseling>
+<Group Therapy, connectedTo, Anxiety Management>
+<Outpatient Program Management, connectedTo, Cognitive Behavioral Therapy>
+<Peer Support Programs, connectedTo, Digital Mental Health Tools>
+<Psychiatric Evaluation, connectedTo, Substance Abuse Counseling>
+<Recreational Therapy, connectedTo, Anxiety Management>
+<Recreational Therapy, connectedTo, Schizophrenia Management>
+<Schizophrenia Management, connectedTo, Group Therapy>
+<Substance Abuse Counseling, connectedTo, Outpatient Program Management>
+<Suicide Prevention, connectedTo, Diagnosis and Assessment>
+<Suicide Prevention, connectedTo, Trauma Therapy>
+<Support Group Facilitation, connectedTo, Family Therapy>
+<Telehealth Counseling, connectedTo, Suicide Prevention>
+<Telehealth Counseling, connectedTo, Trauma Therapy>
+<Therapy Session, connectedTo, Counseling Services>
+<Trauma Therapy, connectedTo, Anxiety Management>
+<Trauma Therapy, connectedTo, Recreational Therapy>
+<Workplace Mental Health Programs, connectedTo, Psychiatric Evaluation>
diff --git a/test/diagrams/scanned_hard/diagrams_325.dot b/test/diagrams/scanned_hard/diagrams_325.dot
new file mode 100644
index 0000000000000000000000000000000000000000..96ea5d0e725c74e28affb068530473a2f27c0b87
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_325.dot
@@ -0,0 +1,67 @@
+digraph {
+	rankdir=LR
+	N0 [label="Rehabilitation Exercises" color="#80DDEA" fillcolor="#D3F7F9" shape=document style=filled]
+	N1 [label="Fitness Equipment Maintenance" color="#FFB74D" fillcolor="#FFF3E0" shape=rect style=filled]
+	N2 [label="Posture Correction" color="#80DDEA" fillcolor="#D3F7F9" shape=ellipse style=filled]
+	N3 [label="Cardiovascular Training" color="#388E3C" fillcolor="#F1F8E9" shape=document style=filled]
+	N4 [label="Workout Tracking Apps" color="#FFB74D" fillcolor="#FFF3E0" shape=action style=filled]
+	N5 [label="Home Workout Programs" color="#FFB74D" fillcolor="#FFF3E0" shape=ellipse style=filled]
+	N6 [label="Pilates Instruction" color="#FFB74D" fillcolor="#FFF3E0" shape=database style=filled]
+	N7 [label="Running Coaching" color="#388E3C" fillcolor="#F1F8E9" shape=ellipse style=filled]
+	N8 [label="Group Fitness Classes" color="#80DDEA" fillcolor="#D3F7F9" shape=rect style=filled]
+	S0 [label="" color="#80DDEA" fillcolor="#D3F7F9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#FFB74D" fillcolor="#FFF3E0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#FFB74D" fillcolor="#FFF3E0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#80DDEA" fillcolor="#D3F7F9" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Outdoor Fitness Activities {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Outdoor Fitness Activities"
+		nest0_0 [label="Sports_Specific Training" color="#80DDEA" fillcolor="#D3F7F9" shape=database style=filled]
+		nest0_1 [label="Personal Training" color="#FFB74D" fillcolor="#FFF3E0" shape=hexagon style=filled]
+		nest0_2 [label="HIIT Workouts" color="#80DDEA" fillcolor="#D3F7F9" shape=ellipse style=filled]
+		nest0_3 [label="Personalized Exercise Prescriptions" color="#388E3C" fillcolor="#F1F8E9" shape=diamond style=filled]
+	}
+	subgraph cluster_Injury Prevention {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Injury Prevention"
+		nest1_0 [label="Motivation and Goal Setting" color="#FFB74D" fillcolor="#FFF3E0" shape=document style=filled]
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+		nest1_3 [label="Workout Planning" color="#80DDEA" fillcolor="#D3F7F9" shape=document style=filled]
+	}
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+	N1 -> S0 [color="#FFB74D" penwidth=1.5 style=solid dir=forward]
+	S0 -> N5 [color="#80DDEA" penwidth=1.5 style=solid dir=forward]
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+	S0 -> N4 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N8 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	N3 -> S1 [color="#80DDEA" penwidth=1.5 style=solid dir=forward]
+	S1 -> N6 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	S1 -> N7 [color="#80DDEA" penwidth=1.5 style=dashed dir=forward]
+	N5 -> S2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	S2 -> N7 [color="#388E3C" penwidth=1.5 style=solid dir=forward]
+	S2 -> N8 [color="#388E3C" penwidth=1.5 style=solid label="analyzes" dir=forward]
+	N2 -> M1 [color="#80DDEA" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M1 [color="#000000" penwidth=1.5 style=dashed dir=forward]
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+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_33.dot b/test/diagrams/scanned_hard/diagrams_33.dot
new file mode 100644
index 0000000000000000000000000000000000000000..9237b8f9dbd688b413c6810426ac9c24cb63987a
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_33.dot
@@ -0,0 +1,24 @@
+digraph {
+	rankdir=BT
+	N0 [label="Disciplinary Procedures" color="#73C6BC" fillcolor="#D0EFEE" shape=database style=filled]
+	N1 [label="Organizational Development" color="#CDDC39" fillcolor="#E6EE9C" shape=hexagon style=filled]
+	N2 [label="Employee Handbook Creation" color="#CDDC39" fillcolor="#E6EE9C" shape=multipledocuments style=filled]
+	N3 [label="HR Analytics" color="#FBC02D" fillcolor="#FFFDE7" shape=box style=filled]
+	N4 [label="Leave Management" color="#CDDC39" fillcolor="#E6EE9C" shape=box style=filled]
+	N5 [label="Workforce Planning" color="#FBC02D" fillcolor="#FFFDE7" shape=action style=filled]
+	N6 [label="Change Management" color="#73C6BC" fillcolor="#D0EFEE" shape=document style=filled]
+	N7 [label="Recruitment Planning" color="#CDDC39" fillcolor="#E6EE9C" shape=hexagon style=filled]
+	N8 [label="HR Information System Implementation" color="#CDDC39" fillcolor="#E6EE9C" shape=multipledocuments style=filled]
+	N9 [label="Grievance Handling" color="#73C6BC" fillcolor="#D0EFEE" shape=hexagon style=filled]
+	N0 -> N1 [color="#FBC02D" penwidth=1.5 style=solid dir=forward]
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+	N2 -> N3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#FBC02D" penwidth=1.5 style=solid dir=forward]
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+	N5 -> N6 [color="#CDDC39" penwidth=1.5 style=dashed label="strategies" dir=forward]
+	N6 -> N7 [color="#CDDC39" penwidth=1.5 style=solid label="onboards" dir=forward]
+	N7 -> N8 [color="#CDDC39" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#CDDC39" penwidth=1.5 style=dashed label="develops" dir=forward]
+	N8 -> N4 [color="#73C6BC" penwidth=1.5 style=dashed label="reports" dir=forward]
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+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_330.txt b/test/diagrams/scanned_hard/diagrams_330.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7c68b1d49eb0c3205a89192431b7db226ee30595
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_330.txt
@@ -0,0 +1,23 @@
+<Cybersecurity for AVs, connectedTo, Human_Machine Interface>
+<Decision_Making Algorithms, connectedTo, Parking Assistance Systems>
+<Driver Monitoring Systems, connectedTo, Hardware Design>
+<Ethical Decision_Making, connectedTo, Redundancy in Sensors>
+<Hardware Design, connectedTo, Decision_Making Algorithms>
+<Human_Machine Interface, connectedTo, Regulatory Compliance>
+<Insurance Models for AVs, connectedTo, Cybersecurity for AVs>
+<Insurance Models for AVs, connectedTo, Decision_Making Algorithms>
+<Insurance Models for AVs, connectedTo, Ethical Decision_Making>
+<Insurance Models for AVs, connectedTo, Parking Assistance Systems>
+<Insurance Models for AVs, connectedTo, Redundancy in Sensors>
+<Lane Keeping Assist, connectedTo, Driver Monitoring Systems>
+<Lane Keeping Assist, connectedTo, Insurance Models for AVs>
+<Motion Control, connectedTo, Decision_Making Algorithms>
+<Motion Control, connectedTo, Insurance Models for AVs>
+<Motion Control, connectedTo, Parking Assistance Systems>
+<Motion Control, connectedTo, Pedestrian Detection>
+<Motion Control, connectedTo, Simulation Environment Development>
+<Parking Assistance Systems, connectedTo, Ethical Decision_Making>
+<Pedestrian Detection, connectedTo, Simulation Environment Development>
+<Regulatory Compliance, connectedTo, Sensor Integration>
+<Sensor Integration, connectedTo, Pedestrian Detection>
+<Simulation Environment Development, connectedTo, Lane Keeping Assist>
diff --git a/test/diagrams/scanned_hard/diagrams_331.txt b/test/diagrams/scanned_hard/diagrams_331.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0da8e4e539b555b47b8bede62963132391b7e139
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_331.txt
@@ -0,0 +1,33 @@
+<Car_sharing Services, connectedTo, Vehicle Booking>
+<Customer Support, connectedTo, Parking Integration>
+<Data Analytics for Usage Patterns, connectedTo, Regulatory Compliance>
+<Driver Management, connectedTo, Route Optimization>
+<First_Mile or Last_Mile Solutions, connectedTo, Policy Advocacy for Shared Mobility>
+<Fleet Management, connectedTo, Payment Processing>
+<Fraud Prevention, connectedTo, Maintenance Scheduling>
+<Fraud Prevention, connectedTo, Parking Integration>
+<Maintenance Scheduling, connectedTo, Customer Support>
+<Maintenance Scheduling, connectedTo, Parking Integration>
+<Parking Integration, connectedTo, Car_sharing Services>
+<Parking Integration, connectedTo, Payment Processing>
+<Parking Integration, connectedTo, User Onboarding>
+<Parking Integration, connectedTo, User Registration>
+<Payment Processing, connectedTo, User Rating and Feedback Systems>
+<Payment Processing, connectedTo, Vehicle Location Tracking>
+<Policy Advocacy for Shared Mobility, connectedTo, Data Analytics for Usage Patterns>
+<Regulatory Compliance, connectedTo, User Registration>
+<Route Optimization, connectedTo, Regulatory Compliance>
+<Subscription Model Management, connectedTo, User Rating and Feedback Systems>
+<Ticketing and Fare Collection, connectedTo, Fleet Management>
+<Ticketing and Fare Collection, connectedTo, User Rating and Feedback Systems>
+<User Onboarding, connectedTo, First_Mile or Last_Mile Solutions>
+<User Rating and Feedback Systems, connectedTo, Carbon Emission Tracking>
+<User Rating and Feedback Systems, connectedTo, Driver Management>
+<User Registration, connectedTo, Subscription Model Management>
+<User Registration, connectedTo, User Rating and Feedback Systems>
+<Vehicle Booking, connectedTo, Payment Processing>
+<Vehicle Booking, connectedTo, Ticketing and Fare Collection>
+<Vehicle Booking, connectedTo, User Rating and Feedback Systems>
+<Vehicle Location Tracking, connectedTo, Regulatory Compliance>
+<Vehicle Location Tracking, connectedTo, User Rating and Feedback Systems>
+<Vehicle Location Tracking, connectedTo, User Registration>
diff --git a/test/diagrams/scanned_hard/diagrams_335.dot b/test/diagrams/scanned_hard/diagrams_335.dot
new file mode 100644
index 0000000000000000000000000000000000000000..a3dcd7c1b8637dce03d68bd05ab8247cc1fb77ff
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_335.dot
@@ -0,0 +1,69 @@
+digraph {
+	rankdir=TB
+	N0 [label="Impact Assessment" color="#00BCD4" fillcolor="#B2EBF2" shape=rectangle style=filled]
+	N1 [label="Policy Evaluation" color="#7E57C2" fillcolor="#EDE7F6" shape=box style=filled]
+	N2 [label="Policy Advocacy and Lobbying" color="#FFC2C2" fillcolor="#FFEBEB" shape=action style=filled]
+	N3 [label="Public Consultation Process" color="#FFC2C2" fillcolor="#FFEBEB" shape=database style=filled]
+	N4 [label="Monitoring and Evaluation Framework" color="#00BCD4" fillcolor="#B2EBF2" shape=ellipse style=filled]
+	N5 [label="Behavioral Economics in Policy" color="#FFC2C2" fillcolor="#FFEBEB" shape=parallelogram style=filled]
+	N6 [label="Legal Review" color="#FFC2C2" fillcolor="#FFEBEB" shape=predefinedprocess style=filled]
+	N7 [label="Communication Strategy" color="#7E57C2" fillcolor="#EDE7F6" shape=parallelogram style=filled]
+	N8 [label="International Policy Analysis" color="#7E57C2" fillcolor="#EDE7F6" shape=rect style=filled]
+	N9 [label="Policy Learning" color="#FFC2C2" fillcolor="#FFEBEB" shape=preparation style=filled]
+	N10 [label="Feasibility Study" color="#00BCD4" fillcolor="#B2EBF2" shape=action style=filled]
+	N11 [label="Evidence_Based Policymaking" color="#00BCD4" fillcolor="#B2EBF2" shape=vnode_shape style=filled]
+	N12 [label="Local Government Policy" color="#00BCD4" fillcolor="#B2EBF2" shape=vnode_shape style=filled]
+	N13 [label="Policy Simulation Models" color="#00BCD4" fillcolor="#B2EBF2" shape=hexagon style=filled]
+	N14 [label="Report Drafting" color="#7E57C2" fillcolor="#EDE7F6" shape=preparation style=filled]
+	S0 [label="" color="#7E57C2" fillcolor="#EDE7F6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#7E57C2" fillcolor="#EDE7F6" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M1 [label="" color="#00BCD4" fillcolor="#B2EBF2" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Ethical Considerations {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Ethical Considerations"
+		nest0_0 [label="Criteria Establishment" color="#FFC2C2" fillcolor="#FFEBEB" shape=action style=filled]
+		nest0_1 [label="Program Design" color="#FFC2C2" fillcolor="#FFEBEB" shape=document style=filled]
+	}
+	subgraph cluster_Political Feasibility Assessment {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Political Feasibility Assessment"
+		nest1_0 [label="Implementation Plan Development" color="#7E57C2" fillcolor="#EDE7F6" shape=document style=filled]
+		nest1_1 [label="Policy Brief Writing" color="#00BCD4" fillcolor="#B2EBF2" shape=vnode_shape style=filled]
+		nest1_2 [label="Presentation Skills" color="#7E57C2" fillcolor="#EDE7F6" shape=rectangle style=filled]
+		nest1_3 [label="Option Generation" color="#00BCD4" fillcolor="#B2EBF2" shape=parallelogram style=filled]
+	}
+	N0 -> N1 [color="#00BCD4" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#7E57C2" penwidth=1.5 style=solid dir=forward]
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+	N3 -> N4 [color="#FFC2C2" penwidth=1.5 style=dashed dir=forward]
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+	N5 -> N6 [color="#FFC2C2" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
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+	nest1_0 -> nest1_1 [color="#00BCD4" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> nest1_2 [color="#000000" penwidth=1.5 style=solid dir=forward]
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+	N3 -> S0 [color="#00BCD4" penwidth=1.5 style=solid dir=forward]
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+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_340.txt b/test/diagrams/scanned_hard/diagrams_340.txt
new file mode 100644
index 0000000000000000000000000000000000000000..cf88af292e961057a63bd5cab475e50a9ee609ce
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_340.txt
@@ -0,0 +1,39 @@
+<Anti_Bribery and Corruption Compliance, connectedTo, Corporate Governance Standards>
+<Audit Planning, connectedTo, Regulatory Interpretation>
+<Audit Planning, connectedTo, Supplier Code of Conduct>
+<CSR Reporting, connectedTo, Stakeholder Engagement on Ethics>
+<Code of Conduct Implementation, connectedTo, Audit Planning>
+<Code of Conduct Implementation, connectedTo, Financial Regulations Compliance>
+<Code of Conduct Implementation, connectedTo, Supplier Code of Conduct>
+<Code of Conduct Implementation, connectedTo, Transparent Communication>
+<Compliance Hotlines, reports, Sanctions Compliance>
+<Compliance Software Implementation, connectedTo, CSR Reporting>
+<Compliance Training, connectedTo, Risk Assessment>
+<Compliance Training, connectedTo, Stakeholder Engagement on Ethics>
+<Consumer Protection Compliance, connectedTo, Data Ethics>
+<Corporate Governance Standards, connectedTo, Third_Party Due Diligence>
+<Data Ethics, connectedTo, Code of Conduct Implementation>
+<Data Ethics, connectedTo, Monitoring and Enforcement>
+<Environmental Compliance, detects, Labor Law Compliance>
+<Ethical Leadership Development, connectedTo, Export Control Compliance>
+<Export Control Compliance, connectedTo, Compliance Software Implementation>
+<Financial Regulations Compliance, governs, Compliance Training>
+<Information Security Compliance, connectedTo, Corporate Governance Standards>
+<Information Security Compliance, connectedTo, Ethical Leadership Development>
+<Information Security Compliance, connectedTo, Policy Development>
+<Information Security Compliance, connectedTo, Risk Assessment>
+<Information Security Compliance, connectedTo, Third_Party Due Diligence>
+<Labor Law Compliance, connectedTo, Consumer Protection Compliance>
+<Labor Law Compliance, connectedTo, Monitoring and Enforcement>
+<Labor Law Compliance, connectedTo, Risk Assessment>
+<Legal Advisory, connectedTo, Labor Law Compliance>
+<Monitoring and Enforcement, connectedTo, Audit Planning>
+<Policy Development, monitors, Anti_Bribery and Corruption Compliance>
+<Regulatory Interpretation, connectedTo, Legal Advisory>
+<Risk Assessment, connectedTo, Policy Development>
+<Sanctions Compliance, connectedTo, Information Security Compliance>
+<Stakeholder Engagement on Ethics, codes, Compliance Hotlines>
+<Supplier Code of Conduct, connectedTo, Financial Regulations Compliance>
+<Supplier Code of Conduct, connectedTo, Risk Assessment>
+<Transparent Communication, connectedTo, Monitoring and Enforcement>
+<Transparent Communication, connectedTo, Risk Assessment>
diff --git a/test/diagrams/scanned_hard/diagrams_341.dot b/test/diagrams/scanned_hard/diagrams_341.dot
new file mode 100644
index 0000000000000000000000000000000000000000..00e35387f4cec964dd5da96434c301b75d8ff16f
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_341.dot
@@ -0,0 +1,79 @@
+digraph {
+	rankdir=RL
+	N0 [label="Cold Case Review" color="#BA68C8" fillcolor="#F3E5F5" shape=document style=filled]
+	N1 [label="Trace Evidence Analysis" color="#CFCFCF" fillcolor="#F6F6F6" shape=action style=filled]
+	N2 [label="Fingerprint Analysis" color="#CFCFCF" fillcolor="#F6F6F6" shape=diamond style=filled]
+	N3 [label="Crime Database Search" color="#CFCFCF" fillcolor="#F6F6F6" shape=action style=filled]
+	N4 [label="Mobile Device Forensics" color="#CFCFCF" fillcolor="#F6F6F6" shape=preparation style=filled]
+	N5 [label="Arson Investigation" color="#E57373" fillcolor="#FFEBEE" shape=inputoutput style=filled]
+	N6 [label="Cyber Crime Investigation" color="#BA68C8" fillcolor="#F3E5F5" shape=box style=filled]
+	N7 [label="Crime Scene Investigation" color="#BA68C8" fillcolor="#F3E5F5" shape=rect style=filled]
+	N8 [label="Forensic Anthropology" color="#BA68C8" fillcolor="#F3E5F5" shape=vnode_shape style=filled]
+	N9 [label="Vehicle Forensics" color="#BA68C8" fillcolor="#F3E5F5" shape=document style=filled]
+	N10 [label="Legal Standards Compliance" color="#CFCFCF" fillcolor="#F6F6F6" shape=multipledocuments style=filled]
+	N11 [label="Document Examination" color="#CFCFCF" fillcolor="#F6F6F6" shape=diamond style=filled]
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+		nest0_2 [label="DNA Profiling" color="#BA68C8" fillcolor="#F3E5F5" shape=diamond style=filled]
+	}
+	subgraph cluster_Malware Analysis {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Malware Analysis"
+		nest1_0 [label="Facial Recognition" color="#E57373" fillcolor="#FFEBEE" shape=preparation style=filled]
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+	nest1_0 -> nest1_1 [color="#BA68C8" penwidth=1.5 style=dashed dir=forward]
+	nest1_1 -> nest1_2 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	N9 -> nest1_0 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	nest1_2 -> N5 [color="#CFCFCF" penwidth=1.5 style=dashed dir=forward]
+	N0 -> S0 [color="#CFCFCF" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N10 [color="#BA68C8" penwidth=1.5 style=solid dir=forward]
+	S0 -> N16 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	S0 -> N5 [color="#CFCFCF" penwidth=1.5 style=solid dir=forward]
+	N12 -> S1 [color="#E57373" penwidth=1.5 style=solid dir=forward]
+	S1 -> N14 [color="#BA68C8" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N15 [color="#BA68C8" penwidth=1.5 style=solid dir=forward]
+	S1 -> N16 [color="#CFCFCF" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M0 [color="#CFCFCF" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M0 [color="#CFCFCF" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M0 [color="#E57373" penwidth=1.5 style=dashed dir=forward]
+	M0 -> N6 [color="#BA68C8" penwidth=1.5 style=solid dir=forward]
+	N0 -> M2 [color="#CFCFCF" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M2 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	M2 -> N3 [color="#BA68C8" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_344.txt b/test/diagrams/scanned_hard/diagrams_344.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e7cc343b4da8549c8d83cba177e5fb3fbfac008f
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_344.txt
@@ -0,0 +1,33 @@
+<Crime Prevention Through Education, connectedTo, Domestic Violence Prevention>
+<Crime Prevention Through Education, connectedTo, Gang Intervention>
+<Crime Prevention Through Education, connectedTo, Hotspot Policing>
+<Crime Prevention Through Education, connectedTo, Mediation Services>
+<Crime Prevention Through Education, connectedTo, Public Awareness Campaigns>
+<Domestic Violence Prevention, connectedTo, Gang Intervention>
+<Drug Prevention Initiatives, connectedTo, Cybercrime Prevention>
+<Drug Prevention Initiatives, connectedTo, Domestic Violence Prevention>
+<Drug Prevention Initiatives, predicts, Early Intervention Programs>
+<Early Intervention Programs, connectedTo, Domestic Violence Prevention>
+<Early Intervention Programs, connectedTo, Victim Support Services>
+<Gang Intervention, connectedTo, Cybercrime Prevention>
+<Gang Intervention, connectedTo, Technology for Prevention>
+<Hotspot Policing, connectedTo, Cybercrime Prevention>
+<Hotspot Policing, connectedTo, Mediation Services>
+<Mediation Services, connectedTo, Sexual Assault Prevention>
+<Mediation Services, connectedTo, Youth Programs>
+<Patrol Operations, connectedTo, Crime Prevention Through Education>
+<Police_Community Relations, connectedTo, Mediation Services>
+<Public Awareness Campaigns, connectedTo, Domestic Violence Prevention>
+<Robbery Prevention, connectedTo, Police_Community Relations>
+<Security Lighting, connectedTo, Patrol Operations>
+<Sexual Assault Prevention, connectedTo, Security Lighting>
+<Technology for Prevention, connectedTo, Cybercrime Prevention>
+<Technology for Prevention, connectedTo, Hotspot Policing>
+<Technology for Prevention, connectedTo, Mediation Services>
+<Victim Support Services, connectedTo, Crime Prevention Through Education>
+<Victim Support Services, connectedTo, Cybercrime Prevention>
+<Victim Support Services, connectedTo, Domestic Violence Prevention>
+<Victim Support Services, connectedTo, Mediation Services>
+<Victim Support Services, connectedTo, Robbery Prevention>
+<Victim Support Services, connectedTo, Youth Programs>
+<Youth Programs, connectedTo, Cybercrime Prevention>
diff --git a/test/diagrams/scanned_hard/diagrams_346.txt b/test/diagrams/scanned_hard/diagrams_346.txt
new file mode 100644
index 0000000000000000000000000000000000000000..528aa590294274d4b15c63a3897b3b09035a48b3
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_346.txt
@@ -0,0 +1,31 @@
+<Buoy Deployment, connectedTo, Marine Geology>
+<Climate Change Impact Study, connectedTo, Ocean Data Archiving>
+<Climate Change Impact Study, connectedTo, Sediment Analysis>
+<Coastal Erosion Research, connectedTo, Climate Change Impact Study>
+<Deep_Sea Exploration, connectedTo, Sediment Analysis>
+<Marine Biodiversity Assessment, connectedTo, Ocean Temperature Sensing>
+<Marine Ecosystem Health, connectedTo, Coastal Erosion Research>
+<Marine Geology, connectedTo, Coastal Zone Management>
+<Marine Life Observation, connectedTo, Marine Biodiversity Assessment>
+<Marine Pollution Monitoring, connectedTo, Marine Life Observation>
+<Marine Pollution Monitoring, connectedTo, Marine Remote Sensing>
+<Marine Protected Area Planning, connectedTo, Marine Ecosystem Health>
+<Marine Remote Sensing, connectedTo, Buoy Deployment>
+<Marine Remote Sensing, connectedTo, Coastal Zone Management>
+<Marine Remote Sensing, connectedTo, Polar Oceanography>
+<Marine Remote Sensing, develops_instruments, Marine Geology>
+<Marine Remote Sensing, samples, Sea Level Monitoring>
+<Ocean Current Measurement, connectedTo, Climate Change Impact Study>
+<Ocean Current Measurement, connectedTo, Sediment Analysis>
+<Ocean Data Archiving, connectedTo, Deep_Sea Exploration>
+<Ocean Data Archiving, connectedTo, Sediment Analysis>
+<Ocean Data Archiving, maintains_buoys, Sediment Analysis>
+<Ocean Temperature Sensing, connectedTo, Buoy Deployment>
+<Polar Oceanography, connectedTo, Buoy Deployment>
+<Polar Oceanography, connectedTo, Marine Protected Area Planning>
+<ROV or AUV Operations, connectedTo, Coastal Zone Management>
+<ROV or AUV Operations, connectedTo, Ocean Current Measurement>
+<ROV or AUV Operations, connectedTo, Polar Oceanography>
+<ROV or AUV Operations, connectedTo, Sediment Analysis>
+<Sea Level Monitoring, monitors, Polar Oceanography>
+<Sediment Analysis, measures, Marine Pollution Monitoring>
diff --git a/test/diagrams/scanned_hard/diagrams_349.dot b/test/diagrams/scanned_hard/diagrams_349.dot
new file mode 100644
index 0000000000000000000000000000000000000000..9601d42121b00a0cb99a64c5dd28dc782f553206
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_349.dot
@@ -0,0 +1,73 @@
+digraph {
+	rankdir=RL
+	N0 [label="Real_Time Captioning" color="#6EB76D" fillcolor="#E9F7E8" shape=predefinedprocess style=filled]
+	N1 [label="Natural Language Understanding" color="#FF9800" fillcolor="#FFE0B2" shape=multipledocuments style=filled]
+	N2 [label="Contextual Understanding" color="#FFE470" fillcolor="#FFFAE0" shape=inputoutput style=filled]
+	N3 [label="Speech Data Annotation" color="#FFE470" fillcolor="#FFFAE0" shape=parallelogram style=filled]
+	N4 [label="Cross_Lingual Speech Recognition" color="#FFE470" fillcolor="#FFFAE0" shape=action style=filled]
+	N5 [label="Speech_to_Text Conversion" color="#FFE470" fillcolor="#FFFAE0" shape=vnode_shape style=filled]
+	N6 [label="Keyword Spotting" color="#FF9800" fillcolor="#FFE0B2" shape=box style=filled]
+	N7 [label="Voice Activity Detection" color="#6EB76D" fillcolor="#E9F7E8" shape=document style=filled]
+	N8 [label="Cloud_based Speech Services" color="#FF9800" fillcolor="#FFE0B2" shape=ellipse style=filled]
+	N9 [label="Feature Extraction" color="#FFE470" fillcolor="#FFFAE0" shape=inputoutput style=filled]
+	N10 [label="Robust Speech Recognition" color="#6EB76D" fillcolor="#E9F7E8" shape=vnode_shape style=filled]
+	N11 [label="Emotion Recognition from Voice" color="#6EB76D" fillcolor="#E9F7E8" shape=rect style=filled]
+	N12 [label="Voice Biometrics" color="#FF9800" fillcolor="#FFE0B2" shape=parallelogram style=filled]
+	S0 [label="" color="#FFE470" fillcolor="#FFFAE0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S1 [label="" color="#FF9800" fillcolor="#FFE0B2" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	S2 [label="" color="#6EB76D" fillcolor="#E9F7E8" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M0 [label="" color="#FFE470" fillcolor="#FFFAE0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	M2 [label="" color="#FFE470" fillcolor="#FFFAE0" shape=circle style=filled fixedsize=true height=0.1 width=0.1]
+	subgraph cluster_Security Authentication {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Security Authentication"
+		nest0_0 [label="Speech Emotion Recognition" color="#FFE470" fillcolor="#FFFAE0" shape=hexagon style=filled]
+		nest0_1 [label="Medical Transcription" color="#FF9800" fillcolor="#FFE0B2" shape=predefinedprocess style=filled]
+	}
+	subgraph cluster_Legal Transcription {
+		style="rounded,filled,dashed"
+		color=gray50
+		label="Legal Transcription"
+		nest1_0 [label="Voice Search Optimization" color="#6EB76D" fillcolor="#E9F7E8" shape=diamond style=filled]
+		nest1_1 [label="Disordered Speech Recognition" color="#FFE470" fillcolor="#FFFAE0" shape=multipledocuments style=filled]
+	}
+	N0 -> N1 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#6EB76D" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#6EB76D" penwidth=1.5 style=dashed dir=forward]
+	N4 -> N5 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N9 -> N10 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N10 -> N11 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N11 -> N12 [color="#FFE470" penwidth=1.5 style=dashed dir=forward]
+	nest0_0 -> nest0_1 [color="#6EB76D" penwidth=1.5 style=solid dir=forward]
+	N5 -> nest0_0 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	nest0_1 -> N10 [color="#6EB76D" penwidth=1.5 style=dashed dir=forward]
+	nest1_0 -> nest1_1 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N7 -> nest1_0 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	nest1_1 -> N9 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	N4 -> S0 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N11 [color="#FFE470" penwidth=1.5 style=dashed dir=forward]
+	S0 -> N12 [color="#FFE470" penwidth=1.5 style=solid dir=forward]
+	N3 -> S1 [color="#6EB76D" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N7 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	S1 -> N9 [color="#6EB76D" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N10 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	S1 -> N11 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N6 -> S2 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	S2 -> N12 [color="#FFE470" penwidth=1.5 style=dashed dir=forward]
+	S2 -> N10 [color="#6EB76D" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M0 [color="#6EB76D" penwidth=1.5 style=dashed dir=forward]
+	N3 -> M0 [color="#FFE470" penwidth=1.5 style=dashed dir=forward]
+	N2 -> M0 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	M0 -> N12 [color="#6EB76D" penwidth=1.5 style=dashed dir=forward]
+	N1 -> M2 [color="#FF9800" penwidth=1.5 style=dashed dir=forward]
+	N4 -> M2 [color="#FFE470" penwidth=1.5 style=solid dir=forward]
+	N5 -> M2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N0 -> M2 [color="#FF9800" penwidth=1.5 style=solid dir=forward]
+	M2 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_352.txt b/test/diagrams/scanned_hard/diagrams_352.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ec692692fb0dc0ac435f493589ee7c7ad9dea1c1
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_352.txt
@@ -0,0 +1,33 @@
+<API Automation, connectedTo, Scripting for Automation>
+<Audit Trail for Automation, connectedTo, Scalability of Automation>
+<Automated Data Validation, connectedTo, Chatbot Integration>
+<Automated Data Validation, connectedTo, Low_Code or No_Code Automation>
+<Automated Data Validation, develops_solutions, Task Automation>
+<Automation Opportunity Identification, tracks, Performance Monitoring of Bots>
+<Change Management for Automation, connectedTo, Workflow Analysis>
+<Chatbot Integration, streamlines, IT Operations Automation>
+<Decision Automation, connectedTo, Error Handling in Automation>
+<Document Processing Automation, approvals_manages, Change Management for Automation>
+<Document Processing Automation, connectedTo, Error Handling in Automation>
+<Document Processing Automation, connectedTo, Return on Investment Calculation>
+<Document Processing Automation, connectedTo, Workflow Analysis>
+<IT Operations Automation, accelerates_operations, Low_Code or No_Code Automation>
+<IT Operations Automation, advises, Report Generation Automation>
+<IT Operations Automation, connectedTo, Automation Opportunity Identification>
+<IT Operations Automation, connectedTo, Scalability of Automation>
+<Integration with Existing Systems, connectedTo, API Automation>
+<Integration with Existing Systems, connectedTo, Automation Opportunity Identification>
+<Low_Code or No_Code Automation, connectedTo, Task Automation>
+<Orchestration of Processes, connectedTo, Chatbot Integration>
+<Orchestration of Processes, connectedTo, Process Mapping>
+<Performance Monitoring of Bots, connectedTo, Document Processing Automation>
+<Process Mapping, connectedTo, Automated Data Validation>
+<Process Mapping, connectedTo, Chatbot Integration>
+<Report Generation Automation, connectedTo, Integration with Existing Systems>
+<Report Generation Automation, connectedTo, Task Automation>
+<Return on Investment Calculation, connectedTo, Decision Automation>
+<Scalability of Automation, connectedTo, Low_Code or No_Code Automation>
+<Scalability of Automation, connectedTo, Report Generation Automation>
+<Scripting for Automation, connectedTo, Audit Trail for Automation>
+<Task Automation, connectedTo, Error Handling in Automation>
+<Workflow Analysis, connectedTo, Low_Code or No_Code Automation>
diff --git a/test/diagrams/scanned_hard/diagrams_353.txt b/test/diagrams/scanned_hard/diagrams_353.txt
new file mode 100644
index 0000000000000000000000000000000000000000..03bf9cbd13c7c0fda99a6cb4d3f07c850a59d98f
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_353.txt
@@ -0,0 +1,27 @@
+<Audit Planning, connectedTo, Testing Methods>
+<Automated Optical Inspection, connectedTo, Lean Principles in Quality>
+<Automated Optical Inspection, connectedTo, Pharmaceutical Quality Control>
+<Automated Optical Inspection, connectedTo, Statistical Process Control>
+<Calibration of Instruments, connectedTo, Audit Planning>
+<Defect Detection, connectedTo, Hardware Quality Testing>
+<Hardware Quality Testing, connectedTo, Total Quality Management>
+<Inspection Procedures, connectedTo, Audit Planning>
+<Inspection Procedures, connectedTo, Calibration of Instruments>
+<Inspection Procedures, connectedTo, Sampling Plans>
+<Inspection Procedures, connectedTo, Testing Methods>
+<Lean Principles in Quality, connectedTo, Audit Planning>
+<Lean Principles in Quality, connectedTo, Non_Conformance Management>
+<Lean Principles in Quality, connectedTo, Risk_Based Quality Control>
+<Non_Conformance Management, connectedTo, Inspection Procedures>
+<Non_Destructive Testing, connectedTo, Automated Optical Inspection>
+<Pharmaceutical Quality Control, connectedTo, Supplier Audits>
+<Quality Management Systems, connectedTo, Statistical Process Control>
+<Quality Standards Development, connectedTo, Non_Conformance Management>
+<Risk_Based Quality Control, connectedTo, Quality Standards Development>
+<Sampling Plans, connectedTo, Quality Management Systems>
+<Service Quality Management, connectedTo, Audit Planning>
+<Statistical Process Control, connectedTo, Service Quality Management>
+<Supplier Audits, verifies, Testing Methods>
+<Total Quality Management, connectedTo, Lean Principles in Quality>
+<Total Quality Management, connectedTo, Non_Destructive Testing>
+<Total Quality Management, connectedTo, Risk_Based Quality Control>
diff --git a/test/diagrams/scanned_hard/diagrams_355.txt b/test/diagrams/scanned_hard/diagrams_355.txt
new file mode 100644
index 0000000000000000000000000000000000000000..44800ccc9de3f51e68ec18052ddf71e70b706bbe
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_355.txt
@@ -0,0 +1,24 @@
+<AI for Crop Disease Detection, connectedTo, Digital Agronomy>
+<AI for Crop Disease Detection, connectedTo, Drone Monitoring>
+<Blockchain for Agri_Supply Chain, connectedTo, Connectivity Solutions>
+<Connectivity Solutions, connectedTo, Digital Soil Mapping>
+<Data Security in Agriculture, connectedTo, Market Price Forecasting>
+<Digital Agronomy, collects_data, Geographic Information Systems for Farms>
+<Digital Agronomy, connectedTo, Blockchain for Agri_Supply Chain>
+<Digital Agronomy, connectedTo, Connectivity Solutions>
+<Digital Agronomy, connectedTo, Digital Soil Mapping>
+<Digital Soil Mapping, connectedTo, Geographic Information Systems for Farms>
+<Drone Monitoring, connectedTo, Blockchain for Agri_Supply Chain>
+<Drone Monitoring, connectedTo, Pest and Disease Management Systems>
+<Farm Data Integration, connectedTo, Blockchain for Agri_Supply Chain>
+<Farm Data Integration, connectedTo, Digital Agronomy>
+<Farm Data Integration, connectedTo, Farm Labor Management Software>
+<Farm Data Integration, connectedTo, Livestock Feeding Automation>
+<Farm Labor Management Software, tracks_equipment, Data Security in Agriculture>
+<Geographic Information Systems for Farms, connectedTo, Market Price Forecasting>
+<IoT in Agriculture, connectedTo, Variable Rate Application>
+<Livestock Feeding Automation, connectedTo, IoT in Agriculture>
+<Market Price Forecasting, connectedTo, Connectivity Solutions>
+<Pest and Disease Management Systems, connectedTo, Blockchain for Agri_Supply Chain>
+<Pest and Disease Management Systems, connectedTo, Farm Data Integration>
+<Variable Rate Application, connectedTo, AI for Crop Disease Detection>
diff --git a/test/diagrams/scanned_hard/diagrams_36.dot b/test/diagrams/scanned_hard/diagrams_36.dot
new file mode 100644
index 0000000000000000000000000000000000000000..b0c25615a2714716e4b1f6e548610a9fe84a55db
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_36.dot
@@ -0,0 +1,19 @@
+digraph {
+	rankdir=TB
+	N0 [label="Warehouse Automation" color="#A1D7CD" fillcolor="#EDF5F3" shape=vnode_shape style=filled]
+	N1 [label="Customs Compliance" color="#A1D7CD" fillcolor="#EDF5F3" shape=predefinedprocess style=filled]
+	N2 [label="Warehousing" color="#A1D7CD" fillcolor="#EDF5F3" shape=rectangle style=filled]
+	N3 [label="Circular Economy Practices" color="#A1D7CD" fillcolor="#EDF5F3" shape=hexagon style=filled]
+	N4 [label="Sustainability Initiatives" color="#00BCD4" fillcolor="#B2EBF2" shape=diamond style=filled]
+	N5 [label="Supply Chain Visibility" color="#A2D0FF" fillcolor="#E8F0FF" shape=document style=filled]
+	N6 [label="Production Scheduling Integration" color="#A1D7CD" fillcolor="#EDF5F3" shape=ellipse style=filled]
+	N7 [label="Intermodal Transportation" color="#A2D0FF" fillcolor="#E8F0FF" shape=document style=filled]
+	N0 -> N1 [color="#00BCD4" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#A2D0FF" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#00BCD4" penwidth=1.5 style=dashed label="innovates" dir=forward]
+	N3 -> N4 [color="#A1D7CD" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#A1D7CD" penwidth=1.5 style=dashed label="traceability" dir=forward]
+	N5 -> N6 [color="#00BCD4" penwidth=1.5 style=solid label="regulates" dir=forward]
+	N6 -> N7 [color="#A2D0FF" penwidth=1.5 style=solid label="secures" dir=forward]
+	N3 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_40.dot b/test/diagrams/scanned_hard/diagrams_40.dot
new file mode 100644
index 0000000000000000000000000000000000000000..47fbe344aac59468394f04d5c8f8d2d901e09fa5
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_40.dot
@@ -0,0 +1,26 @@
+digraph {
+	rankdir=RL
+	N0 [label="Renewable Energy Potential Assessment" color="#BDBDBD" fillcolor="#F5F5F5" shape=inputoutput style=filled]
+	N1 [label="Climate Education Programs" color="#E91E63" fillcolor="#FCE4EC" shape=rect style=filled]
+	N2 [label="Flood Risk Assessment" color="#BDBDBD" fillcolor="#F5F5F5" shape=preparation style=filled]
+	N3 [label="Climate Policy Analysis" color="#BDBDBD" fillcolor="#F5F5F5" shape=vnode_shape style=filled]
+	N4 [label="Drought Monitoring and Forecasting" color="#BDBDBD" fillcolor="#F5F5F5" shape=multipledocuments style=filled]
+	N5 [label="Climate Change Vulnerability Assessment" color="#FFA726" fillcolor="#FFF3E0" shape=document style=filled]
+	N6 [label="Carbon Sequestration Technologies" color="#E91E63" fillcolor="#FCE4EC" shape=ellipse style=filled]
+	N7 [label="Greenhouse Gas Measurement" color="#E91E63" fillcolor="#FCE4EC" shape=vnode_shape style=filled]
+	N8 [label="Environmental Justice Study" color="#E91E63" fillcolor="#FCE4EC" shape=ellipse style=filled]
+	N9 [label="Ecological Footprint Calculation" color="#E91E63" fillcolor="#FCE4EC" shape=ellipse style=filled]
+	N10 [label="Data Collection" color="#FFA726" fillcolor="#FFF3E0" shape=database style=filled]
+	N0 -> N1 [color="#000000" penwidth=1.5 style=dashed label="educates" dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#BDBDBD" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#FFA726" penwidth=1.5 style=solid label="communicates" dir=forward]
+	N5 -> N6 [color="#BDBDBD" penwidth=1.5 style=dashed label="measures" dir=forward]
+	N6 -> N7 [color="#BDBDBD" penwidth=1.5 style=dashed label="models" dir=forward]
+	N7 -> N8 [color="#BDBDBD" penwidth=1.5 style=solid label="quantifies" dir=forward]
+	N8 -> N9 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N10 [color="#E91E63" penwidth=1.5 style=solid label="strategies" dir=forward]
+	N10 -> N6 [color="#FFA726" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N8 [color="#E91E63" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_41.txt b/test/diagrams/scanned_hard/diagrams_41.txt
new file mode 100644
index 0000000000000000000000000000000000000000..05e1ed3a7bd05132cfd560d2634b2f9f4ab4c23c
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_41.txt
@@ -0,0 +1,9 @@
+<Arctic Weather Research, measures, Climate Modeling>
+<Atmospheric Data Collection, studies, Arctic Weather Research>
+<Boundary Layer Study, charts, Meteorological Instrument Calibration>
+<Climate Change Impact Study, transmits, Precipitation Measurement>
+<Climate Modeling, connectedTo, Climate Change Impact Study>
+<Hurricane Trajectory Modeling, connectedTo, Seasonal Outlook Preparation>
+<Meteorological Instrument Calibration, connectedTo, Atmospheric Data Collection>
+<Meteorological Instrument Calibration, connectedTo, Hurricane Trajectory Modeling>
+<Precipitation Measurement, interprets, Hurricane Trajectory Modeling>
diff --git a/test/diagrams/scanned_hard/diagrams_47.txt b/test/diagrams/scanned_hard/diagrams_47.txt
new file mode 100644
index 0000000000000000000000000000000000000000..774fbe6ef7de6e14e0ade8bf93dff7a0a14f791d
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_47.txt
@@ -0,0 +1,12 @@
+<After_School Programs, connectedTo, Child Protection Policies>
+<Child Protection Policies, inspects, Potty Training Assistance>
+<Child Psychology Application, connectedTo, Teacher_Child Ratio Management>
+<Daily Activity Reporting, administers, Hygiene Practices>
+<Early Literacy Programs, connectedTo, Child Psychology Application>
+<Hygiene Practices, facilitates, After_School Programs>
+<Infant Care, connectedTo, Daily Activity Reporting>
+<Parent_Teacher Conferences, connectedTo, Playground Safety Inspection>
+<Playground Safety Inspection, connectedTo, Infant Care>
+<Playground Safety Inspection, guides, Early Literacy Programs>
+<Potty Training Assistance, organizes, Music and Movement Activities>
+<Teacher_Child Ratio Management, plans, Infant Care>
diff --git a/test/diagrams/scanned_hard/diagrams_50.txt b/test/diagrams/scanned_hard/diagrams_50.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c0608bf6cccaf5983919c96cc6b845a29c2f4499
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_50.txt
@@ -0,0 +1,11 @@
+<Chaplain Services, connectedTo, Crisis Management>
+<Counter_Terrorism Operations, enforces, Rules of Engagement>
+<Crisis Management, tests, Troop Deployment>
+<Equipment Maintenance, surveys, Targeting>
+<Military Law, connectedTo, Chaplain Services>
+<Readiness Assessment, mediates, Equipment Maintenance>
+<Reconnaissance, evaluates, Naval Operations>
+<Rules of Engagement, innovates, Reconnaissance>
+<Targeting, connectedTo, Counter_Terrorism Operations>
+<Troop Deployment, connectedTo, Naval Operations>
+<Troop Deployment, connectedTo, Readiness Assessment>
diff --git a/test/diagrams/scanned_hard/diagrams_51.txt b/test/diagrams/scanned_hard/diagrams_51.txt
new file mode 100644
index 0000000000000000000000000000000000000000..eb4c8a8237b7d45d845d06c313e034bc2b6d22ed
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_51.txt
@@ -0,0 +1,8 @@
+<Airport Security Management, connectedTo, Regulatory Compliance>
+<Baggage Handling, schedules, Crew Resource Management>
+<Crew Resource Management, checks, Pilot Training>
+<Crew Resource Management, connectedTo, Regulatory Compliance>
+<Navigation System Check, connectedTo, Sustainable Aviation Fuel Development>
+<Pilot Training, connectedTo, Airport Security Management>
+<Regulatory Compliance, de_ices, Security Screening>
+<Sustainable Aviation Fuel Development, plans, Baggage Handling>
diff --git a/test/diagrams/scanned_hard/diagrams_53.dot b/test/diagrams/scanned_hard/diagrams_53.dot
new file mode 100644
index 0000000000000000000000000000000000000000..675aaa97aff6cb2b6dbcff82be96f6f49043ec56
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_53.dot
@@ -0,0 +1,23 @@
+digraph {
+	rankdir=BT
+	N0 [label="Aerospace Part Production" color="#9575CD" fillcolor="#EDE7F6" shape=diamond style=filled]
+	N1 [label="Print Farm Management" color="#673AB7" fillcolor="#D1C4E9" shape=diamond style=filled]
+	N2 [label="Intellectual Property Protection for Designs" color="#673AB7" fillcolor="#D1C4E9" shape=rect style=filled]
+	N3 [label="Consumer Product Creation" color="#F06292" fillcolor="#FCE4EC" shape=action style=filled]
+	N4 [label="Mass Customization" color="#673AB7" fillcolor="#D1C4E9" shape=hexagon style=filled]
+	N5 [label="Maintenance and Repair of Printers" color="#673AB7" fillcolor="#D1C4E9" shape=document style=filled]
+	N6 [label="Printing Process" color="#9575CD" fillcolor="#EDE7F6" shape=database style=filled]
+	N7 [label="Material Research and Development" color="#9575CD" fillcolor="#EDE7F6" shape=preparation style=filled]
+	N8 [label="3D Printed Tooling" color="#673AB7" fillcolor="#D1C4E9" shape=multipledocuments style=filled]
+	N9 [label="Fused Deposition Modeling" color="#9575CD" fillcolor="#EDE7F6" shape=preparation style=filled]
+	N0 -> N1 [color="#F06292" penwidth=1.5 style=dashed label="processes" dir=forward]
+	N1 -> N2 [color="#673AB7" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#F06292" penwidth=1.5 style=dashed label="manufactures" dir=forward]
+	N3 -> N4 [color="#9575CD" penwidth=1.5 style=solid label="maintains" dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#F06292" penwidth=1.5 style=solid dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=solid label="develops" dir=forward]
+	N7 -> N8 [color="#9575CD" penwidth=1.5 style=solid dir=forward]
+	N8 -> N9 [color="#F06292" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N3 [color="#F06292" penwidth=1.5 style=solid dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_53.txt b/test/diagrams/scanned_hard/diagrams_53.txt
new file mode 100644
index 0000000000000000000000000000000000000000..8a480bb1b919d52764a2b1ce776b25e5fdcbd7ac
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_53.txt
@@ -0,0 +1,10 @@
+<3D Printed Tooling, connectedTo, Fused Deposition Modeling>
+<Aerospace Part Production, processes, Print Farm Management>
+<Consumer Product Creation, maintains, Mass Customization>
+<Intellectual Property Protection for Designs, manufactures, Consumer Product Creation>
+<Maintenance and Repair of Printers, connectedTo, Consumer Product Creation>
+<Maintenance and Repair of Printers, connectedTo, Printing Process>
+<Mass Customization, connectedTo, Maintenance and Repair of Printers>
+<Material Research and Development, connectedTo, 3D Printed Tooling>
+<Print Farm Management, connectedTo, Intellectual Property Protection for Designs>
+<Printing Process, develops, Material Research and Development>
diff --git a/test/diagrams/scanned_hard/diagrams_57.dot b/test/diagrams/scanned_hard/diagrams_57.dot
new file mode 100644
index 0000000000000000000000000000000000000000..1831dbf84bbecdf9f6c392776a69796a778bf381
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_57.dot
@@ -0,0 +1,21 @@
+digraph {
+	rankdir=RL
+	N0 [label="Marketing and Promotion" color="#9575CD" fillcolor="#EDE7F6" shape=predefinedprocess style=filled]
+	N1 [label="Game Design" color="#81C784" fillcolor="#F1F8E9" shape=ellipse style=filled]
+	N2 [label="Console Game Development" color="#9575CD" fillcolor="#EDE7F6" shape=multipledocuments style=filled]
+	N3 [label="Player Progression Systems" color="#9575CD" fillcolor="#EDE7F6" shape=hexagon style=filled]
+	N4 [label="Game Engine Customization" color="#81C784" fillcolor="#F1F8E9" shape=parallelogram style=filled]
+	N5 [label="Quality Assurance Testing" color="#9575CD" fillcolor="#EDE7F6" shape=diamond style=filled]
+	N6 [label="In_Game Economy Design" color="#81C784" fillcolor="#F1F8E9" shape=ellipse style=filled]
+	N7 [label="Game Publishing" color="#8C9EFF" fillcolor="#D3D7EB" shape=ellipse style=filled]
+	N8 [label="Localization" color="#9575CD" fillcolor="#EDE7F6" shape=predefinedprocess style=filled]
+	N0 -> N1 [color="#000000" penwidth=1.5 style=dashed label="regulates" dir=forward]
+	N1 -> N2 [color="#81C784" penwidth=1.5 style=dashed label="organizes" dir=forward]
+	N2 -> N3 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#8C9EFF" penwidth=1.5 style=solid label="narrates" dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=dashed label="markets" dir=forward]
+	N5 -> N6 [color="#81C784" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#8C9EFF" penwidth=1.5 style=solid label="innovates" dir=forward]
+	N7 -> N8 [color="#8C9EFF" penwidth=1.5 style=solid dir=forward]
+	N5 -> N2 [color="#9575CD" penwidth=1.5 style=solid label="interacts" dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_57.txt b/test/diagrams/scanned_hard/diagrams_57.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0138f606534dccdb879a399026e73108887d0ef7
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_57.txt
@@ -0,0 +1,9 @@
+<Console Game Development, connectedTo, Player Progression Systems>
+<Game Design, organizes, Console Game Development>
+<Game Engine Customization, markets, Quality Assurance Testing>
+<Game Publishing, connectedTo, Localization>
+<In_Game Economy Design, innovates, Game Publishing>
+<Marketing and Promotion, regulates, Game Design>
+<Player Progression Systems, narrates, Game Engine Customization>
+<Quality Assurance Testing, connectedTo, In_Game Economy Design>
+<Quality Assurance Testing, interacts, Console Game Development>
diff --git a/test/diagrams/scanned_hard/diagrams_58.txt b/test/diagrams/scanned_hard/diagrams_58.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c051f0b9f7bb8bf85f48378e58e3c2033adb4de7
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_58.txt
@@ -0,0 +1,8 @@
+<A&R, markets, Arrangement>
+<Artist Management, critiques, A&R>
+<Music Education, records, Sound Design for Media>
+<Music Festival Organization, publishes, Music Education>
+<Music Production, connectedTo, A&R>
+<Music Production, syncs, Music Festival Organization>
+<Music Video Production, connectedTo, Artist Management>
+<Sound Design for Media, connectedTo, Music Video Production>
diff --git a/test/diagrams/scanned_hard/diagrams_59.dot b/test/diagrams/scanned_hard/diagrams_59.dot
new file mode 100644
index 0000000000000000000000000000000000000000..320bfb21adcbc147cb5545bba44893f1d9cd5a61
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_59.dot
@@ -0,0 +1,20 @@
+digraph {
+	rankdir=TB
+	N0 [label="Visual Effects" color="#FFF176" fillcolor="#FFFDE7" shape=rect style=filled]
+	N1 [label="Insurance Management" color="#FFF176" fillcolor="#FFFDE7" shape=rect style=filled]
+	N2 [label="Green Production Practices" color="#FFCC80" fillcolor="#FFF0CC" shape=diamond style=filled]
+	N3 [label="Art Direction" color="#BDBDBD" fillcolor="#F5F5F5" shape=vnode_shape style=filled]
+	N4 [label="Stunt Coordination" color="#FFCC80" fillcolor="#FFF0CC" shape=parallelogram style=filled]
+	N5 [label="Audience Research" color="#FFF176" fillcolor="#FFFDE7" shape=inputoutput style=filled]
+	N6 [label="Remote Collaboration Tools" color="#FFF176" fillcolor="#FFFDE7" shape=document style=filled]
+	N7 [label="Cinematography" color="#FFF176" fillcolor="#FFFDE7" shape=diamond style=filled]
+	N0 -> N1 [color="#BDBDBD" penwidth=1.5 style=solid label="shoots" dir=forward]
+	N1 -> N2 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#FFCC80" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#FFCC80" penwidth=1.5 style=dashed label="casts" dir=forward]
+	N4 -> N5 [color="#FFF176" penwidth=1.5 style=dashed label="edits" dir=forward]
+	N5 -> N6 [color="#FFF176" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#BDBDBD" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N5 [color="#FFCC80" penwidth=1.5 style=solid dir=forward]
+	N0 -> N2 [color="#BDBDBD" penwidth=1.5 style=dashed label="distributes" dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_65.dot b/test/diagrams/scanned_hard/diagrams_65.dot
new file mode 100644
index 0000000000000000000000000000000000000000..c23bcf15893e45f81676f8a1a0495128bb677018
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_65.dot
@@ -0,0 +1,23 @@
+digraph {
+	rankdir=LR
+	N0 [label="Transaction Verification" color="#A1887F" fillcolor="#EFEBE9" shape=action style=filled]
+	N1 [label="Decentralized Network Design" color="#FFDA4E" fillcolor="#FFE88D" shape=parallelogram style=filled]
+	N2 [label="Private Blockchain Implementation" color="#A1887F" fillcolor="#EFEBE9" shape=parallelogram style=filled]
+	N3 [label="Mining Operations" color="#26A69A" fillcolor="#E0F2F1" shape=ellipse style=filled]
+	N4 [label="Identity Verification on Blockchain" color="#A1887F" fillcolor="#EFEBE9" shape=action style=filled]
+	N5 [label="Real Estate Tokenization" color="#A1887F" fillcolor="#EFEBE9" shape=inputoutput style=filled]
+	N6 [label="Tokenomics Design" color="#FFDA4E" fillcolor="#FFE88D" shape=ellipse style=filled]
+	N7 [label="Governance Models for Blockchains" color="#26A69A" fillcolor="#E0F2F1" shape=ellipse style=filled]
+	N8 [label="Gaming on Blockchain" color="#FFDA4E" fillcolor="#FFE88D" shape=rectangle style=filled]
+	N9 [label="Scalability Solutions" color="#A1887F" fillcolor="#EFEBE9" shape=inputoutput style=filled]
+	N0 -> N1 [color="#26A69A" penwidth=1.5 style=dashed label="performs KYCs" dir=forward]
+	N1 -> N2 [color="#A1887F" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#26A69A" penwidth=1.5 style=solid label="mines blocks" dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=dashed label="implements sharding" dir=forward]
+	N4 -> N5 [color="#A1887F" penwidth=1.5 style=dashed label="deploys solutions" dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=dashed label="powers games" dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#FFDA4E" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#A1887F" penwidth=1.5 style=dashed label="distributes ledgers" dir=forward]
+	N8 -> N7 [color="#26A69A" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_68.dot b/test/diagrams/scanned_hard/diagrams_68.dot
new file mode 100644
index 0000000000000000000000000000000000000000..9dea84c4fa67da5184b0ff517f8c7e89a423c8c8
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_68.dot
@@ -0,0 +1,21 @@
+digraph {
+	rankdir=RL
+	N0 [label="Predictive Maintenance" color="#00BCD4" fillcolor="#E0F7FA" shape=predefinedprocess style=filled]
+	N1 [label="Real_time Data Streaming" color="#388E3C" fillcolor="#C8E6C9" shape=multipledocuments style=filled]
+	N2 [label="Compliance with IoT Regulations" color="#00BCD4" fillcolor="#E0F7FA" shape=diamond style=filled]
+	N3 [label="Smart Manufacturing" color="#9575CD" fillcolor="#EDE7F6" shape=preparation style=filled]
+	N4 [label="IoT Device Certification" color="#388E3C" fillcolor="#C8E6C9" shape=ellipse style=filled]
+	N5 [label="Power Management for Devices" color="#00BCD4" fillcolor="#E0F7FA" shape=action style=filled]
+	N6 [label="Data Analysis in Cloud" color="#9575CD" fillcolor="#EDE7F6" shape=action style=filled]
+	N7 [label="Network Protocol Selection" color="#388E3C" fillcolor="#C8E6C9" shape=rect style=filled]
+	N8 [label="Asset Tracking" color="#9575CD" fillcolor="#EDE7F6" shape=predefinedprocess style=filled]
+	N0 -> N1 [color="#388E3C" penwidth=1.5 style=solid label="uses blockchain" dir=forward]
+	N1 -> N2 [color="#9575CD" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N3 -> N4 [color="#9575CD" penwidth=1.5 style=dashed label="prototypes devices" dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#388E3C" penwidth=1.5 style=dashed label="develops solutions" dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#000000" penwidth=1.5 style=dashed label="integrates sensors" dir=forward]
+	N2 -> N5 [color="#388E3C" penwidth=1.5 style=solid label="analyzes insights" dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_69.txt b/test/diagrams/scanned_hard/diagrams_69.txt
new file mode 100644
index 0000000000000000000000000000000000000000..44dbb046cc3255b387cab838d6541e56e5b42e3b
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_69.txt
@@ -0,0 +1,10 @@
+<Connectivity to Cloud, connectedTo, Containerization at Edge>
+<Containerization at Edge, connectedTo, Fleet Management for Edge Devices>
+<Data Synchronization between Edge and Cloud, manages devices, Connectivity to Cloud>
+<Edge Data Processing, analyzes data at edge, Latency Reduction>
+<Edge Device Deployment, reduces latency, Edge Data Processing>
+<Fleet Management for Edge Devices, connectedTo, Real_time Analytics at Edge>
+<Latency Reduction, processes data locally, Connectivity to Cloud>
+<Local AI or ML Inference, builds smart cities, Telecom Edge Computing>
+<Real_time Analytics at Edge, processes events, Data Synchronization between Edge and Cloud>
+<Telecom Edge Computing, manages distributed systems, Edge Device Deployment>
diff --git a/test/diagrams/scanned_hard/diagrams_71.dot b/test/diagrams/scanned_hard/diagrams_71.dot
new file mode 100644
index 0000000000000000000000000000000000000000..d7d6f4a94611206ef67a1b377b37a8b44c07cd0d
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_71.dot
@@ -0,0 +1,22 @@
+digraph {
+	rankdir=RL
+	N0 [label="Environmental Monitoring" color="#FFE69C" fillcolor="#FFF9D4" shape=document style=filled]
+	N1 [label="Capacity Planning" color="#F06292" fillcolor="#FCE4EC" shape=multipledocuments style=filled]
+	N2 [label="Server Deployment" color="#BDAFA8" fillcolor="#E4E0DF" shape=vnode_shape style=filled]
+	N3 [label="Disaster Recovery Planning" color="#FFE69C" fillcolor="#FFF9D4" shape=document style=filled]
+	N4 [label="Web Server Configuration" color="#BDAFA8" fillcolor="#E4E0DF" shape=parallelogram style=filled]
+	N5 [label="DNS Management" color="#F06292" fillcolor="#FCE4EC" shape=ellipse style=filled]
+	N6 [label="Group Policy Management" color="#FFE69C" fillcolor="#FFF9D4" shape=rect style=filled]
+	N7 [label="Network Performance Tuning" color="#F06292" fillcolor="#FCE4EC" shape=rectangle style=filled]
+	N8 [label="Virtual Desktop Infrastructure" color="#F06292" fillcolor="#FCE4EC" shape=box style=filled]
+	N0 -> N1 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#BDAFA8" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#F06292" penwidth=1.5 style=solid label="installs software" dir=forward]
+	N6 -> N7 [color="#BDAFA8" penwidth=1.5 style=solid label="deploys antiviruses" dir=forward]
+	N7 -> N8 [color="#F06292" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N7 [color="#000000" penwidth=1.5 style=solid label="manages access controls" dir=forward]
+	N1 -> N3 [color="#F06292" penwidth=1.5 style=solid label="troubleshoots issues" dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_74.dot b/test/diagrams/scanned_hard/diagrams_74.dot
new file mode 100644
index 0000000000000000000000000000000000000000..93c276c4d87a0c77c2faabc437d5d4a308a7c83a
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_74.dot
@@ -0,0 +1,19 @@
+digraph {
+	rankdir=LR
+	N0 [label="Low_Power Design" color="#3F51B5" fillcolor="#C5CAE9" shape=rect style=filled]
+	N1 [label="Schematic Capture" color="#00BCD4" fillcolor="#B2EBF2" shape=diamond style=filled]
+	N2 [label="FPGA Design" color="#FFC085" fillcolor="#FFDAB9" shape=action style=filled]
+	N3 [label="Manufacturing Process Planning" color="#3F51B5" fillcolor="#C5CAE9" shape=vnode_shape style=filled]
+	N4 [label="Test Fixture Design" color="#3F51B5" fillcolor="#C5CAE9" shape=action style=filled]
+	N5 [label="Reliability Testing" color="#FFC085" fillcolor="#FFDAB9" shape=hexagon style=filled]
+	N6 [label="Regulatory Compliance" color="#00BCD4" fillcolor="#B2EBF2" shape=diamond style=filled]
+	N7 [label="Enclosure Design" color="#00BCD4" fillcolor="#B2EBF2" shape=inputoutput style=filled]
+	N0 -> N1 [color="#00BCD4" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#3F51B5" penwidth=1.5 style=dashed label="builds prototypes" dir=forward]
+	N2 -> N3 [color="#FFC085" penwidth=1.5 style=solid label="creates documentation" dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=solid label="designs circuits" dir=forward]
+	N4 -> N5 [color="#3F51B5" penwidth=1.5 style=solid label="manages cables" dir=forward]
+	N5 -> N6 [color="#FFC085" penwidth=1.5 style=solid label="designs enclosures" dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N4 -> N2 [color="#3F51B5" penwidth=1.5 style=dashed dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_77.txt b/test/diagrams/scanned_hard/diagrams_77.txt
new file mode 100644
index 0000000000000000000000000000000000000000..9c9cd3b5f9b36beeaea869e9ffc75523901a1e9d
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_77.txt
@@ -0,0 +1,13 @@
+<Click_Through Rate Optimization, connectedTo, Technical SEO>
+<Core Web Vitals Optimization, uses semantics, On_Page SEO>
+<Google Analytics Integration, optimizes on_page, Knowledge Graph Integration>
+<Image Search, uses schema markup, Click_Through Rate Optimization>
+<Knowledge Graph Integration, connectedTo, Search Engine Optimization>
+<On_Page SEO, indexes images, Search Result Display>
+<Ranking Algorithms, manages GMB, Image Search>
+<Schema Markup Implementation, connectedTo, Core Web Vitals Optimization>
+<Schema Markup Implementation, uses search console, Google Analytics Integration>
+<Search Result Display, ranks results, Site Architecture Optimization>
+<Site Architecture Optimization, connectedTo, Core Web Vitals Optimization>
+<Site Architecture Optimization, connectedTo, Google Analytics Integration>
+<Technical SEO, indexes academic papers, Schema Markup Implementation>
diff --git a/test/diagrams/scanned_hard/diagrams_83.dot b/test/diagrams/scanned_hard/diagrams_83.dot
new file mode 100644
index 0000000000000000000000000000000000000000..0e7d00a9585dc3d67ec501849906b54b371358fe
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_83.dot
@@ -0,0 +1,28 @@
+digraph {
+	rankdir=BT
+	N0 [label="Recreational Therapy" color="#CB9BE1" fillcolor="#F2E6F5" shape=action style=filled]
+	N1 [label="Child & Adolescent Therapy" color="#26A69A" fillcolor="#E0F2F1" shape=multipledocuments style=filled]
+	N2 [label="Mindfulness Practice" color="#26A69A" fillcolor="#E0F2F1" shape=action style=filled]
+	N3 [label="Substance Abuse Counseling" color="#CDDC39" fillcolor="#E6EE9C" shape=rect style=filled]
+	N4 [label="Group Therapy" color="#26A69A" fillcolor="#E0F2F1" shape=parallelogram style=filled]
+	N5 [label="Family Therapy" color="#26A69A" fillcolor="#E0F2F1" shape=parallelogram style=filled]
+	N6 [label="Medication Management" color="#CB9BE1" fillcolor="#F2E6F5" shape=inputoutput style=filled]
+	N7 [label="Telehealth Counseling" color="#CB9BE1" fillcolor="#F2E6F5" shape=document style=filled]
+	N8 [label="Diagnosis and Assessment" color="#CDDC39" fillcolor="#E6EE9C" shape=database style=filled]
+	N9 [label="Suicide Prevention" color="#CDDC39" fillcolor="#E6EE9C" shape=preparation style=filled]
+	N10 [label="Art Therapy" color="#CB9BE1" fillcolor="#F2E6F5" shape=document style=filled]
+	N11 [label="Counseling Services" color="#CB9BE1" fillcolor="#F2E6F5" shape=parallelogram style=filled]
+	N0 -> N1 [color="#CDDC39" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#CB9BE1" penwidth=1.5 style=solid label="licenses" dir=forward]
+	N2 -> N3 [color="#CB9BE1" penwidth=1.5 style=solid dir=forward]
+	N3 -> N4 [color="#CB9BE1" penwidth=1.5 style=solid label="guides" dir=forward]
+	N4 -> N5 [color="#26A69A" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#26A69A" penwidth=1.5 style=solid label="prevents" dir=forward]
+	N6 -> N7 [color="#CB9BE1" penwidth=1.5 style=dashed dir=forward]
+	N7 -> N8 [color="#26A69A" penwidth=1.5 style=dashed dir=forward]
+	N8 -> N9 [color="#26A69A" penwidth=1.5 style=solid label="improves" dir=forward]
+	N9 -> N10 [color="#26A69A" penwidth=1.5 style=solid label="trains" dir=forward]
+	N10 -> N11 [color="#26A69A" penwidth=1.5 style=solid label="counsels" dir=forward]
+	N11 -> N10 [color="#000000" penwidth=1.5 style=solid label="diagnoses" dir=forward]
+	N5 -> N4 [color="#CB9BE1" penwidth=1.5 style=solid label="provides" dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_84.dot b/test/diagrams/scanned_hard/diagrams_84.dot
new file mode 100644
index 0000000000000000000000000000000000000000..09a57ff6113ff71e18fa46446accc55b6771b284
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_84.dot
@@ -0,0 +1,20 @@
+digraph {
+	rankdir=TB
+	N0 [label="Supplement Recommendation" color="#4285F4" fillcolor="#D0E0F8" shape=action style=filled]
+	N1 [label="Eating Habit Modification" color="#4285F4" fillcolor="#D0E0F8" shape=multipledocuments style=filled]
+	N2 [label="Grocery Shopping Guidance" color="#4285F4" fillcolor="#D0E0F8" shape=database style=filled]
+	N3 [label="Micronutrient Analysis" color="#26A69A" fillcolor="#E0F2F1" shape=action style=filled]
+	N4 [label="Inflammation and Diet" color="#80DDEA" fillcolor="#D3F7F9" shape=hexagon style=filled]
+	N5 [label="Food Fortification Strategies" color="#80DDEA" fillcolor="#D3F7F9" shape=ellipse style=filled]
+	N6 [label="Nutrigenomics Research" color="#26A69A" fillcolor="#E0F2F1" shape=action style=filled]
+	N7 [label="Restaurant Menu Analysis" color="#26A69A" fillcolor="#E0F2F1" shape=preparation style=filled]
+	N0 -> N1 [color="#26A69A" penwidth=1.5 style=dashed dir=forward]
+	N1 -> N2 [color="#4285F4" penwidth=1.5 style=dashed dir=forward]
+	N2 -> N3 [color="#4285F4" penwidth=1.5 style=dashed label="identifies" dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=dashed label="measures" dir=forward]
+	N4 -> N5 [color="#4285F4" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#4285F4" penwidth=1.5 style=solid label="calculates" dir=forward]
+	N6 -> N7 [color="#80DDEA" penwidth=1.5 style=solid label="counsels" dir=forward]
+	N3 -> N5 [color="#4285F4" penwidth=1.5 style=solid dir=forward]
+	N4 -> N6 [color="#000000" penwidth=1.5 style=solid label="cooks" dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_85.dot b/test/diagrams/scanned_hard/diagrams_85.dot
new file mode 100644
index 0000000000000000000000000000000000000000..ef7de2e346c347af63879d951d62b92addf7b3cf
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_85.dot
@@ -0,0 +1,22 @@
+digraph {
+	rankdir=LR
+	N0 [label="Strength Training" color="#80DDEA" fillcolor="#D3F7F9" shape=rectangle style=filled]
+	N1 [label="Youth Fitness Programs" color="#66BB6A" fillcolor="#E8F5E9" shape=rect style=filled]
+	N2 [label="Group Fitness Classes" color="#66BB6A" fillcolor="#E8F5E9" shape=preparation style=filled]
+	N3 [label="Functional Fitness Training" color="#66BB6A" fillcolor="#E8F5E9" shape=inputoutput style=filled]
+	N4 [label="Online Fitness Coaching" color="#00BCD4" fillcolor="#B2EBF2" shape=action style=filled]
+	N5 [label="Body Composition Analysis" color="#80DDEA" fillcolor="#D3F7F9" shape=ellipse style=filled]
+	N6 [label="Sports_Specific Training" color="#00BCD4" fillcolor="#B2EBF2" shape=predefinedprocess style=filled]
+	N7 [label="Biometric Feedback Integration" color="#66BB6A" fillcolor="#E8F5E9" shape=inputoutput style=filled]
+	N8 [label="Workout Planning" color="#00BCD4" fillcolor="#B2EBF2" shape=rectangle style=filled]
+	N0 -> N1 [color="#66BB6A" penwidth=1.5 style=dashed label="rehabilitates" dir=forward]
+	N1 -> N2 [color="#80DDEA" penwidth=1.5 style=solid dir=forward]
+	N2 -> N3 [color="#80DDEA" penwidth=1.5 style=solid label="communicates" dir=forward]
+	N3 -> N4 [color="#80DDEA" penwidth=1.5 style=solid label="manufactures" dir=forward]
+	N4 -> N5 [color="#66BB6A" penwidth=1.5 style=dashed dir=forward]
+	N5 -> N6 [color="#80DDEA" penwidth=1.5 style=dashed dir=forward]
+	N6 -> N7 [color="#66BB6A" penwidth=1.5 style=solid label="coaches" dir=forward]
+	N7 -> N8 [color="#00BCD4" penwidth=1.5 style=solid dir=forward]
+	N1 -> N3 [color="#66BB6A" penwidth=1.5 style=solid dir=forward]
+	N0 -> N6 [color="#000000" penwidth=1.5 style=dashed label="licenses" dir=forward]
+}
\ No newline at end of file
diff --git a/test/diagrams/scanned_hard/diagrams_85.txt b/test/diagrams/scanned_hard/diagrams_85.txt
new file mode 100644
index 0000000000000000000000000000000000000000..3bb4f6c4c53871bd37f8981c5a4c97b133cf9cce
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_85.txt
@@ -0,0 +1,10 @@
+<Biometric Feedback Integration, connectedTo, Workout Planning>
+<Body Composition Analysis, connectedTo, Sports_Specific Training>
+<Functional Fitness Training, manufactures, Online Fitness Coaching>
+<Group Fitness Classes, communicates, Functional Fitness Training>
+<Online Fitness Coaching, connectedTo, Body Composition Analysis>
+<Sports_Specific Training, coaches, Biometric Feedback Integration>
+<Strength Training, licenses, Sports_Specific Training>
+<Strength Training, rehabilitates, Youth Fitness Programs>
+<Youth Fitness Programs, connectedTo, Functional Fitness Training>
+<Youth Fitness Programs, connectedTo, Group Fitness Classes>
diff --git a/test/diagrams/scanned_hard/diagrams_91.txt b/test/diagrams/scanned_hard/diagrams_91.txt
new file mode 100644
index 0000000000000000000000000000000000000000..f9269d60b8f456f6938ca51ec748dec45f4b2c8f
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_91.txt
@@ -0,0 +1,13 @@
+<Accessibility for Users, cleans, User Onboarding>
+<Driver Management, parks, Fleet Management>
+<First_Mile or Last_Mile Solutions, connectedTo, Vehicle Rebalancing>
+<First_Mile or Last_Mile Solutions, forecasts, User Rating and Feedback Systems>
+<Fleet Management, connectedTo, Vehicle Booking>
+<Platform Development, complies, User Rating and Feedback Systems>
+<Subscription Model Management, regulates, Driver Management>
+<User Onboarding, connectedTo, Subscription Model Management>
+<User Rating and Feedback Systems, connectedTo, Customer Support>
+<User Registration, connectedTo, First_Mile or Last_Mile Solutions>
+<Vehicle Booking, markets, Fleet Management>
+<Vehicle Booking, rates, User Registration>
+<Vehicle Rebalancing, connectedTo, Platform Development>
diff --git a/test/diagrams/scanned_hard/diagrams_97.dot b/test/diagrams/scanned_hard/diagrams_97.dot
new file mode 100644
index 0000000000000000000000000000000000000000..d121cf3cf4b530a1bd96b35f3cde467906e67d74
--- /dev/null
+++ b/test/diagrams/scanned_hard/diagrams_97.dot
@@ -0,0 +1,26 @@
+digraph {
+	rankdir=LR
+	N0 [label="Library Management Systems" color="#FFE69C" fillcolor="#FFF9D4" shape=parallelogram style=filled]
+	N1 [label="Reporting and Analytics" color="#BCB88A" fillcolor="#F5F5DC" shape=predefinedprocess style=filled]
+	N2 [label="Self_Checkout Kiosks" color="#BCB88A" fillcolor="#F5F5DC" shape=parallelogram style=filled]
+	N3 [label="Search Functionality" color="#BCB88A" fillcolor="#F5F5DC" shape=multipledocuments style=filled]
+	N4 [label="Cataloging and Classification" color="#795548" fillcolor="#D7CCC8" shape=ellipse style=filled]
+	N5 [label="Personalized Recommendations" color="#FFE69C" fillcolor="#FFF9D4" shape=predefinedprocess style=filled]
+	N6 [label="Interlibrary Loan" color="#BCB88A" fillcolor="#F5F5DC" shape=rectangle style=filled]
+	N7 [label="User Training on Systems" color="#FFE69C" fillcolor="#FFF9D4" shape=vnode_shape style=filled]
+	N8 [label="System Upgrades" color="#FFE69C" fillcolor="#FFF9D4" shape=inputoutput style=filled]
+	N9 [label="Serials Control" color="#FFE69C" fillcolor="#FFF9D4" shape=rectangle style=filled]
+	N10 [label="User Account Management" color="#BCB88A" fillcolor="#F5F5DC" shape=inputoutput style=filled]
+	N0 -> N1 [color="#FFE69C" penwidth=1.5 style=solid label="communicates" dir=forward]
+	N1 -> N2 [color="#000000" penwidth=1.5 style=dashed label="borrows" dir=forward]
+	N2 -> N3 [color="#BCB88A" penwidth=1.5 style=dashed label="processes" dir=forward]
+	N3 -> N4 [color="#000000" penwidth=1.5 style=dashed label="trains" dir=forward]
+	N4 -> N5 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N5 -> N6 [color="#000000" penwidth=1.5 style=dashed label="digitizes" dir=forward]
+	N6 -> N7 [color="#000000" penwidth=1.5 style=solid dir=forward]
+	N7 -> N8 [color="#795548" penwidth=1.5 style=dashed label="secures" dir=forward]
+	N8 -> N9 [color="#795548" penwidth=1.5 style=solid label="maintains" dir=forward]
+	N9 -> N10 [color="#FFE69C" penwidth=1.5 style=solid dir=forward]
+	N7 -> N10 [color="#BCB88A" penwidth=1.5 style=dashed dir=forward]
+	N9 -> N5 [color="#BCB88A" penwidth=1.5 style=solid label="retrieves" dir=forward]
+}
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_1.mmd b/test/mermaid/hard/mermaid_1.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..25e8eb8994b7b3de3bb0a82dd1d57cb0c56f70a2
--- /dev/null
+++ b/test/mermaid/hard/mermaid_1.mmd
@@ -0,0 +1,124 @@
+graph RL
+    N0([Account Closure])
+    N1[Portfolio Management]
+    N2[AML Screening]
+    N3[[Wealth Management]]
+    N4([Compliance Review])
+    N5[[Investment Planning]]
+    N6([Securities Trading])
+    N7[/Merger and Acquisition/]
+    N8[/Customer Onboarding/]
+    N9[(Loan Processing)]
+    N10(Fraud Check)
+    N11[/Credit Scoring/]
+    N12[Forex Trading]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Approval Decision
+        nest0_0[[KYC Validation]]
+        nest0_1(Underwriting)
+        nest0_2(Mortgage Application)
+        nest0_3{Asset Management}
+    end
+    subgraph Income Verification
+        nest1_0(Interest Calculation)
+        nest1_1[Fund Disbursement]
+        nest1_2{Budgeting Analysis}
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N8 -.-> nest0_0
+    nest0_3 --> N3
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N1 -.-> nest1_0
+    nest1_2 -.-> N11
+    N5 --> S0
+    S0 -.-> N11
+    S0 --> N9
+    S0 -.-> N12
+    N0 --> S1
+    S1 --> N10
+    S1 -.-> N5
+    S1 -.-> N8
+    N0 -.-> M0
+    N3 --> M0
+    M0 -.-> N8
+    N2 --> M1
+    N0 --> M1
+    M1 -.-> N4
+    style N0 fill:#F8FDD3,stroke:#D3EB9F
+    style N1 fill:#F8FDD3,stroke:#D3EB9F
+    style N2 fill:#ECCFF5,stroke:#CD8FF2
+    style N3 fill:#F8FDD3,stroke:#D3EB9F
+    style N4 fill:#FFFCE6,stroke:#FFF9AE
+    style N5 fill:#F8FDD3,stroke:#D3EB9F
+    style N6 fill:#F8FDD3,stroke:#D3EB9F
+    style N7 fill:#FFFCE6,stroke:#FFF9AE
+    style N8 fill:#FFFCE6,stroke:#FFF9AE
+    style N9 fill:#ECCFF5,stroke:#CD8FF2
+    style N10 fill:#ECCFF5,stroke:#CD8FF2
+    style N11 fill:#F8FDD3,stroke:#D3EB9F
+    style N12 fill:#FFFCE6,stroke:#FFF9AE
+    style S0 fill:#F8FDD3,stroke:#D3EB9F
+    style S1 fill:#FFFCE6,stroke:#FFF9AE
+    style M0 fill:#F8FDD3,stroke:#D3EB9F
+    style M1 fill:#ECCFF5,stroke:#CD8FF2
+    style nest0_0 fill:#FFFCE6,stroke:#FFF9AE
+    style nest0_1 fill:#F8FDD3,stroke:#D3EB9F
+    style nest0_2 fill:#ECCFF5,stroke:#CD8FF2
+    style nest0_3 fill:#FFFCE6,stroke:#FFF9AE
+    style nest1_0 fill:#ECCFF5,stroke:#CD8FF2
+    style nest1_1 fill:#F8FDD3,stroke:#D3EB9F
+    style nest1_2 fill:#F8FDD3,stroke:#D3EB9F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#D3EB9F,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_10.mmd b/test/mermaid/hard/mermaid_10.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..b877503ce0411d81208054036485a6c2867c4321
--- /dev/null
+++ b/test/mermaid/hard/mermaid_10.mmd
@@ -0,0 +1,128 @@
+graph RL
+    N0([start])
+    N1{Parent_Teacher Conference}
+    N2[/School Accreditation/]
+    N3[Course Selection]
+    N4[(Faculty Recruitment)]
+    N5[(Special Education Support)]
+    N6[[Thesis Submission]]
+    N7([Internship Coordination])
+    N8[Peer Tutoring]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Scholarship Evaluation
+        nest0_0[Timetable Scheduling]
+        nest0_1[Student Enrollment]
+        nest0_2[Transcript Issuance]
+        nest0_3[/Orientation/]
+    end
+    subgraph Result Declaration
+        nest1_0[(Alumni Network Management)]
+        nest1_1(Attendance Tracking)
+        nest1_2[Field Trip Coordination]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> |evaluates| N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N3 --> nest0_0
+    nest0_3 --> N4
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N6 --> nest1_0
+    nest1_2 -.-> N2
+    N3 -.-> S0
+    S0 -.-> N6
+    S0 -.-> N8
+    S0 -.-> |teaches| N5
+    N3 -.-> S1
+    S1 --> N5
+    S1 --> N6
+    N4 --> S2
+    S2 -.-> |learns| N8
+    S2 -.-> N7
+    S2 --> N6
+    N1 -.-> M0
+    N4 --> M0
+    N3 --> M0
+    M0 --> N6
+    N3 -.-> M1
+    N2 --> M1
+    M1 --> N5
+    N2 --> M2
+    N0 -.-> M2
+    N1 --> M2
+    M2 -.-> N4
+    style N0 fill:#FFF6D9,stroke:#FFCC7A
+    style N1 fill:#FFF6D9,stroke:#FFCC7A
+    style N2 fill:#FFF6D9,stroke:#FFCC7A
+    style N3 fill:#FFF6D9,stroke:#FFCC7A
+    style N4 fill:#FFEBEE,stroke:#E57373
+    style N5 fill:#FFEBEE,stroke:#E57373
+    style N6 fill:#FFEBEE,stroke:#E57373
+    style N7 fill:#F3E5F5,stroke:#AB47BC
+    style N8 fill:#FFEBEE,stroke:#E57373
+    style S0 fill:#FFF6D9,stroke:#FFCC7A
+    style S1 fill:#FFEBEE,stroke:#E57373
+    style S2 fill:#FFF6D9,stroke:#FFCC7A
+    style M0 fill:#F3E5F5,stroke:#AB47BC
+    style M1 fill:#FFF6D9,stroke:#FFCC7A
+    style M2 fill:#FFEBEE,stroke:#E57373
+    style nest0_0 fill:#FFF6D9,stroke:#FFCC7A
+    style nest0_1 fill:#FFF6D9,stroke:#FFCC7A
+    style nest0_2 fill:#FFEBEE,stroke:#E57373
+    style nest0_3 fill:#FFF6D9,stroke:#FFCC7A
+    style nest1_0 fill:#F3E5F5,stroke:#AB47BC
+    style nest1_1 fill:#FFF6D9,stroke:#FFCC7A
+    style nest1_2 fill:#FFF6D9,stroke:#FFCC7A
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#FFCC7A,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_100.mmd b/test/mermaid/hard/mermaid_100.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..422285c3691e78547a63e348607148f7347e7080
--- /dev/null
+++ b/test/mermaid/hard/mermaid_100.mmd
@@ -0,0 +1,87 @@
+graph RL
+    N0([start])
+    N1(Recruitment Process Outsourcing Management)
+    N2[[Background Check]]
+    N3(Social Recruiting)
+    N4[/Recruitment Marketing/]
+    N5[Campus Recruitment]
+    N6{Interview Panel Coordination}
+    N7[Competency_Based Interviewing]
+    N8(Job Description Creation)
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Passive Candidate Engagement
+        nest0_0(Freelancer Engagement)
+        nest0_1{Offer Extension}
+        nest0_2(Video Interviewing)
+        nest0_3(Headhunting)
+    end
+    subgraph Negotiation
+        nest1_0{Candidate Assessment Design}
+        nest1_1[Candidate Relationship Management]
+        nest1_2([Candidate Experience Management])
+        nest1_3[[Global Recruitment Strategy]]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N2 -.-> nest0_0
+    nest0_3 -.-> N8
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 -.-> nest1_3
+    N3 --> nest1_0
+    nest1_3 --> N2
+    N1 --> S1
+    S1 -.-> N4
+    S1 --> N3
+    N0 -.-> S2
+    S2 -.-> N3
+    S2 -.-> N8
+    S2 --> N7
+    N0 --> M1
+    N2 --> M1
+    N1 --> M1
+    M1 --> N4
+    style S1 fill:#FFECB3,stroke:#FFC107
+    style S2 fill:#FCE4EC,stroke:#E91E63
+    style M1 fill:#FFECB3,stroke:#FFC107
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFC107,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_100.txt b/test/mermaid/hard/mermaid_100.txt
new file mode 100644
index 0000000000000000000000000000000000000000..f029996bafb41ee9e33c5ea9cfd1cd85eb197cdd
--- /dev/null
+++ b/test/mermaid/hard/mermaid_100.txt
@@ -0,0 +1,33 @@
+<Background Check, connectedTo, Freelancer Engagement>
+<Background Check, connectedTo, Recruitment Marketing>
+<Background Check, connectedTo, Social Recruiting>
+<Campus Recruitment, connectedTo, Interview Panel Coordination>
+<Candidate Assessment Design, connectedTo, Candidate Relationship Management>
+<Candidate Assessment Design, partOf, Negotiation>
+<Candidate Experience Management, connectedTo, Global Recruitment Strategy>
+<Candidate Experience Management, partOf, Negotiation>
+<Candidate Relationship Management, connectedTo, Candidate Experience Management>
+<Candidate Relationship Management, partOf, Negotiation>
+<Competency_Based Interviewing, connectedTo, Job Description Creation>
+<Freelancer Engagement, connectedTo, Offer Extension>
+<Freelancer Engagement, partOf, Passive Candidate Engagement>
+<Global Recruitment Strategy, connectedTo, Background Check>
+<Global Recruitment Strategy, partOf, Negotiation>
+<Headhunting, connectedTo, Job Description Creation>
+<Headhunting, partOf, Passive Candidate Engagement>
+<Interview Panel Coordination, connectedTo, Competency_Based Interviewing>
+<Offer Extension, connectedTo, Video Interviewing>
+<Offer Extension, partOf, Passive Candidate Engagement>
+<Recruitment Marketing, connectedTo, Campus Recruitment>
+<Recruitment Process Outsourcing Management, connectedTo, Background Check>
+<Recruitment Process Outsourcing Management, connectedTo, Recruitment Marketing>
+<Recruitment Process Outsourcing Management, connectedTo, Social Recruiting>
+<Social Recruiting, connectedTo, Candidate Assessment Design>
+<Social Recruiting, connectedTo, Recruitment Marketing>
+<Video Interviewing, connectedTo, Headhunting>
+<Video Interviewing, partOf, Passive Candidate Engagement>
+<start, connectedTo, Competency_Based Interviewing>
+<start, connectedTo, Job Description Creation>
+<start, connectedTo, Recruitment Marketing>
+<start, connectedTo, Recruitment Process Outsourcing Management>
+<start, connectedTo, Social Recruiting>
diff --git a/test/mermaid/hard/mermaid_101.mmd b/test/mermaid/hard/mermaid_101.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..e46e0bada702691df909c005a26ec924005fca11
--- /dev/null
+++ b/test/mermaid/hard/mermaid_101.mmd
@@ -0,0 +1,100 @@
+graph BT
+    N0([Negotiation])
+    N1[(Employee Referral Program)]
+    N2[(Interview Panel Coordination)]
+    N3[(Psychometric Testing)]
+    N4[/Employer Branding/]
+    N5(Recruitment Process Outsourcing Management)
+    N6[/Job Description Creation/]
+    N7[Recruitment Marketing]
+    N8(Recruitment Analytics)
+    N9[Social Recruiting]
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Video Interviewing
+        nest0_0([Diversity Sourcing])
+        nest0_1[[Passive Candidate Engagement]]
+        nest0_2[[Candidate Feedback Collection]]
+        nest0_3[Compliance in Hiring]
+    end
+    subgraph Background Check
+        nest1_0[/Talent Pipeline Building/]
+        nest1_1[(Competency_Based Interviewing)]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> |verifies| N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N3 -.-> nest0_0
+    nest0_3 --> N3
+    nest1_0 -.-> |interviews| nest1_1
+    N7 -.-> nest1_0
+    nest1_1 -.-> N3
+    N4 --> S1
+    S1 -.-> N9
+    S1 --> N8
+    S1 --> N6
+    N6 -.-> M0
+    N1 --> M0
+    M0 --> N8
+    N3 -.-> |headhunts| M1
+    N1 --> M1
+    N0 -.-> M1
+    M1 --> N9
+    style N0 fill:#D3D7EB,stroke:#8C9EFF
+    style N1 fill:#F3E5F5,stroke:#BA68C8
+    style N2 fill:#D3D7EB,stroke:#8C9EFF
+    style N3 fill:#D3D7EB,stroke:#8C9EFF
+    style N4 fill:#D3D7EB,stroke:#8C9EFF
+    style N5 fill:#F3E5F5,stroke:#BA68C8
+    style N6 fill:#F3E5F5,stroke:#BA68C8
+    style N7 fill:#F8BBD0,stroke:#E91E63
+    style N8 fill:#F8BBD0,stroke:#E91E63
+    style N9 fill:#F8BBD0,stroke:#E91E63
+    style S1 fill:#F8BBD0,stroke:#E91E63
+    style M0 fill:#F3E5F5,stroke:#BA68C8
+    style M1 fill:#D3D7EB,stroke:#8C9EFF
+    style nest0_0 fill:#D3D7EB,stroke:#8C9EFF
+    style nest0_1 fill:#F3E5F5,stroke:#BA68C8
+    style nest0_2 fill:#F8BBD0,stroke:#E91E63
+    style nest0_3 fill:#F3E5F5,stroke:#BA68C8
+    style nest1_0 fill:#F3E5F5,stroke:#BA68C8
+    style nest1_1 fill:#D3D7EB,stroke:#8C9EFF
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#8C9EFF,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_101.txt b/test/mermaid/hard/mermaid_101.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b76602725c9017f7e77602eb55ed4417c8396990
--- /dev/null
+++ b/test/mermaid/hard/mermaid_101.txt
@@ -0,0 +1,31 @@
+<Candidate Feedback Collection, connectedTo, Compliance in Hiring>
+<Candidate Feedback Collection, partOf, Video Interviewing>
+<Competency_Based Interviewing, connectedTo, Psychometric Testing>
+<Competency_Based Interviewing, partOf, Background Check>
+<Compliance in Hiring, connectedTo, Psychometric Testing>
+<Compliance in Hiring, partOf, Video Interviewing>
+<Diversity Sourcing, connectedTo, Passive Candidate Engagement>
+<Diversity Sourcing, partOf, Video Interviewing>
+<Employee Referral Program, connectedTo, Interview Panel Coordination>
+<Employee Referral Program, connectedTo, Recruitment Analytics>
+<Employee Referral Program, connectedTo, Social Recruiting>
+<Employer Branding, connectedTo, Job Description Creation>
+<Employer Branding, connectedTo, Recruitment Analytics>
+<Employer Branding, connectedTo, Recruitment Process Outsourcing Management>
+<Employer Branding, connectedTo, Social Recruiting>
+<Interview Panel Coordination, connectedTo, Psychometric Testing>
+<Job Description Creation, connectedTo, Recruitment Analytics>
+<Job Description Creation, connectedTo, Recruitment Marketing>
+<Negotiation, connectedTo, Employee Referral Program>
+<Negotiation, connectedTo, Social Recruiting>
+<Passive Candidate Engagement, connectedTo, Candidate Feedback Collection>
+<Passive Candidate Engagement, partOf, Video Interviewing>
+<Psychometric Testing, connectedTo, Diversity Sourcing>
+<Psychometric Testing, headhunts, Social Recruiting>
+<Psychometric Testing, verifies, Employer Branding>
+<Recruitment Analytics, connectedTo, Social Recruiting>
+<Recruitment Marketing, connectedTo, Recruitment Analytics>
+<Recruitment Marketing, connectedTo, Talent Pipeline Building>
+<Recruitment Process Outsourcing Management, connectedTo, Job Description Creation>
+<Talent Pipeline Building, interviews, Competency_Based Interviewing>
+<Talent Pipeline Building, partOf, Background Check>
diff --git a/test/mermaid/hard/mermaid_102.mmd b/test/mermaid/hard/mermaid_102.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..9d7aee9da8954a118f14dfb2f2fc8bb42f3bb35d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_102.mmd
@@ -0,0 +1,148 @@
+graph BT
+    N0([start])
+    N1(Interview Panel Coordination)
+    N2([Global Recruitment Strategy])
+    N3([Passive Candidate Engagement])
+    N4{Candidate Feedback Collection}
+    N5{Candidate Relationship Management}
+    N6{Recruitment Metrics Reporting}
+    N7[Job Fair Organization]
+    N8[[Job Description Creation]]
+    N9[/Candidate Experience Management/]
+    N10[[Reference Checking]]
+    N11[(Candidate Assessment Design)]
+    N12[/Recruitment Process Outsourcing Management/]
+    N13[Recruiter Training]
+    N14(Applicant Tracking System Management)
+    N15(Campus Recruitment)
+    N16([Freelancer Engagement])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Negotiation
+        nest0_0[Talent Pipeline Building]
+        nest0_1[Candidate Screening]
+        nest0_2[/Temporary Staffing/]
+    end
+    subgraph Internal Mobility
+        nest1_0{Headhunting}
+        nest1_1[(AI in Recruitment)]
+        nest1_2{Onboarding Handoff}
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> |hires| N7
+    N7 --> N8
+    N8 --> |refers| N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> |sources| N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 -.-> N16
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N6 --> nest0_0
+    nest0_2 --> N10
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N10 -.-> nest1_0
+    nest1_2 -.-> |tests| N4
+    N10 -.-> S0
+    S0 --> N16
+    S0 -.-> N14
+    S0 -.-> N12
+    S0 -.-> N15
+    N12 --> S1
+    S1 -.-> |optimizes| N16
+    S1 -.-> |advertises| N15
+    N7 -.-> M0
+    N0 --> M0
+    M0 -.-> N9
+    N7 --> M1
+    N8 -.-> M1
+    M1 -.-> N16
+    N5 --> M2
+    N3 --> M2
+    N1 --> M2
+    N0 -.-> M2
+    M2 --> N7
+    style N0 fill:#FCE4EC,stroke:#E91E63
+    style N1 fill:#FFCCBC,stroke:#FF5722
+    style N2 fill:#F0F4C3,stroke:#AED581
+    style N3 fill:#F0F4C3,stroke:#AED581
+    style N4 fill:#F0F4C3,stroke:#AED581
+    style N5 fill:#FFCCBC,stroke:#FF5722
+    style N6 fill:#F0F4C3,stroke:#AED581
+    style N7 fill:#FCE4EC,stroke:#E91E63
+    style N8 fill:#FFCCBC,stroke:#FF5722
+    style N9 fill:#F0F4C3,stroke:#AED581
+    style N10 fill:#FCE4EC,stroke:#E91E63
+    style N11 fill:#FCE4EC,stroke:#E91E63
+    style N12 fill:#FFCCBC,stroke:#FF5722
+    style N13 fill:#FFCCBC,stroke:#FF5722
+    style N14 fill:#FFCCBC,stroke:#FF5722
+    style N15 fill:#FCE4EC,stroke:#E91E63
+    style N16 fill:#FFCCBC,stroke:#FF5722
+    style S0 fill:#FFCCBC,stroke:#FF5722
+    style S1 fill:#FCE4EC,stroke:#E91E63
+    style M0 fill:#FCE4EC,stroke:#E91E63
+    style M1 fill:#FCE4EC,stroke:#E91E63
+    style M2 fill:#F0F4C3,stroke:#AED581
+    style nest0_0 fill:#FCE4EC,stroke:#E91E63
+    style nest0_1 fill:#FCE4EC,stroke:#E91E63
+    style nest0_2 fill:#FCE4EC,stroke:#E91E63
+    style nest1_0 fill:#F0F4C3,stroke:#AED581
+    style nest1_1 fill:#FFCCBC,stroke:#FF5722
+    style nest1_2 fill:#FFCCBC,stroke:#FF5722
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#E91E63,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_102.txt b/test/mermaid/hard/mermaid_102.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ccb86bdc8bb5991802da52374b53642f7a98262a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_102.txt
@@ -0,0 +1,44 @@
+<AI in Recruitment, connectedTo, Onboarding Handoff>
+<AI in Recruitment, partOf, Internal Mobility>
+<Applicant Tracking System Management, connectedTo, Campus Recruitment>
+<Campus Recruitment, connectedTo, Freelancer Engagement>
+<Candidate Assessment Design, sources, Recruitment Process Outsourcing Management>
+<Candidate Experience Management, connectedTo, Reference Checking>
+<Candidate Feedback Collection, connectedTo, Candidate Relationship Management>
+<Candidate Relationship Management, connectedTo, Job Fair Organization>
+<Candidate Relationship Management, connectedTo, Recruitment Metrics Reporting>
+<Candidate Screening, connectedTo, Temporary Staffing>
+<Candidate Screening, partOf, Negotiation>
+<Global Recruitment Strategy, connectedTo, Passive Candidate Engagement>
+<Headhunting, connectedTo, AI in Recruitment>
+<Headhunting, partOf, Internal Mobility>
+<Interview Panel Coordination, connectedTo, Global Recruitment Strategy>
+<Interview Panel Coordination, connectedTo, Job Fair Organization>
+<Job Description Creation, connectedTo, Freelancer Engagement>
+<Job Description Creation, refers, Candidate Experience Management>
+<Job Fair Organization, connectedTo, Candidate Experience Management>
+<Job Fair Organization, connectedTo, Freelancer Engagement>
+<Job Fair Organization, connectedTo, Job Description Creation>
+<Onboarding Handoff, partOf, Internal Mobility>
+<Onboarding Handoff, tests, Candidate Feedback Collection>
+<Passive Candidate Engagement, connectedTo, Candidate Feedback Collection>
+<Passive Candidate Engagement, connectedTo, Job Fair Organization>
+<Recruiter Training, connectedTo, Applicant Tracking System Management>
+<Recruitment Metrics Reporting, connectedTo, Talent Pipeline Building>
+<Recruitment Metrics Reporting, hires, Job Fair Organization>
+<Recruitment Process Outsourcing Management, advertises, Campus Recruitment>
+<Recruitment Process Outsourcing Management, connectedTo, Recruiter Training>
+<Recruitment Process Outsourcing Management, optimizes, Freelancer Engagement>
+<Reference Checking, connectedTo, Applicant Tracking System Management>
+<Reference Checking, connectedTo, Campus Recruitment>
+<Reference Checking, connectedTo, Candidate Assessment Design>
+<Reference Checking, connectedTo, Freelancer Engagement>
+<Reference Checking, connectedTo, Headhunting>
+<Reference Checking, connectedTo, Recruitment Process Outsourcing Management>
+<Talent Pipeline Building, connectedTo, Candidate Screening>
+<Talent Pipeline Building, partOf, Negotiation>
+<Temporary Staffing, connectedTo, Reference Checking>
+<Temporary Staffing, partOf, Negotiation>
+<start, connectedTo, Candidate Experience Management>
+<start, connectedTo, Interview Panel Coordination>
+<start, connectedTo, Job Fair Organization>
diff --git a/test/mermaid/hard/mermaid_103.mmd b/test/mermaid/hard/mermaid_103.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..dc345139e099af807df5f340d956ee3fb12e2718
--- /dev/null
+++ b/test/mermaid/hard/mermaid_103.mmd
@@ -0,0 +1,103 @@
+graph BT
+    N0([start])
+    N1(Proactive Communication)
+    N2(Service Blueprinting)
+    N3([Order Status Check])
+    N4(Complaint Resolution)
+    N5([Accessibility Support])
+    N6(Email Support)
+    N7{Customer Retention Strategies}
+    N8[Customer Journey Mapping]
+    N9[Virtual Assistant Interaction]
+    N10[Customer Relationship Management System Use]
+    N11[Customer Loyalty Program Support]
+    N12[FAQ Management]
+    N13[Technical Support]
+    N14[First Contact Resolution Optimization]
+    N15([end])
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Feedback Collection
+        nest0_0([Customer Onboarding Support])
+        nest0_1(Customer Success Management)
+        nest0_2[Phone Support]
+        nest0_3[Service Level Agreement Monitoring]
+    end
+    subgraph Customer Satisfaction Survey
+        nest1_0(Up_selling Opportunities)
+        nest1_1{Sentiment Analysis}
+        nest1_2[Feedback Loop to Product Development]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> |yes| N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 --> N11
+    N11 --> N12
+    N12 -.-> N13
+    N13 --> N14
+    N14 --> N15
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N4 -.-> nest0_0
+    nest0_3 -.-> N15
+    nest1_0 -.-> |no| nest1_1
+    nest1_1 --> nest1_2
+    N1 -.-> |no| nest1_0
+    nest1_2 -.-> N7
+    N10 -.-> S1
+    S1 -.-> N15
+    S1 --> N14
+    S1 -.-> N12
+    N1 --> M0
+    N9 -.-> M0
+    M0 -.-> N14
+    N7 --> M1
+    N8 -.-> M1
+    M1 -.-> N14
+    style S1 fill:#FFECB3,stroke:#FFC107
+    style M0 fill:#C2E8E6,stroke:#61CAC3
+    style M1 fill:#FFECB3,stroke:#FFC107
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#61CAC3,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_103.txt b/test/mermaid/hard/mermaid_103.txt
new file mode 100644
index 0000000000000000000000000000000000000000..bf2315ace47e6096e2d9a355ef5af972af84afd4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_103.txt
@@ -0,0 +1,38 @@
+<Accessibility Support, connectedTo, Email Support>
+<Complaint Resolution, connectedTo, Accessibility Support>
+<Complaint Resolution, connectedTo, Customer Onboarding Support>
+<Customer Journey Mapping, connectedTo, First Contact Resolution Optimization>
+<Customer Journey Mapping, connectedTo, Virtual Assistant Interaction>
+<Customer Loyalty Program Support, connectedTo, FAQ Management>
+<Customer Onboarding Support, connectedTo, Customer Success Management>
+<Customer Onboarding Support, partOf, Feedback Collection>
+<Customer Relationship Management System Use, connectedTo, Customer Loyalty Program Support>
+<Customer Relationship Management System Use, connectedTo, FAQ Management>
+<Customer Relationship Management System Use, connectedTo, First Contact Resolution Optimization>
+<Customer Relationship Management System Use, connectedTo, end>
+<Customer Retention Strategies, connectedTo, Customer Journey Mapping>
+<Customer Retention Strategies, connectedTo, First Contact Resolution Optimization>
+<Customer Success Management, connectedTo, Phone Support>
+<Customer Success Management, partOf, Feedback Collection>
+<Email Support, connectedTo, Customer Retention Strategies>
+<FAQ Management, connectedTo, Technical Support>
+<Feedback Loop to Product Development, connectedTo, Customer Retention Strategies>
+<Feedback Loop to Product Development, partOf, Customer Satisfaction Survey>
+<First Contact Resolution Optimization, connectedTo, end>
+<Order Status Check, yes, Complaint Resolution>
+<Phone Support, connectedTo, Service Level Agreement Monitoring>
+<Phone Support, partOf, Feedback Collection>
+<Proactive Communication, connectedTo, First Contact Resolution Optimization>
+<Proactive Communication, connectedTo, Service Blueprinting>
+<Proactive Communication, no, Up_selling Opportunities>
+<Sentiment Analysis, connectedTo, Feedback Loop to Product Development>
+<Sentiment Analysis, partOf, Customer Satisfaction Survey>
+<Service Blueprinting, connectedTo, Order Status Check>
+<Service Level Agreement Monitoring, connectedTo, end>
+<Service Level Agreement Monitoring, partOf, Feedback Collection>
+<Technical Support, connectedTo, First Contact Resolution Optimization>
+<Up_selling Opportunities, no, Sentiment Analysis>
+<Up_selling Opportunities, partOf, Customer Satisfaction Survey>
+<Virtual Assistant Interaction, connectedTo, Customer Relationship Management System Use>
+<Virtual Assistant Interaction, connectedTo, First Contact Resolution Optimization>
+<start, connectedTo, Proactive Communication>
diff --git a/test/mermaid/hard/mermaid_104.mmd b/test/mermaid/hard/mermaid_104.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..d17b3f945e8d64efccd48ef8924d028e22f6d8ad
--- /dev/null
+++ b/test/mermaid/hard/mermaid_104.mmd
@@ -0,0 +1,130 @@
+graph BT
+    N0([Sentiment Analysis])
+    N1(Technical Support)
+    N2[Cross_selling Opportunities]
+    N3(Service Blueprinting)
+    N4[/Personalized Assistance/]
+    N5[Service Recovery]
+    N6[[Inquiry Handling]]
+    N7{Self_Service Portal Management}
+    N8[[Customer Success Management]]
+    N9[(Service Level Agreement Monitoring)]
+    N10(Feedback Loop to Product Development)
+    N11[Customer Journey Mapping]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Refund Processing
+        nest0_0[Knowledge Base Creation]
+        nest0_1(Up_selling Opportunities)
+        nest0_2[Customer Relationship Management System Use]
+        nest0_3[[Complaint Trend Analysis]]
+    end
+    subgraph Complaint Resolution
+        nest1_0(Customer Onboarding Support)
+        nest1_1([Live Chat Support])
+        nest1_2{Customer Loyalty Program Support}
+    end
+    N0 --> N1
+    N1 --> |refunds| N2
+    N2 --> |troubleshoots| N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N9 --> nest0_0
+    nest0_3 -.-> N4
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N4 -.-> |educates| nest1_0
+    nest1_2 -.-> N11
+    N1 --> S0
+    S0 -.-> N5
+    S0 --> N10
+    N7 -.-> S1
+    S1 --> N11
+    S1 --> N10
+    N2 --> S2
+    S2 -.-> N11
+    S2 -.-> N5
+    N3 --> M0
+    N2 -.-> M0
+    N0 -.-> M0
+    M0 --> N5
+    N3 --> M1
+    N4 --> M1
+    N1 --> M1
+    N5 -.-> M1
+    M1 --> N7
+    style N0 fill:#FFF6D9,stroke:#FFCC7A
+    style N1 fill:#E8F5E9,stroke:#66BB6A
+    style N2 fill:#FFF6D9,stroke:#FFCC7A
+    style N3 fill:#FFF6D9,stroke:#FFCC7A
+    style N4 fill:#E0F2F1,stroke:#4DB6AC
+    style N5 fill:#FFF6D9,stroke:#FFCC7A
+    style N6 fill:#FFF6D9,stroke:#FFCC7A
+    style N7 fill:#E0F2F1,stroke:#4DB6AC
+    style N8 fill:#E8F5E9,stroke:#66BB6A
+    style N9 fill:#FFF6D9,stroke:#FFCC7A
+    style N10 fill:#FFF6D9,stroke:#FFCC7A
+    style N11 fill:#FFF6D9,stroke:#FFCC7A
+    style S0 fill:#E0F2F1,stroke:#4DB6AC
+    style S1 fill:#E0F2F1,stroke:#4DB6AC
+    style S2 fill:#E8F5E9,stroke:#66BB6A
+    style M0 fill:#E0F2F1,stroke:#4DB6AC
+    style M1 fill:#E0F2F1,stroke:#4DB6AC
+    style nest0_0 fill:#E0F2F1,stroke:#4DB6AC
+    style nest0_1 fill:#FFF6D9,stroke:#FFCC7A
+    style nest0_2 fill:#FFF6D9,stroke:#FFCC7A
+    style nest0_3 fill:#E8F5E9,stroke:#66BB6A
+    style nest1_0 fill:#E8F5E9,stroke:#66BB6A
+    style nest1_1 fill:#E0F2F1,stroke:#4DB6AC
+    style nest1_2 fill:#E0F2F1,stroke:#4DB6AC
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_105.mmd b/test/mermaid/hard/mermaid_105.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..bc8f4947f7f85071ef11872d0200f90ef037768b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_105.mmd
@@ -0,0 +1,119 @@
+graph BT
+    N0([start])
+    N1([Phone Support])
+    N2[(Customer Retention Strategies)]
+    N3(Live Chat Support)
+    N4[Customer Satisfaction Survey]
+    N5(Email Support)
+    N6([Up_selling Opportunities])
+    N7[Customer Success Management]
+    N8{Complaint Trend Analysis}
+    N9(Call Center Management)
+    N10[/Order Status Check/]
+    N11{Inquiry Handling}
+    N12[(Training Customer Service Agents)]
+    N13[Proactive Communication]
+    N14([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Self_Service Portal Management
+        nest0_0[(Service Level Agreement Monitoring)]
+        nest0_1[Issue Escalation]
+        nest0_2[(Account Management)]
+        nest0_3[[Multilingual Support]]
+    end
+    subgraph Feedback Collection
+        nest1_0[Sentiment Analysis]
+        nest1_1[FAQ Management]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    N10 --> N11
+    N11 --> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N3 --> nest0_0
+    nest0_3 --> N10
+    nest1_0 -.-> nest1_1
+    N2 -.-> nest1_0
+    nest1_1 -.-> N3
+    N3 --> S0
+    S0 -.-> N8
+    S0 -.-> N5
+    S0 -.-> N14
+    N3 --> S1
+    S1 --> N6
+    S1 -.-> N8
+    S1 --> N12
+    N10 -.-> S2
+    S2 --> N13
+    S2 -.-> N12
+    N2 --> M0
+    N4 --> M0
+    N3 --> M0
+    M0 --> N8
+    N10 --> M1
+    N4 --> M1
+    N5 --> M1
+    M1 --> N14
+    style S0 fill:#E0F2F1,stroke:#26A69A
+    style S1 fill:#E0F2F1,stroke:#26A69A
+    style S2 fill:#D1C4E9,stroke:#673AB7
+    style M0 fill:#D1C4E9,stroke:#673AB7
+    style M1 fill:#D3D7EB,stroke:#8C9EFF
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#8C9EFF,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_105.txt b/test/mermaid/hard/mermaid_105.txt
new file mode 100644
index 0000000000000000000000000000000000000000..beb4b123e33655c347dbfe4f4f881abf02e27c2b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_105.txt
@@ -0,0 +1,40 @@
+<Account Management, connectedTo, Multilingual Support>
+<Account Management, partOf, Self_Service Portal Management>
+<Call Center Management, connectedTo, Order Status Check>
+<Complaint Trend Analysis, connectedTo, Call Center Management>
+<Customer Retention Strategies, connectedTo, Complaint Trend Analysis>
+<Customer Retention Strategies, connectedTo, Live Chat Support>
+<Customer Retention Strategies, connectedTo, Sentiment Analysis>
+<Customer Satisfaction Survey, connectedTo, Complaint Trend Analysis>
+<Customer Satisfaction Survey, connectedTo, Email Support>
+<Customer Satisfaction Survey, connectedTo, end>
+<Customer Success Management, connectedTo, Complaint Trend Analysis>
+<Email Support, connectedTo, Up_selling Opportunities>
+<Email Support, connectedTo, end>
+<FAQ Management, connectedTo, Live Chat Support>
+<FAQ Management, partOf, Feedback Collection>
+<Inquiry Handling, connectedTo, Training Customer Service Agents>
+<Issue Escalation, connectedTo, Account Management>
+<Issue Escalation, partOf, Self_Service Portal Management>
+<Live Chat Support, connectedTo, Complaint Trend Analysis>
+<Live Chat Support, connectedTo, Customer Satisfaction Survey>
+<Live Chat Support, connectedTo, Email Support>
+<Live Chat Support, connectedTo, Service Level Agreement Monitoring>
+<Live Chat Support, connectedTo, Training Customer Service Agents>
+<Live Chat Support, connectedTo, Up_selling Opportunities>
+<Live Chat Support, connectedTo, end>
+<Multilingual Support, connectedTo, Order Status Check>
+<Multilingual Support, partOf, Self_Service Portal Management>
+<Order Status Check, connectedTo, Inquiry Handling>
+<Order Status Check, connectedTo, Proactive Communication>
+<Order Status Check, connectedTo, Training Customer Service Agents>
+<Order Status Check, connectedTo, end>
+<Phone Support, connectedTo, Customer Retention Strategies>
+<Proactive Communication, connectedTo, end>
+<Sentiment Analysis, connectedTo, FAQ Management>
+<Sentiment Analysis, partOf, Feedback Collection>
+<Service Level Agreement Monitoring, connectedTo, Issue Escalation>
+<Service Level Agreement Monitoring, partOf, Self_Service Portal Management>
+<Training Customer Service Agents, connectedTo, Proactive Communication>
+<Up_selling Opportunities, connectedTo, Customer Success Management>
+<start, connectedTo, Phone Support>
diff --git a/test/mermaid/hard/mermaid_106.mmd b/test/mermaid/hard/mermaid_106.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..563f24f5ee6fb7a38f93c9dde8929f3d31a5099e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_106.mmd
@@ -0,0 +1,140 @@
+graph LR
+    N0([start])
+    N1[(Production Scheduling Integration)]
+    N2[(Supplier Selection)]
+    N3[/Warehousing/]
+    N4[Sustainability Initiatives]
+    N5(Risk Management)
+    N6[(Container Tracking)]
+    N7[Warehouse Automation]
+    N8([Last_Mile Delivery Optimization])
+    N9[Production Planning]
+    N10([Risk Mitigation Strategies])
+    N11[Intermodal Transportation]
+    N12[(Digital Twin of Supply Chain)]
+    N13[Third_Party Logistics Management]
+    N14(Data Analytics for Supply Chain)
+    N15([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Resilience Planning
+        nest0_0[Logistics Optimization]
+        nest0_1(Distribution Network Design)
+        nest0_2[Hazardous Materials Handling]
+        nest0_3[[Cold Chain Logistics]]
+    end
+    subgraph Vendor Managed Inventory
+        nest1_0(Supply Chain Visibility)
+        nest1_1[/Material Flow Management/]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> |automates| N10
+    N10 -.-> |innovates| N11
+    N11 -.-> N12
+    N12 --> |analyzes| N13
+    N13 --> N14
+    N14 --> N15
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N7 -.-> nest0_0
+    nest0_3 --> N11
+    nest1_0 --> nest1_1
+    N2 --> nest1_0
+    nest1_1 -.-> N1
+    N5 --> S0
+    S0 -.-> N9
+    S0 -.-> N10
+    S0 -.-> N14
+    N9 -.-> S1
+    S1 -.-> N14
+    S1 -.-> N12
+    S1 --> N15
+    N12 -.-> S2
+    S2 --> N14
+    S2 --> N15
+    N8 --> M0
+    N9 -.-> M0
+    M0 -.-> N15
+    N4 -.-> M1
+    N1 -.-> M1
+    M1 -.-> N7
+    style N0 fill:#F9FBE7,stroke:#DCE775
+    style N1 fill:#EFE6FF,stroke:#C2B2F0
+    style N2 fill:#F9FBE7,stroke:#DCE775
+    style N3 fill:#C5CAE9,stroke:#3F51B5
+    style N4 fill:#C5CAE9,stroke:#3F51B5
+    style N5 fill:#EFE6FF,stroke:#C2B2F0
+    style N6 fill:#F9FBE7,stroke:#DCE775
+    style N7 fill:#EFE6FF,stroke:#C2B2F0
+    style N8 fill:#C5CAE9,stroke:#3F51B5
+    style N9 fill:#F9FBE7,stroke:#DCE775
+    style N10 fill:#EFE6FF,stroke:#C2B2F0
+    style N11 fill:#C5CAE9,stroke:#3F51B5
+    style N12 fill:#F9FBE7,stroke:#DCE775
+    style N13 fill:#EFE6FF,stroke:#C2B2F0
+    style N14 fill:#EFE6FF,stroke:#C2B2F0
+    style N15 fill:#EFE6FF,stroke:#C2B2F0
+    style S0 fill:#F9FBE7,stroke:#DCE775
+    style S1 fill:#F9FBE7,stroke:#DCE775
+    style S2 fill:#EFE6FF,stroke:#C2B2F0
+    style M0 fill:#F9FBE7,stroke:#DCE775
+    style M1 fill:#F9FBE7,stroke:#DCE775
+    style nest0_0 fill:#EFE6FF,stroke:#C2B2F0
+    style nest0_1 fill:#F9FBE7,stroke:#DCE775
+    style nest0_2 fill:#EFE6FF,stroke:#C2B2F0
+    style nest0_3 fill:#F9FBE7,stroke:#DCE775
+    style nest1_0 fill:#EFE6FF,stroke:#C2B2F0
+    style nest1_1 fill:#F9FBE7,stroke:#DCE775
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_106.txt b/test/mermaid/hard/mermaid_106.txt
new file mode 100644
index 0000000000000000000000000000000000000000..46875d79fc04613205f7ce1e74878f7c12fa72b5
--- /dev/null
+++ b/test/mermaid/hard/mermaid_106.txt
@@ -0,0 +1,40 @@
+<Cold Chain Logistics, connectedTo, Intermodal Transportation>
+<Cold Chain Logistics, partOf, Resilience Planning>
+<Container Tracking, connectedTo, Warehouse Automation>
+<Data Analytics for Supply Chain, connectedTo, end>
+<Digital Twin of Supply Chain, analyzes, Third_Party Logistics Management>
+<Digital Twin of Supply Chain, connectedTo, Data Analytics for Supply Chain>
+<Digital Twin of Supply Chain, connectedTo, end>
+<Distribution Network Design, connectedTo, Hazardous Materials Handling>
+<Distribution Network Design, partOf, Resilience Planning>
+<Hazardous Materials Handling, connectedTo, Cold Chain Logistics>
+<Hazardous Materials Handling, partOf, Resilience Planning>
+<Intermodal Transportation, connectedTo, Digital Twin of Supply Chain>
+<Last_Mile Delivery Optimization, connectedTo, Production Planning>
+<Last_Mile Delivery Optimization, connectedTo, end>
+<Logistics Optimization, connectedTo, Distribution Network Design>
+<Logistics Optimization, partOf, Resilience Planning>
+<Material Flow Management, connectedTo, Production Scheduling Integration>
+<Material Flow Management, partOf, Vendor Managed Inventory>
+<Production Planning, automates, Risk Mitigation Strategies>
+<Production Planning, connectedTo, Data Analytics for Supply Chain>
+<Production Planning, connectedTo, Digital Twin of Supply Chain>
+<Production Planning, connectedTo, end>
+<Production Scheduling Integration, connectedTo, Supplier Selection>
+<Production Scheduling Integration, connectedTo, Warehouse Automation>
+<Risk Management, connectedTo, Container Tracking>
+<Risk Management, connectedTo, Data Analytics for Supply Chain>
+<Risk Management, connectedTo, Production Planning>
+<Risk Management, connectedTo, Risk Mitigation Strategies>
+<Risk Mitigation Strategies, innovates, Intermodal Transportation>
+<Supplier Selection, connectedTo, Supply Chain Visibility>
+<Supplier Selection, connectedTo, Warehousing>
+<Supply Chain Visibility, connectedTo, Material Flow Management>
+<Supply Chain Visibility, partOf, Vendor Managed Inventory>
+<Sustainability Initiatives, connectedTo, Risk Management>
+<Sustainability Initiatives, connectedTo, Warehouse Automation>
+<Third_Party Logistics Management, connectedTo, Data Analytics for Supply Chain>
+<Warehouse Automation, connectedTo, Last_Mile Delivery Optimization>
+<Warehouse Automation, connectedTo, Logistics Optimization>
+<Warehousing, connectedTo, Sustainability Initiatives>
+<start, connectedTo, Production Scheduling Integration>
diff --git a/test/mermaid/hard/mermaid_107.mmd b/test/mermaid/hard/mermaid_107.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..5a3634e00463d43dc5cb84ce46a2008ac0b6c2f9
--- /dev/null
+++ b/test/mermaid/hard/mermaid_107.mmd
@@ -0,0 +1,91 @@
+graph TD
+    N0([start])
+    N1[Performance Monitoring]
+    N2[[Blockchain for Traceability]]
+    N3[Resilience Planning]
+    N4[Circular Economy Practices]
+    N5[[Demand Planning]]
+    N6[(Warehouse Automation)]
+    N7[Supplier Selection]
+    N8[[Last_Mile Delivery Optimization]]
+    N9(Container Tracking)
+    N10[[Data Analytics for Supply Chain]]
+    N11[Order Fulfillment]
+    S0(( ))
+    S1(( ))
+    M1(( ))
+    subgraph Vendor Managed Inventory
+        nest0_0[Supply Chain Finance]
+        nest0_1([Contract Manufacturing Oversight])
+        nest0_2[[Sustainability Initiatives]]
+    end
+    subgraph Procurement
+        nest1_0[Customs Compliance]
+        nest1_1(Material Flow Management)
+        nest1_2[/Reverse Logistics/]
+        nest1_3[Logistics Optimization]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N10 --> nest0_0
+    nest0_2 --> N2
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 -.-> nest1_3
+    N9 -.-> nest1_0
+    nest1_3 --> N9
+    N3 --> S0
+    S0 -.-> N11
+    S0 --> N8
+    S0 --> N5
+    N1 --> S1
+    S1 -.-> N5
+    S1 -.-> N10
+    N7 --> M1
+    N0 -.-> M1
+    M1 --> N11
+    style S0 fill:#BBDEFB,stroke:#2196F3
+    style S1 fill:#FCE4EC,stroke:#E91E63
+    style M1 fill:#C2E8E6,stroke:#61CAC3
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#E91E63,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_107.txt b/test/mermaid/hard/mermaid_107.txt
new file mode 100644
index 0000000000000000000000000000000000000000..add5d59beefeda25e264b4b75e454fb040a221ec
--- /dev/null
+++ b/test/mermaid/hard/mermaid_107.txt
@@ -0,0 +1,34 @@
+<Blockchain for Traceability, connectedTo, Resilience Planning>
+<Circular Economy Practices, connectedTo, Demand Planning>
+<Container Tracking, connectedTo, Customs Compliance>
+<Container Tracking, connectedTo, Data Analytics for Supply Chain>
+<Contract Manufacturing Oversight, connectedTo, Sustainability Initiatives>
+<Contract Manufacturing Oversight, partOf, Vendor Managed Inventory>
+<Customs Compliance, connectedTo, Material Flow Management>
+<Customs Compliance, partOf, Procurement>
+<Data Analytics for Supply Chain, connectedTo, Order Fulfillment>
+<Data Analytics for Supply Chain, connectedTo, Supply Chain Finance>
+<Demand Planning, connectedTo, Warehouse Automation>
+<Last_Mile Delivery Optimization, connectedTo, Container Tracking>
+<Logistics Optimization, connectedTo, Container Tracking>
+<Logistics Optimization, partOf, Procurement>
+<Material Flow Management, connectedTo, Reverse Logistics>
+<Material Flow Management, partOf, Procurement>
+<Performance Monitoring, connectedTo, Blockchain for Traceability>
+<Performance Monitoring, connectedTo, Data Analytics for Supply Chain>
+<Performance Monitoring, connectedTo, Demand Planning>
+<Resilience Planning, connectedTo, Circular Economy Practices>
+<Resilience Planning, connectedTo, Demand Planning>
+<Resilience Planning, connectedTo, Last_Mile Delivery Optimization>
+<Resilience Planning, connectedTo, Order Fulfillment>
+<Reverse Logistics, connectedTo, Logistics Optimization>
+<Reverse Logistics, partOf, Procurement>
+<Supplier Selection, connectedTo, Last_Mile Delivery Optimization>
+<Supplier Selection, connectedTo, Order Fulfillment>
+<Supply Chain Finance, connectedTo, Contract Manufacturing Oversight>
+<Supply Chain Finance, partOf, Vendor Managed Inventory>
+<Sustainability Initiatives, connectedTo, Blockchain for Traceability>
+<Sustainability Initiatives, partOf, Vendor Managed Inventory>
+<Warehouse Automation, connectedTo, Supplier Selection>
+<start, connectedTo, Order Fulfillment>
+<start, connectedTo, Performance Monitoring>
diff --git a/test/mermaid/hard/mermaid_108.mmd b/test/mermaid/hard/mermaid_108.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..25012948a547c34621aff9e63b7ed083508dd045
--- /dev/null
+++ b/test/mermaid/hard/mermaid_108.mmd
@@ -0,0 +1,138 @@
+graph LR
+    N0([Distribution Network Design])
+    N1[(Warehousing)]
+    N2{Performance Monitoring}
+    N3([Supplier Selection])
+    N4([Intermodal Transportation])
+    N5[Last_Mile Delivery Optimization]
+    N6(Resilience Planning)
+    N7[[Freight Auditing]]
+    N8[/Production Scheduling Integration/]
+    N9[(Blockchain for Traceability)]
+    N10{Quality Control in Supply Chain}
+    N11(Supplier Relationship Management)
+    N12(Data Analytics for Supply Chain)
+    N13[[Container Tracking]]
+    N14[[Digital Twin of Supply Chain]]
+    N15[Material Flow Management]
+    N16(Warehouse Automation)
+    N17([end])
+    S0(( ))
+    S1(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Global Sourcing Strategy
+        nest0_0[(Predictive Analytics)]
+        nest0_1(Logistics Optimization)
+    end
+    subgraph Production Planning
+        nest1_0[(Supply Chain Visibility)]
+        nest1_1[Reverse Logistics]
+        nest1_2[(Order Fulfillment)]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> |distributes| N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> |manages| N13
+    N13 --> N14
+    N14 -.-> N15
+    N15 --> N16
+    N16 --> N17
+    nest0_0 --> nest0_1
+    N15 -.-> nest0_0
+    nest0_1 -.-> N4
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N5 --> nest1_0
+    nest1_2 --> N12
+    N9 --> S0
+    S0 --> |licenses| N11
+    S0 -.-> N16
+    S0 -.-> N13
+    N2 --> S1
+    S1 --> N12
+    S1 --> N11
+    S1 -.-> N8
+    N1 --> M1
+    N7 -.-> M1
+    N13 --> M1
+    M1 -.-> N15
+    N4 -.-> M2
+    N5 -.-> M2
+    M2 --> N9
+    style N0 fill:#FFDCD6,stroke:#FFB2A5
+    style N1 fill:#E6EE9C,stroke:#CDDC39
+    style N2 fill:#FFECB3,stroke:#FFC107
+    style N3 fill:#FFECB3,stroke:#FFC107
+    style N4 fill:#FFECB3,stroke:#FFC107
+    style N5 fill:#FFDCD6,stroke:#FFB2A5
+    style N6 fill:#FFDCD6,stroke:#FFB2A5
+    style N7 fill:#E6EE9C,stroke:#CDDC39
+    style N8 fill:#FFDCD6,stroke:#FFB2A5
+    style N9 fill:#FFECB3,stroke:#FFC107
+    style N10 fill:#FFECB3,stroke:#FFC107
+    style N11 fill:#FFDCD6,stroke:#FFB2A5
+    style N12 fill:#FFECB3,stroke:#FFC107
+    style N13 fill:#E6EE9C,stroke:#CDDC39
+    style N14 fill:#FFECB3,stroke:#FFC107
+    style N15 fill:#FFECB3,stroke:#FFC107
+    style N16 fill:#FFDCD6,stroke:#FFB2A5
+    style N17 fill:#FFDCD6,stroke:#FFB2A5
+    style S0 fill:#FFDCD6,stroke:#FFB2A5
+    style S1 fill:#FFECB3,stroke:#FFC107
+    style M1 fill:#FFDCD6,stroke:#FFB2A5
+    style M2 fill:#FFECB3,stroke:#FFC107
+    style nest0_0 fill:#E6EE9C,stroke:#CDDC39
+    style nest0_1 fill:#FFECB3,stroke:#FFC107
+    style nest1_0 fill:#FFDCD6,stroke:#FFB2A5
+    style nest1_1 fill:#E6EE9C,stroke:#CDDC39
+    style nest1_2 fill:#FFDCD6,stroke:#FFB2A5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#FFB2A5,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_108.txt b/test/mermaid/hard/mermaid_108.txt
new file mode 100644
index 0000000000000000000000000000000000000000..1bd88f18cff519578d91d78b38c433c7a3b31ec2
--- /dev/null
+++ b/test/mermaid/hard/mermaid_108.txt
@@ -0,0 +1,40 @@
+<Blockchain for Traceability, connectedTo, Container Tracking>
+<Blockchain for Traceability, connectedTo, Warehouse Automation>
+<Blockchain for Traceability, distributes, Quality Control in Supply Chain>
+<Blockchain for Traceability, licenses, Supplier Relationship Management>
+<Container Tracking, connectedTo, Digital Twin of Supply Chain>
+<Container Tracking, connectedTo, Material Flow Management>
+<Data Analytics for Supply Chain, manages, Container Tracking>
+<Digital Twin of Supply Chain, connectedTo, Material Flow Management>
+<Distribution Network Design, connectedTo, Warehousing>
+<Freight Auditing, connectedTo, Material Flow Management>
+<Freight Auditing, connectedTo, Production Scheduling Integration>
+<Intermodal Transportation, connectedTo, Blockchain for Traceability>
+<Intermodal Transportation, connectedTo, Last_Mile Delivery Optimization>
+<Last_Mile Delivery Optimization, connectedTo, Blockchain for Traceability>
+<Last_Mile Delivery Optimization, connectedTo, Resilience Planning>
+<Last_Mile Delivery Optimization, connectedTo, Supply Chain Visibility>
+<Logistics Optimization, connectedTo, Intermodal Transportation>
+<Logistics Optimization, partOf, Global Sourcing Strategy>
+<Material Flow Management, connectedTo, Predictive Analytics>
+<Material Flow Management, connectedTo, Warehouse Automation>
+<Order Fulfillment, connectedTo, Data Analytics for Supply Chain>
+<Order Fulfillment, partOf, Production Planning>
+<Performance Monitoring, connectedTo, Data Analytics for Supply Chain>
+<Performance Monitoring, connectedTo, Production Scheduling Integration>
+<Performance Monitoring, connectedTo, Supplier Relationship Management>
+<Performance Monitoring, connectedTo, Supplier Selection>
+<Predictive Analytics, connectedTo, Logistics Optimization>
+<Predictive Analytics, partOf, Global Sourcing Strategy>
+<Production Scheduling Integration, connectedTo, Blockchain for Traceability>
+<Quality Control in Supply Chain, connectedTo, Supplier Relationship Management>
+<Resilience Planning, connectedTo, Freight Auditing>
+<Reverse Logistics, connectedTo, Order Fulfillment>
+<Reverse Logistics, partOf, Production Planning>
+<Supplier Relationship Management, connectedTo, Data Analytics for Supply Chain>
+<Supplier Selection, connectedTo, Intermodal Transportation>
+<Supply Chain Visibility, connectedTo, Reverse Logistics>
+<Supply Chain Visibility, partOf, Production Planning>
+<Warehouse Automation, connectedTo, end>
+<Warehousing, connectedTo, Material Flow Management>
+<Warehousing, connectedTo, Performance Monitoring>
diff --git a/test/mermaid/hard/mermaid_109.txt b/test/mermaid/hard/mermaid_109.txt
new file mode 100644
index 0000000000000000000000000000000000000000..157e1dc7a90b833ef0da2e5d36556421c1133794
--- /dev/null
+++ b/test/mermaid/hard/mermaid_109.txt
@@ -0,0 +1,37 @@
+<Community Relations, connectedTo, Mineral Processing>
+<Community Relations, no, Ore Sorting>
+<Core Logging, connectedTo, Community Relations>
+<Crushing and Grinding, connectedTo, Reclamation>
+<Crushing and Grinding, partOf, Underground Mining Operations>
+<Drilling and Blasting, connectedTo, Community Relations>
+<Drilling and Blasting, connectedTo, Core Logging>
+<Drilling and Blasting, connectedTo, Equipment Maintenance>
+<Drilling and Blasting, connectedTo, Mine Dewatering>
+<Drilling and Blasting, connectedTo, Mineral Processing>
+<Drilling and Blasting, connectedTo, Ore Extraction>
+<Drilling and Blasting, no, Equipment Maintenance>
+<Drilling and Blasting, yes, Exploration>
+<Equipment Maintenance, connectedTo, Exploration>
+<Exploration, connectedTo, Community Relations>
+<Exploration, connectedTo, Core Logging>
+<Exploration, connectedTo, Mineral Processing>
+<Feasibility Study, connectedTo, Drilling and Blasting>
+<Feasibility Study, connectedTo, Equipment Maintenance>
+<Feasibility Study, connectedTo, Ore Extraction>
+<Geological Survey, connectedTo, Feasibility Study>
+<Geological Survey, partOf, Underground Mining Operations>
+<Mine Dewatering, connectedTo, Crushing and Grinding>
+<Mine Dewatering, partOf, Underground Mining Operations>
+<Ore Extraction, connectedTo, Equipment Maintenance>
+<Ore Sorting, partOf, Energy Management>
+<Ore Sorting, yes, Waste Rock Management>
+<Reclamation, connectedTo, Geological Survey>
+<Reclamation, partOf, Underground Mining Operations>
+<Regulatory Compliance Reporting, connectedTo, Exploration>
+<Regulatory Compliance Reporting, partOf, Energy Management>
+<Ventilation System, connectedTo, Regulatory Compliance Reporting>
+<Ventilation System, partOf, Energy Management>
+<Waste Rock Management, no, Ventilation System>
+<Waste Rock Management, partOf, Energy Management>
+<start, connectedTo, Feasibility Study>
+<start, connectedTo, Ore Extraction>
diff --git a/test/mermaid/hard/mermaid_11.txt b/test/mermaid/hard/mermaid_11.txt
new file mode 100644
index 0000000000000000000000000000000000000000..56f2fa764c413f9233054cd145605f90aaca5f71
--- /dev/null
+++ b/test/mermaid/hard/mermaid_11.txt
@@ -0,0 +1,37 @@
+<Attendance Tracking, connectedTo, Research Grant Application>
+<Attendance Tracking, connectedTo, School Accreditation>
+<Attendance Tracking, connectedTo, Student Feedback Collection>
+<Career Services, connectedTo, Transcript Issuance>
+<Career Services, partOf, Parent_Teacher Conference>
+<Club Registration, connectedTo, Student Application>
+<Club Registration, partOf, Certificate Issuance>
+<Curriculum Development, connectedTo, Library Registration>
+<Curriculum Development, partOf, Certificate Issuance>
+<Digital Resource Management, connectedTo, Curriculum Development>
+<Digital Resource Management, partOf, Certificate Issuance>
+<Extracurricular Activity, connectedTo, Peer Tutoring>
+<Extracurricular Activity, connectedTo, School Accreditation>
+<Grade Entry, connectedTo, Research Grant Application>
+<Grade Entry, connectedTo, School Accreditation>
+<Grade Entry, connectedTo, Student Application>
+<Grade Entry, connectedTo, Thesis Submission>
+<Lecture Delivery, connectedTo, Student Enrollment>
+<Lecture Delivery, partOf, Parent_Teacher Conference>
+<Library Registration, connectedTo, Club Registration>
+<Library Registration, partOf, Certificate Issuance>
+<Peer Tutoring, connectedTo, Career Services>
+<Peer Tutoring, connectedTo, Grade Entry>
+<School Accreditation, connectedTo, Research Grant Application>
+<Student Application, connectedTo, Research Grant Application>
+<Student Application, connectedTo, School Accreditation>
+<Student Application, connectedTo, Thesis Submission>
+<Student Enrollment, connectedTo, Student Feedback Collection>
+<Student Enrollment, partOf, Parent_Teacher Conference>
+<Student Feedback Collection, connectedTo, Digital Resource Management>
+<Student Feedback Collection, connectedTo, Extracurricular Activity>
+<Student Feedback Collection, connectedTo, Research Grant Application>
+<Thesis Submission, connectedTo, Research Grant Application>
+<Thesis Submission, connectedTo, School Accreditation>
+<Transcript Issuance, connectedTo, Lecture Delivery>
+<Transcript Issuance, partOf, Parent_Teacher Conference>
+<start, connectedTo, Attendance Tracking>
diff --git a/test/mermaid/hard/mermaid_110.mmd b/test/mermaid/hard/mermaid_110.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..b5dc28db7ca99f9ba0caab209b5d862a9cb7363a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_110.mmd
@@ -0,0 +1,112 @@
+graph BT
+    N0([start])
+    N1(Core Logging)
+    N2([Autonomous Haulage Systems])
+    N3[[Asset Management]]
+    N4[Water Management]
+    N5[(Energy Management)]
+    N6{Exploration Drilling}
+    N7[(Environmental Impact Assessment)]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Safety Management
+        nest0_0[[Mine Dewatering]]
+        nest0_1[/Permit Acquisition/]
+        nest0_2[(Geological Survey)]
+        nest0_3(Remote Operations Center)
+    end
+    subgraph Waste Rock Management
+        nest1_0(Exploration)
+        nest1_1[Product Marketing]
+        nest1_2[(Drilling and Blasting)]
+        nest1_3[Underground Mining Operations]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> |crushes| N6
+    N6 --> N7
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N2 --> nest0_0
+    nest0_3 --> N5
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> nest1_3
+    N2 -.-> |licenses| nest1_0
+    nest1_3 -.-> N3
+    N2 -.-> S0
+    S0 --> N5
+    S0 -.-> N6
+    S0 -.-> N4
+    S0 --> N7
+    N3 -.-> S1
+    S1 -.-> N6
+    S1 --> N7
+    S1 -.-> N5
+    N2 -.-> M0
+    N0 --> M0
+    N1 --> M0
+    M0 -.-> N4
+    N0 -.-> M1
+    N1 --> M1
+    M1 --> N3
+    style N0 fill:#F9FBE7,stroke:#DCE775
+    style N1 fill:#F2E6F5,stroke:#CB9BE1
+    style N2 fill:#FFFAE0,stroke:#FFE470
+    style N3 fill:#FFFAE0,stroke:#FFE470
+    style N4 fill:#FFFAE0,stroke:#FFE470
+    style N5 fill:#FFFAE0,stroke:#FFE470
+    style N6 fill:#F9FBE7,stroke:#DCE775
+    style N7 fill:#FFFAE0,stroke:#FFE470
+    style S0 fill:#F9FBE7,stroke:#DCE775
+    style S1 fill:#F2E6F5,stroke:#CB9BE1
+    style M0 fill:#FFFAE0,stroke:#FFE470
+    style M1 fill:#F2E6F5,stroke:#CB9BE1
+    style nest0_0 fill:#F2E6F5,stroke:#CB9BE1
+    style nest0_1 fill:#FFFAE0,stroke:#FFE470
+    style nest0_2 fill:#F2E6F5,stroke:#CB9BE1
+    style nest0_3 fill:#FFFAE0,stroke:#FFE470
+    style nest1_0 fill:#F2E6F5,stroke:#CB9BE1
+    style nest1_1 fill:#FFFAE0,stroke:#FFE470
+    style nest1_2 fill:#FFFAE0,stroke:#FFE470
+    style nest1_3 fill:#F2E6F5,stroke:#CB9BE1
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#DCE775,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_110.txt b/test/mermaid/hard/mermaid_110.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ca8164e2ec340927eb4a8b4cd01a3f52afba6901
--- /dev/null
+++ b/test/mermaid/hard/mermaid_110.txt
@@ -0,0 +1,36 @@
+<Asset Management, connectedTo, Energy Management>
+<Asset Management, connectedTo, Environmental Impact Assessment>
+<Asset Management, connectedTo, Exploration Drilling>
+<Asset Management, connectedTo, Water Management>
+<Autonomous Haulage Systems, connectedTo, Asset Management>
+<Autonomous Haulage Systems, connectedTo, Energy Management>
+<Autonomous Haulage Systems, connectedTo, Environmental Impact Assessment>
+<Autonomous Haulage Systems, connectedTo, Exploration Drilling>
+<Autonomous Haulage Systems, connectedTo, Mine Dewatering>
+<Autonomous Haulage Systems, connectedTo, Water Management>
+<Autonomous Haulage Systems, licenses, Exploration>
+<Core Logging, connectedTo, Asset Management>
+<Core Logging, connectedTo, Autonomous Haulage Systems>
+<Core Logging, connectedTo, Water Management>
+<Drilling and Blasting, connectedTo, Underground Mining Operations>
+<Drilling and Blasting, partOf, Waste Rock Management>
+<Energy Management, crushes, Exploration Drilling>
+<Exploration, connectedTo, Product Marketing>
+<Exploration, partOf, Waste Rock Management>
+<Exploration Drilling, connectedTo, Environmental Impact Assessment>
+<Geological Survey, connectedTo, Remote Operations Center>
+<Geological Survey, partOf, Safety Management>
+<Mine Dewatering, connectedTo, Permit Acquisition>
+<Mine Dewatering, partOf, Safety Management>
+<Permit Acquisition, connectedTo, Geological Survey>
+<Permit Acquisition, partOf, Safety Management>
+<Product Marketing, connectedTo, Drilling and Blasting>
+<Product Marketing, partOf, Waste Rock Management>
+<Remote Operations Center, connectedTo, Energy Management>
+<Remote Operations Center, partOf, Safety Management>
+<Underground Mining Operations, connectedTo, Asset Management>
+<Underground Mining Operations, partOf, Waste Rock Management>
+<Water Management, connectedTo, Energy Management>
+<start, connectedTo, Asset Management>
+<start, connectedTo, Core Logging>
+<start, connectedTo, Water Management>
diff --git a/test/mermaid/hard/mermaid_111.mmd b/test/mermaid/hard/mermaid_111.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..d0bd622914d97eefd72f7cabd79c8cca15b79eef
--- /dev/null
+++ b/test/mermaid/hard/mermaid_111.mmd
@@ -0,0 +1,128 @@
+graph BT
+    N0([Crushing and Grinding])
+    N1[Waste Rock Management]
+    N2[Mineral Processing]
+    N3[Mine Planning]
+    N4(Smelting)
+    N5(Water Management)
+    N6[(Permit Acquisition)]
+    N7[[Product Marketing]]
+    N8[(Regulatory Compliance Reporting)]
+    N9[[Mine Closure Planning]]
+    N10[Ore Extraction]
+    N11([Geotechnical Stability Analysis])
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Mine Dewatering
+        nest0_0{Refining}
+        nest0_1[Haulage]
+        nest0_2(Autonomous Haulage Systems)
+    end
+    subgraph Robotics in Mining
+        nest1_0([Drilling and Blasting])
+        nest1_1([Core Logging])
+        nest1_2[(Tailings Management)]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> |extracts| N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> |grades| N10
+    N10 -.-> N11
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N3 --> nest0_0
+    nest0_2 --> N1
+    nest1_0 --> |audits| nest1_1
+    nest1_1 -.-> |complies| nest1_2
+    N5 -.-> nest1_0
+    nest1_2 -.-> N5
+    N1 --> S1
+    S1 -.-> N6
+    S1 --> N10
+    N5 -.-> S2
+    S2 -.-> |drills| N9
+    S2 --> N8
+    S2 -.-> |automates| N10
+    N0 -.-> |monitors| M0
+    N1 --> M0
+    N4 -.-> M0
+    M0 -.-> N6
+    N1 --> M1
+    N0 --> M1
+    N4 --> M1
+    M1 -.-> N7
+    N4 --> M2
+    N2 -.-> M2
+    N0 -.-> M2
+    M2 --> N6
+    style N0 fill:#FFF0CC,stroke:#FFCC80
+    style N1 fill:#E0F2F1,stroke:#4DB6AC
+    style N2 fill:#D3F7F9,stroke:#80DDEA
+    style N3 fill:#E0F2F1,stroke:#4DB6AC
+    style N4 fill:#D3F7F9,stroke:#80DDEA
+    style N5 fill:#FFF0CC,stroke:#FFCC80
+    style N6 fill:#E0F2F1,stroke:#4DB6AC
+    style N7 fill:#D3F7F9,stroke:#80DDEA
+    style N8 fill:#D3F7F9,stroke:#80DDEA
+    style N9 fill:#FFF0CC,stroke:#FFCC80
+    style N10 fill:#D3F7F9,stroke:#80DDEA
+    style N11 fill:#E0F2F1,stroke:#4DB6AC
+    style S1 fill:#FFF0CC,stroke:#FFCC80
+    style S2 fill:#D3F7F9,stroke:#80DDEA
+    style M0 fill:#D3F7F9,stroke:#80DDEA
+    style M1 fill:#E0F2F1,stroke:#4DB6AC
+    style M2 fill:#E0F2F1,stroke:#4DB6AC
+    style nest0_0 fill:#E0F2F1,stroke:#4DB6AC
+    style nest0_1 fill:#E0F2F1,stroke:#4DB6AC
+    style nest0_2 fill:#FFF0CC,stroke:#FFCC80
+    style nest1_0 fill:#FFF0CC,stroke:#FFCC80
+    style nest1_1 fill:#FFF0CC,stroke:#FFCC80
+    style nest1_2 fill:#E0F2F1,stroke:#4DB6AC
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#4DB6AC,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_112.mmd b/test/mermaid/hard/mermaid_112.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..744645f5f1637d647a4a979c5c3dd151842f0dff
--- /dev/null
+++ b/test/mermaid/hard/mermaid_112.mmd
@@ -0,0 +1,122 @@
+graph BT
+    N0([start])
+    N1[[Marine Research]]
+    N2[Digitalization of Shipping]
+    N3([Navigation])
+    N4[/Freight Forwarding/]
+    N5(Route Planning)
+    N6[Vessel Maintenance]
+    N7(Maritime Security)
+    N8[Marine Safety Inspection]
+    N9([Marine Data Analytics])
+    N10[Subsea Cable Laying]
+    N11[/Autonomous Vessels/]
+    N12[(Bunkering)]
+    N13([Port Congestion Management])
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Vessel Chartering
+        nest0_0([Pilotage])
+        nest0_1([Marine Insurance])
+        nest0_2(Green Shipping Initiatives)
+        nest0_3(Ship Design)
+    end
+    subgraph Pollution Control
+        nest1_0([Ship Registry])
+        nest1_1([Fuel Consumption Optimization])
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> |licenses| N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> N12
+    N12 --> N13
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N9 --> nest0_0
+    nest0_3 -.-> N3
+    nest1_0 -.-> nest1_1
+    N12 -.-> nest1_0
+    nest1_1 -.-> N1
+    N7 -.-> S1
+    S1 -.-> N13
+    S1 --> N9
+    N8 --> S2
+    S2 -.-> N13
+    S2 --> N11
+    N1 -.-> |fuels| M0
+    N0 --> M0
+    M0 --> N3
+    N1 --> M1
+    N3 -.-> M1
+    N4 -.-> M1
+    M1 --> N6
+    style N0 fill:#D1C4E9,stroke:#7E57C2
+    style N1 fill:#D1C4E9,stroke:#7E57C2
+    style N2 fill:#E8F0FF,stroke:#A2D0FF
+    style N3 fill:#E8F0FF,stroke:#A2D0FF
+    style N4 fill:#E8F0FF,stroke:#A2D0FF
+    style N5 fill:#E8F0FF,stroke:#A2D0FF
+    style N6 fill:#E8F0FF,stroke:#A2D0FF
+    style N7 fill:#D1C4E9,stroke:#7E57C2
+    style N8 fill:#CFD8DC,stroke:#607D8B
+    style N9 fill:#D1C4E9,stroke:#7E57C2
+    style N10 fill:#D1C4E9,stroke:#7E57C2
+    style N11 fill:#E8F0FF,stroke:#A2D0FF
+    style N12 fill:#D1C4E9,stroke:#7E57C2
+    style N13 fill:#D1C4E9,stroke:#7E57C2
+    style S1 fill:#E8F0FF,stroke:#A2D0FF
+    style S2 fill:#CFD8DC,stroke:#607D8B
+    style M0 fill:#CFD8DC,stroke:#607D8B
+    style M1 fill:#E8F0FF,stroke:#A2D0FF
+    style nest0_0 fill:#D1C4E9,stroke:#7E57C2
+    style nest0_1 fill:#E8F0FF,stroke:#A2D0FF
+    style nest0_2 fill:#E8F0FF,stroke:#A2D0FF
+    style nest0_3 fill:#CFD8DC,stroke:#607D8B
+    style nest1_0 fill:#D1C4E9,stroke:#7E57C2
+    style nest1_1 fill:#D1C4E9,stroke:#7E57C2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_112.txt b/test/mermaid/hard/mermaid_112.txt
new file mode 100644
index 0000000000000000000000000000000000000000..5f5a2641a80fe271e01bbe011a589746412bf61c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_112.txt
@@ -0,0 +1,36 @@
+<Autonomous Vessels, connectedTo, Bunkering>
+<Bunkering, connectedTo, Port Congestion Management>
+<Bunkering, connectedTo, Ship Registry>
+<Digitalization of Shipping, connectedTo, Navigation>
+<Freight Forwarding, connectedTo, Route Planning>
+<Freight Forwarding, connectedTo, Vessel Maintenance>
+<Fuel Consumption Optimization, connectedTo, Marine Research>
+<Fuel Consumption Optimization, partOf, Pollution Control>
+<Green Shipping Initiatives, connectedTo, Ship Design>
+<Green Shipping Initiatives, partOf, Vessel Chartering>
+<Marine Data Analytics, connectedTo, Pilotage>
+<Marine Data Analytics, connectedTo, Subsea Cable Laying>
+<Marine Insurance, connectedTo, Green Shipping Initiatives>
+<Marine Insurance, partOf, Vessel Chartering>
+<Marine Research, connectedTo, Digitalization of Shipping>
+<Marine Research, connectedTo, Vessel Maintenance>
+<Marine Research, fuels, Navigation>
+<Marine Safety Inspection, connectedTo, Autonomous Vessels>
+<Marine Safety Inspection, connectedTo, Marine Data Analytics>
+<Marine Safety Inspection, connectedTo, Port Congestion Management>
+<Maritime Security, connectedTo, Marine Data Analytics>
+<Maritime Security, connectedTo, Marine Safety Inspection>
+<Maritime Security, connectedTo, Port Congestion Management>
+<Navigation, connectedTo, Freight Forwarding>
+<Navigation, connectedTo, Vessel Maintenance>
+<Pilotage, connectedTo, Marine Insurance>
+<Pilotage, partOf, Vessel Chartering>
+<Route Planning, licenses, Vessel Maintenance>
+<Ship Design, connectedTo, Navigation>
+<Ship Design, partOf, Vessel Chartering>
+<Ship Registry, connectedTo, Fuel Consumption Optimization>
+<Ship Registry, partOf, Pollution Control>
+<Subsea Cable Laying, connectedTo, Autonomous Vessels>
+<Vessel Maintenance, connectedTo, Maritime Security>
+<start, connectedTo, Marine Research>
+<start, connectedTo, Navigation>
diff --git a/test/mermaid/hard/mermaid_113.mmd b/test/mermaid/hard/mermaid_113.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..bbfe81ce9ddeb2c2b4859d0712b14318cbf936c7
--- /dev/null
+++ b/test/mermaid/hard/mermaid_113.mmd
@@ -0,0 +1,146 @@
+graph TD
+    N0([start])
+    N1(Autonomous Vessels)
+    N2[/Maritime Security/]
+    N3{Pollution Control}
+    N4[[Cargo Loading]]
+    N5[Marine Safety Inspection]
+    N6[[Hydrographic Surveying]]
+    N7[Salvage Operations]
+    N8[(Green Shipping Initiatives)]
+    N9[[Ship Design]]
+    N10[/Voyage Optimization/]
+    N11[[Marine Research]]
+    N12[Marine Insurance]
+    N13[(Search and Rescue Coordination)]
+    N14{Bunkering}
+    N15[/Customs Clearance/]
+    N16([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Maritime Law Compliance
+        nest0_0[(Freight Forwarding)]
+        nest0_1(Pilotage)
+    end
+    subgraph Ballast Water Management
+        nest1_0[(Subsea Cable Laying)]
+        nest1_1(Vessel Maintenance)
+        nest1_2(Ship_to_Shore Communication)
+        nest1_3([Shipbuilding])
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> |complies| N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> |supplies| N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    N15 --> N16
+    nest0_0 -.-> |operates| nest0_1
+    N10 --> nest0_0
+    nest0_1 -.-> N10
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> nest1_3
+    N15 --> nest1_0
+    nest1_3 -.-> N11
+    N5 -.-> S0
+    S0 --> N14
+    S0 -.-> N16
+    S0 --> N7
+    N7 -.-> S1
+    S1 --> N13
+    S1 --> N15
+    S1 -.-> N14
+    N5 -.-> M0
+    N1 -.-> M0
+    N9 --> M0
+    M0 --> N13
+    N9 --> M1
+    N4 -.-> M1
+    M1 -.-> N13
+    N2 --> M2
+    N0 --> M2
+    M2 --> N5
+    style N0 fill:#D1C4E9,stroke:#673AB7
+    style N1 fill:#D1C4E9,stroke:#673AB7
+    style N2 fill:#D1C4E9,stroke:#673AB7
+    style N3 fill:#FDFCEB,stroke:#EAEFA5
+    style N4 fill:#FDFCEB,stroke:#EAEFA5
+    style N5 fill:#FDFCEB,stroke:#EAEFA5
+    style N6 fill:#FDFCEB,stroke:#EAEFA5
+    style N7 fill:#D1C4E9,stroke:#673AB7
+    style N8 fill:#FDFCEB,stroke:#EAEFA5
+    style N9 fill:#FDFCEB,stroke:#EAEFA5
+    style N10 fill:#D1C4E9,stroke:#673AB7
+    style N11 fill:#FDFCEB,stroke:#EAEFA5
+    style N12 fill:#FDFCEB,stroke:#EAEFA5
+    style N13 fill:#FDFCEB,stroke:#EAEFA5
+    style N14 fill:#D1C4E9,stroke:#673AB7
+    style N15 fill:#FDFCEB,stroke:#EAEFA5
+    style N16 fill:#EBEBEB,stroke:#E0E0E0
+    style S0 fill:#D1C4E9,stroke:#673AB7
+    style S1 fill:#D1C4E9,stroke:#673AB7
+    style M0 fill:#EBEBEB,stroke:#E0E0E0
+    style M1 fill:#EBEBEB,stroke:#E0E0E0
+    style M2 fill:#D1C4E9,stroke:#673AB7
+    style nest0_0 fill:#EBEBEB,stroke:#E0E0E0
+    style nest0_1 fill:#EBEBEB,stroke:#E0E0E0
+    style nest1_0 fill:#EBEBEB,stroke:#E0E0E0
+    style nest1_1 fill:#EBEBEB,stroke:#E0E0E0
+    style nest1_2 fill:#EBEBEB,stroke:#E0E0E0
+    style nest1_3 fill:#FDFCEB,stroke:#EAEFA5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_113.txt b/test/mermaid/hard/mermaid_113.txt
new file mode 100644
index 0000000000000000000000000000000000000000..85e5bb74c0fefd94079adddf4649641a2b806edd
--- /dev/null
+++ b/test/mermaid/hard/mermaid_113.txt
@@ -0,0 +1,42 @@
+<Autonomous Vessels, connectedTo, Maritime Security>
+<Autonomous Vessels, connectedTo, Search and Rescue Coordination>
+<Bunkering, connectedTo, Customs Clearance>
+<Cargo Loading, connectedTo, Marine Safety Inspection>
+<Cargo Loading, connectedTo, Search and Rescue Coordination>
+<Customs Clearance, connectedTo, Subsea Cable Laying>
+<Customs Clearance, connectedTo, end>
+<Freight Forwarding, operates, Pilotage>
+<Freight Forwarding, partOf, Maritime Law Compliance>
+<Green Shipping Initiatives, connectedTo, Ship Design>
+<Hydrographic Surveying, connectedTo, Salvage Operations>
+<Marine Insurance, connectedTo, Search and Rescue Coordination>
+<Marine Research, connectedTo, Marine Insurance>
+<Marine Safety Inspection, complies, Hydrographic Surveying>
+<Marine Safety Inspection, connectedTo, Bunkering>
+<Marine Safety Inspection, connectedTo, Salvage Operations>
+<Marine Safety Inspection, connectedTo, Search and Rescue Coordination>
+<Marine Safety Inspection, connectedTo, end>
+<Maritime Security, connectedTo, Marine Safety Inspection>
+<Maritime Security, connectedTo, Pollution Control>
+<Pilotage, connectedTo, Voyage Optimization>
+<Pilotage, partOf, Maritime Law Compliance>
+<Pollution Control, connectedTo, Cargo Loading>
+<Salvage Operations, connectedTo, Bunkering>
+<Salvage Operations, connectedTo, Customs Clearance>
+<Salvage Operations, connectedTo, Green Shipping Initiatives>
+<Salvage Operations, connectedTo, Search and Rescue Coordination>
+<Search and Rescue Coordination, connectedTo, Bunkering>
+<Ship Design, connectedTo, Search and Rescue Coordination>
+<Ship Design, supplies, Voyage Optimization>
+<Ship_to_Shore Communication, connectedTo, Shipbuilding>
+<Ship_to_Shore Communication, partOf, Ballast Water Management>
+<Shipbuilding, connectedTo, Marine Research>
+<Shipbuilding, partOf, Ballast Water Management>
+<Subsea Cable Laying, connectedTo, Vessel Maintenance>
+<Subsea Cable Laying, partOf, Ballast Water Management>
+<Vessel Maintenance, connectedTo, Ship_to_Shore Communication>
+<Vessel Maintenance, partOf, Ballast Water Management>
+<Voyage Optimization, connectedTo, Freight Forwarding>
+<Voyage Optimization, connectedTo, Marine Research>
+<start, connectedTo, Autonomous Vessels>
+<start, connectedTo, Marine Safety Inspection>
diff --git a/test/mermaid/hard/mermaid_114.mmd b/test/mermaid/hard/mermaid_114.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..28f7e0a635f4dcebacdf1b3b4edd3fe86efeaf1a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_114.mmd
@@ -0,0 +1,128 @@
+graph TD
+    N0([Digitalization of Shipping])
+    N1[(Green Shipping Initiatives)]
+    N2(Pollution Control)
+    N3[Marine Safety Inspection]
+    N4[Cargo Loading]
+    N5[/Offshore Operations/]
+    N6(Fisheries Management)
+    N7[(Vessel Chartering)]
+    N8[Salvage Operations]
+    N9(Route Planning)
+    N10(Vessel Maintenance)
+    N11[Autonomous Vessels]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Pilotage
+        nest0_0[(Voyage Optimization)]
+        nest0_1[[Container Tracking]]
+        nest0_2(Port Congestion Management)
+    end
+    subgraph Port Operations
+        nest1_0{Marine Insurance}
+        nest1_1[Crew Management]
+        nest1_2[[Subsea Cable Laying]]
+    end
+    N0 --> |analyzes| N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N3 -.-> nest0_0
+    nest0_2 --> N6
+    nest1_0 -.-> nest1_1
+    nest1_1 --> |supplies| nest1_2
+    N4 --> nest1_0
+    nest1_2 -.-> N2
+    N2 --> S0
+    S0 -.-> N8
+    S0 --> N4
+    S0 -.-> N5
+    S0 --> N11
+    N4 -.-> S1
+    S1 --> N11
+    S1 -.-> N8
+    N8 -.-> S2
+    S2 --> N11
+    S2 --> N10
+    N1 --> M0
+    N3 -.-> M0
+    N0 -.-> M0
+    M0 -.-> N5
+    N3 --> M1
+    N1 -.-> M1
+    N5 --> M1
+    M1 -.-> N8
+    style N0 fill:#DACBE3,stroke:#A188D0
+    style N1 fill:#DACBE3,stroke:#A188D0
+    style N2 fill:#DACBE3,stroke:#A188D0
+    style N3 fill:#C9EFEC,stroke:#6FE1D5
+    style N4 fill:#DACBE3,stroke:#A188D0
+    style N5 fill:#DACBE3,stroke:#A188D0
+    style N6 fill:#DACBE3,stroke:#A188D0
+    style N7 fill:#C9EFEC,stroke:#6FE1D5
+    style N8 fill:#DACBE3,stroke:#A188D0
+    style N9 fill:#DACBE3,stroke:#A188D0
+    style N10 fill:#D0E0F8,stroke:#4285F4
+    style N11 fill:#DACBE3,stroke:#A188D0
+    style S0 fill:#DACBE3,stroke:#A188D0
+    style S1 fill:#D0E0F8,stroke:#4285F4
+    style S2 fill:#D0E0F8,stroke:#4285F4
+    style M0 fill:#D0E0F8,stroke:#4285F4
+    style M1 fill:#C9EFEC,stroke:#6FE1D5
+    style nest0_0 fill:#C9EFEC,stroke:#6FE1D5
+    style nest0_1 fill:#DACBE3,stroke:#A188D0
+    style nest0_2 fill:#D0E0F8,stroke:#4285F4
+    style nest1_0 fill:#C9EFEC,stroke:#6FE1D5
+    style nest1_1 fill:#C9EFEC,stroke:#6FE1D5
+    style nest1_2 fill:#DACBE3,stroke:#A188D0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#4285F4,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_115.mmd b/test/mermaid/hard/mermaid_115.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..c9756312f5467a6bb9a50ed3017a689ce9d6e8c6
--- /dev/null
+++ b/test/mermaid/hard/mermaid_115.mmd
@@ -0,0 +1,128 @@
+graph RL
+    N0([Space Tourism Development])
+    N1[/Satellite Deployment/]
+    N2(Scientific Data Analysis)
+    N3[[Extravehicular Activity Planning]]
+    N4[(Spacecraft Control)]
+    N5(Propellant Management)
+    N6{Mission Design}
+    N7(Robotics for Space Exploration)
+    N8[(Microgravity Experiments)]
+    N9[Autonomous Rendezvous and Docking]
+    N10{Planetary Science Research}
+    N11{Telemetry Monitoring}
+    N12([Space Station Operations])
+    N13[[International Collaboration]]
+    N14[[Ground Station Operations]]
+    N15([Mission Control Center Management])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph In_Situ Resource Utilization
+        nest0_0[[Re_entry Vehicle Design]]
+        nest0_1(Exoplanet Discovery)
+    end
+    subgraph Rocket Propulsion Development
+        nest1_0[Astronaut Training]
+        nest1_1[/Space Weather Forecasting/]
+        nest1_2(Astrophysics Research)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    nest0_0 --> nest0_1
+    N11 --> nest0_0
+    nest0_1 -.-> N1
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N5 --> nest1_0
+    nest1_2 -.-> N4
+    N11 -.-> S0
+    S0 -.-> N13
+    S0 -.-> N15
+    N4 -.-> S1
+    S1 -.-> N9
+    S1 --> |licenses| N7
+    N2 --> M0
+    N10 -.-> M0
+    N3 -.-> M0
+    M0 --> N12
+    N5 --> M2
+    N2 --> M2
+    N1 -.-> M2
+    M2 --> N9
+    style N0 fill:#FFF9C4,stroke:#FFEB3B
+    style N1 fill:#EDE7F6,stroke:#9575CD
+    style N2 fill:#EDE7F6,stroke:#9575CD
+    style N3 fill:#E0F2F1,stroke:#4DB6AC
+    style N4 fill:#EDE7F6,stroke:#9575CD
+    style N5 fill:#E0F2F1,stroke:#4DB6AC
+    style N6 fill:#EDE7F6,stroke:#9575CD
+    style N7 fill:#FFF9C4,stroke:#FFEB3B
+    style N8 fill:#FFF9C4,stroke:#FFEB3B
+    style N9 fill:#EDE7F6,stroke:#9575CD
+    style N10 fill:#FFF9C4,stroke:#FFEB3B
+    style N11 fill:#E0F2F1,stroke:#4DB6AC
+    style N12 fill:#FFF9C4,stroke:#FFEB3B
+    style N13 fill:#E0F2F1,stroke:#4DB6AC
+    style N14 fill:#EDE7F6,stroke:#9575CD
+    style N15 fill:#E0F2F1,stroke:#4DB6AC
+    style S0 fill:#E0F2F1,stroke:#4DB6AC
+    style S1 fill:#EDE7F6,stroke:#9575CD
+    style M0 fill:#FFF9C4,stroke:#FFEB3B
+    style M2 fill:#EDE7F6,stroke:#9575CD
+    style nest0_0 fill:#FFF9C4,stroke:#FFEB3B
+    style nest0_1 fill:#E0F2F1,stroke:#4DB6AC
+    style nest1_0 fill:#FFF9C4,stroke:#FFEB3B
+    style nest1_1 fill:#E0F2F1,stroke:#4DB6AC
+    style nest1_2 fill:#FFF9C4,stroke:#FFEB3B
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFEB3B,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_115.txt b/test/mermaid/hard/mermaid_115.txt
new file mode 100644
index 0000000000000000000000000000000000000000..892e3f933dc4992bc263707210b3cedfc113ea53
--- /dev/null
+++ b/test/mermaid/hard/mermaid_115.txt
@@ -0,0 +1,37 @@
+<Astronaut Training, connectedTo, Space Weather Forecasting>
+<Astronaut Training, partOf, Rocket Propulsion Development>
+<Astrophysics Research, connectedTo, Spacecraft Control>
+<Astrophysics Research, partOf, Rocket Propulsion Development>
+<Autonomous Rendezvous and Docking, connectedTo, Planetary Science Research>
+<Exoplanet Discovery, connectedTo, Satellite Deployment>
+<Exoplanet Discovery, partOf, In_Situ Resource Utilization>
+<Extravehicular Activity Planning, connectedTo, Space Station Operations>
+<Extravehicular Activity Planning, connectedTo, Spacecraft Control>
+<Ground Station Operations, connectedTo, Mission Control Center Management>
+<International Collaboration, connectedTo, Ground Station Operations>
+<Microgravity Experiments, connectedTo, Autonomous Rendezvous and Docking>
+<Mission Design, connectedTo, Robotics for Space Exploration>
+<Planetary Science Research, connectedTo, Space Station Operations>
+<Planetary Science Research, connectedTo, Telemetry Monitoring>
+<Propellant Management, connectedTo, Astronaut Training>
+<Propellant Management, connectedTo, Autonomous Rendezvous and Docking>
+<Propellant Management, connectedTo, Mission Design>
+<Re_entry Vehicle Design, connectedTo, Exoplanet Discovery>
+<Re_entry Vehicle Design, partOf, In_Situ Resource Utilization>
+<Robotics for Space Exploration, connectedTo, Microgravity Experiments>
+<Satellite Deployment, connectedTo, Autonomous Rendezvous and Docking>
+<Satellite Deployment, connectedTo, Scientific Data Analysis>
+<Scientific Data Analysis, connectedTo, Autonomous Rendezvous and Docking>
+<Scientific Data Analysis, connectedTo, Extravehicular Activity Planning>
+<Scientific Data Analysis, connectedTo, Space Station Operations>
+<Space Station Operations, connectedTo, International Collaboration>
+<Space Tourism Development, connectedTo, Satellite Deployment>
+<Space Weather Forecasting, connectedTo, Astrophysics Research>
+<Space Weather Forecasting, partOf, Rocket Propulsion Development>
+<Spacecraft Control, connectedTo, Autonomous Rendezvous and Docking>
+<Spacecraft Control, connectedTo, Propellant Management>
+<Spacecraft Control, licenses, Robotics for Space Exploration>
+<Telemetry Monitoring, connectedTo, International Collaboration>
+<Telemetry Monitoring, connectedTo, Mission Control Center Management>
+<Telemetry Monitoring, connectedTo, Re_entry Vehicle Design>
+<Telemetry Monitoring, connectedTo, Space Station Operations>
diff --git a/test/mermaid/hard/mermaid_116.txt b/test/mermaid/hard/mermaid_116.txt
new file mode 100644
index 0000000000000000000000000000000000000000..fc96ca232ef3f0606df8251a93927ce030997377
--- /dev/null
+++ b/test/mermaid/hard/mermaid_116.txt
@@ -0,0 +1,46 @@
+<Astrophysics Research, connectedTo, In_Situ Resource Utilization>
+<Autonomous Rendezvous and Docking, connectedTo, Exoplanet Discovery>
+<Commercial Space Flight Regulation, connectedTo, New Space Technology Development>
+<Commercial Space Flight Regulation, connectedTo, Space Tourism Development>
+<Commercial Space Flight Regulation, tests, Mission Design>
+<Exoplanet Discovery, connectedTo, Launch Operations>
+<Exoplanet Discovery, connectedTo, Re_entry Vehicle Design>
+<Extravehicular Activity Planning, connectedTo, New Space Technology Development>
+<Extravehicular Activity Planning, partOf, Scientific Data Analysis>
+<In_Situ Resource Utilization, connectedTo, Autonomous Rendezvous and Docking>
+<In_Situ Resource Utilization, connectedTo, Space Weather Forecasting>
+<International Collaboration, designs, end>
+<International Collaboration, partOf, Mission Control Center Management>
+<Interplanetary Trajectory Calculation, connectedTo, Mission Design>
+<Interplanetary Trajectory Calculation, connectedTo, New Space Technology Development>
+<Interplanetary Trajectory Calculation, connectedTo, Telemetry Monitoring>
+<Launch Operations, connectedTo, Lunar Exploration>
+<Launch Operations, partOf, Scientific Data Analysis>
+<Life Support Systems, connectedTo, Extravehicular Activity Planning>
+<Life Support Systems, partOf, Scientific Data Analysis>
+<Lunar Exploration, connectedTo, Life Support Systems>
+<Lunar Exploration, partOf, Scientific Data Analysis>
+<Microgravity Experiments, connectedTo, Robotics for Space Exploration>
+<Mission Design, connectedTo, Microgravity Experiments>
+<Mission Design, connectedTo, New Space Technology Development>
+<Mission Design, connectedTo, Propellant Management>
+<New Space Technology Development, collects, Rocket Propulsion Development>
+<New Space Technology Development, connectedTo, Astrophysics Research>
+<New Space Technology Development, connectedTo, In_Situ Resource Utilization>
+<Payload Development, connectedTo, Interplanetary Trajectory Calculation>
+<Payload Development, coordinates, Propellant Management>
+<Planetary Science Research, connectedTo, Payload Development>
+<Propellant Management, connectedTo, New Space Technology Development>
+<Re_entry Vehicle Design, connectedTo, end>
+<Robotics for Space Exploration, simulates, Propellant Management>
+<Rocket Propulsion Development, connectedTo, Astrophysics Research>
+<Space Tourism Development, connectedTo, In_Situ Resource Utilization>
+<Space Tourism Development, connectedTo, Mission Design>
+<Space Tourism Development, connectedTo, New Space Technology Development>
+<Space Tourism Development, connectedTo, Propellant Management>
+<Space Tourism Development, connectedTo, Rocket Propulsion Development>
+<Space Weather Forecasting, connectedTo, International Collaboration>
+<Space Weather Forecasting, partOf, Mission Control Center Management>
+<Telemetry Monitoring, connectedTo, Commercial Space Flight Regulation>
+<start, connectedTo, Mission Design>
+<start, connectedTo, Planetary Science Research>
diff --git a/test/mermaid/hard/mermaid_117.txt b/test/mermaid/hard/mermaid_117.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7519f32284c8b216781b4e742cd070f4fe60f008
--- /dev/null
+++ b/test/mermaid/hard/mermaid_117.txt
@@ -0,0 +1,34 @@
+<Exoplanet Discovery, connectedTo, Sample Return Missions>
+<Exoplanet Discovery, connectedTo, Space Tourism Development>
+<Exoplanet Discovery, connectedTo, Telemetry Monitoring>
+<Extravehicular Activity Planning, connectedTo, Space Weather Forecasting>
+<Extravehicular Activity Planning, partOf, Propellant Management>
+<Ground Station Operations, connectedTo, Satellite Deployment>
+<Ground Station Operations, partOf, Autonomous Rendezvous and Docking>
+<Interplanetary Trajectory Calculation, connectedTo, Spacecraft Control>
+<Interplanetary Trajectory Calculation, partOf, Autonomous Rendezvous and Docking>
+<Lunar Exploration, connectedTo, Extravehicular Activity Planning>
+<Lunar Exploration, partOf, Propellant Management>
+<Microgravity Experiments, connectedTo, Commercial Space Flight Regulation>
+<Mission Design, connectedTo, Microgravity Experiments>
+<Mission Design, connectedTo, Space Weather Forecasting>
+<New Space Technology Development, connectedTo, Exoplanet Discovery>
+<New Space Technology Development, develops, Telemetry Monitoring>
+<Payload Development, connectedTo, Satellite Deployment>
+<Payload Development, receives, Microgravity Experiments>
+<Sample Return Missions, connectedTo, Lunar Exploration>
+<Sample Return Missions, partOf, Propellant Management>
+<Satellite Deployment, connectedTo, Microgravity Experiments>
+<Space Tourism Development, advocates, Payload Development>
+<Space Tourism Development, connectedTo, Payload Development>
+<Space Tourism Development, connectedTo, Space Weather Forecasting>
+<Space Tourism Development, connectedTo, Telemetry Monitoring>
+<Space Tourism Development, designs, Microgravity Experiments>
+<Space Weather Forecasting, connectedTo, Payload Development>
+<Space Weather Forecasting, transmits, Interplanetary Trajectory Calculation>
+<Spacecraft Control, connectedTo, Ground Station Operations>
+<Spacecraft Control, partOf, Autonomous Rendezvous and Docking>
+<Telemetry Monitoring, connectedTo, Microgravity Experiments>
+<Telemetry Monitoring, connectedTo, Mission Design>
+<start, connectedTo, New Space Technology Development>
+<start, connectedTo, Telemetry Monitoring>
diff --git a/test/mermaid/hard/mermaid_118.mmd b/test/mermaid/hard/mermaid_118.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..6aab59ff827209ec07fa926efec6023c90b8d655
--- /dev/null
+++ b/test/mermaid/hard/mermaid_118.mmd
@@ -0,0 +1,156 @@
+graph RL
+    N0([Carbon Cycle Research])
+    N1[Ocean Current Analysis]
+    N2{Public Engagement on Climate}
+    N3(Drought Monitoring and Forecasting)
+    N4{Cloud Formation Research}
+    N5[Aerosol Impact Assessment]
+    N6[(Environmental Justice Study)]
+    N7([Satellite Data Interpretation])
+    N8[/Solar Radiation Management Research/]
+    N9([Climate Policy Analysis])
+    N10(Green Technology Incubation)
+    N11[[Carbon Sequestration Technologies]]
+    N12{Climate Education Programs}
+    N13[Extreme Weather Event Analysis]
+    N14[(Ecological Footprint Calculation)]
+    N15[Greenhouse Gas Measurement]
+    N16([Adaptation Strategy Development])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Mitigation Technology Evaluation
+        nest0_0[[Permafrost Thaw Assessment]]
+        nest0_1(Paleoclimate Reconstruction)
+        nest0_2[(Sea Level Rise Projection)]
+        nest0_3[(Indigenous Knowledge Integration)]
+    end
+    subgraph Climate Resilient Agriculture
+        nest1_0([Data Collection])
+        nest1_1[International Climate Negotiation]
+    end
+    N0 -.-> N1
+    N1 -.-> |visualizes| N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> |vulnerabilities| N9
+    N9 -.-> |communicates| N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 --> N14
+    N14 --> N15
+    N15 -.-> N16
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> |influences| nest0_3
+    N8 --> nest0_0
+    nest0_3 --> N11
+    nest1_0 --> nest1_1
+    N9 --> nest1_0
+    nest1_1 -.-> N11
+    N12 -.-> S0
+    S0 --> N16
+    S0 -.-> N14
+    S0 -.-> N15
+    N7 --> S1
+    S1 --> N13
+    S1 -.-> N11
+    S1 -.-> |scenarios| N10
+    S1 --> |detects| N9
+    N8 --> S2
+    S2 --> N16
+    S2 -.-> N13
+    S2 -.-> N15
+    S2 -.-> N14
+    N5 --> M0
+    N2 --> |impacts| M0
+    N6 --> |governs| M0
+    N0 --> M0
+    M0 --> N8
+    N0 -.-> M1
+    N1 --> M1
+    N4 --> M1
+    M1 -.-> N6
+    style N0 fill:#D1C4E9,stroke:#7E57C2
+    style N1 fill:#B2EBF2,stroke:#00BCD4
+    style N2 fill:#C9F0F0,stroke:#4DD0E1
+    style N3 fill:#C9F0F0,stroke:#4DD0E1
+    style N4 fill:#B2EBF2,stroke:#00BCD4
+    style N5 fill:#B2EBF2,stroke:#00BCD4
+    style N6 fill:#D1C4E9,stroke:#7E57C2
+    style N7 fill:#B2EBF2,stroke:#00BCD4
+    style N8 fill:#D1C4E9,stroke:#7E57C2
+    style N9 fill:#C9F0F0,stroke:#4DD0E1
+    style N10 fill:#C9F0F0,stroke:#4DD0E1
+    style N11 fill:#B2EBF2,stroke:#00BCD4
+    style N12 fill:#B2EBF2,stroke:#00BCD4
+    style N13 fill:#C9F0F0,stroke:#4DD0E1
+    style N14 fill:#D1C4E9,stroke:#7E57C2
+    style N15 fill:#D1C4E9,stroke:#7E57C2
+    style N16 fill:#D1C4E9,stroke:#7E57C2
+    style S0 fill:#D1C4E9,stroke:#7E57C2
+    style S1 fill:#D1C4E9,stroke:#7E57C2
+    style S2 fill:#C9F0F0,stroke:#4DD0E1
+    style M0 fill:#C9F0F0,stroke:#4DD0E1
+    style M1 fill:#C9F0F0,stroke:#4DD0E1
+    style nest0_0 fill:#B2EBF2,stroke:#00BCD4
+    style nest0_1 fill:#C9F0F0,stroke:#4DD0E1
+    style nest0_2 fill:#B2EBF2,stroke:#00BCD4
+    style nest0_3 fill:#B2EBF2,stroke:#00BCD4
+    style nest1_0 fill:#D1C4E9,stroke:#7E57C2
+    style nest1_1 fill:#D1C4E9,stroke:#7E57C2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 44 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 45 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 46 stroke:#00BCD4,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_118.txt b/test/mermaid/hard/mermaid_118.txt
new file mode 100644
index 0000000000000000000000000000000000000000..56a36ec1959571cf9585421145cbb7d3b59a1aba
--- /dev/null
+++ b/test/mermaid/hard/mermaid_118.txt
@@ -0,0 +1,48 @@
+<Aerosol Impact Assessment, connectedTo, Environmental Justice Study>
+<Aerosol Impact Assessment, connectedTo, Solar Radiation Management Research>
+<Carbon Cycle Research, connectedTo, Environmental Justice Study>
+<Carbon Cycle Research, connectedTo, Ocean Current Analysis>
+<Carbon Cycle Research, connectedTo, Solar Radiation Management Research>
+<Carbon Sequestration Technologies, connectedTo, Climate Education Programs>
+<Climate Education Programs, connectedTo, Adaptation Strategy Development>
+<Climate Education Programs, connectedTo, Ecological Footprint Calculation>
+<Climate Education Programs, connectedTo, Extreme Weather Event Analysis>
+<Climate Education Programs, connectedTo, Greenhouse Gas Measurement>
+<Climate Policy Analysis, communicates, Green Technology Incubation>
+<Climate Policy Analysis, connectedTo, Data Collection>
+<Cloud Formation Research, connectedTo, Aerosol Impact Assessment>
+<Cloud Formation Research, connectedTo, Environmental Justice Study>
+<Data Collection, connectedTo, International Climate Negotiation>
+<Data Collection, partOf, Climate Resilient Agriculture>
+<Drought Monitoring and Forecasting, connectedTo, Cloud Formation Research>
+<Ecological Footprint Calculation, connectedTo, Greenhouse Gas Measurement>
+<Environmental Justice Study, connectedTo, Satellite Data Interpretation>
+<Environmental Justice Study, governs, Solar Radiation Management Research>
+<Extreme Weather Event Analysis, connectedTo, Ecological Footprint Calculation>
+<Green Technology Incubation, connectedTo, Carbon Sequestration Technologies>
+<Greenhouse Gas Measurement, connectedTo, Adaptation Strategy Development>
+<Indigenous Knowledge Integration, connectedTo, Carbon Sequestration Technologies>
+<Indigenous Knowledge Integration, partOf, Mitigation Technology Evaluation>
+<International Climate Negotiation, connectedTo, Carbon Sequestration Technologies>
+<International Climate Negotiation, partOf, Climate Resilient Agriculture>
+<Ocean Current Analysis, connectedTo, Environmental Justice Study>
+<Ocean Current Analysis, visualizes, Public Engagement on Climate>
+<Paleoclimate Reconstruction, connectedTo, Sea Level Rise Projection>
+<Paleoclimate Reconstruction, partOf, Mitigation Technology Evaluation>
+<Permafrost Thaw Assessment, connectedTo, Paleoclimate Reconstruction>
+<Permafrost Thaw Assessment, partOf, Mitigation Technology Evaluation>
+<Public Engagement on Climate, connectedTo, Drought Monitoring and Forecasting>
+<Public Engagement on Climate, impacts, Solar Radiation Management Research>
+<Satellite Data Interpretation, connectedTo, Carbon Sequestration Technologies>
+<Satellite Data Interpretation, connectedTo, Extreme Weather Event Analysis>
+<Satellite Data Interpretation, connectedTo, Solar Radiation Management Research>
+<Satellite Data Interpretation, detects, Climate Policy Analysis>
+<Satellite Data Interpretation, scenarios, Green Technology Incubation>
+<Sea Level Rise Projection, influences, Indigenous Knowledge Integration>
+<Sea Level Rise Projection, partOf, Mitigation Technology Evaluation>
+<Solar Radiation Management Research, connectedTo, Adaptation Strategy Development>
+<Solar Radiation Management Research, connectedTo, Ecological Footprint Calculation>
+<Solar Radiation Management Research, connectedTo, Extreme Weather Event Analysis>
+<Solar Radiation Management Research, connectedTo, Greenhouse Gas Measurement>
+<Solar Radiation Management Research, connectedTo, Permafrost Thaw Assessment>
+<Solar Radiation Management Research, vulnerabilities, Climate Policy Analysis>
diff --git a/test/mermaid/hard/mermaid_119.mmd b/test/mermaid/hard/mermaid_119.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..bd9beb60ea000918c4c1d3dbdddfd4219cb0ca8a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_119.mmd
@@ -0,0 +1,132 @@
+graph LR
+    N0([start])
+    N1{Solar Radiation Management Research}
+    N2[(Climate Change Vulnerability Assessment)]
+    N3[[Data Collection]]
+    N4[Climate Impact Assessment]
+    N5[/International Climate Negotiation/]
+    N6([Environmental Justice Study])
+    N7[Remote Sensing for Climate]
+    N8[Atmospheric Monitoring]
+    N9[[Drought Monitoring and Forecasting]]
+    N10(Water Resource Management under Climate Change)
+    N11([Climate Policy Analysis])
+    N12(Aerosol Impact Assessment)
+    N13(Adaptation Strategy Development)
+    N14[Greenhouse Gas Measurement]
+    N15[(Glacier Mass Balance Monitoring)]
+    N16(Climate Modeling)
+    N17([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Ecosystem Response Modeling
+        nest0_0(Carbon Cycle Research)
+        nest0_1[(Permafrost Thaw Assessment)]
+        nest0_2([Extreme Weather Event Analysis])
+        nest0_3[/Cloud Formation Research/]
+    end
+    subgraph Arctic and Antarctic Research
+        nest1_0([Flood Risk Assessment])
+        nest1_1[(Mitigation Technology Evaluation)]
+        nest1_2{Green Technology Incubation}
+        nest1_3[[Ocean Current Analysis]]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> |no| N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    N15 --> N16
+    N16 -.-> N17
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N14 --> nest0_0
+    nest0_3 --> N10
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N13 -.-> |yes| nest1_0
+    nest1_3 -.-> |no| N14
+    N8 -.-> S0
+    S0 --> N13
+    S0 -.-> N11
+    S0 --> N10
+    S0 --> |yes| N15
+    N6 -.-> S1
+    S1 --> N15
+    S1 -.-> N10
+    S1 -.-> N13
+    S1 --> N11
+    N2 -.-> M0
+    N1 --> M0
+    N3 --> M0
+    N4 -.-> M0
+    M0 --> N6
+    N0 -.-> M1
+    N1 --> M1
+    N2 --> M1
+    M1 -.-> N5
+    style S0 fill:#FFFDE0,stroke:#FFF8A6
+    style S1 fill:#D6D9F0,stroke:#9FA9E1
+    style M0 fill:#FFF3E0,stroke:#FFB74D
+    style M1 fill:#FFF3E0,stroke:#FFB74D
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 44 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 45 stroke:#FFF8A6,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_119.txt b/test/mermaid/hard/mermaid_119.txt
new file mode 100644
index 0000000000000000000000000000000000000000..472885f017d0bb499402b823696dc49b484cb2cf
--- /dev/null
+++ b/test/mermaid/hard/mermaid_119.txt
@@ -0,0 +1,50 @@
+<Adaptation Strategy Development, connectedTo, Greenhouse Gas Measurement>
+<Adaptation Strategy Development, yes, Flood Risk Assessment>
+<Aerosol Impact Assessment, connectedTo, Adaptation Strategy Development>
+<Atmospheric Monitoring, connectedTo, Adaptation Strategy Development>
+<Atmospheric Monitoring, connectedTo, Climate Policy Analysis>
+<Atmospheric Monitoring, connectedTo, Drought Monitoring and Forecasting>
+<Atmospheric Monitoring, connectedTo, Water Resource Management under Climate Change>
+<Atmospheric Monitoring, yes, Glacier Mass Balance Monitoring>
+<Carbon Cycle Research, connectedTo, Permafrost Thaw Assessment>
+<Carbon Cycle Research, partOf, Ecosystem Response Modeling>
+<Climate Change Vulnerability Assessment, connectedTo, Data Collection>
+<Climate Change Vulnerability Assessment, connectedTo, Environmental Justice Study>
+<Climate Change Vulnerability Assessment, connectedTo, International Climate Negotiation>
+<Climate Impact Assessment, connectedTo, Environmental Justice Study>
+<Climate Impact Assessment, connectedTo, International Climate Negotiation>
+<Climate Modeling, connectedTo, end>
+<Climate Policy Analysis, connectedTo, Aerosol Impact Assessment>
+<Cloud Formation Research, connectedTo, Water Resource Management under Climate Change>
+<Cloud Formation Research, partOf, Ecosystem Response Modeling>
+<Data Collection, connectedTo, Climate Impact Assessment>
+<Data Collection, connectedTo, Environmental Justice Study>
+<Drought Monitoring and Forecasting, connectedTo, Water Resource Management under Climate Change>
+<Environmental Justice Study, connectedTo, Adaptation Strategy Development>
+<Environmental Justice Study, connectedTo, Climate Policy Analysis>
+<Environmental Justice Study, connectedTo, Glacier Mass Balance Monitoring>
+<Environmental Justice Study, connectedTo, Remote Sensing for Climate>
+<Environmental Justice Study, connectedTo, Water Resource Management under Climate Change>
+<Extreme Weather Event Analysis, connectedTo, Cloud Formation Research>
+<Extreme Weather Event Analysis, partOf, Ecosystem Response Modeling>
+<Flood Risk Assessment, connectedTo, Mitigation Technology Evaluation>
+<Flood Risk Assessment, partOf, Arctic and Antarctic Research>
+<Glacier Mass Balance Monitoring, connectedTo, Climate Modeling>
+<Green Technology Incubation, connectedTo, Ocean Current Analysis>
+<Green Technology Incubation, partOf, Arctic and Antarctic Research>
+<Greenhouse Gas Measurement, connectedTo, Carbon Cycle Research>
+<Greenhouse Gas Measurement, connectedTo, Glacier Mass Balance Monitoring>
+<International Climate Negotiation, no, Environmental Justice Study>
+<Mitigation Technology Evaluation, connectedTo, Green Technology Incubation>
+<Mitigation Technology Evaluation, partOf, Arctic and Antarctic Research>
+<Ocean Current Analysis, no, Greenhouse Gas Measurement>
+<Ocean Current Analysis, partOf, Arctic and Antarctic Research>
+<Permafrost Thaw Assessment, connectedTo, Extreme Weather Event Analysis>
+<Permafrost Thaw Assessment, partOf, Ecosystem Response Modeling>
+<Remote Sensing for Climate, connectedTo, Atmospheric Monitoring>
+<Solar Radiation Management Research, connectedTo, Climate Change Vulnerability Assessment>
+<Solar Radiation Management Research, connectedTo, Environmental Justice Study>
+<Solar Radiation Management Research, connectedTo, International Climate Negotiation>
+<Water Resource Management under Climate Change, connectedTo, Climate Policy Analysis>
+<start, connectedTo, International Climate Negotiation>
+<start, connectedTo, Solar Radiation Management Research>
diff --git a/test/mermaid/hard/mermaid_12.mmd b/test/mermaid/hard/mermaid_12.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..97be7b86adef827310fc9e67e1fe3f10bb48dfca
--- /dev/null
+++ b/test/mermaid/hard/mermaid_12.mmd
@@ -0,0 +1,120 @@
+graph RL
+    N0([start])
+    N1{Alumni Network Management}
+    N2[Research Grant Application]
+    N3{Digital Resource Management}
+    N4(Counseling Session)
+    N5(Document Verification)
+    N6{Attendance Tracking}
+    N7[Club Registration]
+    N8[[Parent_Teacher Conference]]
+    N9(Course Material Preparation)
+    N10[/Lecture Delivery/]
+    N11[[Assignment Submission]]
+    N12[Student Application]
+    N13[Grade Entry]
+    N14{Result Declaration}
+    N15([Course Selection])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    subgraph Internship Coordination
+        nest0_0([Special Education Support])
+        nest0_1[Faculty Recruitment]
+    end
+    subgraph Extracurricular Activity
+        nest1_0[Graduation Approval]
+        nest1_1{Student Feedback Collection}
+        nest1_2[Advisory Committee Meeting]
+    end
+    N0 -.-> |integrates| N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 --> N14
+    N14 -.-> N15
+    nest0_0 --> |recruits| nest0_1
+    N7 --> nest0_0
+    nest0_1 --> N2
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N3 --> nest1_0
+    nest1_2 --> N1
+    N5 -.-> S0
+    S0 -.-> |teaches| N10
+    S0 -.-> |enrolls| N14
+    S0 -.-> N7
+    N10 -.-> S1
+    S1 --> N14
+    S1 -.-> N12
+    S1 -.-> N13
+    N5 --> S2
+    S2 --> N12
+    S2 --> N14
+    style N0 fill:#FDFCEB,stroke:#EAEFA5
+    style N1 fill:#FFFDE7,stroke:#FFF176
+    style N2 fill:#C9F0F0,stroke:#4DD0E1
+    style N3 fill:#FDFCEB,stroke:#EAEFA5
+    style N4 fill:#FDFCEB,stroke:#EAEFA5
+    style N5 fill:#FDFCEB,stroke:#EAEFA5
+    style N6 fill:#FFFDE7,stroke:#FFF176
+    style N7 fill:#FFFDE7,stroke:#FFF176
+    style N8 fill:#C9F0F0,stroke:#4DD0E1
+    style N9 fill:#FDFCEB,stroke:#EAEFA5
+    style N10 fill:#FDFCEB,stroke:#EAEFA5
+    style N11 fill:#FFFDE7,stroke:#FFF176
+    style N12 fill:#C9F0F0,stroke:#4DD0E1
+    style N13 fill:#FDFCEB,stroke:#EAEFA5
+    style N14 fill:#FDFCEB,stroke:#EAEFA5
+    style N15 fill:#FDFCEB,stroke:#EAEFA5
+    style S0 fill:#C9F0F0,stroke:#4DD0E1
+    style S1 fill:#FFFDE7,stroke:#FFF176
+    style S2 fill:#C9F0F0,stroke:#4DD0E1
+    style nest0_0 fill:#FDFCEB,stroke:#EAEFA5
+    style nest0_1 fill:#C9F0F0,stroke:#4DD0E1
+    style nest1_0 fill:#C9F0F0,stroke:#4DD0E1
+    style nest1_1 fill:#C9F0F0,stroke:#4DD0E1
+    style nest1_2 fill:#FDFCEB,stroke:#EAEFA5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#4DD0E1,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_12.txt b/test/mermaid/hard/mermaid_12.txt
new file mode 100644
index 0000000000000000000000000000000000000000..dc652dc3911d7cd6e0598ef7ab43bce93788d537
--- /dev/null
+++ b/test/mermaid/hard/mermaid_12.txt
@@ -0,0 +1,35 @@
+<Advisory Committee Meeting, connectedTo, Alumni Network Management>
+<Advisory Committee Meeting, partOf, Extracurricular Activity>
+<Alumni Network Management, connectedTo, Research Grant Application>
+<Assignment Submission, connectedTo, Student Application>
+<Attendance Tracking, connectedTo, Club Registration>
+<Club Registration, connectedTo, Parent_Teacher Conference>
+<Club Registration, connectedTo, Special Education Support>
+<Counseling Session, connectedTo, Document Verification>
+<Course Material Preparation, connectedTo, Lecture Delivery>
+<Digital Resource Management, connectedTo, Counseling Session>
+<Digital Resource Management, connectedTo, Graduation Approval>
+<Document Verification, connectedTo, Attendance Tracking>
+<Document Verification, connectedTo, Club Registration>
+<Document Verification, connectedTo, Result Declaration>
+<Document Verification, connectedTo, Student Application>
+<Document Verification, enrolls, Result Declaration>
+<Document Verification, teaches, Lecture Delivery>
+<Faculty Recruitment, connectedTo, Research Grant Application>
+<Faculty Recruitment, partOf, Internship Coordination>
+<Grade Entry, connectedTo, Result Declaration>
+<Graduation Approval, connectedTo, Student Feedback Collection>
+<Graduation Approval, partOf, Extracurricular Activity>
+<Lecture Delivery, connectedTo, Assignment Submission>
+<Lecture Delivery, connectedTo, Grade Entry>
+<Lecture Delivery, connectedTo, Result Declaration>
+<Lecture Delivery, connectedTo, Student Application>
+<Parent_Teacher Conference, connectedTo, Course Material Preparation>
+<Research Grant Application, connectedTo, Digital Resource Management>
+<Result Declaration, connectedTo, Course Selection>
+<Special Education Support, partOf, Internship Coordination>
+<Special Education Support, recruits, Faculty Recruitment>
+<Student Application, connectedTo, Grade Entry>
+<Student Feedback Collection, connectedTo, Advisory Committee Meeting>
+<Student Feedback Collection, partOf, Extracurricular Activity>
+<start, integrates, Alumni Network Management>
diff --git a/test/mermaid/hard/mermaid_120.mmd b/test/mermaid/hard/mermaid_120.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..25f4e6e6d024f6917ec4cd43271de891f466b7a5
--- /dev/null
+++ b/test/mermaid/hard/mermaid_120.mmd
@@ -0,0 +1,104 @@
+graph TD
+    N0([start])
+    N1[Permafrost Thaw Assessment]
+    N2[(Adaptation Strategy Development)]
+    N3[/Remote Sensing for Climate/]
+    N4[[Renewable Energy Potential Assessment]]
+    N5[Cloud Formation Research]
+    N6([Solar Radiation Management Research])
+    N7[/Mitigation Technology Evaluation/]
+    N8{Carbon Cycle Research}
+    N9[(Biodiversity Impact Assessment)]
+    N10[(Green Technology Incubation)]
+    S0(( ))
+    S2(( ))
+    subgraph Climate Modeling
+        nest0_0[(Climate Finance Tracking)]
+        nest0_1([Arctic and Antarctic Research])
+        nest0_2(Drought Monitoring and Forecasting)
+    end
+    subgraph Climate Change Vulnerability Assessment
+        nest1_0(Ocean Current Analysis)
+        nest1_1(Environmental Justice Study)
+        nest1_2{Extreme Weather Event Analysis}
+        nest1_3[[International Climate Negotiation]]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> |assesses| N9
+    N9 -.-> N10
+    nest0_0 -.-> |predicts| nest0_1
+    nest0_1 --> nest0_2
+    N8 -.-> nest0_0
+    nest0_2 --> N4
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N8 --> nest1_0
+    nest1_3 --> N3
+    N3 --> S0
+    S0 --> N8
+    S0 --> N9
+    S0 -.-> N10
+    S0 -.-> N7
+    N0 -.-> S2
+    S2 -.-> N5
+    S2 --> N4
+    S2 -.-> N10
+    N6 --> N0
+    style N0 fill:#FAEBF3,stroke:#F7BEE0
+    style N1 fill:#FFFDE0,stroke:#FFF8A6
+    style N2 fill:#B3E5FC,stroke:#03A9F4
+    style N3 fill:#B3E5FC,stroke:#03A9F4
+    style N4 fill:#FAEBF3,stroke:#F7BEE0
+    style N5 fill:#FFFDE0,stroke:#FFF8A6
+    style N6 fill:#FAEBF3,stroke:#F7BEE0
+    style N7 fill:#FFFDE0,stroke:#FFF8A6
+    style N8 fill:#FFFDE0,stroke:#FFF8A6
+    style N9 fill:#FAEBF3,stroke:#F7BEE0
+    style N10 fill:#FFFDE0,stroke:#FFF8A6
+    style S0 fill:#FFFDE0,stroke:#FFF8A6
+    style S2 fill:#FAEBF3,stroke:#F7BEE0
+    style nest0_0 fill:#FAEBF3,stroke:#F7BEE0
+    style nest0_1 fill:#FFFDE0,stroke:#FFF8A6
+    style nest0_2 fill:#FFFDE0,stroke:#FFF8A6
+    style nest1_0 fill:#B3E5FC,stroke:#03A9F4
+    style nest1_1 fill:#B3E5FC,stroke:#03A9F4
+    style nest1_2 fill:#FFFDE0,stroke:#FFF8A6
+    style nest1_3 fill:#FAEBF3,stroke:#F7BEE0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#F7BEE0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_120.txt b/test/mermaid/hard/mermaid_120.txt
new file mode 100644
index 0000000000000000000000000000000000000000..2cbabc67e73f5f6312ce1327d4a957ae3c55c2d4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_120.txt
@@ -0,0 +1,34 @@
+<Adaptation Strategy Development, connectedTo, Remote Sensing for Climate>
+<Arctic and Antarctic Research, connectedTo, Drought Monitoring and Forecasting>
+<Arctic and Antarctic Research, partOf, Climate Modeling>
+<Biodiversity Impact Assessment, connectedTo, Green Technology Incubation>
+<Carbon Cycle Research, assesses, Biodiversity Impact Assessment>
+<Carbon Cycle Research, connectedTo, Climate Finance Tracking>
+<Carbon Cycle Research, connectedTo, Ocean Current Analysis>
+<Climate Finance Tracking, partOf, Climate Modeling>
+<Climate Finance Tracking, predicts, Arctic and Antarctic Research>
+<Cloud Formation Research, connectedTo, Solar Radiation Management Research>
+<Drought Monitoring and Forecasting, connectedTo, Renewable Energy Potential Assessment>
+<Drought Monitoring and Forecasting, partOf, Climate Modeling>
+<Environmental Justice Study, connectedTo, Extreme Weather Event Analysis>
+<Environmental Justice Study, partOf, Climate Change Vulnerability Assessment>
+<Extreme Weather Event Analysis, connectedTo, International Climate Negotiation>
+<Extreme Weather Event Analysis, partOf, Climate Change Vulnerability Assessment>
+<International Climate Negotiation, connectedTo, Remote Sensing for Climate>
+<International Climate Negotiation, partOf, Climate Change Vulnerability Assessment>
+<Mitigation Technology Evaluation, connectedTo, Carbon Cycle Research>
+<Ocean Current Analysis, connectedTo, Environmental Justice Study>
+<Ocean Current Analysis, partOf, Climate Change Vulnerability Assessment>
+<Permafrost Thaw Assessment, connectedTo, Adaptation Strategy Development>
+<Remote Sensing for Climate, connectedTo, Biodiversity Impact Assessment>
+<Remote Sensing for Climate, connectedTo, Carbon Cycle Research>
+<Remote Sensing for Climate, connectedTo, Green Technology Incubation>
+<Remote Sensing for Climate, connectedTo, Mitigation Technology Evaluation>
+<Remote Sensing for Climate, connectedTo, Renewable Energy Potential Assessment>
+<Renewable Energy Potential Assessment, connectedTo, Cloud Formation Research>
+<Solar Radiation Management Research, connectedTo, Mitigation Technology Evaluation>
+<Solar Radiation Management Research, connectedTo, start>
+<start, connectedTo, Cloud Formation Research>
+<start, connectedTo, Green Technology Incubation>
+<start, connectedTo, Permafrost Thaw Assessment>
+<start, connectedTo, Renewable Energy Potential Assessment>
diff --git a/test/mermaid/hard/mermaid_121.mmd b/test/mermaid/hard/mermaid_121.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..3eca72a39e9bc6a1e3d108b38d4589308ab5c0a7
--- /dev/null
+++ b/test/mermaid/hard/mermaid_121.mmd
@@ -0,0 +1,142 @@
+graph RL
+    N0([Satellite Meteorology])
+    N1(Flood Prediction)
+    N2[Severe Weather Warning]
+    N3[Marine Weather Forecast]
+    N4[/Climate Data Archiving/]
+    N5(Humidity Sensing)
+    N6(Atmospheric Data Collection)
+    N7[/Drought Monitoring/]
+    N8([Weather Forecasting])
+    N9[(Meteorological Station Maintenance)]
+    N10[Precipitation Measurement]
+    N11[/Climate Change Impact Study/]
+    N12([Temperature Monitoring])
+    N13(Storm Tracking)
+    N14[[Numerical Weather Prediction]]
+    N15{Wind Speed and Direction}
+    N16([Tropical Cyclone Analysis])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Aviation Weather Briefing
+        nest0_0[Arctic Weather Research]
+        nest0_1[(Agricultural Weather Advisory)]
+        nest0_2(Tornado Watch or Warning)
+    end
+    subgraph Boundary Layer Study
+        nest1_0([Lightning Detection])
+        nest1_1[(Atmospheric Sounding)]
+    end
+    N0 --> |supports| N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> |detects| N4
+    N4 -.-> |analyzes| N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> |advises| N8
+    N8 -.-> N9
+    N9 --> |warns| N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    N15 -.-> N16
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N4 -.-> nest0_0
+    nest0_2 -.-> N1
+    nest1_0 --> nest1_1
+    N7 --> nest1_0
+    nest1_1 -.-> N3
+    N5 -.-> S0
+    S0 -.-> N11
+    S0 -.-> N16
+    S0 -.-> N7
+    N3 -.-> S1
+    S1 --> N7
+    S1 -.-> N5
+    S1 --> N8
+    N13 --> S2
+    S2 -.-> N16
+    S2 --> N15
+    N5 -.-> M0
+    N13 --> M0
+    N7 -.-> M0
+    M0 -.-> N16
+    N3 --> M1
+    N9 --> M1
+    M1 -.-> N14
+    style N0 fill:#CADEDE,stroke:#94C0C0
+    style N1 fill:#CADEDE,stroke:#94C0C0
+    style N2 fill:#DED7F0,stroke:#A188DB
+    style N3 fill:#DED7F0,stroke:#A188DB
+    style N4 fill:#DED7F0,stroke:#A188DB
+    style N5 fill:#CADEDE,stroke:#94C0C0
+    style N6 fill:#CADEDE,stroke:#94C0C0
+    style N7 fill:#DED7F0,stroke:#A188DB
+    style N8 fill:#D1C4E9,stroke:#7E57C2
+    style N9 fill:#D1C4E9,stroke:#7E57C2
+    style N10 fill:#CADEDE,stroke:#94C0C0
+    style N11 fill:#CADEDE,stroke:#94C0C0
+    style N12 fill:#CADEDE,stroke:#94C0C0
+    style N13 fill:#DED7F0,stroke:#A188DB
+    style N14 fill:#DED7F0,stroke:#A188DB
+    style N15 fill:#DED7F0,stroke:#A188DB
+    style N16 fill:#D1C4E9,stroke:#7E57C2
+    style S0 fill:#D1C4E9,stroke:#7E57C2
+    style S1 fill:#DED7F0,stroke:#A188DB
+    style S2 fill:#D1C4E9,stroke:#7E57C2
+    style M0 fill:#D1C4E9,stroke:#7E57C2
+    style M1 fill:#D1C4E9,stroke:#7E57C2
+    style nest0_0 fill:#CADEDE,stroke:#94C0C0
+    style nest0_1 fill:#DED7F0,stroke:#A188DB
+    style nest0_2 fill:#D1C4E9,stroke:#7E57C2
+    style nest1_0 fill:#CADEDE,stroke:#94C0C0
+    style nest1_1 fill:#D1C4E9,stroke:#7E57C2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#94C0C0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_121.txt b/test/mermaid/hard/mermaid_121.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6e544a8012021299e5a97775fd03517f7d4ea02d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_121.txt
@@ -0,0 +1,39 @@
+<Agricultural Weather Advisory, connectedTo, Tornado Watch or Warning>
+<Agricultural Weather Advisory, partOf, Aviation Weather Briefing>
+<Arctic Weather Research, connectedTo, Agricultural Weather Advisory>
+<Arctic Weather Research, partOf, Aviation Weather Briefing>
+<Atmospheric Data Collection, connectedTo, Drought Monitoring>
+<Atmospheric Sounding, connectedTo, Marine Weather Forecast>
+<Atmospheric Sounding, partOf, Boundary Layer Study>
+<Climate Change Impact Study, connectedTo, Temperature Monitoring>
+<Climate Data Archiving, analyzes, Humidity Sensing>
+<Climate Data Archiving, connectedTo, Arctic Weather Research>
+<Drought Monitoring, advises, Weather Forecasting>
+<Drought Monitoring, connectedTo, Lightning Detection>
+<Drought Monitoring, connectedTo, Tropical Cyclone Analysis>
+<Flood Prediction, connectedTo, Severe Weather Warning>
+<Humidity Sensing, connectedTo, Atmospheric Data Collection>
+<Humidity Sensing, connectedTo, Climate Change Impact Study>
+<Humidity Sensing, connectedTo, Drought Monitoring>
+<Humidity Sensing, connectedTo, Tropical Cyclone Analysis>
+<Lightning Detection, connectedTo, Atmospheric Sounding>
+<Lightning Detection, partOf, Boundary Layer Study>
+<Marine Weather Forecast, connectedTo, Drought Monitoring>
+<Marine Weather Forecast, connectedTo, Humidity Sensing>
+<Marine Weather Forecast, connectedTo, Numerical Weather Prediction>
+<Marine Weather Forecast, connectedTo, Weather Forecasting>
+<Marine Weather Forecast, detects, Climate Data Archiving>
+<Meteorological Station Maintenance, connectedTo, Numerical Weather Prediction>
+<Meteorological Station Maintenance, warns, Precipitation Measurement>
+<Numerical Weather Prediction, connectedTo, Wind Speed and Direction>
+<Precipitation Measurement, connectedTo, Climate Change Impact Study>
+<Satellite Meteorology, supports, Flood Prediction>
+<Severe Weather Warning, connectedTo, Marine Weather Forecast>
+<Storm Tracking, connectedTo, Numerical Weather Prediction>
+<Storm Tracking, connectedTo, Tropical Cyclone Analysis>
+<Storm Tracking, connectedTo, Wind Speed and Direction>
+<Temperature Monitoring, connectedTo, Storm Tracking>
+<Tornado Watch or Warning, connectedTo, Flood Prediction>
+<Tornado Watch or Warning, partOf, Aviation Weather Briefing>
+<Weather Forecasting, connectedTo, Meteorological Station Maintenance>
+<Wind Speed and Direction, connectedTo, Tropical Cyclone Analysis>
diff --git a/test/mermaid/hard/mermaid_122.mmd b/test/mermaid/hard/mermaid_122.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..9c5815885ede8de86cb49da7d56960cde0aab7dd
--- /dev/null
+++ b/test/mermaid/hard/mermaid_122.mmd
@@ -0,0 +1,132 @@
+graph RL
+    N0([Temperature Monitoring])
+    N1([Weather Forecasting])
+    N2[Precipitation Measurement]
+    N3[Cloud Observation]
+    N4([Agricultural Weather Advisory])
+    N5(Boundary Layer Study)
+    N6[Fire Weather Forecasting]
+    N7[[Nowcasting]]
+    N8[Ocean_Atmosphere Interaction Study]
+    N9(Satellite Meteorology)
+    N10([Meteorological Instrument Calibration])
+    N11[(Tropical Cyclone Analysis)]
+    N12[/Hurricane Trajectory Modeling/]
+    N13([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Seasonal Outlook Preparation
+        nest0_0[(Mesoscale Meteorology)]
+        nest0_1(Radar Imaging)
+        nest0_2[/Aviation Weather Briefing/]
+        nest0_3(Numerical Weather Prediction)
+    end
+    subgraph Severe Weather Warning
+        nest1_0[Lightning Detection]
+        nest1_1[[Meteorological Station Maintenance]]
+        nest1_2(Climate Change Impact Study)
+    end
+    N0 -.-> |predicts| N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> |integrates| N13
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N12 --> nest0_0
+    nest0_3 -.-> N9
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N5 -.-> nest1_0
+    nest1_2 --> N2
+    N7 -.-> S0
+    S0 --> N12
+    S0 --> |detects| N11
+    S0 --> N13
+    S0 -.-> N9
+    N9 --> S1
+    S1 -.-> N11
+    S1 --> N12
+    N5 -.-> M0
+    N1 --> M0
+    N9 -.-> M0
+    M0 --> N11
+    N5 -.-> M1
+    N8 -.-> M1
+    N6 -.-> M1
+    M1 -.-> N10
+    style N0 fill:#F5F5DC,stroke:#BCB88A
+    style N1 fill:#FFCCBC,stroke:#FF5722
+    style N2 fill:#F5F5DC,stroke:#BCB88A
+    style N3 fill:#EDF5F3,stroke:#A1D7CD
+    style N4 fill:#EDF5F3,stroke:#A1D7CD
+    style N5 fill:#EDF5F3,stroke:#A1D7CD
+    style N6 fill:#EDF5F3,stroke:#A1D7CD
+    style N7 fill:#FFCCBC,stroke:#FF5722
+    style N8 fill:#FFCCBC,stroke:#FF5722
+    style N9 fill:#FFCCBC,stroke:#FF5722
+    style N10 fill:#F5F5DC,stroke:#BCB88A
+    style N11 fill:#FFCCBC,stroke:#FF5722
+    style N12 fill:#EDF5F3,stroke:#A1D7CD
+    style N13 fill:#F5F5DC,stroke:#BCB88A
+    style S0 fill:#F5F5DC,stroke:#BCB88A
+    style S1 fill:#FFCCBC,stroke:#FF5722
+    style M0 fill:#EDF5F3,stroke:#A1D7CD
+    style M1 fill:#FFCCBC,stroke:#FF5722
+    style nest0_0 fill:#EDF5F3,stroke:#A1D7CD
+    style nest0_1 fill:#F5F5DC,stroke:#BCB88A
+    style nest0_2 fill:#FFCCBC,stroke:#FF5722
+    style nest0_3 fill:#EDF5F3,stroke:#A1D7CD
+    style nest1_0 fill:#EDF5F3,stroke:#A1D7CD
+    style nest1_1 fill:#EDF5F3,stroke:#A1D7CD
+    style nest1_2 fill:#FFCCBC,stroke:#FF5722
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FF5722,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_123.mmd b/test/mermaid/hard/mermaid_123.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..b525e0e7f2a568e1b7b09b2f338f4230c5f62f7d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_123.mmd
@@ -0,0 +1,144 @@
+graph LR
+    N0([start])
+    N1{Tropical Cyclone Analysis}
+    N2(Precipitation Measurement)
+    N3[[Flood Prediction]]
+    N4{Weather Forecasting}
+    N5(Pollution Dispersion Modeling)
+    N6[Climate Data Archiving]
+    N7[Radar Imaging]
+    N8(Meteorological Station Maintenance)
+    N9(Mesoscale Meteorology)
+    N10[/Aviation Weather Briefing/]
+    N11[Satellite Meteorology]
+    N12[Humidity Sensing]
+    N13(Numerical Weather Prediction)
+    N14([Climate Change Impact Study])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Wind Speed and Direction
+        nest0_0[(Storm Tracking)]
+        nest0_1([Seasonal Outlook Preparation])
+        nest0_2[Snowfall Measurement]
+    end
+    subgraph Hurricane Trajectory Modeling
+        nest1_0[Marine Weather Forecast]
+        nest1_1{Agricultural Weather Advisory}
+        nest1_2[[Drought Monitoring]]
+        nest1_3[Severe Weather Warning]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 -.-> N14
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N1 --> nest0_0
+    nest0_2 -.-> N3
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> nest1_3
+    N3 --> nest1_0
+    nest1_3 --> N5
+    N9 -.-> S0
+    S0 -.-> N13
+    S0 -.-> N11
+    N8 --> S1
+    S1 --> N13
+    S1 -.-> N10
+    S1 -.-> N12
+    N2 --> S2
+    S2 --> N14
+    S2 --> N8
+    S2 --> N13
+    N3 -.-> M0
+    N7 -.-> M0
+    N4 --> M0
+    M0 -.-> N12
+    N1 -.-> M1
+    N2 -.-> M1
+    N0 --> M1
+    M1 --> N5
+    style N0 fill:#F0F4C3,stroke:#AED581
+    style N1 fill:#EDF5F3,stroke:#A1D7CD
+    style N2 fill:#EDF5F3,stroke:#A1D7CD
+    style N3 fill:#F0F4C3,stroke:#AED581
+    style N4 fill:#EDF5F3,stroke:#A1D7CD
+    style N5 fill:#F5F5F5,stroke:#BDBDBD
+    style N6 fill:#F5F5F5,stroke:#BDBDBD
+    style N7 fill:#EDF5F3,stroke:#A1D7CD
+    style N8 fill:#F5F5F5,stroke:#BDBDBD
+    style N9 fill:#EDF5F3,stroke:#A1D7CD
+    style N10 fill:#F5F5F5,stroke:#BDBDBD
+    style N11 fill:#F5F5F5,stroke:#BDBDBD
+    style N12 fill:#F0F4C3,stroke:#AED581
+    style N13 fill:#EDF5F3,stroke:#A1D7CD
+    style N14 fill:#F0F4C3,stroke:#AED581
+    style S0 fill:#EDF5F3,stroke:#A1D7CD
+    style S1 fill:#EDF5F3,stroke:#A1D7CD
+    style S2 fill:#F0F4C3,stroke:#AED581
+    style M0 fill:#EDF5F3,stroke:#A1D7CD
+    style M1 fill:#F0F4C3,stroke:#AED581
+    style nest0_0 fill:#F5F5F5,stroke:#BDBDBD
+    style nest0_1 fill:#F0F4C3,stroke:#AED581
+    style nest0_2 fill:#EDF5F3,stroke:#A1D7CD
+    style nest1_0 fill:#F5F5F5,stroke:#BDBDBD
+    style nest1_1 fill:#F0F4C3,stroke:#AED581
+    style nest1_2 fill:#F0F4C3,stroke:#AED581
+    style nest1_3 fill:#F5F5F5,stroke:#BDBDBD
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#BDBDBD,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_124.mmd b/test/mermaid/hard/mermaid_124.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..a98b33326bc4051ac1691d1ef56a89433ba58c3f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_124.mmd
@@ -0,0 +1,86 @@
+graph RL
+    N0([start])
+    N1(Public Education on Waste)
+    N2(Resource Recovery)
+    N3[(Container Management)]
+    N4(Community Recycling Programs)
+    N5[(Waste Reduction Planning)]
+    N6([Material Recovery Facility Operation])
+    N7([Smart Waste Bins])
+    N8[[Electronic Waste Recycling]]
+    N9([Waste Characterization Study])
+    N10[[Recycling Processing]]
+    N11[Waste Compaction]
+    N12([Anaerobic Digestion])
+    S0(( ))
+    S1(( ))
+    M1(( ))
+    subgraph Zero Waste Initiatives
+        nest0_0[[Composting]]
+        nest0_1(Plastic Recycling Technologies)
+    end
+    subgraph Paper Recycling
+        nest1_0(Closed_Loop Systems)
+        nest1_1{Waste_to_Energy Conversion}
+        nest1_2[Waste Logistics Optimization]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> |yes| N10
+    N10 --> N11
+    N11 --> N12
+    nest0_0 --> nest0_1
+    N9 --> nest0_0
+    nest0_1 --> |yes| N12
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N3 --> nest1_0
+    nest1_2 --> N3
+    N9 -.-> S0
+    S0 --> N11
+    S0 --> N12
+    N7 --> S1
+    S1 -.-> N12
+    S1 -.-> N11
+    N2 -.-> M1
+    N1 -.-> M1
+    M1 --> N8
+    style S0 fill:#E8F0FF,stroke:#A2D0FF
+    style S1 fill:#FFF0CC,stroke:#FFCC80
+    style M1 fill:#FFF0CC,stroke:#FFCC80
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFF9AE,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_125.mmd b/test/mermaid/hard/mermaid_125.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..820e32dbac723c63ce3fe3fb4719fb3587391d22
--- /dev/null
+++ b/test/mermaid/hard/mermaid_125.mmd
@@ -0,0 +1,128 @@
+graph TD
+    N0([start])
+    N1{Landfill Operation}
+    N2[(Public Education on Waste)]
+    N3{Glass Recycling}
+    N4[Waste Incineration]
+    N5(Recycling Processing)
+    N6[Leachate Treatment]
+    N7[[Waste Reduction Planning]]
+    N8[[Waste_to_Energy Conversion]]
+    N9{Landfill Gas Collection}
+    N10[/Waste Audit/]
+    N11[/Smart Waste Bins/]
+    N12{Container Management}
+    N13([Metal Recycling])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Extended Producer Responsibility
+        nest0_0{Community Recycling Programs}
+        nest0_1[Industrial Waste Management]
+    end
+    subgraph Anaerobic Digestion
+        nest1_0[Waste Management Data Analytics]
+        nest1_1{Hazardous Waste Disposal}
+        nest1_2[Zero Waste Initiatives]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> |transports| N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    nest0_0 -.-> |inspects| nest0_1
+    N5 -.-> nest0_0
+    nest0_1 -.-> N5
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N10 --> nest1_0
+    nest1_2 -.-> N11
+    N10 -.-> S0
+    S0 -.-> N12
+    S0 -.-> N13
+    N1 --> S1
+    S1 -.-> N8
+    S1 -.-> N10
+    N2 -.-> M0
+    N5 -.-> M0
+    M0 --> N9
+    N2 -.-> M1
+    N3 -.-> M1
+    M1 --> N5
+    N0 --> M2
+    N3 -.-> M2
+    N1 --> M2
+    N2 --> M2
+    M2 -.-> N5
+    style N0 fill:#EFEBE9,stroke:#A1887F
+    style N1 fill:#FFFDE0,stroke:#FFF8A6
+    style N2 fill:#E8F0EA,stroke:#92C79A
+    style N3 fill:#EFEBE9,stroke:#A1887F
+    style N4 fill:#E8F0EA,stroke:#92C79A
+    style N5 fill:#FFFDE0,stroke:#FFF8A6
+    style N6 fill:#FFFDE0,stroke:#FFF8A6
+    style N7 fill:#EFEBE9,stroke:#A1887F
+    style N8 fill:#FFFDE0,stroke:#FFF8A6
+    style N9 fill:#FFFDE0,stroke:#FFF8A6
+    style N10 fill:#E8F0EA,stroke:#92C79A
+    style N11 fill:#FFFDE0,stroke:#FFF8A6
+    style N12 fill:#EFEBE9,stroke:#A1887F
+    style N13 fill:#EFEBE9,stroke:#A1887F
+    style S0 fill:#FFFDE0,stroke:#FFF8A6
+    style S1 fill:#E8F0EA,stroke:#92C79A
+    style M0 fill:#E8F0EA,stroke:#92C79A
+    style M1 fill:#EFEBE9,stroke:#A1887F
+    style M2 fill:#EFEBE9,stroke:#A1887F
+    style nest0_0 fill:#E8F0EA,stroke:#92C79A
+    style nest0_1 fill:#FFFDE0,stroke:#FFF8A6
+    style nest1_0 fill:#FFFDE0,stroke:#FFF8A6
+    style nest1_1 fill:#FFFDE0,stroke:#FFF8A6
+    style nest1_2 fill:#FFFDE0,stroke:#FFF8A6
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_125.txt b/test/mermaid/hard/mermaid_125.txt
new file mode 100644
index 0000000000000000000000000000000000000000..cd8bb8e05fee950f24fbd0bfe6283624dd787ed5
--- /dev/null
+++ b/test/mermaid/hard/mermaid_125.txt
@@ -0,0 +1,35 @@
+<Community Recycling Programs, inspects, Industrial Waste Management>
+<Community Recycling Programs, partOf, Extended Producer Responsibility>
+<Container Management, connectedTo, Metal Recycling>
+<Glass Recycling, connectedTo, Recycling Processing>
+<Glass Recycling, transports, Waste Incineration>
+<Hazardous Waste Disposal, connectedTo, Zero Waste Initiatives>
+<Hazardous Waste Disposal, partOf, Anaerobic Digestion>
+<Industrial Waste Management, connectedTo, Recycling Processing>
+<Industrial Waste Management, partOf, Extended Producer Responsibility>
+<Landfill Gas Collection, connectedTo, Waste Audit>
+<Landfill Operation, connectedTo, Public Education on Waste>
+<Landfill Operation, connectedTo, Recycling Processing>
+<Landfill Operation, connectedTo, Waste Audit>
+<Landfill Operation, connectedTo, Waste_to_Energy Conversion>
+<Leachate Treatment, connectedTo, Waste Reduction Planning>
+<Public Education on Waste, connectedTo, Glass Recycling>
+<Public Education on Waste, connectedTo, Landfill Gas Collection>
+<Public Education on Waste, connectedTo, Recycling Processing>
+<Recycling Processing, connectedTo, Community Recycling Programs>
+<Recycling Processing, connectedTo, Landfill Gas Collection>
+<Recycling Processing, connectedTo, Leachate Treatment>
+<Smart Waste Bins, connectedTo, Container Management>
+<Waste Audit, connectedTo, Container Management>
+<Waste Audit, connectedTo, Metal Recycling>
+<Waste Audit, connectedTo, Smart Waste Bins>
+<Waste Audit, connectedTo, Waste Management Data Analytics>
+<Waste Incineration, connectedTo, Recycling Processing>
+<Waste Management Data Analytics, connectedTo, Hazardous Waste Disposal>
+<Waste Management Data Analytics, partOf, Anaerobic Digestion>
+<Waste Reduction Planning, connectedTo, Waste_to_Energy Conversion>
+<Waste_to_Energy Conversion, connectedTo, Landfill Gas Collection>
+<Zero Waste Initiatives, connectedTo, Smart Waste Bins>
+<Zero Waste Initiatives, partOf, Anaerobic Digestion>
+<start, connectedTo, Landfill Operation>
+<start, connectedTo, Recycling Processing>
diff --git a/test/mermaid/hard/mermaid_126.mmd b/test/mermaid/hard/mermaid_126.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..0979ff41f5d208a31c75956fe74e30d986e81d4f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_126.mmd
@@ -0,0 +1,144 @@
+graph RL
+    N0([Closed_Loop Systems])
+    N1[Illegal Dumping Monitoring]
+    N2(Hazardous Waste Disposal)
+    N3[Composting]
+    N4(Plastic Recycling Technologies)
+    N5{Textile Recycling}
+    N6(Waste Compaction)
+    N7[/Glass Recycling/]
+    N8(Landfill Gas Collection)
+    N9{Extended Producer Responsibility}
+    N10(Landfill Operation)
+    N11{Biomedical Waste Handling}
+    N12[Paper Recycling]
+    N13[(Waste Incineration)]
+    N14[(Community Recycling Programs)]
+    N15(Construction and Demolition Waste Management)
+    N16[Waste_to_Energy Conversion]
+    N17[(Waste Sorting)]
+    N18([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Smart Waste Bins
+        nest0_0[Waste Management Policy Development]
+        nest0_1([Leachate Treatment])
+    end
+    subgraph Waste Collection
+        nest1_0(Waste Reduction Planning)
+        nest1_1[[Container Management]]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> |recovers| N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 -.-> N15
+    N15 -.-> N16
+    N16 --> N17
+    N17 --> |plans| N18
+    nest0_0 -.-> nest0_1
+    N2 -.-> nest0_0
+    nest0_1 --> N16
+    nest1_0 --> nest1_1
+    N14 --> nest1_0
+    nest1_1 --> N6
+    N10 --> S0
+    S0 -.-> N17
+    S0 -.-> N12
+    N7 -.-> S1
+    S1 -.-> N16
+    S1 -.-> N15
+    S1 --> N18
+    N3 -.-> M0
+    N0 --> M0
+    M0 --> N5
+    N9 --> M1
+    N12 -.-> M1
+    M1 --> N14
+    N10 -.-> M2
+    N4 --> M2
+    N13 -.-> M2
+    M2 -.-> N16
+    style N0 fill:#E8F0EA,stroke:#92C79A
+    style N1 fill:#F1F8FF,stroke:#42A5F5
+    style N2 fill:#EDE7F6,stroke:#7E57C2
+    style N3 fill:#EDE7F6,stroke:#7E57C2
+    style N4 fill:#EDE7F6,stroke:#7E57C2
+    style N5 fill:#E8F0EA,stroke:#92C79A
+    style N6 fill:#EDE7F6,stroke:#7E57C2
+    style N7 fill:#F1F8FF,stroke:#42A5F5
+    style N8 fill:#F1F8FF,stroke:#42A5F5
+    style N9 fill:#F1F8FF,stroke:#42A5F5
+    style N10 fill:#F1F8FF,stroke:#42A5F5
+    style N11 fill:#F1F8FF,stroke:#42A5F5
+    style N12 fill:#E8F0EA,stroke:#92C79A
+    style N13 fill:#EDE7F6,stroke:#7E57C2
+    style N14 fill:#E8F0EA,stroke:#92C79A
+    style N15 fill:#F1F8FF,stroke:#42A5F5
+    style N16 fill:#E8F0EA,stroke:#92C79A
+    style N17 fill:#F1F8FF,stroke:#42A5F5
+    style N18 fill:#EDE7F6,stroke:#7E57C2
+    style S0 fill:#E8F0EA,stroke:#92C79A
+    style S1 fill:#F1F8FF,stroke:#42A5F5
+    style M0 fill:#EDE7F6,stroke:#7E57C2
+    style M1 fill:#E8F0EA,stroke:#92C79A
+    style M2 fill:#E8F0EA,stroke:#92C79A
+    style nest0_0 fill:#E8F0EA,stroke:#92C79A
+    style nest0_1 fill:#EDE7F6,stroke:#7E57C2
+    style nest1_0 fill:#F1F8FF,stroke:#42A5F5
+    style nest1_1 fill:#F1F8FF,stroke:#42A5F5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#92C79A,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_126.txt b/test/mermaid/hard/mermaid_126.txt
new file mode 100644
index 0000000000000000000000000000000000000000..40325ee875a6aec0c08aa368fd693c7f270e466d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_126.txt
@@ -0,0 +1,40 @@
+<Biomedical Waste Handling, connectedTo, Paper Recycling>
+<Closed_Loop Systems, connectedTo, Illegal Dumping Monitoring>
+<Closed_Loop Systems, connectedTo, Textile Recycling>
+<Community Recycling Programs, connectedTo, Construction and Demolition Waste Management>
+<Community Recycling Programs, connectedTo, Waste Reduction Planning>
+<Composting, connectedTo, Textile Recycling>
+<Composting, recovers, Plastic Recycling Technologies>
+<Construction and Demolition Waste Management, connectedTo, Waste_to_Energy Conversion>
+<Container Management, connectedTo, Waste Compaction>
+<Container Management, partOf, Waste Collection>
+<Extended Producer Responsibility, connectedTo, Community Recycling Programs>
+<Extended Producer Responsibility, connectedTo, Landfill Operation>
+<Glass Recycling, connectedTo, Construction and Demolition Waste Management>
+<Glass Recycling, connectedTo, Landfill Gas Collection>
+<Glass Recycling, connectedTo, Waste_to_Energy Conversion>
+<Glass Recycling, connectedTo, end>
+<Hazardous Waste Disposal, connectedTo, Composting>
+<Hazardous Waste Disposal, connectedTo, Waste Management Policy Development>
+<Illegal Dumping Monitoring, connectedTo, Hazardous Waste Disposal>
+<Landfill Gas Collection, connectedTo, Extended Producer Responsibility>
+<Landfill Operation, connectedTo, Biomedical Waste Handling>
+<Landfill Operation, connectedTo, Paper Recycling>
+<Landfill Operation, connectedTo, Waste Sorting>
+<Landfill Operation, connectedTo, Waste_to_Energy Conversion>
+<Leachate Treatment, connectedTo, Waste_to_Energy Conversion>
+<Leachate Treatment, partOf, Smart Waste Bins>
+<Paper Recycling, connectedTo, Community Recycling Programs>
+<Paper Recycling, connectedTo, Waste Incineration>
+<Plastic Recycling Technologies, connectedTo, Textile Recycling>
+<Plastic Recycling Technologies, connectedTo, Waste_to_Energy Conversion>
+<Textile Recycling, connectedTo, Waste Compaction>
+<Waste Compaction, connectedTo, Glass Recycling>
+<Waste Incineration, connectedTo, Community Recycling Programs>
+<Waste Incineration, connectedTo, Waste_to_Energy Conversion>
+<Waste Management Policy Development, connectedTo, Leachate Treatment>
+<Waste Management Policy Development, partOf, Smart Waste Bins>
+<Waste Reduction Planning, connectedTo, Container Management>
+<Waste Reduction Planning, partOf, Waste Collection>
+<Waste Sorting, plans, end>
+<Waste_to_Energy Conversion, connectedTo, Waste Sorting>
diff --git a/test/mermaid/hard/mermaid_127.txt b/test/mermaid/hard/mermaid_127.txt
new file mode 100644
index 0000000000000000000000000000000000000000..32aca8f2fd692d10e8f94a83baf34976856cb72c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_127.txt
@@ -0,0 +1,32 @@
+<Agricultural Water Use Efficiency, connectedTo, Billing and Revenue Management>
+<Agricultural Water Use Efficiency, partOf, Wastewater Treatment>
+<Billing and Revenue Management, connectedTo, Water Treatment>
+<Billing and Revenue Management, partOf, Wastewater Treatment>
+<Environmental Flow Assessment, connectedTo, Greywater Recycling>
+<Environmental Flow Assessment, partOf, Water Quality Monitoring>
+<Greywater Recycling, connectedTo, Water Meter Reading>
+<Greywater Recycling, partOf, Water Quality Monitoring>
+<Groundwater Management, connectedTo, Irrigation Management>
+<Groundwater Management, connectedTo, Rainwater Harvesting>
+<Hydrological Modeling, connectedTo, Aquifer Recharge>
+<Hydrological Modeling, connectedTo, Water Loss Detection>
+<Hydrological Modeling, connectedTo, Water Treatment>
+<Irrigation Management, connectedTo, Agricultural Water Use Efficiency>
+<Irrigation Management, partOf, Wastewater Treatment>
+<Rainwater Harvesting, connectedTo, Hydrological Modeling>
+<Rainwater Harvesting, connectedTo, Water Loss Detection>
+<Rainwater Harvesting, connectedTo, Water Scarcity Mitigation>
+<Water Loss Detection, connectedTo, Water Treatment>
+<Water Meter Reading, connectedTo, Water Treatment>
+<Water Meter Reading, partOf, Water Quality Monitoring>
+<Water Resource Planning, connectedTo, Groundwater Management>
+<Water Resource Planning, connectedTo, Hydrological Modeling>
+<Water Resource Planning, connectedTo, Rainwater Harvesting>
+<Water Resource Planning, connectedTo, Water Loss Detection>
+<Water Scarcity Mitigation, connectedTo, Environmental Flow Assessment>
+<Water Scarcity Mitigation, partOf, Water Quality Monitoring>
+<Water Treatment, connectedTo, Aquifer Recharge>
+<start, connectedTo, Hydrological Modeling>
+<start, connectedTo, Rainwater Harvesting>
+<start, connectedTo, Water Loss Detection>
+<start, connectedTo, Water Resource Planning>
diff --git a/test/mermaid/hard/mermaid_128.mmd b/test/mermaid/hard/mermaid_128.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..fe3902d96c8b0978f893a0c867daca4c9eeaffce
--- /dev/null
+++ b/test/mermaid/hard/mermaid_128.mmd
@@ -0,0 +1,128 @@
+graph LR
+    N0([start])
+    N1[Water Scarcity Mitigation]
+    N2([Watershed Management])
+    N3[(Stormwater Management)]
+    N4([Smart Water Networks])
+    N5(Drought Management)
+    N6{Desalination}
+    N7[(Groundwater Management)]
+    N8{Water Distribution}
+    N9[[Public Awareness Campaigns]]
+    N10(Industrial Water Use Optimization)
+    N11[/Hydrological Modeling/]
+    N12([Water Quality Monitoring])
+    N13[/Drinking Water Standards Compliance/]
+    N14(Flood Control)
+    N15([Water Treatment])
+    N16[[Wastewater Collection]]
+    N17([Agricultural Water Use Efficiency])
+    S1(( ))
+    M1(( ))
+    subgraph Hydroelectric Power Generation
+        nest0_0[Reservoir Operation]
+        nest0_1[Rainwater Harvesting]
+    end
+    subgraph Dam Management
+        nest1_0[[Pollution Source Identification]]
+        nest1_1[/Water Conservation Planning/]
+        nest1_2[[Water Resource Planning]]
+        nest1_3[(Billing and Revenue Management)]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 --> N16
+    N16 --> N17
+    nest0_0 -.-> nest0_1
+    N12 --> nest0_0
+    nest0_1 -.-> N6
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N9 --> nest1_0
+    nest1_3 -.-> N13
+    N8 -.-> S1
+    S1 --> |drains| N16
+    S1 -.-> N13
+    S1 -.-> N12
+    N0 -.-> M1
+    N2 --> M1
+    N1 -.-> M1
+    M1 -.-> N4
+    N8 --> N7
+    N7 --> N1
+    style N0 fill:#FDFCEB,stroke:#EAEFA5
+    style N1 fill:#F0F4C3,stroke:#AED581
+    style N2 fill:#F0F4C3,stroke:#AED581
+    style N3 fill:#F1F8E9,stroke:#388E3C
+    style N4 fill:#FDFCEB,stroke:#EAEFA5
+    style N5 fill:#F1F8E9,stroke:#388E3C
+    style N6 fill:#F1F8E9,stroke:#388E3C
+    style N7 fill:#F0F4C3,stroke:#AED581
+    style N8 fill:#FDFCEB,stroke:#EAEFA5
+    style N9 fill:#F1F8E9,stroke:#388E3C
+    style N10 fill:#F1F8E9,stroke:#388E3C
+    style N11 fill:#FDFCEB,stroke:#EAEFA5
+    style N12 fill:#F1F8E9,stroke:#388E3C
+    style N13 fill:#F1F8E9,stroke:#388E3C
+    style N14 fill:#F0F4C3,stroke:#AED581
+    style N15 fill:#F1F8E9,stroke:#388E3C
+    style N16 fill:#F0F4C3,stroke:#AED581
+    style N17 fill:#F0F4C3,stroke:#AED581
+    style S1 fill:#F1F8E9,stroke:#388E3C
+    style M1 fill:#F0F4C3,stroke:#AED581
+    style nest0_0 fill:#FDFCEB,stroke:#EAEFA5
+    style nest0_1 fill:#F1F8E9,stroke:#388E3C
+    style nest1_0 fill:#F0F4C3,stroke:#AED581
+    style nest1_1 fill:#FDFCEB,stroke:#EAEFA5
+    style nest1_2 fill:#F0F4C3,stroke:#AED581
+    style nest1_3 fill:#FDFCEB,stroke:#EAEFA5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#AED581,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_128.txt b/test/mermaid/hard/mermaid_128.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7816cf4ed281137de439f024f99c39c296aa53aa
--- /dev/null
+++ b/test/mermaid/hard/mermaid_128.txt
@@ -0,0 +1,39 @@
+<Billing and Revenue Management, connectedTo, Drinking Water Standards Compliance>
+<Billing and Revenue Management, partOf, Dam Management>
+<Desalination, connectedTo, Groundwater Management>
+<Drinking Water Standards Compliance, connectedTo, Flood Control>
+<Drought Management, connectedTo, Desalination>
+<Flood Control, connectedTo, Water Treatment>
+<Groundwater Management, connectedTo, Water Distribution>
+<Groundwater Management, connectedTo, Water Scarcity Mitigation>
+<Hydrological Modeling, connectedTo, Water Quality Monitoring>
+<Industrial Water Use Optimization, connectedTo, Hydrological Modeling>
+<Pollution Source Identification, connectedTo, Water Conservation Planning>
+<Pollution Source Identification, partOf, Dam Management>
+<Public Awareness Campaigns, connectedTo, Industrial Water Use Optimization>
+<Public Awareness Campaigns, connectedTo, Pollution Source Identification>
+<Rainwater Harvesting, connectedTo, Desalination>
+<Rainwater Harvesting, partOf, Hydroelectric Power Generation>
+<Reservoir Operation, connectedTo, Rainwater Harvesting>
+<Reservoir Operation, partOf, Hydroelectric Power Generation>
+<Smart Water Networks, connectedTo, Drought Management>
+<Stormwater Management, connectedTo, Smart Water Networks>
+<Wastewater Collection, connectedTo, Agricultural Water Use Efficiency>
+<Water Conservation Planning, connectedTo, Water Resource Planning>
+<Water Conservation Planning, partOf, Dam Management>
+<Water Distribution, connectedTo, Drinking Water Standards Compliance>
+<Water Distribution, connectedTo, Groundwater Management>
+<Water Distribution, connectedTo, Public Awareness Campaigns>
+<Water Distribution, connectedTo, Water Quality Monitoring>
+<Water Distribution, drains, Wastewater Collection>
+<Water Quality Monitoring, connectedTo, Drinking Water Standards Compliance>
+<Water Quality Monitoring, connectedTo, Reservoir Operation>
+<Water Resource Planning, connectedTo, Billing and Revenue Management>
+<Water Resource Planning, partOf, Dam Management>
+<Water Scarcity Mitigation, connectedTo, Smart Water Networks>
+<Water Scarcity Mitigation, connectedTo, Watershed Management>
+<Water Treatment, connectedTo, Wastewater Collection>
+<Watershed Management, connectedTo, Smart Water Networks>
+<Watershed Management, connectedTo, Stormwater Management>
+<start, connectedTo, Smart Water Networks>
+<start, connectedTo, Water Scarcity Mitigation>
diff --git a/test/mermaid/hard/mermaid_129.mmd b/test/mermaid/hard/mermaid_129.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..5c46a5af41476c97ca5cc6ab95a96f4288418412
--- /dev/null
+++ b/test/mermaid/hard/mermaid_129.mmd
@@ -0,0 +1,106 @@
+graph RL
+    N0([Piping Network Repair])
+    N1{Water Meter Reading}
+    N2([Water Infrastructure Maintenance])
+    N3[Water Quality Monitoring]
+    N4[(Water Conservation Planning)]
+    N5[(Industrial Water Use Optimization)]
+    N6[(Water Source Identification)]
+    N7[(Desalination)]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    subgraph Water Distribution
+        nest0_0[/Smart Water Networks/]
+        nest0_1[[Greywater Recycling]]
+        nest0_2[Pollution Source Identification]
+    end
+    subgraph Water Resource Planning
+        nest1_0(Water Rights Management)
+        nest1_1{Agricultural Water Use Efficiency}
+        nest1_2[[Water Treatment]]
+        nest1_3[/Water Scarcity Mitigation/]
+    end
+    N0 --> N1
+    N1 --> |secures| N2
+    N2 --> N3
+    N3 --> |plans| N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N2 -.-> nest0_0
+    nest0_2 -.-> N7
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 -.-> nest1_3
+    N6 -.-> nest1_0
+    nest1_3 -.-> N6
+    N2 -.-> S0
+    S0 --> N4
+    S0 -.-> N6
+    N0 --> S1
+    S1 --> N2
+    S1 -.-> N3
+    S1 -.-> N7
+    S1 -.-> N5
+    N1 -.-> S2
+    S2 --> N7
+    S2 -.-> N3
+    N0 --> M0
+    N4 --> M0
+    N3 -.-> M0
+    M0 --> N6
+    style N0 fill:#F1F8E9,stroke:#388E3C
+    style N1 fill:#FBE9E7,stroke:#FF8A65
+    style N2 fill:#FBE9E7,stroke:#FF8A65
+    style N3 fill:#FFF3E0,stroke:#FFA726
+    style N4 fill:#F1F8E9,stroke:#388E3C
+    style N5 fill:#FBE9E7,stroke:#FF8A65
+    style N6 fill:#FBE9E7,stroke:#FF8A65
+    style N7 fill:#FBE9E7,stroke:#FF8A65
+    style S0 fill:#FBE9E7,stroke:#FF8A65
+    style S1 fill:#FBE9E7,stroke:#FF8A65
+    style S2 fill:#FFF3E0,stroke:#FFA726
+    style M0 fill:#FBE9E7,stroke:#FF8A65
+    style nest0_0 fill:#FBE9E7,stroke:#FF8A65
+    style nest0_1 fill:#FFF3E0,stroke:#FFA726
+    style nest0_2 fill:#FBE9E7,stroke:#FF8A65
+    style nest1_0 fill:#FFF3E0,stroke:#FFA726
+    style nest1_1 fill:#F1F8E9,stroke:#388E3C
+    style nest1_2 fill:#FBE9E7,stroke:#FF8A65
+    style nest1_3 fill:#FBE9E7,stroke:#FF8A65
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFA726,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_13.mmd b/test/mermaid/hard/mermaid_13.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..c2b5f8dbca353d95c5412fddf5e3a03bcd9b57e6
--- /dev/null
+++ b/test/mermaid/hard/mermaid_13.mmd
@@ -0,0 +1,134 @@
+graph LR
+    N0([start])
+    N1[Promotion Application]
+    N2[Shipment]
+    N3([Product Listing])
+    N4(Invoice Generation)
+    N5[Payment]
+    N6[/Up_selling Offer/]
+    N7[[Search Engine Optimization]]
+    N8(Loyalty Points)
+    N9[(Checkout)]
+    N10[Delivery Rescheduling]
+    N11[(Live Chat Support)]
+    N12[/Affiliate Marketing/]
+    N13[Fraud Detection]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Customer Segmentation
+        nest0_0(Refund Process)
+        nest0_1(Marketing Campaign Launch)
+        nest0_2[/Order Confirmation/]
+    end
+    subgraph Payment Gateway Reconciliation
+        nest1_0(Gift Card Purchase)
+        nest1_1(A or B Testing)
+        nest1_2(Supplier Onboarding)
+        nest1_3([Data Analytics Reporting])
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> |sorts| N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 -.-> N13
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N5 --> nest0_0
+    nest0_2 -.-> N12
+    nest1_0 --> |refunds| nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N5 --> nest1_0
+    nest1_3 --> N9
+    N1 --> S0
+    S0 --> N3
+    S0 --> N7
+    S0 --> N6
+    N0 -.-> S1
+    S1 -.-> N6
+    S1 -.-> N3
+    S1 --> |discounts| N7
+    S1 --> N5
+    N1 --> M0
+    N0 --> M0
+    M0 -.-> N3
+    N2 -.-> M1
+    N1 --> |bundles| M1
+    N0 --> M1
+    N3 --> M1
+    M1 -.-> N5
+    style N0 fill:#FFF6D9,stroke:#FFCC7A
+    style N1 fill:#FFFDE0,stroke:#FFF8A6
+    style N2 fill:#FFE0B2,stroke:#FF9800
+    style N3 fill:#FFF6D9,stroke:#FFCC7A
+    style N4 fill:#FFFDE0,stroke:#FFF8A6
+    style N5 fill:#FFE0B2,stroke:#FF9800
+    style N6 fill:#FFF6D9,stroke:#FFCC7A
+    style N7 fill:#FFFDE0,stroke:#FFF8A6
+    style N8 fill:#FFF6D9,stroke:#FFCC7A
+    style N9 fill:#FFF6D9,stroke:#FFCC7A
+    style N10 fill:#FFFDE0,stroke:#FFF8A6
+    style N11 fill:#FFF6D9,stroke:#FFCC7A
+    style N12 fill:#FFE0B2,stroke:#FF9800
+    style N13 fill:#FFE0B2,stroke:#FF9800
+    style S0 fill:#FFFDE0,stroke:#FFF8A6
+    style S1 fill:#FFFDE0,stroke:#FFF8A6
+    style M0 fill:#FFE0B2,stroke:#FF9800
+    style M1 fill:#FFE0B2,stroke:#FF9800
+    style nest0_0 fill:#FFF6D9,stroke:#FFCC7A
+    style nest0_1 fill:#FFE0B2,stroke:#FF9800
+    style nest0_2 fill:#FFF6D9,stroke:#FFCC7A
+    style nest1_0 fill:#FFF6D9,stroke:#FFCC7A
+    style nest1_1 fill:#FFFDE0,stroke:#FFF8A6
+    style nest1_2 fill:#FFE0B2,stroke:#FF9800
+    style nest1_3 fill:#FFF6D9,stroke:#FFCC7A
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#FFF8A6,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_13.txt b/test/mermaid/hard/mermaid_13.txt
new file mode 100644
index 0000000000000000000000000000000000000000..88eea7a789d1107f689458d5a873f8ce5d7017e8
--- /dev/null
+++ b/test/mermaid/hard/mermaid_13.txt
@@ -0,0 +1,39 @@
+<A or B Testing, connectedTo, Supplier Onboarding>
+<A or B Testing, partOf, Payment Gateway Reconciliation>
+<Affiliate Marketing, connectedTo, Fraud Detection>
+<Checkout, connectedTo, Delivery Rescheduling>
+<Data Analytics Reporting, connectedTo, Checkout>
+<Data Analytics Reporting, partOf, Payment Gateway Reconciliation>
+<Delivery Rescheduling, connectedTo, Live Chat Support>
+<Gift Card Purchase, partOf, Payment Gateway Reconciliation>
+<Gift Card Purchase, refunds, A or B Testing>
+<Invoice Generation, connectedTo, Payment>
+<Live Chat Support, connectedTo, Affiliate Marketing>
+<Loyalty Points, connectedTo, Checkout>
+<Marketing Campaign Launch, connectedTo, Order Confirmation>
+<Marketing Campaign Launch, partOf, Customer Segmentation>
+<Order Confirmation, connectedTo, Affiliate Marketing>
+<Order Confirmation, partOf, Customer Segmentation>
+<Payment, connectedTo, Gift Card Purchase>
+<Payment, connectedTo, Refund Process>
+<Payment, connectedTo, Up_selling Offer>
+<Product Listing, connectedTo, Invoice Generation>
+<Product Listing, connectedTo, Payment>
+<Promotion Application, bundles, Payment>
+<Promotion Application, connectedTo, Product Listing>
+<Promotion Application, connectedTo, Search Engine Optimization>
+<Promotion Application, connectedTo, Shipment>
+<Promotion Application, connectedTo, Up_selling Offer>
+<Refund Process, connectedTo, Marketing Campaign Launch>
+<Refund Process, partOf, Customer Segmentation>
+<Search Engine Optimization, connectedTo, Loyalty Points>
+<Shipment, connectedTo, Payment>
+<Shipment, sorts, Product Listing>
+<Supplier Onboarding, connectedTo, Data Analytics Reporting>
+<Supplier Onboarding, partOf, Payment Gateway Reconciliation>
+<Up_selling Offer, connectedTo, Search Engine Optimization>
+<start, connectedTo, Payment>
+<start, connectedTo, Product Listing>
+<start, connectedTo, Promotion Application>
+<start, connectedTo, Up_selling Offer>
+<start, discounts, Search Engine Optimization>
diff --git a/test/mermaid/hard/mermaid_130.txt b/test/mermaid/hard/mermaid_130.txt
new file mode 100644
index 0000000000000000000000000000000000000000..3f7072c4f92e43c75fb04ea24a094baf9c58bbf4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_130.txt
@@ -0,0 +1,35 @@
+<Advanced Sorting Technologies, connectedTo, End_of_Life Product Management>
+<Advanced Sorting Technologies, connectedTo, Hazardous Material Recovery>
+<Advanced Sorting Technologies, connectedTo, Material Purity Testing>
+<Advanced Sorting Technologies, connectedTo, Public Recycling Programs>
+<Battery Recycling, connectedTo, Plastic Recycling>
+<Battery Recycling, partOf, Material Collection>
+<Closed_Loop Material Flow, connectedTo, Battery Recycling>
+<Closed_Loop Material Flow, connectedTo, Hazardous Material Recovery>
+<Closed_Loop Material Flow, connectedTo, Paper Recycling>
+<Closed_Loop Material Flow, connectedTo, Public Recycling Programs>
+<Closed_Loop Material Flow, connectedTo, Waste Audit for Recycling>
+<Collection Point Management, connectedTo, Recycling Data Tracking>
+<Collection Point Management, partOf, Material Collection>
+<Hazardous Material Recovery, connectedTo, Public Recycling Programs>
+<Material Purity Testing, connectedTo, Recycling Infrastructure Development>
+<Material Purity Testing, partOf, Composting Organic Waste>
+<New Product Manufacturing, connectedTo, Advanced Sorting Technologies>
+<New Product Manufacturing, connectedTo, Closed_Loop Material Flow>
+<Paper Recycling, connectedTo, Advanced Sorting Technologies>
+<Plastic Recycling, connectedTo, Collection Point Management>
+<Plastic Recycling, partOf, Material Collection>
+<Product Design for Recyclability, connectedTo, Recycling Facility Optimization>
+<Product Design for Recyclability, partOf, Composting Organic Waste>
+<Public Recycling Programs, connectedTo, End_of_Life Product Management>
+<Recycling Data Tracking, connectedTo, Paper Recycling>
+<Recycling Facility Optimization, connectedTo, End_of_Life Product Management>
+<Recycling Facility Optimization, partOf, Composting Organic Waste>
+<Recycling Infrastructure Development, connectedTo, Product Design for Recyclability>
+<Recycling Infrastructure Development, partOf, Composting Organic Waste>
+<Tyre Recycling, connectedTo, Advanced Sorting Technologies>
+<Tyre Recycling, connectedTo, New Product Manufacturing>
+<Waste Audit for Recycling, connectedTo, Advanced Sorting Technologies>
+<Waste Audit for Recycling, connectedTo, End_of_Life Product Management>
+<Waste Audit for Recycling, connectedTo, Public Recycling Programs>
+<Waste Audit for Recycling, connectedTo, Recycling Data Tracking>
diff --git a/test/mermaid/hard/mermaid_131.mmd b/test/mermaid/hard/mermaid_131.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..e3b6192827b25dc4ce2fac222eb42786cbdeaf33
--- /dev/null
+++ b/test/mermaid/hard/mermaid_131.mmd
@@ -0,0 +1,110 @@
+graph TD
+    N0([Industrial Recycling Programs])
+    N1[(Hazardous Material Recovery)]
+    N2[[Commercial Recycling Solutions]]
+    N3(Waste Audit for Recycling)
+    N4{Metal Recycling}
+    N5{Circular Economy Implementation}
+    N6[(Material Collection)]
+    N7(Chemical Recycling)
+    N8([Glass Recycling])
+    N9[Recycling Market Development]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    subgraph Textile Recycling
+        nest0_0{Material Purity Testing}
+        nest0_1{Advanced Sorting Technologies}
+        nest0_2[Recycling Infrastructure Development]
+        nest0_3[/Plastic Recycling/]
+    end
+    subgraph New Product Manufacturing
+        nest1_0[[Recycling Policy Advocacy]]
+        nest1_1(Life Cycle Assessment)
+        nest1_2[[Product Design for Recyclability]]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N6 --> nest0_0
+    nest0_3 --> N7
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N1 --> nest1_0
+    nest1_2 --> N4
+    N2 --> S0
+    S0 -.-> N8
+    S0 -.-> N5
+    N0 --> S1
+    S1 --> N5
+    S1 -.-> N7
+    N6 -.-> S2
+    S2 --> |certifies| N9
+    S2 --> N8
+    N4 -.-> M0
+    N2 -.-> M0
+    N1 -.-> M0
+    M0 -.-> N7
+    style N0 fill:#D7CCC8,stroke:#795548
+    style N1 fill:#DED7F0,stroke:#A188DB
+    style N2 fill:#DED7F0,stroke:#A188DB
+    style N3 fill:#DED7F0,stroke:#A188DB
+    style N4 fill:#FFDCD6,stroke:#FFB2A5
+    style N5 fill:#D7CCC8,stroke:#795548
+    style N6 fill:#FFDCD6,stroke:#FFB2A5
+    style N7 fill:#DED7F0,stroke:#A188DB
+    style N8 fill:#DED7F0,stroke:#A188DB
+    style N9 fill:#D7CCC8,stroke:#795548
+    style S0 fill:#DED7F0,stroke:#A188DB
+    style S1 fill:#DED7F0,stroke:#A188DB
+    style S2 fill:#FFDCD6,stroke:#FFB2A5
+    style M0 fill:#D7CCC8,stroke:#795548
+    style nest0_0 fill:#FFDCD6,stroke:#FFB2A5
+    style nest0_1 fill:#FFDCD6,stroke:#FFB2A5
+    style nest0_2 fill:#FFDCD6,stroke:#FFB2A5
+    style nest0_3 fill:#DED7F0,stroke:#A188DB
+    style nest1_0 fill:#DED7F0,stroke:#A188DB
+    style nest1_1 fill:#FFDCD6,stroke:#FFB2A5
+    style nest1_2 fill:#DED7F0,stroke:#A188DB
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A188DB,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_131.txt b/test/mermaid/hard/mermaid_131.txt
new file mode 100644
index 0000000000000000000000000000000000000000..90c9e43bc5fd3a5e57033ff68502ed39f6df8459
--- /dev/null
+++ b/test/mermaid/hard/mermaid_131.txt
@@ -0,0 +1,34 @@
+<Advanced Sorting Technologies, connectedTo, Recycling Infrastructure Development>
+<Advanced Sorting Technologies, partOf, Textile Recycling>
+<Chemical Recycling, connectedTo, Glass Recycling>
+<Circular Economy Implementation, connectedTo, Material Collection>
+<Commercial Recycling Solutions, connectedTo, Chemical Recycling>
+<Commercial Recycling Solutions, connectedTo, Circular Economy Implementation>
+<Commercial Recycling Solutions, connectedTo, Glass Recycling>
+<Commercial Recycling Solutions, connectedTo, Waste Audit for Recycling>
+<Glass Recycling, connectedTo, Recycling Market Development>
+<Hazardous Material Recovery, connectedTo, Chemical Recycling>
+<Hazardous Material Recovery, connectedTo, Commercial Recycling Solutions>
+<Hazardous Material Recovery, connectedTo, Recycling Policy Advocacy>
+<Industrial Recycling Programs, connectedTo, Chemical Recycling>
+<Industrial Recycling Programs, connectedTo, Circular Economy Implementation>
+<Industrial Recycling Programs, connectedTo, Hazardous Material Recovery>
+<Life Cycle Assessment, connectedTo, Product Design for Recyclability>
+<Life Cycle Assessment, partOf, New Product Manufacturing>
+<Material Collection, certifies, Recycling Market Development>
+<Material Collection, connectedTo, Chemical Recycling>
+<Material Collection, connectedTo, Glass Recycling>
+<Material Collection, connectedTo, Material Purity Testing>
+<Material Purity Testing, connectedTo, Advanced Sorting Technologies>
+<Material Purity Testing, partOf, Textile Recycling>
+<Metal Recycling, connectedTo, Chemical Recycling>
+<Metal Recycling, connectedTo, Circular Economy Implementation>
+<Plastic Recycling, connectedTo, Chemical Recycling>
+<Plastic Recycling, partOf, Textile Recycling>
+<Product Design for Recyclability, connectedTo, Metal Recycling>
+<Product Design for Recyclability, partOf, New Product Manufacturing>
+<Recycling Infrastructure Development, connectedTo, Plastic Recycling>
+<Recycling Infrastructure Development, partOf, Textile Recycling>
+<Recycling Policy Advocacy, connectedTo, Life Cycle Assessment>
+<Recycling Policy Advocacy, partOf, New Product Manufacturing>
+<Waste Audit for Recycling, connectedTo, Metal Recycling>
diff --git a/test/mermaid/hard/mermaid_132.mmd b/test/mermaid/hard/mermaid_132.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..ad4506339afadc41515863c34ae3a85e52fc9d13
--- /dev/null
+++ b/test/mermaid/hard/mermaid_132.mmd
@@ -0,0 +1,130 @@
+graph RL
+    N0([Battery Recycling])
+    N1[Cleaning and Processing]
+    N2([Recycling Data Tracking])
+    N3(Contamination Reduction)
+    N4{Textile Recycling}
+    N5(End_of_Life Product Management)
+    N6[[Material Collection]]
+    N7(Mechanical Recycling)
+    N8[Recycling Facility Optimization]
+    N9(Industrial Recycling Programs)
+    N10{Closed_Loop Material Flow}
+    N11(Recycling Market Development)
+    N12([Advanced Sorting Technologies])
+    N13(Recycling Education)
+    N14[(Glass Recycling)]
+    N15[(Deposit_Return Schemes)]
+    N16(Product Design for Recyclability)
+    N17([Composting Organic Waste])
+    N18([end])
+    S0(( ))
+    S1(( ))
+    M1(( ))
+    subgraph Metal Recycling
+        nest0_0[Chemical Recycling]
+        nest0_1[(Commercial Recycling Solutions)]
+    end
+    subgraph Waste Stream Analysis
+        nest1_0{Tyre Recycling}
+        nest1_1[Recycling Policy Advocacy]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> |measures| N14
+    N14 --> N15
+    N15 --> N16
+    N16 --> N17
+    N17 -.-> N18
+    nest0_0 --> nest0_1
+    N13 --> nest0_0
+    nest0_1 -.-> N3
+    nest1_0 -.-> nest1_1
+    N15 -.-> nest1_0
+    nest1_1 --> N13
+    N5 -.-> S0
+    S0 -.-> N14
+    S0 -.-> N16
+    S0 --> N10
+    N13 -.-> S1
+    S1 -.-> N16
+    S1 --> |collects| N15
+    S1 --> |reuses| N17
+    N2 -.-> M1
+    N0 --> |treats| M1
+    N4 --> M1
+    M1 --> N6
+    style N0 fill:#F9FBE7,stroke:#DCE775
+    style N1 fill:#F9FBE7,stroke:#DCE775
+    style N2 fill:#D0E0F8,stroke:#4285F4
+    style N3 fill:#F9FBE7,stroke:#DCE775
+    style N4 fill:#D0E0F8,stroke:#4285F4
+    style N5 fill:#F9FBE7,stroke:#DCE775
+    style N6 fill:#D0E0F8,stroke:#4285F4
+    style N7 fill:#D0E0F8,stroke:#4285F4
+    style N8 fill:#F9FBE7,stroke:#DCE775
+    style N9 fill:#F3E5F5,stroke:#AB47BC
+    style N10 fill:#D0E0F8,stroke:#4285F4
+    style N11 fill:#D0E0F8,stroke:#4285F4
+    style N12 fill:#F9FBE7,stroke:#DCE775
+    style N13 fill:#D0E0F8,stroke:#4285F4
+    style N14 fill:#F9FBE7,stroke:#DCE775
+    style N15 fill:#D0E0F8,stroke:#4285F4
+    style N16 fill:#F9FBE7,stroke:#DCE775
+    style N17 fill:#F9FBE7,stroke:#DCE775
+    style N18 fill:#D0E0F8,stroke:#4285F4
+    style S0 fill:#F3E5F5,stroke:#AB47BC
+    style S1 fill:#D0E0F8,stroke:#4285F4
+    style M1 fill:#D0E0F8,stroke:#4285F4
+    style nest0_0 fill:#D0E0F8,stroke:#4285F4
+    style nest0_1 fill:#F9FBE7,stroke:#DCE775
+    style nest1_0 fill:#F9FBE7,stroke:#DCE775
+    style nest1_1 fill:#F9FBE7,stroke:#DCE775
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_132.txt b/test/mermaid/hard/mermaid_132.txt
new file mode 100644
index 0000000000000000000000000000000000000000..12871a51007a169d88b311442218d51be99964ac
--- /dev/null
+++ b/test/mermaid/hard/mermaid_132.txt
@@ -0,0 +1,37 @@
+<Advanced Sorting Technologies, connectedTo, Recycling Education>
+<Battery Recycling, connectedTo, Cleaning and Processing>
+<Battery Recycling, treats, Material Collection>
+<Chemical Recycling, connectedTo, Commercial Recycling Solutions>
+<Chemical Recycling, partOf, Metal Recycling>
+<Cleaning and Processing, connectedTo, Recycling Data Tracking>
+<Closed_Loop Material Flow, connectedTo, Recycling Market Development>
+<Commercial Recycling Solutions, connectedTo, Contamination Reduction>
+<Commercial Recycling Solutions, partOf, Metal Recycling>
+<Composting Organic Waste, connectedTo, end>
+<Contamination Reduction, connectedTo, Textile Recycling>
+<Deposit_Return Schemes, connectedTo, Product Design for Recyclability>
+<Deposit_Return Schemes, connectedTo, Tyre Recycling>
+<End_of_Life Product Management, connectedTo, Closed_Loop Material Flow>
+<End_of_Life Product Management, connectedTo, Glass Recycling>
+<End_of_Life Product Management, connectedTo, Material Collection>
+<End_of_Life Product Management, connectedTo, Product Design for Recyclability>
+<Glass Recycling, connectedTo, Deposit_Return Schemes>
+<Industrial Recycling Programs, connectedTo, Closed_Loop Material Flow>
+<Material Collection, connectedTo, Mechanical Recycling>
+<Mechanical Recycling, connectedTo, Recycling Facility Optimization>
+<Product Design for Recyclability, connectedTo, Composting Organic Waste>
+<Recycling Data Tracking, connectedTo, Contamination Reduction>
+<Recycling Data Tracking, connectedTo, Material Collection>
+<Recycling Education, collects, Deposit_Return Schemes>
+<Recycling Education, connectedTo, Chemical Recycling>
+<Recycling Education, connectedTo, Product Design for Recyclability>
+<Recycling Education, measures, Glass Recycling>
+<Recycling Education, reuses, Composting Organic Waste>
+<Recycling Facility Optimization, connectedTo, Industrial Recycling Programs>
+<Recycling Market Development, connectedTo, Advanced Sorting Technologies>
+<Recycling Policy Advocacy, connectedTo, Recycling Education>
+<Recycling Policy Advocacy, partOf, Waste Stream Analysis>
+<Textile Recycling, connectedTo, End_of_Life Product Management>
+<Textile Recycling, connectedTo, Material Collection>
+<Tyre Recycling, connectedTo, Recycling Policy Advocacy>
+<Tyre Recycling, partOf, Waste Stream Analysis>
diff --git a/test/mermaid/hard/mermaid_133.mmd b/test/mermaid/hard/mermaid_133.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..b17759d53c2ce5ebadb0140645a7f1efc468f510
--- /dev/null
+++ b/test/mermaid/hard/mermaid_133.mmd
@@ -0,0 +1,109 @@
+graph RL
+    N0([start])
+    N1[(Recreation Management)]
+    N2([Soil Conservation])
+    N3[[Forestry Equipment Maintenance]]
+    N4{Urban Forestry Management}
+    N5[[Ecological Restoration]]
+    N6(Pest and Disease Control)
+    N7(Timber Harvesting)
+    N8[(Watershed Protection)]
+    N9[[Forest Carbon Accounting]]
+    N10{Afforestation}
+    N11{Wood Product Manufacturing}
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Climate Change Adaptation in Forests
+        nest0_0(Agroforestry Systems)
+        nest0_1[/Public Access Management/]
+        nest0_2[Drone Surveying for Forests]
+        nest0_3(Carbon Sequestration Monitoring)
+    end
+    subgraph Erosion Control
+        nest1_0[Reforestation]
+        nest1_1[Sawmill Processing]
+        nest1_2(Tree Nursery Management)
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> |no| N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N10 --> nest0_0
+    nest0_3 --> N7
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N6 -.-> nest1_0
+    nest1_2 -.-> N9
+    N7 --> S0
+    S0 -.-> N11
+    S0 --> N10
+    N0 --> S1
+    S1 --> N3
+    S1 -.-> N2
+    S1 -.-> N4
+    N7 -.-> M0
+    N1 --> M0
+    N0 -.-> M0
+    M0 --> N9
+    N1 -.-> M1
+    N0 --> M1
+    M1 --> N3
+    N0 --> M2
+    N1 -.-> |yes| M2
+    M2 -.-> N3
+    style S0 fill:#F6F6F6,stroke:#CFCFCF
+    style S1 fill:#DACBE3,stroke:#A188D0
+    style M0 fill:#DACBE3,stroke:#A188D0
+    style M1 fill:#F6F6F6,stroke:#CFCFCF
+    style M2 fill:#FFCCBC,stroke:#FF5722
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#A188D0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_134.mmd b/test/mermaid/hard/mermaid_134.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..1fe1ac6566f288de7630ea1c0b287720602c495d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_134.mmd
@@ -0,0 +1,88 @@
+graph BT
+    N0([Recreation Management])
+    N1[[Soil Conservation]]
+    N2[(Forest Inventory)]
+    N3[(Reforestation)]
+    N4[[GIS Mapping for Forestry]]
+    N5[/Logging Operations/]
+    N6[[Ecological Restoration]]
+    N7(Erosion Control)
+    N8[[Forest Road Construction]]
+    S1(( ))
+    M2(( ))
+    subgraph Public Access Management
+        nest0_0[Forestry Education]
+        nest0_1[Drone Surveying for Forests]
+    end
+    subgraph Timber Harvesting
+        nest1_0[/Forest Research/]
+        nest1_1{Carbon Sequestration Monitoring}
+        nest1_2([Biomass Production from Forests])
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> |protects| N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    nest0_0 -.-> nest0_1
+    N2 -.-> nest0_0
+    nest0_1 -.-> N6
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N2 --> nest1_0
+    nest1_2 -.-> N1
+    N0 --> S1
+    S1 -.-> N6
+    S1 -.-> |treats| N5
+    S1 -.-> N7
+    N0 --> M2
+    N1 -.-> |processes| M2
+    N2 -.-> M2
+    M2 -.-> N5
+    N0 --> N2
+    N4 -.-> N3
+    style N0 fill:#D1C4E9,stroke:#7E57C2
+    style N1 fill:#B2EBF2,stroke:#00BCD4
+    style N2 fill:#B2EBF2,stroke:#00BCD4
+    style N3 fill:#F0F4C3,stroke:#AED581
+    style N4 fill:#D1C4E9,stroke:#7E57C2
+    style N5 fill:#D1C4E9,stroke:#7E57C2
+    style N6 fill:#F0F4C3,stroke:#AED581
+    style N7 fill:#F0F4C3,stroke:#AED581
+    style N8 fill:#D1C4E9,stroke:#7E57C2
+    style S1 fill:#B2EBF2,stroke:#00BCD4
+    style M2 fill:#B2EBF2,stroke:#00BCD4
+    style nest0_0 fill:#B2EBF2,stroke:#00BCD4
+    style nest0_1 fill:#B2EBF2,stroke:#00BCD4
+    style nest1_0 fill:#D1C4E9,stroke:#7E57C2
+    style nest1_1 fill:#B2EBF2,stroke:#00BCD4
+    style nest1_2 fill:#B2EBF2,stroke:#00BCD4
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#7E57C2,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_135.mmd b/test/mermaid/hard/mermaid_135.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..c93a4c191b9b55e15d31eff52eb195a88edf74f2
--- /dev/null
+++ b/test/mermaid/hard/mermaid_135.mmd
@@ -0,0 +1,122 @@
+graph RL
+    N0([start])
+    N1[[Forest Carbon Accounting]]
+    N2[Forest Health Monitoring]
+    N3[Drone Surveying for Forests]
+    N4(Reforestation)
+    N5(Biodiversity Conservation in Forests)
+    N6[(Timber Harvesting)]
+    N7[Forest Land Use Planning]
+    N8(Forestry Equipment Maintenance)
+    N9{Pest and Disease Control}
+    N10[Urban Forestry Management]
+    N11(Forest Fire Management)
+    N12[Public Access Management]
+    N13[(Sawmill Processing)]
+    N14[(Agroforestry Systems)]
+    N15([end])
+    S0(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Biomass Production from Forests
+        nest0_0(Forestry Policy Development)
+        nest0_1[Illegal Logging Prevention]
+        nest0_2[[Tree Planting]]
+    end
+    subgraph Indigenous Forestry Practices
+        nest1_0[Soil Conservation]
+        nest1_1[Forestry Education]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> N12
+    N12 --> N13
+    N13 --> N14
+    N14 -.-> N15
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N7 -.-> nest0_0
+    nest0_2 -.-> N15
+    nest1_0 -.-> nest1_1
+    N12 --> nest1_0
+    nest1_1 --> N9
+    N12 --> S0
+    S0 --> N15
+    S0 -.-> N14
+    N7 -.-> M0
+    N9 --> M0
+    N10 -.-> M0
+    M0 -.-> N13
+    N1 -.-> M1
+    N0 --> M1
+    N2 --> M1
+    N4 -.-> M1
+    M1 --> N6
+    style N0 fill:#E1BEE7,stroke:#9C27B0
+    style N1 fill:#ECCFF5,stroke:#CD8FF2
+    style N2 fill:#FFDCD6,stroke:#FFB2A5
+    style N3 fill:#ECCFF5,stroke:#CD8FF2
+    style N4 fill:#ECCFF5,stroke:#CD8FF2
+    style N5 fill:#FFDCD6,stroke:#FFB2A5
+    style N6 fill:#FFDCD6,stroke:#FFB2A5
+    style N7 fill:#FFDCD6,stroke:#FFB2A5
+    style N8 fill:#E1BEE7,stroke:#9C27B0
+    style N9 fill:#E1BEE7,stroke:#9C27B0
+    style N10 fill:#FFDCD6,stroke:#FFB2A5
+    style N11 fill:#E1BEE7,stroke:#9C27B0
+    style N12 fill:#ECCFF5,stroke:#CD8FF2
+    style N13 fill:#E1BEE7,stroke:#9C27B0
+    style N14 fill:#ECCFF5,stroke:#CD8FF2
+    style N15 fill:#FFDCD6,stroke:#FFB2A5
+    style S0 fill:#FFDCD6,stroke:#FFB2A5
+    style M0 fill:#FFDCD6,stroke:#FFB2A5
+    style M1 fill:#ECCFF5,stroke:#CD8FF2
+    style nest0_0 fill:#FFDCD6,stroke:#FFB2A5
+    style nest0_1 fill:#ECCFF5,stroke:#CD8FF2
+    style nest0_2 fill:#ECCFF5,stroke:#CD8FF2
+    style nest1_0 fill:#ECCFF5,stroke:#CD8FF2
+    style nest1_1 fill:#ECCFF5,stroke:#CD8FF2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFB2A5,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_135.txt b/test/mermaid/hard/mermaid_135.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0c527e117ec8635f93479de638d48966c75653d0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_135.txt
@@ -0,0 +1,36 @@
+<Agroforestry Systems, connectedTo, end>
+<Biodiversity Conservation in Forests, connectedTo, Timber Harvesting>
+<Drone Surveying for Forests, connectedTo, Reforestation>
+<Forest Carbon Accounting, connectedTo, Forest Health Monitoring>
+<Forest Carbon Accounting, connectedTo, Timber Harvesting>
+<Forest Fire Management, connectedTo, Public Access Management>
+<Forest Health Monitoring, connectedTo, Drone Surveying for Forests>
+<Forest Health Monitoring, connectedTo, Timber Harvesting>
+<Forest Land Use Planning, connectedTo, Forestry Equipment Maintenance>
+<Forest Land Use Planning, connectedTo, Forestry Policy Development>
+<Forest Land Use Planning, connectedTo, Sawmill Processing>
+<Forestry Education, connectedTo, Pest and Disease Control>
+<Forestry Education, partOf, Indigenous Forestry Practices>
+<Forestry Equipment Maintenance, connectedTo, Pest and Disease Control>
+<Forestry Policy Development, connectedTo, Illegal Logging Prevention>
+<Forestry Policy Development, partOf, Biomass Production from Forests>
+<Illegal Logging Prevention, connectedTo, Tree Planting>
+<Illegal Logging Prevention, partOf, Biomass Production from Forests>
+<Pest and Disease Control, connectedTo, Sawmill Processing>
+<Pest and Disease Control, connectedTo, Urban Forestry Management>
+<Public Access Management, connectedTo, Agroforestry Systems>
+<Public Access Management, connectedTo, Sawmill Processing>
+<Public Access Management, connectedTo, Soil Conservation>
+<Public Access Management, connectedTo, end>
+<Reforestation, connectedTo, Biodiversity Conservation in Forests>
+<Reforestation, connectedTo, Timber Harvesting>
+<Sawmill Processing, connectedTo, Agroforestry Systems>
+<Soil Conservation, connectedTo, Forestry Education>
+<Soil Conservation, partOf, Indigenous Forestry Practices>
+<Timber Harvesting, connectedTo, Forest Land Use Planning>
+<Tree Planting, connectedTo, end>
+<Tree Planting, partOf, Biomass Production from Forests>
+<Urban Forestry Management, connectedTo, Forest Fire Management>
+<Urban Forestry Management, connectedTo, Sawmill Processing>
+<start, connectedTo, Forest Carbon Accounting>
+<start, connectedTo, Timber Harvesting>
diff --git a/test/mermaid/hard/mermaid_136.mmd b/test/mermaid/hard/mermaid_136.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..7a1aa9220ef9b5cc18dcc27556dc514dc1733af9
--- /dev/null
+++ b/test/mermaid/hard/mermaid_136.mmd
@@ -0,0 +1,122 @@
+graph LR
+    N0([start])
+    N1[[Laboratory Testing]]
+    N2(Livestock Disease Prevention)
+    N3[Pre_surgical Assessment]
+    N4[Hospice Care for Animals]
+    N5(Veterinary Pathology)
+    N6([Anesthesia Administration])
+    N7[[Animal Sheltering Consultation]]
+    N8[[Reproductive Services]]
+    N9[(Spay or Neuter Procedure)]
+    N10[/Diagnosis/]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Medical Record Keeping
+        nest0_0(Emergency Vet Services)
+        nest0_1{Imaging Services}
+        nest0_2(Dental Care)
+    end
+    subgraph Veterinary Technology Training
+        nest1_0(Public Health Vet Services)
+        nest1_1[[Vaccination]]
+        nest1_2[/Genetic Counseling for Animals/]
+        nest1_3[Microchipping]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> |reproduces| N9
+    N9 -.-> |recommends| N10
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N6 -.-> nest0_0
+    nest0_2 --> N2
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> |anesthetizes| nest1_3
+    N1 --> nest1_0
+    nest1_3 --> N6
+    N6 -.-> S0
+    S0 -.-> N8
+    S0 -.-> N9
+    N0 -.-> S1
+    S1 --> N10
+    S1 --> N7
+    N4 -.-> S2
+    S2 --> N9
+    S2 --> N10
+    N4 -.-> M0
+    N3 --> M0
+    N0 -.-> M0
+    M0 --> N6
+    N1 -.-> M1
+    N0 --> M1
+    M1 --> N3
+    style N0 fill:#EDF5F3,stroke:#A1D7CD
+    style N1 fill:#D6D9F0,stroke:#9FA9E1
+    style N2 fill:#E6EE9C,stroke:#CDDC39
+    style N3 fill:#D6D9F0,stroke:#9FA9E1
+    style N4 fill:#E6EE9C,stroke:#CDDC39
+    style N5 fill:#D6D9F0,stroke:#9FA9E1
+    style N6 fill:#D6D9F0,stroke:#9FA9E1
+    style N7 fill:#E6EE9C,stroke:#CDDC39
+    style N8 fill:#EDF5F3,stroke:#A1D7CD
+    style N9 fill:#D6D9F0,stroke:#9FA9E1
+    style N10 fill:#EDF5F3,stroke:#A1D7CD
+    style S0 fill:#D6D9F0,stroke:#9FA9E1
+    style S1 fill:#D6D9F0,stroke:#9FA9E1
+    style S2 fill:#E6EE9C,stroke:#CDDC39
+    style M0 fill:#D6D9F0,stroke:#9FA9E1
+    style M1 fill:#EDF5F3,stroke:#A1D7CD
+    style nest0_0 fill:#E6EE9C,stroke:#CDDC39
+    style nest0_1 fill:#EDF5F3,stroke:#A1D7CD
+    style nest0_2 fill:#E6EE9C,stroke:#CDDC39
+    style nest1_0 fill:#D6D9F0,stroke:#9FA9E1
+    style nest1_1 fill:#E6EE9C,stroke:#CDDC39
+    style nest1_2 fill:#D6D9F0,stroke:#9FA9E1
+    style nest1_3 fill:#E6EE9C,stroke:#CDDC39
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#CDDC39,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_136.txt b/test/mermaid/hard/mermaid_136.txt
new file mode 100644
index 0000000000000000000000000000000000000000..cc7f758fb5edbb95b99cd6f5b51825211cd4fe63
--- /dev/null
+++ b/test/mermaid/hard/mermaid_136.txt
@@ -0,0 +1,37 @@
+<Anesthesia Administration, connectedTo, Animal Sheltering Consultation>
+<Anesthesia Administration, connectedTo, Emergency Vet Services>
+<Anesthesia Administration, connectedTo, Reproductive Services>
+<Anesthesia Administration, connectedTo, Spay or Neuter Procedure>
+<Animal Sheltering Consultation, connectedTo, Reproductive Services>
+<Dental Care, connectedTo, Livestock Disease Prevention>
+<Dental Care, partOf, Medical Record Keeping>
+<Emergency Vet Services, connectedTo, Imaging Services>
+<Emergency Vet Services, partOf, Medical Record Keeping>
+<Genetic Counseling for Animals, anesthetizes, Microchipping>
+<Genetic Counseling for Animals, partOf, Veterinary Technology Training>
+<Hospice Care for Animals, connectedTo, Anesthesia Administration>
+<Hospice Care for Animals, connectedTo, Diagnosis>
+<Hospice Care for Animals, connectedTo, Spay or Neuter Procedure>
+<Hospice Care for Animals, connectedTo, Veterinary Pathology>
+<Imaging Services, connectedTo, Dental Care>
+<Imaging Services, partOf, Medical Record Keeping>
+<Laboratory Testing, connectedTo, Livestock Disease Prevention>
+<Laboratory Testing, connectedTo, Pre_surgical Assessment>
+<Laboratory Testing, connectedTo, Public Health Vet Services>
+<Livestock Disease Prevention, connectedTo, Pre_surgical Assessment>
+<Microchipping, connectedTo, Anesthesia Administration>
+<Microchipping, partOf, Veterinary Technology Training>
+<Pre_surgical Assessment, connectedTo, Anesthesia Administration>
+<Pre_surgical Assessment, connectedTo, Hospice Care for Animals>
+<Public Health Vet Services, connectedTo, Vaccination>
+<Public Health Vet Services, partOf, Veterinary Technology Training>
+<Reproductive Services, reproduces, Spay or Neuter Procedure>
+<Spay or Neuter Procedure, recommends, Diagnosis>
+<Vaccination, connectedTo, Genetic Counseling for Animals>
+<Vaccination, partOf, Veterinary Technology Training>
+<Veterinary Pathology, connectedTo, Anesthesia Administration>
+<start, connectedTo, Anesthesia Administration>
+<start, connectedTo, Animal Sheltering Consultation>
+<start, connectedTo, Diagnosis>
+<start, connectedTo, Laboratory Testing>
+<start, connectedTo, Pre_surgical Assessment>
diff --git a/test/mermaid/hard/mermaid_137.mmd b/test/mermaid/hard/mermaid_137.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..446f8dd2d4898cac436cb08a09cb9a1cfd289106
--- /dev/null
+++ b/test/mermaid/hard/mermaid_137.mmd
@@ -0,0 +1,92 @@
+graph RL
+    N0([Hospice Care for Animals])
+    N1[[Post_operative Care]]
+    N2[Sterilization Protocols]
+    N3([Genetic Counseling for Animals])
+    N4[Behavioral Counseling]
+    N5[Biosecurity Measures]
+    N6[(Vaccination)]
+    N7[Anesthesia Administration]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    subgraph Parasite Control
+        nest0_0[/Herd Health Programs/]
+        nest0_1{Medical Treatment}
+        nest0_2[/Microchipping/]
+        nest0_3{Euthanasia Services}
+    end
+    subgraph Spay or Neuter Procedure
+        nest1_0[(Prescription)]
+        nest1_1[Laboratory Testing]
+        nest1_2[Wildlife Rehabilitation]
+    end
+    N0 --> |cleans| N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N1 --> nest0_0
+    nest0_3 --> N2
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N4 -.-> nest1_0
+    nest1_2 --> |communicates| N2
+    N0 -.-> S0
+    S0 --> N2
+    S0 -.-> N7
+    N1 --> S1
+    S1 --> N6
+    S1 -.-> |performs| N4
+    N4 -.-> S2
+    S2 --> N6
+    S2 -.-> N7
+    style N0 fill:#DFE7EB,stroke:#B0C5CD
+    style N1 fill:#B3E5FC,stroke:#03A9F4
+    style N2 fill:#DFE7EB,stroke:#B0C5CD
+    style N3 fill:#DFE7EB,stroke:#B0C5CD
+    style N4 fill:#DFE7EB,stroke:#B0C5CD
+    style N5 fill:#D0E0F8,stroke:#4285F4
+    style N6 fill:#DFE7EB,stroke:#B0C5CD
+    style N7 fill:#B3E5FC,stroke:#03A9F4
+    style S0 fill:#D0E0F8,stroke:#4285F4
+    style S1 fill:#B3E5FC,stroke:#03A9F4
+    style S2 fill:#DFE7EB,stroke:#B0C5CD
+    style nest0_0 fill:#DFE7EB,stroke:#B0C5CD
+    style nest0_1 fill:#D0E0F8,stroke:#4285F4
+    style nest0_2 fill:#DFE7EB,stroke:#B0C5CD
+    style nest0_3 fill:#D0E0F8,stroke:#4285F4
+    style nest1_0 fill:#D0E0F8,stroke:#4285F4
+    style nest1_1 fill:#D0E0F8,stroke:#4285F4
+    style nest1_2 fill:#B3E5FC,stroke:#03A9F4
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#B0C5CD,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_137.txt b/test/mermaid/hard/mermaid_137.txt
new file mode 100644
index 0000000000000000000000000000000000000000..4d2c6a95999a0e74f8ccaa2f56411759d2a97574
--- /dev/null
+++ b/test/mermaid/hard/mermaid_137.txt
@@ -0,0 +1,29 @@
+<Behavioral Counseling, connectedTo, Anesthesia Administration>
+<Behavioral Counseling, connectedTo, Biosecurity Measures>
+<Behavioral Counseling, connectedTo, Prescription>
+<Behavioral Counseling, connectedTo, Vaccination>
+<Biosecurity Measures, connectedTo, Vaccination>
+<Euthanasia Services, connectedTo, Sterilization Protocols>
+<Euthanasia Services, partOf, Parasite Control>
+<Genetic Counseling for Animals, connectedTo, Behavioral Counseling>
+<Herd Health Programs, connectedTo, Medical Treatment>
+<Herd Health Programs, partOf, Parasite Control>
+<Hospice Care for Animals, cleans, Post_operative Care>
+<Hospice Care for Animals, connectedTo, Anesthesia Administration>
+<Hospice Care for Animals, connectedTo, Sterilization Protocols>
+<Laboratory Testing, connectedTo, Wildlife Rehabilitation>
+<Laboratory Testing, partOf, Spay or Neuter Procedure>
+<Medical Treatment, connectedTo, Microchipping>
+<Medical Treatment, partOf, Parasite Control>
+<Microchipping, connectedTo, Euthanasia Services>
+<Microchipping, partOf, Parasite Control>
+<Post_operative Care, connectedTo, Herd Health Programs>
+<Post_operative Care, connectedTo, Sterilization Protocols>
+<Post_operative Care, connectedTo, Vaccination>
+<Post_operative Care, performs, Behavioral Counseling>
+<Prescription, connectedTo, Laboratory Testing>
+<Prescription, partOf, Spay or Neuter Procedure>
+<Sterilization Protocols, connectedTo, Genetic Counseling for Animals>
+<Vaccination, connectedTo, Anesthesia Administration>
+<Wildlife Rehabilitation, communicates, Sterilization Protocols>
+<Wildlife Rehabilitation, partOf, Spay or Neuter Procedure>
diff --git a/test/mermaid/hard/mermaid_139.mmd b/test/mermaid/hard/mermaid_139.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..61f5f9de17da8ff40353571598c701c1db87e460
--- /dev/null
+++ b/test/mermaid/hard/mermaid_139.mmd
@@ -0,0 +1,106 @@
+graph RL
+    N0([start])
+    N1[Nutritional Meal Preparation]
+    N2[Early Literacy Programs]
+    N3[/Preschool Education/]
+    N4[(Diaper Changing)]
+    N5[Parent_Teacher Conferences]
+    N6{Parent Communication}
+    N7[Childcare Facility Licensing]
+    N8{Nap Time Supervision}
+    N9(Safety Supervision)
+    N10[Child Protection Policies]
+    S0(( ))
+    S1(( ))
+    M1(( ))
+    subgraph Field Trip Organization
+        nest0_0(Individualized Attention)
+        nest0_1[(After_School Programs)]
+        nest0_2[Learning Material Selection]
+        nest0_3[(Emergency Evacuation Drills)]
+    end
+    subgraph Staff Training and Certification
+        nest1_0[(Infant Care)]
+        nest1_1[Potty Training Assistance]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> |develops| N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N6 --> nest0_0
+    nest0_3 --> N6
+    nest1_0 --> nest1_1
+    N8 -.-> nest1_0
+    nest1_1 --> |observes| N1
+    N1 --> S0
+    S0 --> N4
+    S0 --> N7
+    S0 -.-> N3
+    N5 --> S1
+    S1 -.-> N8
+    S1 -.-> |accommodates| N7
+    S1 -.-> |advises| N9
+    N4 --> M1
+    N0 --> M1
+    N3 -.-> M1
+    M1 --> N6
+    style N0 fill:#E6EE9C,stroke:#CDDC39
+    style N1 fill:#FCFCE7,stroke:#DCE775
+    style N2 fill:#BBDEFB,stroke:#2196F3
+    style N3 fill:#E6EE9C,stroke:#CDDC39
+    style N4 fill:#FCFCE7,stroke:#DCE775
+    style N5 fill:#FCFCE7,stroke:#DCE775
+    style N6 fill:#BBDEFB,stroke:#2196F3
+    style N7 fill:#FCFCE7,stroke:#DCE775
+    style N8 fill:#E6EE9C,stroke:#CDDC39
+    style N9 fill:#E6EE9C,stroke:#CDDC39
+    style N10 fill:#E6EE9C,stroke:#CDDC39
+    style S0 fill:#FCFCE7,stroke:#DCE775
+    style S1 fill:#BBDEFB,stroke:#2196F3
+    style M1 fill:#FCFCE7,stroke:#DCE775
+    style nest0_0 fill:#BBDEFB,stroke:#2196F3
+    style nest0_1 fill:#BBDEFB,stroke:#2196F3
+    style nest0_2 fill:#FCFCE7,stroke:#DCE775
+    style nest0_3 fill:#E6EE9C,stroke:#CDDC39
+    style nest1_0 fill:#FCFCE7,stroke:#DCE775
+    style nest1_1 fill:#BBDEFB,stroke:#2196F3
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#CDDC39,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_139.txt b/test/mermaid/hard/mermaid_139.txt
new file mode 100644
index 0000000000000000000000000000000000000000..05b9d8d60ca0dad952d92685323fcc2b46b9444f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_139.txt
@@ -0,0 +1,33 @@
+<After_School Programs, connectedTo, Learning Material Selection>
+<After_School Programs, partOf, Field Trip Organization>
+<Childcare Facility Licensing, connectedTo, Nap Time Supervision>
+<Diaper Changing, connectedTo, Parent Communication>
+<Diaper Changing, connectedTo, Parent_Teacher Conferences>
+<Early Literacy Programs, connectedTo, Preschool Education>
+<Emergency Evacuation Drills, connectedTo, Parent Communication>
+<Emergency Evacuation Drills, partOf, Field Trip Organization>
+<Individualized Attention, connectedTo, After_School Programs>
+<Individualized Attention, partOf, Field Trip Organization>
+<Infant Care, connectedTo, Potty Training Assistance>
+<Infant Care, partOf, Staff Training and Certification>
+<Learning Material Selection, connectedTo, Emergency Evacuation Drills>
+<Learning Material Selection, partOf, Field Trip Organization>
+<Nap Time Supervision, connectedTo, Infant Care>
+<Nap Time Supervision, connectedTo, Safety Supervision>
+<Nutritional Meal Preparation, connectedTo, Childcare Facility Licensing>
+<Nutritional Meal Preparation, connectedTo, Diaper Changing>
+<Nutritional Meal Preparation, connectedTo, Early Literacy Programs>
+<Nutritional Meal Preparation, connectedTo, Preschool Education>
+<Parent Communication, connectedTo, Childcare Facility Licensing>
+<Parent Communication, connectedTo, Individualized Attention>
+<Parent_Teacher Conferences, accommodates, Childcare Facility Licensing>
+<Parent_Teacher Conferences, advises, Safety Supervision>
+<Parent_Teacher Conferences, connectedTo, Nap Time Supervision>
+<Parent_Teacher Conferences, develops, Parent Communication>
+<Potty Training Assistance, observes, Nutritional Meal Preparation>
+<Potty Training Assistance, partOf, Staff Training and Certification>
+<Preschool Education, connectedTo, Diaper Changing>
+<Preschool Education, connectedTo, Parent Communication>
+<Safety Supervision, connectedTo, Child Protection Policies>
+<start, connectedTo, Nutritional Meal Preparation>
+<start, connectedTo, Parent Communication>
diff --git a/test/mermaid/hard/mermaid_14.mmd b/test/mermaid/hard/mermaid_14.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..1e5b1dee238e87699293082b4ba9cec25727aeb2
--- /dev/null
+++ b/test/mermaid/hard/mermaid_14.mmd
@@ -0,0 +1,122 @@
+graph TD
+    N0([start])
+    N1([User Account Management])
+    N2[[Live Chat Support]]
+    N3[Add to Cart]
+    N4([Checkout])
+    N5(Up_selling Offer)
+    N6{Supplier Onboarding}
+    N7[(Refund Process)]
+    N8[(Product Listing)]
+    N9[[Payment Gateway Reconciliation]]
+    N10{Marketing Campaign Launch}
+    N11{Payment}
+    N12[[Warehouse Management]]
+    N13(Delivery Tracking)
+    N14(Search Engine Optimization)
+    N15([end])
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Shipment
+        nest0_0([Invoice Generation])
+        nest0_1(Mobile App Interaction)
+    end
+    subgraph Loyalty Points
+        nest1_0[/Cart Abandonment/]
+        nest1_1[(Affiliate Marketing)]
+        nest1_2(Package Return)
+        nest1_3[Cross_selling Recommendation]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> |no| N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> |yes| N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    nest0_0 --> |yes| nest0_1
+    N2 -.-> nest0_0
+    nest0_1 --> N9
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N8 --> nest1_0
+    nest1_3 -.-> N6
+    N7 -.-> S1
+    S1 -.-> N12
+    S1 -.-> |yes| N15
+    N10 -.-> S2
+    S2 --> N15
+    S2 -.-> N14
+    N1 --> M0
+    N4 --> M0
+    N3 -.-> M0
+    N0 -.-> M0
+    M0 --> N6
+    N1 -.-> M1
+    N0 -.-> M1
+    M1 --> N3
+    N2 --> M2
+    N9 -.-> |yes| M2
+    N6 -.-> M2
+    N3 -.-> M2
+    M2 --> N12
+    style S1 fill:#FFF0CC,stroke:#FFCC80
+    style S2 fill:#FFF0CC,stroke:#FFCC80
+    style M0 fill:#FFFDE0,stroke:#FFF8A6
+    style M1 fill:#E8EAF6,stroke:#5C6BC0
+    style M2 fill:#E8EAF6,stroke:#5C6BC0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#FFF8A6,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_14.txt b/test/mermaid/hard/mermaid_14.txt
new file mode 100644
index 0000000000000000000000000000000000000000..040da22be57b4786152dc90a75243920aa493679
--- /dev/null
+++ b/test/mermaid/hard/mermaid_14.txt
@@ -0,0 +1,43 @@
+<Add to Cart, connectedTo, Checkout>
+<Add to Cart, connectedTo, Supplier Onboarding>
+<Add to Cart, connectedTo, Warehouse Management>
+<Affiliate Marketing, connectedTo, Package Return>
+<Affiliate Marketing, partOf, Loyalty Points>
+<Cart Abandonment, connectedTo, Affiliate Marketing>
+<Cart Abandonment, partOf, Loyalty Points>
+<Checkout, connectedTo, Supplier Onboarding>
+<Checkout, no, Up_selling Offer>
+<Cross_selling Recommendation, connectedTo, Supplier Onboarding>
+<Cross_selling Recommendation, partOf, Loyalty Points>
+<Delivery Tracking, connectedTo, Search Engine Optimization>
+<Invoice Generation, partOf, Shipment>
+<Invoice Generation, yes, Mobile App Interaction>
+<Live Chat Support, connectedTo, Add to Cart>
+<Live Chat Support, connectedTo, Invoice Generation>
+<Live Chat Support, connectedTo, Warehouse Management>
+<Marketing Campaign Launch, connectedTo, Search Engine Optimization>
+<Marketing Campaign Launch, connectedTo, end>
+<Marketing Campaign Launch, yes, Payment>
+<Mobile App Interaction, connectedTo, Payment Gateway Reconciliation>
+<Mobile App Interaction, partOf, Shipment>
+<Package Return, connectedTo, Cross_selling Recommendation>
+<Package Return, partOf, Loyalty Points>
+<Payment, connectedTo, Warehouse Management>
+<Payment Gateway Reconciliation, connectedTo, Marketing Campaign Launch>
+<Payment Gateway Reconciliation, yes, Warehouse Management>
+<Product Listing, connectedTo, Cart Abandonment>
+<Product Listing, connectedTo, Payment Gateway Reconciliation>
+<Refund Process, connectedTo, Product Listing>
+<Refund Process, connectedTo, Warehouse Management>
+<Refund Process, yes, end>
+<Search Engine Optimization, connectedTo, end>
+<Supplier Onboarding, connectedTo, Refund Process>
+<Supplier Onboarding, connectedTo, Warehouse Management>
+<Up_selling Offer, connectedTo, Supplier Onboarding>
+<User Account Management, connectedTo, Add to Cart>
+<User Account Management, connectedTo, Live Chat Support>
+<User Account Management, connectedTo, Supplier Onboarding>
+<Warehouse Management, connectedTo, Delivery Tracking>
+<start, connectedTo, Add to Cart>
+<start, connectedTo, Supplier Onboarding>
+<start, connectedTo, User Account Management>
diff --git a/test/mermaid/hard/mermaid_140.mmd b/test/mermaid/hard/mermaid_140.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..1ddb7aca09b19b323f693ef50d95665d52d51bbd
--- /dev/null
+++ b/test/mermaid/hard/mermaid_140.mmd
@@ -0,0 +1,116 @@
+graph RL
+    N0([Emergency Evacuation Drills])
+    N1[Child Psychology Application]
+    N2{Curriculum Planning}
+    N3[(Nutritional Meal Preparation)]
+    N4[[Special Needs Accommodation]]
+    N5[Diaper Changing]
+    N6[Early Literacy Programs]
+    N7[(Toddler Activities)]
+    N8[(Childcare Facility Licensing)]
+    N9[Behavior Management]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Preschool Education
+        nest0_0[[Outdoor Play Supervision]]
+        nest0_1(First Aid Administration)
+        nest0_2([Enrollment and Admissions])
+        nest0_3(Story Time Reading)
+    end
+    subgraph Staff Training and Certification
+        nest1_0{Potty Training Assistance}
+        nest1_1{Playground Safety Inspection}
+        nest1_2[Outdoor Exploration]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> |teaches| N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N1 -.-> nest0_0
+    nest0_3 -.-> N5
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N6 --> nest1_0
+    nest1_2 --> N7
+    N4 -.-> S0
+    S0 --> N7
+    S0 --> |engages| N8
+    S0 -.-> N6
+    N5 --> S1
+    S1 -.-> N9
+    S1 --> |develops| N7
+    S1 --> N8
+    N5 --> M0
+    N1 -.-> M0
+    M0 --> N7
+    N0 --> |enrolls| M1
+    N4 --> M1
+    N1 --> M1
+    N3 -.-> M1
+    M1 --> N6
+    style N0 fill:#F3E5F5,stroke:#AB47BC
+    style N1 fill:#E8EAF6,stroke:#5C6BC0
+    style N2 fill:#F3E5F5,stroke:#AB47BC
+    style N3 fill:#C9EFEC,stroke:#6FE1D5
+    style N4 fill:#F3E5F5,stroke:#AB47BC
+    style N5 fill:#C9EFEC,stroke:#6FE1D5
+    style N6 fill:#C9EFEC,stroke:#6FE1D5
+    style N7 fill:#F3E5F5,stroke:#AB47BC
+    style N8 fill:#F3E5F5,stroke:#AB47BC
+    style N9 fill:#F3E5F5,stroke:#AB47BC
+    style S0 fill:#E8EAF6,stroke:#5C6BC0
+    style S1 fill:#E8EAF6,stroke:#5C6BC0
+    style M0 fill:#C9EFEC,stroke:#6FE1D5
+    style M1 fill:#C9EFEC,stroke:#6FE1D5
+    style nest0_0 fill:#F3E5F5,stroke:#AB47BC
+    style nest0_1 fill:#C9EFEC,stroke:#6FE1D5
+    style nest0_2 fill:#E8EAF6,stroke:#5C6BC0
+    style nest0_3 fill:#E8EAF6,stroke:#5C6BC0
+    style nest1_0 fill:#C9EFEC,stroke:#6FE1D5
+    style nest1_1 fill:#C9EFEC,stroke:#6FE1D5
+    style nest1_2 fill:#F3E5F5,stroke:#AB47BC
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#AB47BC,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_140.txt b/test/mermaid/hard/mermaid_140.txt
new file mode 100644
index 0000000000000000000000000000000000000000..fddbfc5380b827833c7e2f4355e087ee2823c0d0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_140.txt
@@ -0,0 +1,36 @@
+<Child Psychology Application, connectedTo, Curriculum Planning>
+<Child Psychology Application, connectedTo, Early Literacy Programs>
+<Child Psychology Application, connectedTo, Outdoor Play Supervision>
+<Child Psychology Application, connectedTo, Toddler Activities>
+<Childcare Facility Licensing, connectedTo, Behavior Management>
+<Curriculum Planning, connectedTo, Nutritional Meal Preparation>
+<Diaper Changing, connectedTo, Behavior Management>
+<Diaper Changing, connectedTo, Childcare Facility Licensing>
+<Diaper Changing, connectedTo, Early Literacy Programs>
+<Diaper Changing, connectedTo, Toddler Activities>
+<Diaper Changing, develops, Toddler Activities>
+<Early Literacy Programs, connectedTo, Potty Training Assistance>
+<Early Literacy Programs, connectedTo, Toddler Activities>
+<Emergency Evacuation Drills, connectedTo, Child Psychology Application>
+<Emergency Evacuation Drills, enrolls, Early Literacy Programs>
+<Enrollment and Admissions, connectedTo, Story Time Reading>
+<Enrollment and Admissions, partOf, Preschool Education>
+<First Aid Administration, connectedTo, Enrollment and Admissions>
+<First Aid Administration, partOf, Preschool Education>
+<Nutritional Meal Preparation, connectedTo, Early Literacy Programs>
+<Nutritional Meal Preparation, teaches, Special Needs Accommodation>
+<Outdoor Exploration, connectedTo, Toddler Activities>
+<Outdoor Exploration, partOf, Staff Training and Certification>
+<Outdoor Play Supervision, connectedTo, First Aid Administration>
+<Outdoor Play Supervision, partOf, Preschool Education>
+<Playground Safety Inspection, connectedTo, Outdoor Exploration>
+<Playground Safety Inspection, partOf, Staff Training and Certification>
+<Potty Training Assistance, connectedTo, Playground Safety Inspection>
+<Potty Training Assistance, partOf, Staff Training and Certification>
+<Special Needs Accommodation, connectedTo, Diaper Changing>
+<Special Needs Accommodation, connectedTo, Early Literacy Programs>
+<Special Needs Accommodation, connectedTo, Toddler Activities>
+<Special Needs Accommodation, engages, Childcare Facility Licensing>
+<Story Time Reading, connectedTo, Diaper Changing>
+<Story Time Reading, partOf, Preschool Education>
+<Toddler Activities, connectedTo, Childcare Facility Licensing>
diff --git a/test/mermaid/hard/mermaid_141.mmd b/test/mermaid/hard/mermaid_141.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..3a06bb8a29fa44c600f7b602efbf64b09136ddd8
--- /dev/null
+++ b/test/mermaid/hard/mermaid_141.mmd
@@ -0,0 +1,136 @@
+graph TD
+    N0([Child Psychology Application])
+    N1([Child Development Assessment])
+    N2[/Nap Time Supervision/]
+    N3[Group Activities Coordination]
+    N4([Potty Training Assistance])
+    N5[[Individualized Attention]]
+    N6[[Staff Training and Certification]]
+    N7(Story Time Reading)
+    N8[Parent_Teacher Conferences]
+    N9[[Daily Activity Reporting]]
+    N10[Social Skill Development]
+    N11[Learning Material Selection]
+    N12[Special Needs Accommodation]
+    N13[After_School Programs]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Playground Safety Inspection
+        nest0_0[Safety Supervision]
+        nest0_1[(Curriculum Planning)]
+        nest0_2(Early Literacy Programs)
+    end
+    subgraph Outdoor Play Supervision
+        nest1_0[(Child Protection Policies)]
+        nest1_1(Toddler Activities)
+        nest1_2(Diaper Changing)
+        nest1_3[[First Aid Administration]]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> |develops| N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 --> N13
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    N5 --> nest0_0
+    nest0_2 -.-> |advises| N7
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 -.-> nest1_3
+    N5 -.-> |enrolls| nest1_0
+    nest1_3 -.-> |licenses| N12
+    N3 -.-> S0
+    S0 -.-> N11
+    S0 -.-> N13
+    S0 --> |observes| N5
+    S0 --> |cleans| N8
+    N9 --> S1
+    S1 -.-> N13
+    S1 --> N11
+    S1 -.-> N12
+    N2 -.-> |organizes| M0
+    N1 --> M0
+    N3 --> M0
+    M0 --> N5
+    N5 -.-> M1
+    N2 --> M1
+    N0 --> |documents| M1
+    N3 --> M1
+    M1 --> N11
+    style N0 fill:#C8E6C9,stroke:#388E3C
+    style N1 fill:#C8E6C9,stroke:#388E3C
+    style N2 fill:#C8E6C9,stroke:#388E3C
+    style N3 fill:#FFCCBC,stroke:#FF5722
+    style N4 fill:#FFF6D9,stroke:#FFCC7A
+    style N5 fill:#FFCCBC,stroke:#FF5722
+    style N6 fill:#FFF6D9,stroke:#FFCC7A
+    style N7 fill:#FFCCBC,stroke:#FF5722
+    style N8 fill:#C8E6C9,stroke:#388E3C
+    style N9 fill:#FFF6D9,stroke:#FFCC7A
+    style N10 fill:#FFCCBC,stroke:#FF5722
+    style N11 fill:#FFCCBC,stroke:#FF5722
+    style N12 fill:#FFCCBC,stroke:#FF5722
+    style N13 fill:#C8E6C9,stroke:#388E3C
+    style S0 fill:#C8E6C9,stroke:#388E3C
+    style S1 fill:#FFF6D9,stroke:#FFCC7A
+    style M0 fill:#C8E6C9,stroke:#388E3C
+    style M1 fill:#FFCCBC,stroke:#FF5722
+    style nest0_0 fill:#FFF6D9,stroke:#FFCC7A
+    style nest0_1 fill:#C8E6C9,stroke:#388E3C
+    style nest0_2 fill:#FFCCBC,stroke:#FF5722
+    style nest1_0 fill:#C8E6C9,stroke:#388E3C
+    style nest1_1 fill:#C8E6C9,stroke:#388E3C
+    style nest1_2 fill:#FFF6D9,stroke:#FFCC7A
+    style nest1_3 fill:#FFCCBC,stroke:#FF5722
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FF5722,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_141.txt b/test/mermaid/hard/mermaid_141.txt
new file mode 100644
index 0000000000000000000000000000000000000000..a4ce994f1b5fe9857d0db998795c1e4b1d368af0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_141.txt
@@ -0,0 +1,42 @@
+<Child Development Assessment, connectedTo, Individualized Attention>
+<Child Development Assessment, connectedTo, Nap Time Supervision>
+<Child Protection Policies, connectedTo, Toddler Activities>
+<Child Protection Policies, partOf, Outdoor Play Supervision>
+<Child Psychology Application, connectedTo, Child Development Assessment>
+<Child Psychology Application, documents, Learning Material Selection>
+<Curriculum Planning, connectedTo, Early Literacy Programs>
+<Curriculum Planning, partOf, Playground Safety Inspection>
+<Daily Activity Reporting, connectedTo, After_School Programs>
+<Daily Activity Reporting, connectedTo, Learning Material Selection>
+<Daily Activity Reporting, connectedTo, Social Skill Development>
+<Daily Activity Reporting, connectedTo, Special Needs Accommodation>
+<Diaper Changing, connectedTo, First Aid Administration>
+<Diaper Changing, partOf, Outdoor Play Supervision>
+<Early Literacy Programs, advises, Story Time Reading>
+<Early Literacy Programs, partOf, Playground Safety Inspection>
+<First Aid Administration, licenses, Special Needs Accommodation>
+<First Aid Administration, partOf, Outdoor Play Supervision>
+<Group Activities Coordination, cleans, Parent_Teacher Conferences>
+<Group Activities Coordination, connectedTo, After_School Programs>
+<Group Activities Coordination, connectedTo, Individualized Attention>
+<Group Activities Coordination, connectedTo, Learning Material Selection>
+<Group Activities Coordination, connectedTo, Potty Training Assistance>
+<Group Activities Coordination, observes, Individualized Attention>
+<Individualized Attention, connectedTo, Learning Material Selection>
+<Individualized Attention, connectedTo, Safety Supervision>
+<Individualized Attention, develops, Staff Training and Certification>
+<Individualized Attention, enrolls, Child Protection Policies>
+<Learning Material Selection, connectedTo, Special Needs Accommodation>
+<Nap Time Supervision, connectedTo, Group Activities Coordination>
+<Nap Time Supervision, connectedTo, Learning Material Selection>
+<Nap Time Supervision, organizes, Individualized Attention>
+<Parent_Teacher Conferences, connectedTo, Daily Activity Reporting>
+<Potty Training Assistance, connectedTo, Individualized Attention>
+<Safety Supervision, connectedTo, Curriculum Planning>
+<Safety Supervision, partOf, Playground Safety Inspection>
+<Social Skill Development, connectedTo, Learning Material Selection>
+<Special Needs Accommodation, connectedTo, After_School Programs>
+<Staff Training and Certification, connectedTo, Story Time Reading>
+<Story Time Reading, connectedTo, Parent_Teacher Conferences>
+<Toddler Activities, connectedTo, Diaper Changing>
+<Toddler Activities, partOf, Outdoor Play Supervision>
diff --git a/test/mermaid/hard/mermaid_142.mmd b/test/mermaid/hard/mermaid_142.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..a193d983e7450dbd1d0b3628aed183d1c54c5a6a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_142.mmd
@@ -0,0 +1,79 @@
+graph BT
+    N0([start])
+    N1(Home Health Aide Services)
+    N2([Chronic Disease Management])
+    N3[[Fall Prevention]]
+    N4(Physical Therapy)
+    N5(Elder Abuse Prevention)
+    N6[/Meal Preparation/]
+    N7[(Respite Care)]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    subgraph Personal Care Assistance
+        nest0_0[Pain Management]
+        nest0_1[Long_Term Care Planning]
+        nest0_2[Companionship]
+        nest0_3([Smart Home Integration for Seniors])
+    end
+    subgraph Emergency Response System Monitoring
+        nest1_0(Medication Management)
+        nest1_1[/Community Resource Connection/]
+        nest1_2[Occupational Therapy]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    nest0_0 --> |yes| nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N6 --> nest0_0
+    nest0_3 -.-> N2
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N6 --> |no| nest1_0
+    nest1_2 -.-> N5
+    N0 --> S0
+    S0 --> N2
+    S0 --> |yes| N3
+    S0 -.-> N4
+    N4 --> S1
+    S1 -.-> N6
+    S1 --> N7
+    N0 --> |no| M0
+    N1 --> M0
+    M0 --> N4
+    style S0 fill:#CADEDE,stroke:#94C0C0
+    style S1 fill:#D6D9F0,stroke:#9FA9E1
+    style M0 fill:#DACBE3,stroke:#A188D0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#9FA9E1,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_142.txt b/test/mermaid/hard/mermaid_142.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ad44eff1807755a80ad0999583ba8b822c07d823
--- /dev/null
+++ b/test/mermaid/hard/mermaid_142.txt
@@ -0,0 +1,30 @@
+<Chronic Disease Management, connectedTo, Fall Prevention>
+<Community Resource Connection, connectedTo, Occupational Therapy>
+<Community Resource Connection, partOf, Emergency Response System Monitoring>
+<Companionship, connectedTo, Smart Home Integration for Seniors>
+<Companionship, partOf, Personal Care Assistance>
+<Elder Abuse Prevention, connectedTo, Meal Preparation>
+<Fall Prevention, connectedTo, Physical Therapy>
+<Home Health Aide Services, connectedTo, Chronic Disease Management>
+<Home Health Aide Services, connectedTo, Physical Therapy>
+<Long_Term Care Planning, connectedTo, Companionship>
+<Long_Term Care Planning, partOf, Personal Care Assistance>
+<Meal Preparation, connectedTo, Pain Management>
+<Meal Preparation, connectedTo, Respite Care>
+<Meal Preparation, no, Medication Management>
+<Medication Management, connectedTo, Community Resource Connection>
+<Medication Management, partOf, Emergency Response System Monitoring>
+<Occupational Therapy, connectedTo, Elder Abuse Prevention>
+<Occupational Therapy, partOf, Emergency Response System Monitoring>
+<Pain Management, partOf, Personal Care Assistance>
+<Pain Management, yes, Long_Term Care Planning>
+<Physical Therapy, connectedTo, Elder Abuse Prevention>
+<Physical Therapy, connectedTo, Meal Preparation>
+<Physical Therapy, connectedTo, Respite Care>
+<Smart Home Integration for Seniors, connectedTo, Chronic Disease Management>
+<Smart Home Integration for Seniors, partOf, Personal Care Assistance>
+<start, connectedTo, Chronic Disease Management>
+<start, connectedTo, Home Health Aide Services>
+<start, connectedTo, Physical Therapy>
+<start, no, Physical Therapy>
+<start, yes, Fall Prevention>
diff --git a/test/mermaid/hard/mermaid_143.mmd b/test/mermaid/hard/mermaid_143.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..56992fc530b0123b3359e1731ec4ce63207f1b07
--- /dev/null
+++ b/test/mermaid/hard/mermaid_143.mmd
@@ -0,0 +1,132 @@
+graph TD
+    N0([Chronic Disease Management])
+    N1[Emergency Response System Monitoring]
+    N2{Cognitive Stimulation Activities}
+    N3[Fall Prevention]
+    N4(Community Resource Connection)
+    N5[Dementia Care]
+    N6[(Personal Care Assistance)]
+    N7[[Emotional Support and Counseling]]
+    N8[(Elder Abuse Prevention)]
+    N9(Physical Therapy)
+    N10[(Home Health Aide Services)]
+    N11{Nursing Care}
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Occupational Therapy
+        nest0_0[[Palliative Care]]
+        nest0_1[[Meal Preparation]]
+    end
+    subgraph Daily Living Assistance
+        nest1_0(Long_Term Care Planning)
+        nest1_1[Safety Assessments]
+        nest1_2([Social Engagement Activities])
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> |reports| N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    N10 --> N11
+    nest0_0 --> nest0_1
+    N6 -.-> |oversees| nest0_0
+    nest0_1 --> N2
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N9 -.-> nest1_0
+    nest1_2 --> N4
+    N8 --> S1
+    S1 -.-> N11
+    S1 -.-> N10
+    N2 -.-> S2
+    S2 --> N10
+    S2 -.-> N5
+    S2 --> N6
+    S2 -.-> N7
+    N1 --> M0
+    N4 --> M0
+    N3 --> M0
+    N2 -.-> M0
+    M0 --> N10
+    N4 --> |plans| M1
+    N1 -.-> M1
+    N5 --> M1
+    N2 -.-> M1
+    M1 -.-> N7
+    N4 --> M2
+    N9 -.-> M2
+    N1 -.-> M2
+    N0 --> M2
+    M2 -.-> N11
+    style N0 fill:#EDE7F6,stroke:#7E57C2
+    style N1 fill:#FCE4EC,stroke:#E91E63
+    style N2 fill:#FFF9D4,stroke:#FFE69C
+    style N3 fill:#FFF9D4,stroke:#FFE69C
+    style N4 fill:#EDE7F6,stroke:#7E57C2
+    style N5 fill:#EDE7F6,stroke:#7E57C2
+    style N6 fill:#FFF9D4,stroke:#FFE69C
+    style N7 fill:#FFF9D4,stroke:#FFE69C
+    style N8 fill:#FCE4EC,stroke:#E91E63
+    style N9 fill:#EDE7F6,stroke:#7E57C2
+    style N10 fill:#EDE7F6,stroke:#7E57C2
+    style N11 fill:#FCE4EC,stroke:#E91E63
+    style S1 fill:#FCE4EC,stroke:#E91E63
+    style S2 fill:#FFF9D4,stroke:#FFE69C
+    style M0 fill:#EDE7F6,stroke:#7E57C2
+    style M1 fill:#FFF9D4,stroke:#FFE69C
+    style M2 fill:#FCE4EC,stroke:#E91E63
+    style nest0_0 fill:#EDE7F6,stroke:#7E57C2
+    style nest0_1 fill:#FCE4EC,stroke:#E91E63
+    style nest1_0 fill:#FCE4EC,stroke:#E91E63
+    style nest1_1 fill:#FCE4EC,stroke:#E91E63
+    style nest1_2 fill:#FFF9D4,stroke:#FFE69C
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_145.txt b/test/mermaid/hard/mermaid_145.txt
new file mode 100644
index 0000000000000000000000000000000000000000..fc0c7ae72ffd9fc113e1450c37bb7ae7304266ae
--- /dev/null
+++ b/test/mermaid/hard/mermaid_145.txt
@@ -0,0 +1,31 @@
+<Capacity Building for Local Communities, connectedTo, Communication Protocols>
+<Capacity Building for Local Communities, connectedTo, Emergency Drills and Exercises>
+<Capacity Building for Local Communities, connectedTo, Policy and Legislation Review>
+<Capacity Building for Local Communities, connectedTo, Volunteer Coordination>
+<Cash Transfer Programs, connectedTo, Vulnerability Analysis>
+<Cash Transfer Programs, partOf, Medical Aid Deployment>
+<Communication Protocols, connectedTo, Policy and Legislation Review>
+<Emergency Drills and Exercises, connectedTo, Environmental Remediation>
+<Emergency Response, connectedTo, International Aid Coordination>
+<Emergency Response, partOf, Early Warning Systems>
+<Environmental Remediation, connectedTo, Cash Transfer Programs>
+<Environmental Remediation, protects, Satellite Imagery Analysis>
+<International Aid Coordination, connectedTo, Resilience Building>
+<International Aid Coordination, partOf, Early Warning Systems>
+<Psychosocial Support, connectedTo, Environmental Remediation>
+<Psychosocial Support, partOf, Medical Aid Deployment>
+<Reconstruction, connectedTo, Capacity Building for Local Communities>
+<Reconstruction, connectedTo, Emergency Drills and Exercises>
+<Reconstruction, connectedTo, Satellite Imagery Analysis>
+<Reconstruction, connectedTo, Volunteer Coordination>
+<Resilience Building, connectedTo, Emergency Drills and Exercises>
+<Resilience Building, partOf, Early Warning Systems>
+<Satellite Imagery Analysis, connectedTo, Emergency Response>
+<Satellite Imagery Analysis, connectedTo, Volunteer Coordination>
+<Volunteer Coordination, connectedTo, Communication Protocols>
+<Vulnerability Analysis, connectedTo, Psychosocial Support>
+<Vulnerability Analysis, partOf, Medical Aid Deployment>
+<start, connectedTo, Communication Protocols>
+<start, connectedTo, Emergency Drills and Exercises>
+<start, connectedTo, Reconstruction>
+<start, deploys, Policy and Legislation Review>
diff --git a/test/mermaid/hard/mermaid_146.txt b/test/mermaid/hard/mermaid_146.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7f56f34a825900b9cb21687b0b56e74f66a0687b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_146.txt
@@ -0,0 +1,33 @@
+<Cash Transfer Programs, connectedTo, Vulnerability Analysis>
+<Climate Change Adaptation for Disasters, connectedTo, Emergency Planning>
+<Climate Change Adaptation for Disasters, partOf, Satellite Imagery Analysis>
+<Damage Assessment, surveys, Risk Assessment>
+<Debris Management, connectedTo, Damage Assessment>
+<Debris Management, connectedTo, Drone Deployment for Assessment>
+<Debris Management, connectedTo, Early Recovery Actions>
+<Drone Deployment for Assessment, connectedTo, Cash Transfer Programs>
+<Drone Deployment for Assessment, connectedTo, Economic Recovery Initiatives>
+<Drone Deployment for Assessment, connectedTo, Public Awareness Campaigns>
+<Drone Deployment for Assessment, connectedTo, Vulnerability Analysis>
+<Drone Deployment for Assessment, evacuates, Resilience Building>
+<Early Recovery Actions, connectedTo, Damage Assessment>
+<Early Recovery Actions, connectedTo, Drone Deployment for Assessment>
+<Early Recovery Actions, connectedTo, Evacuation Procedures>
+<Economic Recovery Initiatives, connectedTo, Cash Transfer Programs>
+<Emergency Drills and Exercises, connectedTo, Drone Deployment for Assessment>
+<Emergency Planning, connectedTo, Drone Deployment for Assessment>
+<Emergency Planning, partOf, Satellite Imagery Analysis>
+<Evacuation Procedures, connectedTo, Drone Deployment for Assessment>
+<Evacuation Procedures, provides, Damage Assessment>
+<Medical Aid Deployment, connectedTo, Drone Deployment for Assessment>
+<Medical Aid Deployment, partOf, Geographic Information Systems for Disasters>
+<Public Awareness Campaigns, connectedTo, Medical Aid Deployment>
+<Public Awareness Campaigns, partOf, Geographic Information Systems for Disasters>
+<Resilience Building, connectedTo, Economic Recovery Initiatives>
+<Risk Assessment, connectedTo, Emergency Drills and Exercises>
+<Risk Assessment, reconstructs, Climate Change Adaptation for Disasters>
+<start, connectedTo, Cash Transfer Programs>
+<start, connectedTo, Damage Assessment>
+<start, connectedTo, Debris Management>
+<start, connectedTo, Vulnerability Analysis>
+<start, protects, Economic Recovery Initiatives>
diff --git a/test/mermaid/hard/mermaid_147.mmd b/test/mermaid/hard/mermaid_147.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..5678c014651d9fa3b7407701bc3298738bd28d85
--- /dev/null
+++ b/test/mermaid/hard/mermaid_147.mmd
@@ -0,0 +1,116 @@
+graph LR
+    N0([start])
+    N1([Hazard Mapping])
+    N2{Early Warning Systems}
+    N3[[Vulnerability Analysis]]
+    N4([Emergency Response])
+    N5(Capacity Building for Local Communities)
+    N6(Incident Command System)
+    N7([Evacuation Procedures])
+    N8[International Aid Coordination]
+    S0(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Medical Aid Deployment
+        nest0_0(Psychosocial Support)
+        nest0_1([Drone Deployment for Assessment])
+    end
+    subgraph Policy and Legislation Review
+        nest1_0[Resilience Building]
+        nest1_1(Economic Recovery Initiatives)
+        nest1_2[[Community Preparedness]]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> |coordinates| N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> |simulates| N7
+    N7 -.-> N8
+    nest0_0 --> nest0_1
+    N3 --> nest0_0
+    nest0_1 -.-> N6
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N4 -.-> |donates| nest1_0
+    nest1_2 -.-> |plans| N2
+    N1 -.-> S0
+    S0 --> N7
+    S0 -.-> N3
+    S0 --> N4
+    S0 -.-> N5
+    N0 --> S2
+    S2 -.-> N5
+    S2 -.-> N3
+    S2 --> N8
+    S2 -.-> N2
+    N3 --> M0
+    N5 -.-> M0
+    M0 --> N7
+    N3 -.-> M1
+    N0 -.-> M1
+    N1 -.-> M1
+    N2 -.-> M1
+    M1 -.-> N5
+    N2 -.-> M2
+    N1 --> M2
+    M2 --> N4
+    style N0 fill:#E0E6E9,stroke:#AABEC6
+    style N1 fill:#E0E6E9,stroke:#AABEC6
+    style N2 fill:#D1C4E9,stroke:#7E57C2
+    style N3 fill:#E0E6E9,stroke:#AABEC6
+    style N4 fill:#EDE7F6,stroke:#7E57C2
+    style N5 fill:#E0E6E9,stroke:#AABEC6
+    style N6 fill:#D1C4E9,stroke:#7E57C2
+    style N7 fill:#D1C4E9,stroke:#7E57C2
+    style N8 fill:#D1C4E9,stroke:#7E57C2
+    style S0 fill:#EDE7F6,stroke:#7E57C2
+    style S2 fill:#E0E6E9,stroke:#AABEC6
+    style M0 fill:#D1C4E9,stroke:#7E57C2
+    style M1 fill:#EDE7F6,stroke:#7E57C2
+    style M2 fill:#EDE7F6,stroke:#7E57C2
+    style nest0_0 fill:#E0E6E9,stroke:#AABEC6
+    style nest0_1 fill:#EDE7F6,stroke:#7E57C2
+    style nest1_0 fill:#D1C4E9,stroke:#7E57C2
+    style nest1_1 fill:#E0E6E9,stroke:#AABEC6
+    style nest1_2 fill:#D1C4E9,stroke:#7E57C2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#7E57C2,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_147.txt b/test/mermaid/hard/mermaid_147.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7e032accd878460e22431e449fd5906c04bdbb8a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_147.txt
@@ -0,0 +1,33 @@
+<Capacity Building for Local Communities, connectedTo, Evacuation Procedures>
+<Capacity Building for Local Communities, connectedTo, Incident Command System>
+<Community Preparedness, partOf, Policy and Legislation Review>
+<Community Preparedness, plans, Early Warning Systems>
+<Drone Deployment for Assessment, connectedTo, Incident Command System>
+<Drone Deployment for Assessment, partOf, Medical Aid Deployment>
+<Early Warning Systems, connectedTo, Capacity Building for Local Communities>
+<Early Warning Systems, connectedTo, Emergency Response>
+<Early Warning Systems, coordinates, Vulnerability Analysis>
+<Economic Recovery Initiatives, connectedTo, Community Preparedness>
+<Economic Recovery Initiatives, partOf, Policy and Legislation Review>
+<Emergency Response, connectedTo, Capacity Building for Local Communities>
+<Emergency Response, donates, Resilience Building>
+<Evacuation Procedures, connectedTo, International Aid Coordination>
+<Hazard Mapping, connectedTo, Capacity Building for Local Communities>
+<Hazard Mapping, connectedTo, Early Warning Systems>
+<Hazard Mapping, connectedTo, Emergency Response>
+<Hazard Mapping, connectedTo, Evacuation Procedures>
+<Hazard Mapping, connectedTo, Vulnerability Analysis>
+<Incident Command System, simulates, Evacuation Procedures>
+<Psychosocial Support, connectedTo, Drone Deployment for Assessment>
+<Psychosocial Support, partOf, Medical Aid Deployment>
+<Resilience Building, connectedTo, Economic Recovery Initiatives>
+<Resilience Building, partOf, Policy and Legislation Review>
+<Vulnerability Analysis, connectedTo, Capacity Building for Local Communities>
+<Vulnerability Analysis, connectedTo, Emergency Response>
+<Vulnerability Analysis, connectedTo, Evacuation Procedures>
+<Vulnerability Analysis, connectedTo, Psychosocial Support>
+<start, connectedTo, Capacity Building for Local Communities>
+<start, connectedTo, Early Warning Systems>
+<start, connectedTo, Hazard Mapping>
+<start, connectedTo, International Aid Coordination>
+<start, connectedTo, Vulnerability Analysis>
diff --git a/test/mermaid/hard/mermaid_148.mmd b/test/mermaid/hard/mermaid_148.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..a8eacb6fbd20f9fb743594ee7e59772bed47fd18
--- /dev/null
+++ b/test/mermaid/hard/mermaid_148.mmd
@@ -0,0 +1,106 @@
+graph RL
+    N0([Combat Operations])
+    N1[/Disaster Relief Deployment/]
+    N2[Rules of Engagement]
+    N3([Civil_Military Cooperation])
+    N4(Crisis Management)
+    N5[Air Operations]
+    N6[Defense Procurement]
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Logistics Support
+        nest0_0[[Force Projection]]
+        nest0_1([Targeting])
+        nest0_2[[Peacekeeping Missions]]
+    end
+    subgraph Surveillance
+        nest1_0(Military Strategy Development)
+        nest1_1[(Counter_Terrorism Operations)]
+        nest1_2[Naval Operations]
+        nest1_3[[Counter_Insurgency Operations]]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> |deploys| N6
+    nest0_0 -.-> |evaluates| nest0_1
+    nest0_1 --> nest0_2
+    N1 --> nest0_0
+    nest0_2 --> N2
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N2 -.-> nest1_0
+    nest1_3 -.-> N5
+    N0 -.-> S1
+    S1 -.-> N2
+    S1 --> N3
+    N3 -.-> S2
+    S2 -.-> N5
+    S2 --> N6
+    N0 --> M0
+    N1 --> M0
+    M0 --> N3
+    N0 --> M1
+    N1 --> M1
+    M1 -.-> N3
+    N2 --> M2
+    N0 -.-> M2
+    N1 -.-> |reports| M2
+    M2 --> N4
+    style N0 fill:#E0F2F1,stroke:#4DB6AC
+    style N1 fill:#D3D7EB,stroke:#8C9EFF
+    style N2 fill:#E0F2F1,stroke:#4DB6AC
+    style N3 fill:#D6D9F0,stroke:#9FA9E1
+    style N4 fill:#D3D7EB,stroke:#8C9EFF
+    style N5 fill:#D3D7EB,stroke:#8C9EFF
+    style N6 fill:#D6D9F0,stroke:#9FA9E1
+    style S1 fill:#E0F2F1,stroke:#4DB6AC
+    style S2 fill:#D6D9F0,stroke:#9FA9E1
+    style M0 fill:#E0F2F1,stroke:#4DB6AC
+    style M1 fill:#E0F2F1,stroke:#4DB6AC
+    style M2 fill:#E0F2F1,stroke:#4DB6AC
+    style nest0_0 fill:#E0F2F1,stroke:#4DB6AC
+    style nest0_1 fill:#D3D7EB,stroke:#8C9EFF
+    style nest0_2 fill:#D6D9F0,stroke:#9FA9E1
+    style nest1_0 fill:#D6D9F0,stroke:#9FA9E1
+    style nest1_1 fill:#E0F2F1,stroke:#4DB6AC
+    style nest1_2 fill:#D3D7EB,stroke:#8C9EFF
+    style nest1_3 fill:#D6D9F0,stroke:#9FA9E1
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#8C9EFF,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_149.mmd b/test/mermaid/hard/mermaid_149.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..2224079772b32ea5d963f5c0f65b470f124d86eb
--- /dev/null
+++ b/test/mermaid/hard/mermaid_149.mmd
@@ -0,0 +1,136 @@
+graph RL
+    N0([start])
+    N1[[Joint Exercises]]
+    N2[Veteran Support]
+    N3[Peacekeeping Missions]
+    N4(Operations Planning)
+    N5{Equipment Maintenance}
+    N6{Demobilization}
+    N7(Basic Training)
+    N8(Air Operations)
+    N9[Weapon Systems Development]
+    N10(Logistics Support)
+    N11[[Naval Operations]]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Intelligence Gathering
+        nest0_0[(Unmanned Systems Operation)]
+        nest0_1(Troop Deployment)
+        nest0_2[/Military Strategy Development/]
+        nest0_3[/Military Law/]
+    end
+    subgraph Counter_Insurgency Operations
+        nest1_0[Cyber Warfare Operations]
+        nest1_1{Rules of Engagement}
+        nest1_2(Readiness Assessment)
+        nest1_3[Family Support Programs]
+    end
+    N0 -.-> |tests| N1
+    N1 --> N2
+    N2 --> |interdicts| N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N7 --> |reconnoiters| nest0_0
+    nest0_3 --> N11
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> |surveys| nest1_3
+    N2 -.-> nest1_0
+    nest1_3 -.-> N9
+    N3 -.-> S0
+    S0 --> N7
+    S0 --> |reports| N9
+    N3 --> S1
+    S1 -.-> N9
+    S1 -.-> N10
+    S1 --> N5
+    N6 -.-> M0
+    N2 -.-> |defends| M0
+    N3 -.-> M0
+    M0 -.-> N8
+    N5 -.-> M1
+    N4 --> M1
+    N1 --> M1
+    N0 -.-> M1
+    M1 --> N11
+    N1 --> M2
+    N2 --> M2
+    M2 -.-> N5
+    style N0 fill:#FBE9E7,stroke:#FF8A65
+    style N1 fill:#D7CCC8,stroke:#795548
+    style N2 fill:#D7CCC8,stroke:#795548
+    style N3 fill:#FBE9E7,stroke:#FF8A65
+    style N4 fill:#D7CCC8,stroke:#795548
+    style N5 fill:#FAEBF3,stroke:#F7BEE0
+    style N6 fill:#FBE9E7,stroke:#FF8A65
+    style N7 fill:#FAEBF3,stroke:#F7BEE0
+    style N8 fill:#FBE9E7,stroke:#FF8A65
+    style N9 fill:#FBE9E7,stroke:#FF8A65
+    style N10 fill:#FBE9E7,stroke:#FF8A65
+    style N11 fill:#D7CCC8,stroke:#795548
+    style S0 fill:#D7CCC8,stroke:#795548
+    style S1 fill:#FAEBF3,stroke:#F7BEE0
+    style M0 fill:#D7CCC8,stroke:#795548
+    style M1 fill:#D7CCC8,stroke:#795548
+    style M2 fill:#FBE9E7,stroke:#FF8A65
+    style nest0_0 fill:#D7CCC8,stroke:#795548
+    style nest0_1 fill:#FAEBF3,stroke:#F7BEE0
+    style nest0_2 fill:#FAEBF3,stroke:#F7BEE0
+    style nest0_3 fill:#FBE9E7,stroke:#FF8A65
+    style nest1_0 fill:#FAEBF3,stroke:#F7BEE0
+    style nest1_1 fill:#D7CCC8,stroke:#795548
+    style nest1_2 fill:#FBE9E7,stroke:#FF8A65
+    style nest1_3 fill:#D7CCC8,stroke:#795548
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#F7BEE0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_149.txt b/test/mermaid/hard/mermaid_149.txt
new file mode 100644
index 0000000000000000000000000000000000000000..f49a41583998859678a774f56642e3449871bda8
--- /dev/null
+++ b/test/mermaid/hard/mermaid_149.txt
@@ -0,0 +1,43 @@
+<Air Operations, connectedTo, Weapon Systems Development>
+<Basic Training, connectedTo, Air Operations>
+<Basic Training, reconnoiters, Unmanned Systems Operation>
+<Cyber Warfare Operations, connectedTo, Rules of Engagement>
+<Cyber Warfare Operations, partOf, Counter_Insurgency Operations>
+<Demobilization, connectedTo, Air Operations>
+<Demobilization, connectedTo, Basic Training>
+<Equipment Maintenance, connectedTo, Demobilization>
+<Equipment Maintenance, connectedTo, Naval Operations>
+<Family Support Programs, connectedTo, Weapon Systems Development>
+<Family Support Programs, partOf, Counter_Insurgency Operations>
+<Joint Exercises, connectedTo, Equipment Maintenance>
+<Joint Exercises, connectedTo, Naval Operations>
+<Joint Exercises, connectedTo, Veteran Support>
+<Logistics Support, connectedTo, Naval Operations>
+<Military Law, connectedTo, Naval Operations>
+<Military Law, partOf, Intelligence Gathering>
+<Military Strategy Development, connectedTo, Military Law>
+<Military Strategy Development, partOf, Intelligence Gathering>
+<Operations Planning, connectedTo, Equipment Maintenance>
+<Operations Planning, connectedTo, Naval Operations>
+<Peacekeeping Missions, connectedTo, Air Operations>
+<Peacekeeping Missions, connectedTo, Basic Training>
+<Peacekeeping Missions, connectedTo, Equipment Maintenance>
+<Peacekeeping Missions, connectedTo, Logistics Support>
+<Peacekeeping Missions, connectedTo, Operations Planning>
+<Peacekeeping Missions, connectedTo, Weapon Systems Development>
+<Peacekeeping Missions, reports, Weapon Systems Development>
+<Readiness Assessment, partOf, Counter_Insurgency Operations>
+<Readiness Assessment, surveys, Family Support Programs>
+<Rules of Engagement, connectedTo, Readiness Assessment>
+<Rules of Engagement, partOf, Counter_Insurgency Operations>
+<Troop Deployment, connectedTo, Military Strategy Development>
+<Troop Deployment, partOf, Intelligence Gathering>
+<Unmanned Systems Operation, connectedTo, Troop Deployment>
+<Unmanned Systems Operation, partOf, Intelligence Gathering>
+<Veteran Support, connectedTo, Cyber Warfare Operations>
+<Veteran Support, connectedTo, Equipment Maintenance>
+<Veteran Support, defends, Air Operations>
+<Veteran Support, interdicts, Peacekeeping Missions>
+<Weapon Systems Development, connectedTo, Logistics Support>
+<start, connectedTo, Naval Operations>
+<start, tests, Joint Exercises>
diff --git a/test/mermaid/hard/mermaid_15.txt b/test/mermaid/hard/mermaid_15.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ea812447ed99a324a6aa108c253648ba1c623924
--- /dev/null
+++ b/test/mermaid/hard/mermaid_15.txt
@@ -0,0 +1,32 @@
+<Customer Segmentation, connectedTo, Social Media Integration>
+<Customer Segmentation, connectedTo, Supplier Onboarding>
+<Delivery Rescheduling, connectedTo, Supplier Onboarding>
+<Delivery Rescheduling, fulfills, Cross_selling Recommendation>
+<Delivery Rescheduling, inquires, Inventory Update>
+<Gift Card Purchase, connectedTo, Shipment>
+<Gift Card Purchase, partOf, Price Adjustment>
+<Inventory Update, connectedTo, Promotion Application>
+<Inventory Update, connectedTo, Supplier Onboarding>
+<Live Chat Support, connectedTo, Cross_selling Recommendation>
+<Live Chat Support, connectedTo, Subscription Service>
+<Order Confirmation, connectedTo, Up_selling Offer>
+<Order Confirmation, partOf, Price Adjustment>
+<Promotion Application, connectedTo, Warehouse Management>
+<Promotion Application, partOf, Cart Abandonment>
+<Shipment, connectedTo, Social Media Integration>
+<Shipment, partOf, Price Adjustment>
+<Social Media Integration, connectedTo, Delivery Rescheduling>
+<Social Media Integration, connectedTo, Supplier Onboarding>
+<Stock Replenishment, connectedTo, Social Media Integration>
+<Stock Replenishment, partOf, Cart Abandonment>
+<Subscription Service, analyzes, Cross_selling Recommendation>
+<Supplier Onboarding, connectedTo, Order Confirmation>
+<Supplier Onboarding, processes, Wishlist Management>
+<Up_selling Offer, connectedTo, Gift Card Purchase>
+<Up_selling Offer, partOf, Price Adjustment>
+<Warehouse Management, connectedTo, Stock Replenishment>
+<Warehouse Management, partOf, Cart Abandonment>
+<Wishlist Management, connectedTo, Cross_selling Recommendation>
+<Wishlist Management, connectedTo, Subscription Service>
+<Wishlist Management, manages, Live Chat Support>
+<Wishlist Management, routes, Cross_selling Recommendation>
diff --git a/test/mermaid/hard/mermaid_150.txt b/test/mermaid/hard/mermaid_150.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b4b42700b5727302a889260740c48873263d77ba
--- /dev/null
+++ b/test/mermaid/hard/mermaid_150.txt
@@ -0,0 +1,38 @@
+<Air Operations, connectedTo, Medical Support>
+<Air Operations, connectedTo, Military Strategy Development>
+<Basic Training, connectedTo, Specialized Training>
+<Civil_Military Cooperation, connectedTo, Counter_Insurgency Operations>
+<Civil_Military Cooperation, connectedTo, Defense Procurement>
+<Civil_Military Cooperation, connectedTo, Medical Support>
+<Civil_Military Cooperation, connectedTo, Military Law>
+<Civil_Military Cooperation, connectedTo, Naval Operations>
+<Combat Operations, connectedTo, Basic Training>
+<Combat Operations, partOf, Disaster Relief Deployment>
+<Counter_Insurgency Operations, connectedTo, Counter_Terrorism Operations>
+<Counter_Terrorism Operations, connectedTo, Military Law>
+<Defense Procurement, connectedTo, Air Operations>
+<Defense Procurement, reports, Demobilization>
+<Demobilization, connectedTo, Recruitment>
+<Demobilization, partOf, Peacekeeping Missions>
+<Joint Exercises, connectedTo, Readiness Assessment>
+<Medical Support, connectedTo, Naval Operations>
+<Military Law, connectedTo, Defense Procurement>
+<Military Law, connectedTo, Medical Support>
+<Military Law, connectedTo, Naval Operations>
+<Military Strategy Development, connectedTo, Weapon Systems Development>
+<Military Strategy Development, partOf, Disaster Relief Deployment>
+<Readiness Assessment, connectedTo, Basic Training>
+<Readiness Assessment, connectedTo, Counter_Terrorism Operations>
+<Readiness Assessment, connectedTo, Specialized Training>
+<Recruitment, connectedTo, Space Operations>
+<Recruitment, partOf, Peacekeeping Missions>
+<Space Operations, connectedTo, Counter_Insurgency Operations>
+<Space Operations, partOf, Peacekeeping Missions>
+<Specialized Training, connectedTo, Civil_Military Cooperation>
+<Specialized Training, connectedTo, Medical Support>
+<Specialized Training, connectedTo, Military Law>
+<Veteran Support, connectedTo, Joint Exercises>
+<Veteran Support, connectedTo, Medical Support>
+<Veteran Support, connectedTo, Military Law>
+<Weapon Systems Development, logistics, Combat Operations>
+<Weapon Systems Development, partOf, Disaster Relief Deployment>
diff --git a/test/mermaid/hard/mermaid_151.mmd b/test/mermaid/hard/mermaid_151.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..786b13e5b78d39453d64d346a06b07892479378f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_151.mmd
@@ -0,0 +1,128 @@
+graph LR
+    N0([start])
+    N1([Regulatory Compliance])
+    N2([Fleet Management])
+    N3[Weather Briefing]
+    N4([Baggage Handling])
+    N5[(Aviation Safety Investigation)]
+    N6[/Ground Support/]
+    N7[In_flight Service]
+    N8[Flight Simulation]
+    N9[/Flight Planning/]
+    N10[/Unmanned Aerial Vehicle Integration/]
+    N11([Airspace Management])
+    N12[[Airport Security Management]]
+    N13[(Cargo Loading)]
+    N14{Air Cargo Logistics}
+    N15([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Fueling Operations
+        nest0_0[Aircraft De_icing]
+        nest0_1[Delay Management]
+        nest0_2(Security Screening)
+        nest0_3[Air Traffic Control]
+    end
+    subgraph Next_Generation Air Traffic Management
+        nest1_0{Airport Operations}
+        nest1_1[Crew Resource Management]
+        nest1_2[Navigation System Check]
+        nest1_3([Remote Tower Operations])
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 --> N15
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N12 -.-> nest0_0
+    nest0_3 -.-> N12
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N6 -.-> nest1_0
+    nest1_3 --> N12
+    N4 -.-> S0
+    S0 -.-> N8
+    S0 --> N9
+    S0 --> N14
+    N5 --> S1
+    S1 -.-> N8
+    S1 -.-> N15
+    N0 --> M0
+    N5 --> M0
+    N6 -.-> M0
+    M0 --> N9
+    N4 -.-> M1
+    N6 -.-> M1
+    N5 --> |no| M1
+    M1 --> N8
+    N0 -.-> M2
+    N2 --> M2
+    N1 --> M2
+    M2 --> N7
+    style S0 fill:#F3E5F5,stroke:#BA68C8
+    style S1 fill:#F3E5F5,stroke:#AB47BC
+    style M0 fill:#E4E0DF,stroke:#BDAFA8
+    style M1 fill:#F3E5F5,stroke:#BA68C8
+    style M2 fill:#E4E0DF,stroke:#BDAFA8
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#AB47BC,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_151.txt b/test/mermaid/hard/mermaid_151.txt
new file mode 100644
index 0000000000000000000000000000000000000000..bf313905bb5aef8c2848c8fa7d979497a4d3250d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_151.txt
@@ -0,0 +1,46 @@
+<Air Cargo Logistics, connectedTo, end>
+<Air Traffic Control, connectedTo, Airport Security Management>
+<Air Traffic Control, partOf, Fueling Operations>
+<Aircraft De_icing, connectedTo, Delay Management>
+<Aircraft De_icing, partOf, Fueling Operations>
+<Airport Operations, connectedTo, Crew Resource Management>
+<Airport Operations, partOf, Next_Generation Air Traffic Management>
+<Airport Security Management, connectedTo, Aircraft De_icing>
+<Airport Security Management, connectedTo, Cargo Loading>
+<Airspace Management, connectedTo, Airport Security Management>
+<Aviation Safety Investigation, connectedTo, Flight Planning>
+<Aviation Safety Investigation, connectedTo, Flight Simulation>
+<Aviation Safety Investigation, connectedTo, Ground Support>
+<Aviation Safety Investigation, connectedTo, end>
+<Aviation Safety Investigation, no, Flight Simulation>
+<Baggage Handling, connectedTo, Air Cargo Logistics>
+<Baggage Handling, connectedTo, Aviation Safety Investigation>
+<Baggage Handling, connectedTo, Flight Planning>
+<Baggage Handling, connectedTo, Flight Simulation>
+<Cargo Loading, connectedTo, Air Cargo Logistics>
+<Crew Resource Management, connectedTo, Navigation System Check>
+<Crew Resource Management, partOf, Next_Generation Air Traffic Management>
+<Delay Management, connectedTo, Security Screening>
+<Delay Management, partOf, Fueling Operations>
+<Fleet Management, connectedTo, In_flight Service>
+<Fleet Management, connectedTo, Weather Briefing>
+<Flight Planning, connectedTo, Unmanned Aerial Vehicle Integration>
+<Flight Simulation, connectedTo, Flight Planning>
+<Ground Support, connectedTo, Airport Operations>
+<Ground Support, connectedTo, Flight Planning>
+<Ground Support, connectedTo, Flight Simulation>
+<Ground Support, connectedTo, In_flight Service>
+<In_flight Service, connectedTo, Flight Simulation>
+<Navigation System Check, connectedTo, Remote Tower Operations>
+<Navigation System Check, partOf, Next_Generation Air Traffic Management>
+<Regulatory Compliance, connectedTo, Fleet Management>
+<Regulatory Compliance, connectedTo, In_flight Service>
+<Remote Tower Operations, connectedTo, Airport Security Management>
+<Remote Tower Operations, partOf, Next_Generation Air Traffic Management>
+<Security Screening, connectedTo, Air Traffic Control>
+<Security Screening, partOf, Fueling Operations>
+<Unmanned Aerial Vehicle Integration, connectedTo, Airspace Management>
+<Weather Briefing, connectedTo, Baggage Handling>
+<start, connectedTo, Flight Planning>
+<start, connectedTo, In_flight Service>
+<start, connectedTo, Regulatory Compliance>
diff --git a/test/mermaid/hard/mermaid_152.mmd b/test/mermaid/hard/mermaid_152.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..46c5ddd1451473dbeb728c522c0836120a8f9d40
--- /dev/null
+++ b/test/mermaid/hard/mermaid_152.mmd
@@ -0,0 +1,123 @@
+graph BT
+    N0([start])
+    N1[/Unmanned Aerial Vehicle Integration/]
+    N2[(Remote Tower Operations)]
+    N3[(Airworthiness Certification)]
+    N4[[Next_Generation Air Traffic Management]]
+    N5[Engine Overhaul]
+    N6([Crew Resource Management])
+    N7[Aircraft Maintenance]
+    N8[/Navigation System Check/]
+    N9[(Fueling Operations)]
+    N10{Security Screening}
+    N11[(Passenger Check_in)]
+    N12(Fleet Management)
+    N13([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Crew Scheduling
+        nest0_0([Air Cargo Logistics])
+        nest0_1([Aviation Safety Investigation])
+        nest0_2[/Emergency Procedures Training/]
+        nest0_3(Ground Support)
+    end
+    subgraph Aircraft Manufacturing
+        nest1_0[(Pilot Training)]
+        nest1_1[Delay Management]
+        nest1_2[Aircraft De_icing]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> |no| N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> |yes| N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    N11 --> N12
+    N12 --> N13
+    nest0_0 --> |yes| nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N12 --> nest0_0
+    nest0_3 --> N3
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N7 --> nest1_0
+    nest1_2 -.-> N2
+    N5 --> S0
+    S0 --> N12
+    S0 -.-> N13
+    S0 -.-> N11
+    S0 --> N7
+    N8 --> S1
+    S1 -.-> N10
+    S1 --> |yes| N12
+    S1 --> N11
+    S1 -.-> N13
+    N5 --> S2
+    S2 --> |yes| N12
+    S2 -.-> N11
+    N0 --> M0
+    N4 -.-> M0
+    N1 --> M0
+    N2 -.-> |no| M0
+    M0 --> N7
+    N2 --> M1
+    N1 --> |yes| M1
+    M1 --> N4
+    style S0 fill:#FFDAB9,stroke:#FFC085
+    style S1 fill:#FFDAB9,stroke:#FFC085
+    style S2 fill:#FFFCE6,stroke:#FFF9AE
+    style M0 fill:#FFDAB9,stroke:#FFC085
+    style M1 fill:#FFDAB9,stroke:#FFC085
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#9C27B0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_153.txt b/test/mermaid/hard/mermaid_153.txt
new file mode 100644
index 0000000000000000000000000000000000000000..9748ff7cfcef9826de3f4b43e1bdca6af368dd71
--- /dev/null
+++ b/test/mermaid/hard/mermaid_153.txt
@@ -0,0 +1,35 @@
+<Air Cargo Logistics, connectedTo, Aviation Safety Investigation>
+<Air Cargo Logistics, partOf, Airport Security Management>
+<Air Traffic Control, connectedTo, Engine Overhaul>
+<Air Traffic Control, partOf, Airport Security Management>
+<Aircraft De_icing, connectedTo, Sustainable Aviation Fuel Development>
+<Airport Operations, connectedTo, Aircraft De_icing>
+<Airport Operations, connectedTo, Crew Scheduling>
+<Aviation Safety Investigation, connectedTo, Air Traffic Control>
+<Aviation Safety Investigation, partOf, Airport Security Management>
+<Baggage Handling, connectedTo, Air Cargo Logistics>
+<Baggage Handling, connectedTo, Crew Resource Management>
+<Baggage Handling, connectedTo, Runway Management>
+<Crew Resource Management, connectedTo, Noise Abatement Procedures>
+<Crew Scheduling, connectedTo, Gate Assignment>
+<Crew Scheduling, partOf, Security Screening>
+<Delay Management, connectedTo, In_flight Service>
+<Delay Management, partOf, Security Screening>
+<Engine Overhaul, integrates, Crew Resource Management>
+<Fleet Management, connectedTo, Baggage Handling>
+<Fueling Operations, connectedTo, Crew Resource Management>
+<Fueling Operations, connectedTo, Engine Overhaul>
+<Gate Assignment, connectedTo, Delay Management>
+<Gate Assignment, partOf, Security Screening>
+<In_flight Service, connectedTo, Noise Abatement Procedures>
+<In_flight Service, partOf, Security Screening>
+<Noise Abatement Procedures, connectedTo, Airport Operations>
+<Runway Management, connectedTo, Crew Resource Management>
+<Runway Management, connectedTo, Engine Overhaul>
+<Runway Management, connectedTo, Fueling Operations>
+<Runway Management, connectedTo, Noise Abatement Procedures>
+<Runway Management, connectedTo, Sustainable Aviation Fuel Development>
+<Runway Management, connectedTo, Weather Briefing>
+<Sustainable Aviation Fuel Development, connectedTo, Weather Briefing>
+<start, connectedTo, Crew Resource Management>
+<start, connectedTo, Fleet Management>
diff --git a/test/mermaid/hard/mermaid_154.mmd b/test/mermaid/hard/mermaid_154.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..2cd42e5b7095d12b6803ec0f35f721f409b3c2fd
--- /dev/null
+++ b/test/mermaid/hard/mermaid_154.mmd
@@ -0,0 +1,104 @@
+graph BT
+    N0([GPS Positioning])
+    N1([Multi_modal Navigation])
+    N2[/Aeronautical Charting/]
+    N3[Bearing and Distance Calculation]
+    N4(Satellite Navigation Systems)
+    N5(Dead Reckoning)
+    N6[Lane Guidance]
+    N7[Traffic Information]
+    N8[Points of Interest Search]
+    N9[/Wearable Device Navigation/]
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph ETA Estimation
+        nest0_0[Real_Time Re_routing]
+        nest0_1[Voice Guidance Customization]
+        nest0_2[Topographic Mapping]
+    end
+    subgraph Turn_by_Turn Directions
+        nest1_0[Altitude Tracking]
+        nest1_1(Inertial Navigation System)
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N7 -.-> nest0_0
+    nest0_2 --> N5
+    nest1_0 --> nest1_1
+    N1 -.-> nest1_0
+    nest1_1 -.-> N7
+    N3 --> S1
+    S1 -.-> N8
+    S1 --> N5
+    S1 -.-> N9
+    N1 --> S2
+    S2 -.-> N9
+    S2 --> N4
+    N1 --> M0
+    N0 --> M0
+    M0 -.-> N4
+    N1 -.-> |orients| M1
+    N0 --> M1
+    N4 --> M1
+    M1 -.-> N6
+    style N0 fill:#F6F6F6,stroke:#CFCFCF
+    style N1 fill:#F6F6F6,stroke:#CFCFCF
+    style N2 fill:#E4E0DF,stroke:#BDAFA8
+    style N3 fill:#F6F6F6,stroke:#CFCFCF
+    style N4 fill:#F6F6F6,stroke:#CFCFCF
+    style N5 fill:#D7CCC8,stroke:#795548
+    style N6 fill:#D7CCC8,stroke:#795548
+    style N7 fill:#E4E0DF,stroke:#BDAFA8
+    style N8 fill:#D7CCC8,stroke:#795548
+    style N9 fill:#F6F6F6,stroke:#CFCFCF
+    style S1 fill:#D7CCC8,stroke:#795548
+    style S2 fill:#F6F6F6,stroke:#CFCFCF
+    style M0 fill:#D7CCC8,stroke:#795548
+    style M1 fill:#F6F6F6,stroke:#CFCFCF
+    style nest0_0 fill:#F6F6F6,stroke:#CFCFCF
+    style nest0_1 fill:#E4E0DF,stroke:#BDAFA8
+    style nest0_2 fill:#D7CCC8,stroke:#795548
+    style nest1_0 fill:#F6F6F6,stroke:#CFCFCF
+    style nest1_1 fill:#F6F6F6,stroke:#CFCFCF
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#BDAFA8,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_154.txt b/test/mermaid/hard/mermaid_154.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6532daa11089b1dea519a72d32abd21a59f46460
--- /dev/null
+++ b/test/mermaid/hard/mermaid_154.txt
@@ -0,0 +1,30 @@
+<Aeronautical Charting, connectedTo, Bearing and Distance Calculation>
+<Altitude Tracking, connectedTo, Inertial Navigation System>
+<Altitude Tracking, partOf, Turn_by_Turn Directions>
+<Bearing and Distance Calculation, connectedTo, Dead Reckoning>
+<Bearing and Distance Calculation, connectedTo, Points of Interest Search>
+<Bearing and Distance Calculation, connectedTo, Satellite Navigation Systems>
+<Bearing and Distance Calculation, connectedTo, Wearable Device Navigation>
+<Dead Reckoning, connectedTo, Lane Guidance>
+<GPS Positioning, connectedTo, Lane Guidance>
+<GPS Positioning, connectedTo, Multi_modal Navigation>
+<GPS Positioning, connectedTo, Satellite Navigation Systems>
+<Inertial Navigation System, connectedTo, Traffic Information>
+<Inertial Navigation System, partOf, Turn_by_Turn Directions>
+<Lane Guidance, connectedTo, Traffic Information>
+<Multi_modal Navigation, connectedTo, Aeronautical Charting>
+<Multi_modal Navigation, connectedTo, Altitude Tracking>
+<Multi_modal Navigation, connectedTo, Satellite Navigation Systems>
+<Multi_modal Navigation, connectedTo, Wearable Device Navigation>
+<Multi_modal Navigation, orients, Lane Guidance>
+<Points of Interest Search, connectedTo, Wearable Device Navigation>
+<Real_Time Re_routing, connectedTo, Voice Guidance Customization>
+<Real_Time Re_routing, partOf, ETA Estimation>
+<Satellite Navigation Systems, connectedTo, Dead Reckoning>
+<Satellite Navigation Systems, connectedTo, Lane Guidance>
+<Topographic Mapping, connectedTo, Dead Reckoning>
+<Topographic Mapping, partOf, ETA Estimation>
+<Traffic Information, connectedTo, Points of Interest Search>
+<Traffic Information, connectedTo, Real_Time Re_routing>
+<Voice Guidance Customization, connectedTo, Topographic Mapping>
+<Voice Guidance Customization, partOf, ETA Estimation>
diff --git a/test/mermaid/hard/mermaid_155.mmd b/test/mermaid/hard/mermaid_155.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..f47017c1e9ecf8891c9b1a796585acfd60146456
--- /dev/null
+++ b/test/mermaid/hard/mermaid_155.mmd
@@ -0,0 +1,103 @@
+graph LR
+    N0([start])
+    N1[Indoor Navigation]
+    N2{Marine Charting}
+    N3{Navigation Data Update}
+    N4(Satellite Navigation Systems)
+    N5(Public Transit Navigation)
+    N6[/Map Display/]
+    N7([Inertial Navigation System])
+    N8(Altitude Tracking)
+    N9(Voice Guidance Customization)
+    N10[Real_Time Re_routing]
+    N11[Offline Map Support]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Personalized Route Preferences
+        nest0_0(Dead Reckoning)
+        nest0_1{Points of Interest Search}
+        nest0_2([Reverse Geocoding])
+    end
+    subgraph Pedestrian Navigation
+        nest1_0(Lane Guidance)
+        nest1_1(ETA Estimation)
+        nest1_2[Hazard Alerts]
+        nest1_3[(Multi_modal Navigation)]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N3 --> nest0_0
+    nest0_2 -.-> N2
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N4 --> nest1_0
+    nest1_3 --> N9
+    N5 -.-> S0
+    S0 --> N11
+    S0 -.-> N9
+    N5 -.-> S1
+    S1 --> N10
+    S1 --> N9
+    S1 -.-> N7
+    N0 --> M0
+    N7 --> M0
+    N1 --> M0
+    M0 --> N9
+    N0 -.-> M1
+    N2 -.-> M1
+    N1 --> M1
+    M1 -.-> N4
+    style S0 fill:#F3E5F5,stroke:#AB47BC
+    style S1 fill:#D3D7EB,stroke:#8C9EFF
+    style M0 fill:#D3D7EB,stroke:#8C9EFF
+    style M1 fill:#F3E5F5,stroke:#AB47BC
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_155.txt b/test/mermaid/hard/mermaid_155.txt
new file mode 100644
index 0000000000000000000000000000000000000000..3d3afb733e87ee2b2f089ba10b2bc08e5186740a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_155.txt
@@ -0,0 +1,37 @@
+<Altitude Tracking, connectedTo, Voice Guidance Customization>
+<Dead Reckoning, connectedTo, Points of Interest Search>
+<Dead Reckoning, partOf, Personalized Route Preferences>
+<ETA Estimation, connectedTo, Hazard Alerts>
+<ETA Estimation, partOf, Pedestrian Navigation>
+<Hazard Alerts, connectedTo, Multi_modal Navigation>
+<Hazard Alerts, partOf, Pedestrian Navigation>
+<Indoor Navigation, connectedTo, Marine Charting>
+<Indoor Navigation, connectedTo, Satellite Navigation Systems>
+<Indoor Navigation, connectedTo, Voice Guidance Customization>
+<Inertial Navigation System, connectedTo, Altitude Tracking>
+<Inertial Navigation System, connectedTo, Voice Guidance Customization>
+<Lane Guidance, connectedTo, ETA Estimation>
+<Lane Guidance, partOf, Pedestrian Navigation>
+<Map Display, connectedTo, Inertial Navigation System>
+<Marine Charting, connectedTo, Navigation Data Update>
+<Marine Charting, connectedTo, Satellite Navigation Systems>
+<Multi_modal Navigation, connectedTo, Voice Guidance Customization>
+<Multi_modal Navigation, partOf, Pedestrian Navigation>
+<Navigation Data Update, connectedTo, Dead Reckoning>
+<Navigation Data Update, connectedTo, Satellite Navigation Systems>
+<Points of Interest Search, connectedTo, Reverse Geocoding>
+<Points of Interest Search, partOf, Personalized Route Preferences>
+<Public Transit Navigation, connectedTo, Inertial Navigation System>
+<Public Transit Navigation, connectedTo, Map Display>
+<Public Transit Navigation, connectedTo, Offline Map Support>
+<Public Transit Navigation, connectedTo, Real_Time Re_routing>
+<Public Transit Navigation, connectedTo, Voice Guidance Customization>
+<Real_Time Re_routing, connectedTo, Offline Map Support>
+<Reverse Geocoding, connectedTo, Marine Charting>
+<Reverse Geocoding, partOf, Personalized Route Preferences>
+<Satellite Navigation Systems, connectedTo, Lane Guidance>
+<Satellite Navigation Systems, connectedTo, Public Transit Navigation>
+<Voice Guidance Customization, connectedTo, Real_Time Re_routing>
+<start, connectedTo, Indoor Navigation>
+<start, connectedTo, Satellite Navigation Systems>
+<start, connectedTo, Voice Guidance Customization>
diff --git a/test/mermaid/hard/mermaid_156.mmd b/test/mermaid/hard/mermaid_156.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..323243dd2f785a4f2e862a29ce0882b6d7501a00
--- /dev/null
+++ b/test/mermaid/hard/mermaid_156.mmd
@@ -0,0 +1,124 @@
+graph LR
+    N0([start])
+    N1[/Altitude Tracking/]
+    N2{Satellite Navigation Systems}
+    N3(Dead Reckoning)
+    N4(Aeronautical Charting)
+    N5[(Indoor Navigation)]
+    N6{Inertial Navigation System}
+    N7[Map Display]
+    N8[Lane Guidance]
+    N9(Historical Traffic Data Analysis)
+    N10[(Terrestrial Navigation)]
+    N11([Real_Time Re_routing])
+    N12{Autonomous Vehicle Navigation}
+    N13{Celestial Navigation}
+    N14[Points of Interest Search]
+    N15[(Reverse Geocoding)]
+    N16[Waypoint Setting]
+    N17([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Bearing and Distance Calculation
+        nest0_0[(ETA Estimation)]
+        nest0_1[Geofencing]
+        nest0_2[(Location_Based Services)]
+        nest0_3([Offline Map Support])
+    end
+    subgraph Turn_by_Turn Directions
+        nest1_0[(Marine Charting)]
+        nest1_1([Hazard Alerts])
+    end
+    N0 -.-> |no| N1
+    N1 -.-> N2
+    N2 --> |no| N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> |no| N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> |no| N13
+    N13 -.-> N14
+    N14 -.-> N15
+    N15 -.-> N16
+    N16 -.-> N17
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N15 -.-> nest0_0
+    nest0_3 -.-> N13
+    nest1_0 -.-> nest1_1
+    N4 --> nest1_0
+    nest1_1 --> N16
+    N1 --> S0
+    S0 -.-> N13
+    S0 --> N8
+    N2 -.-> S1
+    S1 --> N6
+    S1 -.-> N12
+    S1 -.-> |yes| N16
+    N8 --> S2
+    S2 -.-> N13
+    S2 -.-> |no| N11
+    S2 -.-> N12
+    N10 --> M0
+    N9 -.-> M0
+    M0 --> N13
+    N1 --> M1
+    N0 -.-> M1
+    M1 --> N3
+    style S0 fill:#F6F6F6,stroke:#CFCFCF
+    style S1 fill:#E1BEE7,stroke:#9C27B0
+    style S2 fill:#F6F6F6,stroke:#CFCFCF
+    style M0 fill:#E1BEE7,stroke:#9C27B0
+    style M1 fill:#F6F6F6,stroke:#CFCFCF
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#BA68C8,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_156.txt b/test/mermaid/hard/mermaid_156.txt
new file mode 100644
index 0000000000000000000000000000000000000000..14e09e22eec4a78d13e5e4007d8b62a2153ecfae
--- /dev/null
+++ b/test/mermaid/hard/mermaid_156.txt
@@ -0,0 +1,43 @@
+<Aeronautical Charting, connectedTo, Indoor Navigation>
+<Aeronautical Charting, connectedTo, Marine Charting>
+<Altitude Tracking, connectedTo, Celestial Navigation>
+<Altitude Tracking, connectedTo, Dead Reckoning>
+<Altitude Tracking, connectedTo, Lane Guidance>
+<Altitude Tracking, connectedTo, Satellite Navigation Systems>
+<Autonomous Vehicle Navigation, no, Celestial Navigation>
+<Celestial Navigation, connectedTo, Points of Interest Search>
+<Dead Reckoning, connectedTo, Aeronautical Charting>
+<ETA Estimation, connectedTo, Geofencing>
+<ETA Estimation, partOf, Bearing and Distance Calculation>
+<Geofencing, connectedTo, Location_Based Services>
+<Geofencing, partOf, Bearing and Distance Calculation>
+<Hazard Alerts, connectedTo, Waypoint Setting>
+<Hazard Alerts, partOf, Turn_by_Turn Directions>
+<Historical Traffic Data Analysis, connectedTo, Celestial Navigation>
+<Historical Traffic Data Analysis, connectedTo, Terrestrial Navigation>
+<Indoor Navigation, no, Inertial Navigation System>
+<Inertial Navigation System, connectedTo, Map Display>
+<Lane Guidance, connectedTo, Autonomous Vehicle Navigation>
+<Lane Guidance, connectedTo, Celestial Navigation>
+<Lane Guidance, connectedTo, Historical Traffic Data Analysis>
+<Lane Guidance, no, Real_Time Re_routing>
+<Location_Based Services, connectedTo, Offline Map Support>
+<Location_Based Services, partOf, Bearing and Distance Calculation>
+<Map Display, connectedTo, Lane Guidance>
+<Marine Charting, connectedTo, Hazard Alerts>
+<Marine Charting, partOf, Turn_by_Turn Directions>
+<Offline Map Support, connectedTo, Celestial Navigation>
+<Offline Map Support, partOf, Bearing and Distance Calculation>
+<Points of Interest Search, connectedTo, Reverse Geocoding>
+<Real_Time Re_routing, connectedTo, Autonomous Vehicle Navigation>
+<Reverse Geocoding, connectedTo, ETA Estimation>
+<Reverse Geocoding, connectedTo, Waypoint Setting>
+<Satellite Navigation Systems, connectedTo, Autonomous Vehicle Navigation>
+<Satellite Navigation Systems, connectedTo, Inertial Navigation System>
+<Satellite Navigation Systems, no, Dead Reckoning>
+<Satellite Navigation Systems, yes, Waypoint Setting>
+<Terrestrial Navigation, connectedTo, Celestial Navigation>
+<Terrestrial Navigation, connectedTo, Real_Time Re_routing>
+<Waypoint Setting, connectedTo, end>
+<start, connectedTo, Dead Reckoning>
+<start, no, Altitude Tracking>
diff --git a/test/mermaid/hard/mermaid_157.mmd b/test/mermaid/hard/mermaid_157.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..9ceb7239540e2c7405995dd0c9f4c75d0ba803ff
--- /dev/null
+++ b/test/mermaid/hard/mermaid_157.mmd
@@ -0,0 +1,132 @@
+graph LR
+    N0([4D Printing])
+    N1[[Scaffolding for Tissue Engineering]]
+    N2[[3D Printed Tooling]]
+    N3[(Material Research and Development)]
+    N4{Fused Deposition Modeling}
+    N5[Aerospace Part Production]
+    N6(Stereolithography)
+    N7([Distributed Manufacturing])
+    N8([Selective Laser Sintering])
+    N9[Construction 3D Printing]
+    N10[Direct Metal Laser Sintering]
+    N11[(On_Demand Production)]
+    N12[(Slicing Software Operation)]
+    N13[(Maintenance and Repair of Printers)]
+    N14[[Mass Customization]]
+    N15([Educational Applications])
+    S0(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Food Printing
+        nest0_0(Custom Part Production)
+        nest0_1(Digital Twin for 3D Prints)
+        nest0_2{File Format Conversion}
+    end
+    subgraph Printing Process
+        nest1_0(Consumer Product Creation)
+        nest1_1(Quality Control)
+        nest1_2[(Bioprinting)]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N10 -.-> nest0_0
+    nest0_2 --> N15
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N11 --> nest1_0
+    nest1_2 --> N7
+    N10 --> S0
+    S0 -.-> N14
+    S0 --> N13
+    N1 --> S2
+    S2 -.-> N3
+    S2 --> N9
+    N4 --> M0
+    N8 --> M0
+    N6 -.-> M0
+    M0 --> N10
+    N0 -.-> |shares| M1
+    N2 --> M1
+    N4 -.-> M1
+    M1 --> N6
+    style N0 fill:#DFE7EB,stroke:#B0C5CD
+    style N1 fill:#FFFDE7,stroke:#FBC02D
+    style N2 fill:#DFE7EB,stroke:#B0C5CD
+    style N3 fill:#E6EE9C,stroke:#CDDC39
+    style N4 fill:#FFFDE7,stroke:#FBC02D
+    style N5 fill:#DFE7EB,stroke:#B0C5CD
+    style N6 fill:#DFE7EB,stroke:#B0C5CD
+    style N7 fill:#FFFDE7,stroke:#FBC02D
+    style N8 fill:#E6EE9C,stroke:#CDDC39
+    style N9 fill:#E6EE9C,stroke:#CDDC39
+    style N10 fill:#DFE7EB,stroke:#B0C5CD
+    style N11 fill:#FFFDE7,stroke:#FBC02D
+    style N12 fill:#FFFDE7,stroke:#FBC02D
+    style N13 fill:#E6EE9C,stroke:#CDDC39
+    style N14 fill:#DFE7EB,stroke:#B0C5CD
+    style N15 fill:#E6EE9C,stroke:#CDDC39
+    style S0 fill:#DFE7EB,stroke:#B0C5CD
+    style S2 fill:#FFFDE7,stroke:#FBC02D
+    style M0 fill:#DFE7EB,stroke:#B0C5CD
+    style M1 fill:#E6EE9C,stroke:#CDDC39
+    style nest0_0 fill:#FFFDE7,stroke:#FBC02D
+    style nest0_1 fill:#DFE7EB,stroke:#B0C5CD
+    style nest0_2 fill:#E6EE9C,stroke:#CDDC39
+    style nest1_0 fill:#E6EE9C,stroke:#CDDC39
+    style nest1_1 fill:#FFFDE7,stroke:#FBC02D
+    style nest1_2 fill:#E6EE9C,stroke:#CDDC39
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#CDDC39,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_158.txt b/test/mermaid/hard/mermaid_158.txt
new file mode 100644
index 0000000000000000000000000000000000000000..db83c8856269658ba192b56ef0c61617dea2684d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_158.txt
@@ -0,0 +1,35 @@
+<3D Printed Tooling, connectedTo, Support Structure Design>
+<3D Printed Tooling, partOf, Post_Processing>
+<Additive Manufacturing, connectedTo, Material Selection>
+<Additive Manufacturing, partOf, Post_Processing>
+<Construction 3D Printing, connectedTo, Custom Part Production>
+<Distributed Manufacturing, connectedTo, Scaffolding for Tissue Engineering>
+<Distributed Manufacturing, connectedTo, Stereolithography>
+<File Format Conversion, connectedTo, Custom Part Production>
+<File Format Conversion, partOf, Food Printing>
+<Fused Deposition Modeling, connectedTo, Construction 3D Printing>
+<Fused Deposition Modeling, connectedTo, Custom Part Production>
+<Fused Deposition Modeling, connectedTo, Distributed Manufacturing>
+<Fused Deposition Modeling, connectedTo, Stereolithography>
+<Fused Deposition Modeling, designs, Scaffolding for Tissue Engineering>
+<Material Selection, connectedTo, Stereolithography>
+<Material Selection, partOf, Post_Processing>
+<Multi_Material Printing, connectedTo, Custom Part Production>
+<Multi_Material Printing, connectedTo, On_Demand Production>
+<Multi_Material Printing, connectedTo, Stereolithography>
+<On_Demand Production, connectedTo, Fused Deposition Modeling>
+<On_Demand Production, connectedTo, Stereolithography>
+<Quality Control, connectedTo, File Format Conversion>
+<Quality Control, partOf, Food Printing>
+<Scaffolding for Tissue Engineering, connectedTo, Custom Part Production>
+<Scaffolding for Tissue Engineering, connectedTo, Quality Control>
+<Scaffolding for Tissue Engineering, slices, Stereolithography>
+<Stereolithography, connectedTo, 3D Printed Tooling>
+<Stereolithography, connectedTo, Construction 3D Printing>
+<Support Structure Design, connectedTo, Additive Manufacturing>
+<Support Structure Design, partOf, Post_Processing>
+<start, connectedTo, Custom Part Production>
+<start, connectedTo, Distributed Manufacturing>
+<start, connectedTo, Fused Deposition Modeling>
+<start, connectedTo, Multi_Material Printing>
+<start, connectedTo, Scaffolding for Tissue Engineering>
diff --git a/test/mermaid/hard/mermaid_159.mmd b/test/mermaid/hard/mermaid_159.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..2e5d7b3fb510d46915c7b38e1f4b2e9aeb9d35ad
--- /dev/null
+++ b/test/mermaid/hard/mermaid_159.mmd
@@ -0,0 +1,134 @@
+graph BT
+    N0([Prototyping])
+    N1(Consumer Product Creation)
+    N2([Print Farm Management])
+    N3(Fused Deposition Modeling)
+    N4[[3D Printed Tooling]]
+    N5[[Multi_Material Printing]]
+    N6{Sustainable 3D Printing Materials}
+    N7(Post_Processing)
+    N8[Medical Device Prototyping]
+    N9([Bioprinting])
+    N10[[Rapid Manufacturing]]
+    N11[Construction 3D Printing]
+    N12(Scaffolding for Tissue Engineering)
+    N13([Intellectual Property Protection for Designs])
+    N14([Aerospace Part Production])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Additive Manufacturing
+        nest0_0(Printer Setup)
+        nest0_1[(Material Research and Development)]
+    end
+    subgraph Digital Twin for 3D Prints
+        nest1_0[3D Model Design]
+        nest1_1[/Educational Applications/]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> |replicates| N3
+    N3 -.-> |manufactures| N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    N10 --> N11
+    N11 --> |protects| N12
+    N12 --> N13
+    N13 -.-> N14
+    nest0_0 --> nest0_1
+    N5 --> nest0_0
+    nest0_1 -.-> |automates| N9
+    nest1_0 -.-> nest1_1
+    N2 -.-> nest1_0
+    nest1_1 --> N12
+    N0 --> S0
+    S0 --> |validates| N3
+    S0 --> N11
+    N2 --> S1
+    S1 --> N4
+    S1 --> N14
+    S1 --> N9
+    N5 -.-> S2
+    S2 -.-> N14
+    S2 -.-> N7
+    S2 -.-> N12
+    S2 -.-> N8
+    N8 -.-> M0
+    N3 --> |shares| M0
+    N4 --> M0
+    N1 --> |researches| M0
+    M0 -.-> N11
+    N2 -.-> M1
+    N0 --> M1
+    M1 --> N7
+    style N0 fill:#EDF5F3,stroke:#A1D7CD
+    style N1 fill:#FFE0B2,stroke:#FF9800
+    style N2 fill:#FFE0B2,stroke:#FF9800
+    style N3 fill:#FFE0B2,stroke:#FF9800
+    style N4 fill:#EDF5F3,stroke:#A1D7CD
+    style N5 fill:#FFE0B2,stroke:#FF9800
+    style N6 fill:#FFE0B2,stroke:#FF9800
+    style N7 fill:#EDF5F3,stroke:#A1D7CD
+    style N8 fill:#FFE0B2,stroke:#FF9800
+    style N9 fill:#FFE0B2,stroke:#FF9800
+    style N10 fill:#FFE0B2,stroke:#FF9800
+    style N11 fill:#EDF5F3,stroke:#A1D7CD
+    style N12 fill:#EDF5F3,stroke:#A1D7CD
+    style N13 fill:#FFE0B2,stroke:#FF9800
+    style N14 fill:#EDF5F3,stroke:#A1D7CD
+    style S0 fill:#EDE7F6,stroke:#7E57C2
+    style S1 fill:#EDE7F6,stroke:#7E57C2
+    style S2 fill:#EDE7F6,stroke:#7E57C2
+    style M0 fill:#EDF5F3,stroke:#A1D7CD
+    style M1 fill:#EDF5F3,stroke:#A1D7CD
+    style nest0_0 fill:#EDF5F3,stroke:#A1D7CD
+    style nest0_1 fill:#EDF5F3,stroke:#A1D7CD
+    style nest1_0 fill:#EDE7F6,stroke:#7E57C2
+    style nest1_1 fill:#EDF5F3,stroke:#A1D7CD
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#7E57C2,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_159.txt b/test/mermaid/hard/mermaid_159.txt
new file mode 100644
index 0000000000000000000000000000000000000000..a6a8f45dca736f67a07dd32f8c431a0086ed4b8c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_159.txt
@@ -0,0 +1,39 @@
+<3D Model Design, connectedTo, Educational Applications>
+<3D Model Design, partOf, Digital Twin for 3D Prints>
+<3D Printed Tooling, connectedTo, Construction 3D Printing>
+<3D Printed Tooling, connectedTo, Multi_Material Printing>
+<Bioprinting, connectedTo, Rapid Manufacturing>
+<Construction 3D Printing, protects, Scaffolding for Tissue Engineering>
+<Consumer Product Creation, connectedTo, Print Farm Management>
+<Consumer Product Creation, researches, Construction 3D Printing>
+<Educational Applications, connectedTo, Scaffolding for Tissue Engineering>
+<Educational Applications, partOf, Digital Twin for 3D Prints>
+<Fused Deposition Modeling, manufactures, 3D Printed Tooling>
+<Fused Deposition Modeling, shares, Construction 3D Printing>
+<Intellectual Property Protection for Designs, connectedTo, Aerospace Part Production>
+<Material Research and Development, automates, Bioprinting>
+<Material Research and Development, partOf, Additive Manufacturing>
+<Medical Device Prototyping, connectedTo, Bioprinting>
+<Medical Device Prototyping, connectedTo, Construction 3D Printing>
+<Multi_Material Printing, connectedTo, Aerospace Part Production>
+<Multi_Material Printing, connectedTo, Medical Device Prototyping>
+<Multi_Material Printing, connectedTo, Post_Processing>
+<Multi_Material Printing, connectedTo, Printer Setup>
+<Multi_Material Printing, connectedTo, Scaffolding for Tissue Engineering>
+<Multi_Material Printing, connectedTo, Sustainable 3D Printing Materials>
+<Post_Processing, connectedTo, Medical Device Prototyping>
+<Print Farm Management, connectedTo, 3D Model Design>
+<Print Farm Management, connectedTo, 3D Printed Tooling>
+<Print Farm Management, connectedTo, Aerospace Part Production>
+<Print Farm Management, connectedTo, Bioprinting>
+<Print Farm Management, connectedTo, Post_Processing>
+<Print Farm Management, replicates, Fused Deposition Modeling>
+<Printer Setup, connectedTo, Material Research and Development>
+<Printer Setup, partOf, Additive Manufacturing>
+<Prototyping, connectedTo, Construction 3D Printing>
+<Prototyping, connectedTo, Consumer Product Creation>
+<Prototyping, connectedTo, Post_Processing>
+<Prototyping, validates, Fused Deposition Modeling>
+<Rapid Manufacturing, connectedTo, Construction 3D Printing>
+<Scaffolding for Tissue Engineering, connectedTo, Intellectual Property Protection for Designs>
+<Sustainable 3D Printing Materials, connectedTo, Post_Processing>
diff --git a/test/mermaid/hard/mermaid_160.txt b/test/mermaid/hard/mermaid_160.txt
new file mode 100644
index 0000000000000000000000000000000000000000..812cf70527e391d11299dc6bfcad4558246d64a9
--- /dev/null
+++ b/test/mermaid/hard/mermaid_160.txt
@@ -0,0 +1,32 @@
+<Advanced Materials Research, partOf, Surface Functionalization>
+<Advanced Materials Research, purifies, Drug Delivery Systems>
+<Bio_Nanotechnology Interface, connectedTo, Lab_on_a_Chip Devices>
+<Bio_Nanotechnology Interface, connectedTo, Nanofabrication Techniques>
+<Bio_Nanotechnology Interface, connectedTo, Public Perception of Nanotechnology>
+<Biosensors, connectedTo, Nanotoxicology>
+<Biosensors, partOf, Spintronics>
+<Drug Delivery Systems, connectedTo, Graphene Production>
+<Drug Delivery Systems, partOf, Surface Functionalization>
+<Energy Storage Applications, connectedTo, Bio_Nanotechnology Interface>
+<Energy Storage Applications, connectedTo, Quantum Computing Integration>
+<Energy Storage Applications, protects, Public Perception of Nanotechnology>
+<Food Packaging Improvement, connectedTo, Advanced Materials Research>
+<Food Packaging Improvement, connectedTo, Scanning Electron Microscopy>
+<Graphene Production, connectedTo, Bio_Nanotechnology Interface>
+<Graphene Production, connectedTo, Public Perception of Nanotechnology>
+<Lab_on_a_Chip Devices, connectedTo, Public Perception of Nanotechnology>
+<Nanofabrication Techniques, develops, Nanomaterial Synthesis>
+<Nanofabrication Techniques, partOf, Spintronics>
+<Nanomaterial Synthesis, connectedTo, Biosensors>
+<Nanomaterial Synthesis, partOf, Spintronics>
+<Nanotoxicology, connectedTo, Bio_Nanotechnology Interface>
+<Nanotoxicology, partOf, Spintronics>
+<Photovoltaics, connectedTo, Regulatory Framework for Nanotech>
+<Public Perception of Nanotechnology, connectedTo, Photovoltaics>
+<Public Perception of Nanotechnology, connectedTo, Regulatory Framework for Nanotech>
+<Public Perception of Nanotechnology, connectedTo, X_ray Diffraction>
+<Quantum Computing Integration, commercializes, Graphene Production>
+<Regulatory Framework for Nanotech, connectedTo, X_ray Diffraction>
+<Scanning Electron Microscopy, connectedTo, Bio_Nanotechnology Interface>
+<Scanning Electron Microscopy, connectedTo, Energy Storage Applications>
+<start, connectedTo, Food Packaging Improvement>
diff --git a/test/mermaid/hard/mermaid_161.mmd b/test/mermaid/hard/mermaid_161.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..31319f0456f1dbd812d10e59b164799c8180b921
--- /dev/null
+++ b/test/mermaid/hard/mermaid_161.mmd
@@ -0,0 +1,136 @@
+graph LR
+    N0([start])
+    N1(Nanoelectronics)
+    N2[[Computational Nanotechnology]]
+    N3([Bio_Nanotechnology Interface])
+    N4(Water Purification using Nanomaterials)
+    N5[(Food Packaging Improvement)]
+    N6[Nanoscale Imaging]
+    N7[(Advanced Materials Research)]
+    N8[Energy Storage Applications]
+    N9[Public Perception of Nanotechnology]
+    N10{Nanofabrication Techniques}
+    N11(Catalysis at Nanoscale)
+    N12[Risk Assessment of Nanomaterials]
+    N13[[Spectroscopy]]
+    N14([Lab_on_a_Chip Devices])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Scanning Electron Microscopy
+        nest0_0[Transmission Electron Microscopy]
+        nest0_1[Nanotoxicology]
+        nest0_2[[Drug Delivery Systems]]
+    end
+    subgraph Surface Functionalization
+        nest1_0{Nanomaterial Synthesis}
+        nest1_1([Nanomedicine Development])
+        nest1_2([Quantum Dots])
+        nest1_3[[Solar Cell Efficiency Enhancement]]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> |complies| N4
+    N4 --> |deposits| N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 --> N13
+    N13 --> N14
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N8 -.-> nest0_0
+    nest0_2 -.-> N3
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> |controls| nest1_3
+    N4 -.-> nest1_0
+    nest1_3 --> N10
+    N4 -.-> S0
+    S0 -.-> N7
+    S0 --> N13
+    S0 --> N8
+    N6 -.-> S1
+    S1 --> |assembles| N12
+    S1 -.-> N13
+    N10 -.-> S2
+    S2 -.-> N14
+    S2 -.-> N12
+    S2 --> N13
+    N2 --> M1
+    N5 --> M1
+    N3 --> M1
+    N4 -.-> M1
+    M1 -.-> N8
+    style N0 fill:#C8E6C9,stroke:#4CAF50
+    style N1 fill:#D6D9F0,stroke:#9FA9E1
+    style N2 fill:#C8E6C9,stroke:#4CAF50
+    style N3 fill:#D6D9F0,stroke:#9FA9E1
+    style N4 fill:#D6D9F0,stroke:#9FA9E1
+    style N5 fill:#F3E5F5,stroke:#BA68C8
+    style N6 fill:#C8E6C9,stroke:#4CAF50
+    style N7 fill:#C8E6C9,stroke:#4CAF50
+    style N8 fill:#C8E6C9,stroke:#4CAF50
+    style N9 fill:#F3E5F5,stroke:#BA68C8
+    style N10 fill:#F3E5F5,stroke:#BA68C8
+    style N11 fill:#D6D9F0,stroke:#9FA9E1
+    style N12 fill:#C8E6C9,stroke:#4CAF50
+    style N13 fill:#F3E5F5,stroke:#BA68C8
+    style N14 fill:#D6D9F0,stroke:#9FA9E1
+    style S0 fill:#C8E6C9,stroke:#4CAF50
+    style S1 fill:#D6D9F0,stroke:#9FA9E1
+    style S2 fill:#C8E6C9,stroke:#4CAF50
+    style M1 fill:#D6D9F0,stroke:#9FA9E1
+    style nest0_0 fill:#F3E5F5,stroke:#BA68C8
+    style nest0_1 fill:#F3E5F5,stroke:#BA68C8
+    style nest0_2 fill:#F3E5F5,stroke:#BA68C8
+    style nest1_0 fill:#F3E5F5,stroke:#BA68C8
+    style nest1_1 fill:#D6D9F0,stroke:#9FA9E1
+    style nest1_2 fill:#F3E5F5,stroke:#BA68C8
+    style nest1_3 fill:#C8E6C9,stroke:#4CAF50
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_162.mmd b/test/mermaid/hard/mermaid_162.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..9e13755f77c82a8f52c2ba42b7e6b7a67dd85859
--- /dev/null
+++ b/test/mermaid/hard/mermaid_162.mmd
@@ -0,0 +1,134 @@
+graph LR
+    N0([start])
+    N1[/Photovoltaics/]
+    N2([Quantum Dots])
+    N3[(Molecular Self_Assembly)]
+    N4{Carbon Nanotube Synthesis}
+    N5[/Nanotoxicology/]
+    N6[[Bio_Nanotechnology Interface]]
+    N7(Advanced Materials Research)
+    N8[/Surface Functionalization/]
+    N9[[Energy Storage Applications]]
+    N10[/X_ray Diffraction/]
+    N11[(Quantum Computing Integration)]
+    N12[Drug Delivery Systems]
+    N13[Nanomaterial Synthesis]
+    N14(Spintronics)
+    N15([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Nanodevice Fabrication
+        nest0_0{Water Purification using Nanomaterials}
+        nest0_1[Food Packaging Improvement]
+        nest0_2[Public Perception of Nanotechnology]
+        nest0_3(Environmental Remediation with Nanomaterials)
+    end
+    subgraph Nanofabrication Techniques
+        nest1_0(Ethical Implications of Nanotech)
+        nest1_1[/Nanomedicine Development/]
+        nest1_2[(Catalysis at Nanoscale)]
+    end
+    N0 --> N1
+    N1 --> |visualizes| N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> |delivers| N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 -.-> |synthesizes| N15
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N1 --> nest0_0
+    nest0_3 -.-> N13
+    nest1_0 -.-> nest1_1
+    nest1_1 --> |integrates| nest1_2
+    N4 --> nest1_0
+    nest1_2 -.-> |models| N4
+    N12 -.-> S0
+    S0 --> N15
+    S0 -.-> N14
+    N5 -.-> S1
+    S1 --> N15
+    S1 --> N12
+    N1 -.-> M0
+    N0 --> M0
+    M0 -.-> N6
+    N5 -.-> M1
+    N1 --> M1
+    N7 --> M1
+    M1 -.-> N9
+    style N0 fill:#FFDCD6,stroke:#FFB2A5
+    style N1 fill:#FFDCD6,stroke:#FFB2A5
+    style N2 fill:#FFFDE7,stroke:#FBC02D
+    style N3 fill:#FFDCD6,stroke:#FFB2A5
+    style N4 fill:#FCE4EC,stroke:#F06292
+    style N5 fill:#FCE4EC,stroke:#F06292
+    style N6 fill:#FCE4EC,stroke:#F06292
+    style N7 fill:#FFFDE7,stroke:#FBC02D
+    style N8 fill:#FFFDE7,stroke:#FBC02D
+    style N9 fill:#FCE4EC,stroke:#F06292
+    style N10 fill:#FFDCD6,stroke:#FFB2A5
+    style N11 fill:#FFFDE7,stroke:#FBC02D
+    style N12 fill:#FFFDE7,stroke:#FBC02D
+    style N13 fill:#FFFDE7,stroke:#FBC02D
+    style N14 fill:#FFFDE7,stroke:#FBC02D
+    style N15 fill:#FFFDE7,stroke:#FBC02D
+    style S0 fill:#FFDCD6,stroke:#FFB2A5
+    style S1 fill:#FFDCD6,stroke:#FFB2A5
+    style M0 fill:#FCE4EC,stroke:#F06292
+    style M1 fill:#FFDCD6,stroke:#FFB2A5
+    style nest0_0 fill:#FFFDE7,stroke:#FBC02D
+    style nest0_1 fill:#FCE4EC,stroke:#F06292
+    style nest0_2 fill:#FFFDE7,stroke:#FBC02D
+    style nest0_3 fill:#FFDCD6,stroke:#FFB2A5
+    style nest1_0 fill:#FFDCD6,stroke:#FFB2A5
+    style nest1_1 fill:#FFFDE7,stroke:#FBC02D
+    style nest1_2 fill:#FFFDE7,stroke:#FBC02D
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#F06292,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_162.txt b/test/mermaid/hard/mermaid_162.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c0d779fbc637f6122a207fb9919b6c9b1cff301e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_162.txt
@@ -0,0 +1,40 @@
+<Advanced Materials Research, connectedTo, Energy Storage Applications>
+<Advanced Materials Research, connectedTo, Surface Functionalization>
+<Bio_Nanotechnology Interface, delivers, Advanced Materials Research>
+<Carbon Nanotube Synthesis, connectedTo, Ethical Implications of Nanotech>
+<Carbon Nanotube Synthesis, connectedTo, Nanotoxicology>
+<Catalysis at Nanoscale, models, Carbon Nanotube Synthesis>
+<Catalysis at Nanoscale, partOf, Nanofabrication Techniques>
+<Drug Delivery Systems, connectedTo, Nanomaterial Synthesis>
+<Drug Delivery Systems, connectedTo, Spintronics>
+<Drug Delivery Systems, connectedTo, end>
+<Energy Storage Applications, connectedTo, X_ray Diffraction>
+<Environmental Remediation with Nanomaterials, connectedTo, Nanomaterial Synthesis>
+<Environmental Remediation with Nanomaterials, partOf, Nanodevice Fabrication>
+<Ethical Implications of Nanotech, connectedTo, Nanomedicine Development>
+<Ethical Implications of Nanotech, partOf, Nanofabrication Techniques>
+<Food Packaging Improvement, connectedTo, Public Perception of Nanotechnology>
+<Food Packaging Improvement, partOf, Nanodevice Fabrication>
+<Molecular Self_Assembly, connectedTo, Carbon Nanotube Synthesis>
+<Nanomaterial Synthesis, connectedTo, Spintronics>
+<Nanomedicine Development, integrates, Catalysis at Nanoscale>
+<Nanomedicine Development, partOf, Nanofabrication Techniques>
+<Nanotoxicology, connectedTo, Bio_Nanotechnology Interface>
+<Nanotoxicology, connectedTo, Drug Delivery Systems>
+<Nanotoxicology, connectedTo, Energy Storage Applications>
+<Nanotoxicology, connectedTo, end>
+<Photovoltaics, connectedTo, Bio_Nanotechnology Interface>
+<Photovoltaics, connectedTo, Energy Storage Applications>
+<Photovoltaics, connectedTo, Water Purification using Nanomaterials>
+<Photovoltaics, visualizes, Quantum Dots>
+<Public Perception of Nanotechnology, connectedTo, Environmental Remediation with Nanomaterials>
+<Public Perception of Nanotechnology, partOf, Nanodevice Fabrication>
+<Quantum Computing Integration, connectedTo, Drug Delivery Systems>
+<Quantum Dots, connectedTo, Molecular Self_Assembly>
+<Spintronics, synthesizes, end>
+<Surface Functionalization, connectedTo, Energy Storage Applications>
+<Water Purification using Nanomaterials, connectedTo, Food Packaging Improvement>
+<Water Purification using Nanomaterials, partOf, Nanodevice Fabrication>
+<X_ray Diffraction, connectedTo, Quantum Computing Integration>
+<start, connectedTo, Bio_Nanotechnology Interface>
+<start, connectedTo, Photovoltaics>
diff --git a/test/mermaid/hard/mermaid_163.mmd b/test/mermaid/hard/mermaid_163.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..d30898e2853c87672d278d2fbc55f88e355e7b4c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_163.mmd
@@ -0,0 +1,107 @@
+graph TD
+    N0([start])
+    N1(Quantum Bit Design)
+    N2[[Quantum Communication Protocols]]
+    N3[[Quantum Error Correction]]
+    N4{Vacuum Systems for Trapped Ions}
+    N5{Optimization Problems with Quantum Annealing}
+    N6(Post_Quantum Cryptography)
+    N7(Quantum Annealing)
+    N8[(Quantum Advantage Demonstration)]
+    N9{Quantum Computing Benchmarking}
+    N10(Quantum Computing for AI)
+    N11[Financial Modeling with Quantum Computing]
+    N12{Quantum Software Development Kit}
+    N13[Trapped Ion Qubits]
+    N14(Quantum Cryptography)
+    N15([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Decoherence Mitigation
+        nest0_0[[Quantum Teleportation Research]]
+        nest0_1[/Quantum Network Development/]
+        nest0_2([Quantum Supremacy Claims])
+    end
+    subgraph Microwave Control for Qubits
+        nest1_0[Quantum Processor Fabrication]
+        nest1_1[[Laser Cooling for Ions]]
+    end
+    N0 -.-> N1
+    N1 --> |yes| N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 --> N11
+    N11 --> N12
+    N12 -.-> |no| N13
+    N13 --> N14
+    N14 -.-> N15
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    N3 -.-> nest0_0
+    nest0_2 -.-> N13
+    nest1_0 -.-> nest1_1
+    N4 -.-> nest1_0
+    nest1_1 --> |yes| N14
+    N2 --> S0
+    S0 --> N6
+    S0 -.-> N11
+    S0 -.-> N4
+    N6 -.-> S1
+    S1 -.-> N10
+    S1 --> |no| N14
+    N1 -.-> M0
+    N0 --> M0
+    N2 -.-> |yes| M0
+    M0 -.-> N4
+    N0 -.-> M1
+    N1 -.-> M1
+    M1 --> N3
+    style S0 fill:#FFEBEE,stroke:#E57373
+    style S1 fill:#FFF3E0,stroke:#FFA726
+    style M0 fill:#F0F0F0,stroke:#D2D2D2
+    style M1 fill:#F0F0F0,stroke:#D2D2D2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#D2D2D2,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_163.txt b/test/mermaid/hard/mermaid_163.txt
new file mode 100644
index 0000000000000000000000000000000000000000..bc6124585f1ca63de49a48685940e68fe8f664ae
--- /dev/null
+++ b/test/mermaid/hard/mermaid_163.txt
@@ -0,0 +1,37 @@
+<Financial Modeling with Quantum Computing, connectedTo, Quantum Software Development Kit>
+<Laser Cooling for Ions, partOf, Microwave Control for Qubits>
+<Laser Cooling for Ions, yes, Quantum Cryptography>
+<Optimization Problems with Quantum Annealing, connectedTo, Post_Quantum Cryptography>
+<Post_Quantum Cryptography, connectedTo, Quantum Annealing>
+<Post_Quantum Cryptography, connectedTo, Quantum Computing for AI>
+<Post_Quantum Cryptography, no, Quantum Cryptography>
+<Quantum Advantage Demonstration, connectedTo, Quantum Computing Benchmarking>
+<Quantum Annealing, connectedTo, Quantum Advantage Demonstration>
+<Quantum Bit Design, connectedTo, Quantum Error Correction>
+<Quantum Bit Design, connectedTo, Vacuum Systems for Trapped Ions>
+<Quantum Bit Design, yes, Quantum Communication Protocols>
+<Quantum Communication Protocols, connectedTo, Financial Modeling with Quantum Computing>
+<Quantum Communication Protocols, connectedTo, Post_Quantum Cryptography>
+<Quantum Communication Protocols, connectedTo, Quantum Error Correction>
+<Quantum Communication Protocols, connectedTo, Vacuum Systems for Trapped Ions>
+<Quantum Communication Protocols, yes, Vacuum Systems for Trapped Ions>
+<Quantum Computing Benchmarking, connectedTo, Quantum Computing for AI>
+<Quantum Computing for AI, connectedTo, Financial Modeling with Quantum Computing>
+<Quantum Cryptography, connectedTo, end>
+<Quantum Error Correction, connectedTo, Quantum Teleportation Research>
+<Quantum Error Correction, connectedTo, Vacuum Systems for Trapped Ions>
+<Quantum Network Development, connectedTo, Quantum Supremacy Claims>
+<Quantum Network Development, partOf, Decoherence Mitigation>
+<Quantum Processor Fabrication, connectedTo, Laser Cooling for Ions>
+<Quantum Processor Fabrication, partOf, Microwave Control for Qubits>
+<Quantum Software Development Kit, no, Trapped Ion Qubits>
+<Quantum Supremacy Claims, connectedTo, Trapped Ion Qubits>
+<Quantum Supremacy Claims, partOf, Decoherence Mitigation>
+<Quantum Teleportation Research, connectedTo, Quantum Network Development>
+<Quantum Teleportation Research, partOf, Decoherence Mitigation>
+<Trapped Ion Qubits, connectedTo, Quantum Cryptography>
+<Vacuum Systems for Trapped Ions, connectedTo, Optimization Problems with Quantum Annealing>
+<Vacuum Systems for Trapped Ions, connectedTo, Quantum Processor Fabrication>
+<start, connectedTo, Quantum Bit Design>
+<start, connectedTo, Quantum Error Correction>
+<start, connectedTo, Vacuum Systems for Trapped Ions>
diff --git a/test/mermaid/hard/mermaid_165.mmd b/test/mermaid/hard/mermaid_165.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..82265c9a795053469838c1bf2329211623e50f5e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_165.mmd
@@ -0,0 +1,122 @@
+graph RL
+    N0([Decoherence Mitigation])
+    N1([Quantum Simulation])
+    N2([Financial Modeling with Quantum Computing])
+    N3([Quantum Supremacy Claims])
+    N4(Quantum Algorithm Development)
+    N5[[Photonic Qubits]]
+    N6[Quantum Error Correction]
+    N7[/Topological Qubits/]
+    N8{Quantum Coherence Management}
+    N9[[Post_Quantum Cryptography]]
+    N10[Quantum Machine Learning]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Quantum Key Distribution
+        nest0_0[(Superconducting Qubits)]
+        nest0_1{Quantum Sensing}
+        nest0_2[/Quantum Programming Languages/]
+        nest0_3[(Quantum Bit Design)]
+    end
+    subgraph Quantum Computing in Drug Discovery
+        nest1_0(Laser Cooling for Ions)
+        nest1_1[(Optimization Problems with Quantum Annealing)]
+        nest1_2[Quantum Annealing]
+        nest1_3[/Quantum Computing Benchmarking/]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> |transmits| N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N4 -.-> nest0_0
+    nest0_3 -.-> N2
+    nest1_0 --> nest1_1
+    nest1_1 --> |controls| nest1_2
+    nest1_2 -.-> nest1_3
+    N1 --> nest1_0
+    nest1_3 -.-> N4
+    N2 --> S0
+    S0 --> N6
+    S0 -.-> N7
+    N4 -.-> S1
+    S1 -.-> N7
+    S1 --> N9
+    S1 -.-> N10
+    S1 --> N8
+    N0 --> M0
+    N1 -.-> M0
+    M0 --> N3
+    N3 -.-> M2
+    N5 -.-> M2
+    N0 --> M2
+    M2 -.-> N8
+    style N0 fill:#FFFDE7,stroke:#FFF176
+    style N1 fill:#CFD8DC,stroke:#607D8B
+    style N2 fill:#C8E6C9,stroke:#4CAF50
+    style N3 fill:#FFFDE7,stroke:#FFF176
+    style N4 fill:#FFFDE7,stroke:#FFF176
+    style N5 fill:#FFFDE7,stroke:#FFF176
+    style N6 fill:#FFFDE7,stroke:#FFF176
+    style N7 fill:#C8E6C9,stroke:#4CAF50
+    style N8 fill:#CFD8DC,stroke:#607D8B
+    style N9 fill:#CFD8DC,stroke:#607D8B
+    style N10 fill:#CFD8DC,stroke:#607D8B
+    style S0 fill:#FFFDE7,stroke:#FFF176
+    style S1 fill:#CFD8DC,stroke:#607D8B
+    style M0 fill:#CFD8DC,stroke:#607D8B
+    style M2 fill:#CFD8DC,stroke:#607D8B
+    style nest0_0 fill:#FFFDE7,stroke:#FFF176
+    style nest0_1 fill:#FFFDE7,stroke:#FFF176
+    style nest0_2 fill:#FFFDE7,stroke:#FFF176
+    style nest0_3 fill:#CFD8DC,stroke:#607D8B
+    style nest1_0 fill:#CFD8DC,stroke:#607D8B
+    style nest1_1 fill:#FFFDE7,stroke:#FFF176
+    style nest1_2 fill:#C8E6C9,stroke:#4CAF50
+    style nest1_3 fill:#CFD8DC,stroke:#607D8B
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#607D8B,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_165.txt b/test/mermaid/hard/mermaid_165.txt
new file mode 100644
index 0000000000000000000000000000000000000000..703463256d9911dd8ed1fe26451ec1509a32065d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_165.txt
@@ -0,0 +1,39 @@
+<Decoherence Mitigation, connectedTo, Quantum Coherence Management>
+<Decoherence Mitigation, connectedTo, Quantum Simulation>
+<Decoherence Mitigation, connectedTo, Quantum Supremacy Claims>
+<Financial Modeling with Quantum Computing, connectedTo, Quantum Error Correction>
+<Financial Modeling with Quantum Computing, connectedTo, Quantum Supremacy Claims>
+<Financial Modeling with Quantum Computing, connectedTo, Topological Qubits>
+<Laser Cooling for Ions, connectedTo, Optimization Problems with Quantum Annealing>
+<Laser Cooling for Ions, partOf, Quantum Computing in Drug Discovery>
+<Optimization Problems with Quantum Annealing, controls, Quantum Annealing>
+<Optimization Problems with Quantum Annealing, partOf, Quantum Computing in Drug Discovery>
+<Photonic Qubits, connectedTo, Quantum Coherence Management>
+<Photonic Qubits, transmits, Quantum Error Correction>
+<Post_Quantum Cryptography, connectedTo, Quantum Machine Learning>
+<Quantum Algorithm Development, connectedTo, Photonic Qubits>
+<Quantum Algorithm Development, connectedTo, Post_Quantum Cryptography>
+<Quantum Algorithm Development, connectedTo, Quantum Coherence Management>
+<Quantum Algorithm Development, connectedTo, Quantum Machine Learning>
+<Quantum Algorithm Development, connectedTo, Superconducting Qubits>
+<Quantum Algorithm Development, connectedTo, Topological Qubits>
+<Quantum Annealing, connectedTo, Quantum Computing Benchmarking>
+<Quantum Annealing, partOf, Quantum Computing in Drug Discovery>
+<Quantum Bit Design, connectedTo, Financial Modeling with Quantum Computing>
+<Quantum Bit Design, partOf, Quantum Key Distribution>
+<Quantum Coherence Management, connectedTo, Post_Quantum Cryptography>
+<Quantum Computing Benchmarking, connectedTo, Quantum Algorithm Development>
+<Quantum Computing Benchmarking, partOf, Quantum Computing in Drug Discovery>
+<Quantum Error Correction, connectedTo, Topological Qubits>
+<Quantum Programming Languages, connectedTo, Quantum Bit Design>
+<Quantum Programming Languages, partOf, Quantum Key Distribution>
+<Quantum Sensing, connectedTo, Quantum Programming Languages>
+<Quantum Sensing, partOf, Quantum Key Distribution>
+<Quantum Simulation, connectedTo, Financial Modeling with Quantum Computing>
+<Quantum Simulation, connectedTo, Laser Cooling for Ions>
+<Quantum Simulation, connectedTo, Quantum Supremacy Claims>
+<Quantum Supremacy Claims, connectedTo, Quantum Algorithm Development>
+<Quantum Supremacy Claims, connectedTo, Quantum Coherence Management>
+<Superconducting Qubits, connectedTo, Quantum Sensing>
+<Superconducting Qubits, partOf, Quantum Key Distribution>
+<Topological Qubits, connectedTo, Quantum Coherence Management>
diff --git a/test/mermaid/hard/mermaid_166.mmd b/test/mermaid/hard/mermaid_166.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..a1632f64b9debcac6a02b7293c3bc6c02b2b2004
--- /dev/null
+++ b/test/mermaid/hard/mermaid_166.mmd
@@ -0,0 +1,98 @@
+graph BT
+    N0([start])
+    N1([Haptic Feedback Integration])
+    N2[[Gesture Recognition]]
+    N3[Retail Experience Enhancement]
+    N4[/Virtual Showrooms/]
+    N5[Performance Optimization]
+    N6(Neuro_VR Interfaces)
+    N7(Software Development Kit Integration)
+    N8{Headset Development}
+    N9[/Augmented Reality App Development/]
+    N10(Virtual Tourism Experiences)
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    subgraph Eye Tracking
+        nest0_0(Live Event Streaming in VR)
+        nest0_1[3D Model Creation]
+        nest0_2([Architectural Visualization])
+        nest0_3[User Interface Design]
+    end
+    subgraph Environment Mapping
+        nest1_0[/AR for Navigation/]
+        nest1_1[Content Creation for AR or VR]
+        nest1_2(Industrial Maintenance Support)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> |yes| N9
+    N9 --> N10
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N4 --> nest0_0
+    nest0_3 --> N2
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N7 -.-> nest1_0
+    nest1_2 -.-> N5
+    N0 --> S0
+    S0 -.-> N9
+    S0 --> N8
+    N1 -.-> S1
+    S1 -.-> N4
+    S1 --> N5
+    S1 -.-> N8
+    N5 --> S2
+    S2 --> N10
+    S2 -.-> N8
+    N6 -.-> M0
+    N4 -.-> M0
+    N2 -.-> |no| M0
+    M0 --> N8
+    style S0 fill:#D0E0F8,stroke:#4285F4
+    style S1 fill:#ECCFF5,stroke:#CD8FF2
+    style S2 fill:#D0E0F8,stroke:#4285F4
+    style M0 fill:#E3F2FD,stroke:#64B5F6
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#64B5F6,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_167.txt b/test/mermaid/hard/mermaid_167.txt
new file mode 100644
index 0000000000000000000000000000000000000000..4387cc357716566960209b80c5ce7fe355a9907f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_167.txt
@@ -0,0 +1,35 @@
+<3D Model Creation, connectedTo, Multiplayer Experience Design>
+<Architectural Visualization, connectedTo, 3D Model Creation>
+<Architectural Visualization, partOf, Field of View Optimization>
+<Cloud_based AR or VR Rendering, connectedTo, Comfort and Ergonomics Design>
+<Comfort and Ergonomics Design, connectedTo, Virtual Showrooms>
+<Comfort and Ergonomics Design, connectedTo, end>
+<Educational Content Development, connectedTo, Immersive Storytelling>
+<Educational Content Development, partOf, Field of View Optimization>
+<Ethical Considerations in AR or VR, connectedTo, Performance Optimization>
+<Gesture Recognition, connectedTo, 3D Model Creation>
+<Gesture Recognition, connectedTo, Virtual Tourism Experiences>
+<Gesture Recognition, yes, Educational Content Development>
+<Haptic Feedback Integration, partOf, Remote Collaboration Tools>
+<Haptic Feedback Integration, yes, Virtual Showrooms>
+<Hardware Prototyping, connectedTo, Gesture Recognition>
+<Immersive Storytelling, connectedTo, Architectural Visualization>
+<Immersive Storytelling, partOf, Field of View Optimization>
+<Mixed Reality Solutions, connectedTo, Cloud_based AR or VR Rendering>
+<Mixed Reality Solutions, connectedTo, Comfort and Ergonomics Design>
+<Mixed Reality Solutions, connectedTo, Performance Optimization>
+<Mixed Reality Solutions, connectedTo, Spatial Audio Implementation>
+<Mixed Reality Solutions, connectedTo, Virtual Showrooms>
+<Mixed Reality Solutions, connectedTo, end>
+<Multiplayer Experience Design, connectedTo, Spatial Audio Implementation>
+<Performance Optimization, connectedTo, Hardware Prototyping>
+<Spatial Audio Implementation, connectedTo, end>
+<User Experience Testing, connectedTo, Mixed Reality Solutions>
+<Virtual Showrooms, connectedTo, Ethical Considerations in AR or VR>
+<Virtual Tourism Experiences, connectedTo, Haptic Feedback Integration>
+<Virtual Tourism Experiences, partOf, Remote Collaboration Tools>
+<start, connectedTo, 3D Model Creation>
+<start, connectedTo, Ethical Considerations in AR or VR>
+<start, connectedTo, Hardware Prototyping>
+<start, connectedTo, Performance Optimization>
+<start, connectedTo, User Experience Testing>
diff --git a/test/mermaid/hard/mermaid_168.mmd b/test/mermaid/hard/mermaid_168.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..b6b1c71b0ea51d785e32c48bc10468932310d5f1
--- /dev/null
+++ b/test/mermaid/hard/mermaid_168.mmd
@@ -0,0 +1,122 @@
+graph BT
+    N0([start])
+    N1[[Neuro_VR Interfaces]]
+    N2[/Content Creation for AR or VR/]
+    N3[/Mixed Reality Solutions/]
+    N4{Latency Reduction}
+    N5(User Interface Design)
+    N6[Medical Applications]
+    N7[[Field of View Optimization]]
+    N8[[Immersive Storytelling]]
+    N9[[Industrial Maintenance Support]]
+    N10[(Live Event Streaming in VR)]
+    N11[[AR for Navigation]]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Training Simulations
+        nest0_0(Eye Tracking)
+        nest0_1[[Cloud_based AR or VR Rendering]]
+        nest0_2[[Educational Content Development]]
+    end
+    subgraph Multiplayer Experience Design
+        nest1_0(Augmented Reality App Development)
+        nest1_1[/User Experience Testing/]
+        nest1_2(Data Visualization in AR or VR)
+        nest1_3[Hand Tracking and Interaction]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> |generates| N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    nest0_0 --> nest0_1
+    nest0_1 -.-> |processes| nest0_2
+    N1 -.-> nest0_0
+    nest0_2 -.-> |deploys| N9
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N3 --> nest1_0
+    nest1_3 --> N3
+    N4 --> S0
+    S0 --> N7
+    S0 -.-> N8
+    N0 --> S1
+    S1 -.-> N3
+    S1 -.-> N4
+    S1 -.-> N6
+    N1 -.-> |simulates| M0
+    N2 -.-> |calibrates| M0
+    N5 -.-> M0
+    M0 --> N10
+    N4 -.-> |designs| M2
+    N0 -.-> M2
+    N3 -.-> M2
+    M2 -.-> N6
+    style N0 fill:#FFF8E1,stroke:#FFD54F
+    style N1 fill:#F8BBD0,stroke:#E91E63
+    style N2 fill:#FFF8E1,stroke:#FFD54F
+    style N3 fill:#FFF8E1,stroke:#FFD54F
+    style N4 fill:#D6D9F0,stroke:#9FA9E1
+    style N5 fill:#FFF8E1,stroke:#FFD54F
+    style N6 fill:#F8BBD0,stroke:#E91E63
+    style N7 fill:#F8BBD0,stroke:#E91E63
+    style N8 fill:#FFF8E1,stroke:#FFD54F
+    style N9 fill:#D6D9F0,stroke:#9FA9E1
+    style N10 fill:#FFF8E1,stroke:#FFD54F
+    style N11 fill:#FFF8E1,stroke:#FFD54F
+    style S0 fill:#FFF8E1,stroke:#FFD54F
+    style S1 fill:#D6D9F0,stroke:#9FA9E1
+    style M0 fill:#F8BBD0,stroke:#E91E63
+    style M2 fill:#F8BBD0,stroke:#E91E63
+    style nest0_0 fill:#D6D9F0,stroke:#9FA9E1
+    style nest0_1 fill:#FFF8E1,stroke:#FFD54F
+    style nest0_2 fill:#FFF8E1,stroke:#FFD54F
+    style nest1_0 fill:#F8BBD0,stroke:#E91E63
+    style nest1_1 fill:#FFF8E1,stroke:#FFD54F
+    style nest1_2 fill:#D6D9F0,stroke:#9FA9E1
+    style nest1_3 fill:#D6D9F0,stroke:#9FA9E1
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFD54F,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_168.txt b/test/mermaid/hard/mermaid_168.txt
new file mode 100644
index 0000000000000000000000000000000000000000..38a78f5ec1cc63db4eb40483fc39ffa3d0c7b7fa
--- /dev/null
+++ b/test/mermaid/hard/mermaid_168.txt
@@ -0,0 +1,37 @@
+<Augmented Reality App Development, connectedTo, User Experience Testing>
+<Augmented Reality App Development, partOf, Multiplayer Experience Design>
+<Cloud_based AR or VR Rendering, partOf, Training Simulations>
+<Cloud_based AR or VR Rendering, processes, Educational Content Development>
+<Content Creation for AR or VR, calibrates, Live Event Streaming in VR>
+<Content Creation for AR or VR, connectedTo, Mixed Reality Solutions>
+<Data Visualization in AR or VR, connectedTo, Hand Tracking and Interaction>
+<Data Visualization in AR or VR, partOf, Multiplayer Experience Design>
+<Educational Content Development, deploys, Industrial Maintenance Support>
+<Educational Content Development, partOf, Training Simulations>
+<Eye Tracking, connectedTo, Cloud_based AR or VR Rendering>
+<Eye Tracking, partOf, Training Simulations>
+<Field of View Optimization, connectedTo, Immersive Storytelling>
+<Hand Tracking and Interaction, connectedTo, Mixed Reality Solutions>
+<Hand Tracking and Interaction, partOf, Multiplayer Experience Design>
+<Immersive Storytelling, connectedTo, Industrial Maintenance Support>
+<Industrial Maintenance Support, connectedTo, Live Event Streaming in VR>
+<Latency Reduction, connectedTo, Field of View Optimization>
+<Latency Reduction, connectedTo, Immersive Storytelling>
+<Latency Reduction, connectedTo, User Interface Design>
+<Latency Reduction, designs, Medical Applications>
+<Live Event Streaming in VR, connectedTo, AR for Navigation>
+<Medical Applications, connectedTo, Field of View Optimization>
+<Mixed Reality Solutions, connectedTo, Augmented Reality App Development>
+<Mixed Reality Solutions, connectedTo, Latency Reduction>
+<Mixed Reality Solutions, connectedTo, Medical Applications>
+<Neuro_VR Interfaces, connectedTo, Content Creation for AR or VR>
+<Neuro_VR Interfaces, connectedTo, Eye Tracking>
+<Neuro_VR Interfaces, simulates, Live Event Streaming in VR>
+<User Experience Testing, connectedTo, Data Visualization in AR or VR>
+<User Experience Testing, partOf, Multiplayer Experience Design>
+<User Interface Design, connectedTo, Live Event Streaming in VR>
+<User Interface Design, generates, Medical Applications>
+<start, connectedTo, Latency Reduction>
+<start, connectedTo, Medical Applications>
+<start, connectedTo, Mixed Reality Solutions>
+<start, connectedTo, Neuro_VR Interfaces>
diff --git a/test/mermaid/hard/mermaid_169.mmd b/test/mermaid/hard/mermaid_169.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..3af0484b8865204b12175d37b21cbdeb55f46c08
--- /dev/null
+++ b/test/mermaid/hard/mermaid_169.mmd
@@ -0,0 +1,140 @@
+graph BT
+    N0([Game Performance Optimization])
+    N1(Game Engine Customization)
+    N2(Live Operations)
+    N3[Marketing and Promotion]
+    N4([Game Publishing])
+    N5[Player Progression Systems]
+    N6[[Art Direction]]
+    N7[/Asset Creation/]
+    N8[Game Balancing]
+    N9(Motion Capture)
+    N10([Localization])
+    N11[[Game Design]]
+    N12[Augmented Reality Gaming]
+    N13[(Multiplayer Game Development)]
+    N14([User Experience Design])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Console Game Development
+        nest0_0[(Esports Event Organization)]
+        nest0_1[(Game Analytics)]
+        nest0_2[/Player Feedback Integration/]
+    end
+    subgraph Anti_Cheat Development
+        nest1_0[(Community Management)]
+        nest1_1(Sound Design)
+        nest1_2[In_Game Economy Design]
+    end
+    N0 --> N1
+    N1 -.-> |interacts| N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> |engineers| N10
+    N10 --> |monetizes| N11
+    N11 --> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N8 -.-> nest0_0
+    nest0_2 -.-> N8
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N8 --> nest1_0
+    nest1_2 --> N12
+    N5 --> S0
+    S0 --> N13
+    S0 --> N10
+    N3 --> S1
+    S1 -.-> N11
+    S1 --> N13
+    S1 -.-> N14
+    N8 --> S2
+    S2 -.-> N11
+    S2 --> N14
+    S2 --> N13
+    S2 -.-> N12
+    N4 -.-> M0
+    N1 --> M0
+    N3 -.-> M0
+    M0 -.-> N6
+    N9 --> M1
+    N4 -.-> M1
+    M1 --> N11
+    style N0 fill:#D0EFEE,stroke:#73C6BC
+    style N1 fill:#D0EFEE,stroke:#73C6BC
+    style N2 fill:#E0F2F1,stroke:#4DB6AC
+    style N3 fill:#C9EFEC,stroke:#6FE1D5
+    style N4 fill:#D0EFEE,stroke:#73C6BC
+    style N5 fill:#E0F2F1,stroke:#4DB6AC
+    style N6 fill:#E0F2F1,stroke:#4DB6AC
+    style N7 fill:#D0EFEE,stroke:#73C6BC
+    style N8 fill:#E0F2F1,stroke:#4DB6AC
+    style N9 fill:#E0F2F1,stroke:#4DB6AC
+    style N10 fill:#E0F2F1,stroke:#4DB6AC
+    style N11 fill:#E0F2F1,stroke:#4DB6AC
+    style N12 fill:#E0F2F1,stroke:#4DB6AC
+    style N13 fill:#E0F2F1,stroke:#4DB6AC
+    style N14 fill:#D0EFEE,stroke:#73C6BC
+    style S0 fill:#C9EFEC,stroke:#6FE1D5
+    style S1 fill:#C9EFEC,stroke:#6FE1D5
+    style S2 fill:#E0F2F1,stroke:#4DB6AC
+    style M0 fill:#C9EFEC,stroke:#6FE1D5
+    style M1 fill:#E0F2F1,stroke:#4DB6AC
+    style nest0_0 fill:#D0EFEE,stroke:#73C6BC
+    style nest0_1 fill:#D0EFEE,stroke:#73C6BC
+    style nest0_2 fill:#D0EFEE,stroke:#73C6BC
+    style nest1_0 fill:#D0EFEE,stroke:#73C6BC
+    style nest1_1 fill:#E0F2F1,stroke:#4DB6AC
+    style nest1_2 fill:#D0EFEE,stroke:#73C6BC
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#4DB6AC,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_169.txt b/test/mermaid/hard/mermaid_169.txt
new file mode 100644
index 0000000000000000000000000000000000000000..28b8e28186bcfe772e3e50f6d82513fdfd25e81a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_169.txt
@@ -0,0 +1,42 @@
+<Art Direction, connectedTo, Asset Creation>
+<Asset Creation, connectedTo, Game Balancing>
+<Augmented Reality Gaming, connectedTo, Multiplayer Game Development>
+<Community Management, connectedTo, Sound Design>
+<Community Management, partOf, Anti_Cheat Development>
+<Esports Event Organization, connectedTo, Game Analytics>
+<Esports Event Organization, partOf, Console Game Development>
+<Game Analytics, connectedTo, Player Feedback Integration>
+<Game Analytics, partOf, Console Game Development>
+<Game Balancing, connectedTo, Augmented Reality Gaming>
+<Game Balancing, connectedTo, Community Management>
+<Game Balancing, connectedTo, Esports Event Organization>
+<Game Balancing, connectedTo, Game Design>
+<Game Balancing, connectedTo, Motion Capture>
+<Game Balancing, connectedTo, Multiplayer Game Development>
+<Game Balancing, connectedTo, User Experience Design>
+<Game Design, connectedTo, Augmented Reality Gaming>
+<Game Engine Customization, connectedTo, Art Direction>
+<Game Engine Customization, interacts, Live Operations>
+<Game Performance Optimization, connectedTo, Game Engine Customization>
+<Game Publishing, connectedTo, Art Direction>
+<Game Publishing, connectedTo, Game Design>
+<Game Publishing, connectedTo, Player Progression Systems>
+<In_Game Economy Design, connectedTo, Augmented Reality Gaming>
+<In_Game Economy Design, partOf, Anti_Cheat Development>
+<Live Operations, connectedTo, Marketing and Promotion>
+<Localization, monetizes, Game Design>
+<Marketing and Promotion, connectedTo, Art Direction>
+<Marketing and Promotion, connectedTo, Game Design>
+<Marketing and Promotion, connectedTo, Game Publishing>
+<Marketing and Promotion, connectedTo, Multiplayer Game Development>
+<Marketing and Promotion, connectedTo, User Experience Design>
+<Motion Capture, connectedTo, Game Design>
+<Motion Capture, engineers, Localization>
+<Multiplayer Game Development, connectedTo, User Experience Design>
+<Player Feedback Integration, connectedTo, Game Balancing>
+<Player Feedback Integration, partOf, Console Game Development>
+<Player Progression Systems, connectedTo, Art Direction>
+<Player Progression Systems, connectedTo, Localization>
+<Player Progression Systems, connectedTo, Multiplayer Game Development>
+<Sound Design, connectedTo, In_Game Economy Design>
+<Sound Design, partOf, Anti_Cheat Development>
diff --git a/test/mermaid/hard/mermaid_17.mmd b/test/mermaid/hard/mermaid_17.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..a0f87c17b2391c9a30454ccdf55bc433cce41dab
--- /dev/null
+++ b/test/mermaid/hard/mermaid_17.mmd
@@ -0,0 +1,136 @@
+graph BT
+    N0([start])
+    N1(Tunnel Monitoring)
+    N2[(Route Optimization)]
+    N3(Road Network Management)
+    N4(Accident Reconstruction)
+    N5{Luggage Handling}
+    N6{Delay Alert}
+    N7[[Electric Vehicle Charging]]
+    N8(Arrival)
+    N9[Bridge Inspection]
+    N10([Load Balancing])
+    N11{Ride_sharing Request}
+    N12(Fare Calculation)
+    N13[(Customs Clearance)]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Maintenance Check
+        nest0_0[(Parking Management)]
+        nest0_1(Public Transport Ticketing)
+        nest0_2{Incident Report}
+        nest0_3(Intermodal Transfer)
+    end
+    subgraph Air Traffic Control
+        nest1_0[(Train Dispatch)]
+        nest1_1(Cargo Loading)
+        nest1_2{Ticket Purchase}
+        nest1_3(Vehicle Tracking)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> |boards| N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> |departs| N11
+    N11 --> N12
+    N12 -.-> N13
+    nest0_0 --> nest0_1
+    nest0_1 -.-> |clears| nest0_2
+    nest0_2 --> |permits| nest0_3
+    N6 -.-> nest0_0
+    nest0_3 -.-> N11
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N1 --> nest1_0
+    nest1_3 --> N3
+    N1 -.-> S0
+    S0 --> N5
+    S0 --> |routes| N13
+    S0 --> N6
+    N3 -.-> S1
+    S1 --> N9
+    S1 -.-> N11
+    S1 --> N13
+    N4 --> M0
+    N0 -.-> M0
+    N7 -.-> M0
+    N3 -.-> M0
+    M0 -.-> N9
+    N6 -.-> M1
+    N3 --> |alerts| M1
+    M1 -.-> N10
+    style N0 fill:#E8EAF6,stroke:#5C6BC0
+    style N1 fill:#E8EAF6,stroke:#5C6BC0
+    style N2 fill:#FFFDE7,stroke:#FBC02D
+    style N3 fill:#FFFCE6,stroke:#FFF9AE
+    style N4 fill:#FFFCE6,stroke:#FFF9AE
+    style N5 fill:#E8EAF6,stroke:#5C6BC0
+    style N6 fill:#FFFCE6,stroke:#FFF9AE
+    style N7 fill:#FFFDE7,stroke:#FBC02D
+    style N8 fill:#FFFDE7,stroke:#FBC02D
+    style N9 fill:#FFFDE7,stroke:#FBC02D
+    style N10 fill:#FFFCE6,stroke:#FFF9AE
+    style N11 fill:#E8EAF6,stroke:#5C6BC0
+    style N12 fill:#E8EAF6,stroke:#5C6BC0
+    style N13 fill:#FFFDE7,stroke:#FBC02D
+    style S0 fill:#FFFCE6,stroke:#FFF9AE
+    style S1 fill:#FFFDE7,stroke:#FBC02D
+    style M0 fill:#E8EAF6,stroke:#5C6BC0
+    style M1 fill:#FFFDE7,stroke:#FBC02D
+    style nest0_0 fill:#E8EAF6,stroke:#5C6BC0
+    style nest0_1 fill:#FFFDE7,stroke:#FBC02D
+    style nest0_2 fill:#FFFCE6,stroke:#FFF9AE
+    style nest0_3 fill:#FFFDE7,stroke:#FBC02D
+    style nest1_0 fill:#FFFDE7,stroke:#FBC02D
+    style nest1_1 fill:#E8EAF6,stroke:#5C6BC0
+    style nest1_2 fill:#FFFDE7,stroke:#FBC02D
+    style nest1_3 fill:#E8EAF6,stroke:#5C6BC0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_17.txt b/test/mermaid/hard/mermaid_17.txt
new file mode 100644
index 0000000000000000000000000000000000000000..005579c4e5dbb3855d9c31ed793227f4716d9ba5
--- /dev/null
+++ b/test/mermaid/hard/mermaid_17.txt
@@ -0,0 +1,42 @@
+<Accident Reconstruction, connectedTo, Bridge Inspection>
+<Accident Reconstruction, connectedTo, Luggage Handling>
+<Arrival, connectedTo, Bridge Inspection>
+<Bridge Inspection, connectedTo, Load Balancing>
+<Cargo Loading, connectedTo, Ticket Purchase>
+<Cargo Loading, partOf, Air Traffic Control>
+<Delay Alert, connectedTo, Electric Vehicle Charging>
+<Delay Alert, connectedTo, Load Balancing>
+<Delay Alert, connectedTo, Parking Management>
+<Electric Vehicle Charging, boards, Arrival>
+<Electric Vehicle Charging, connectedTo, Bridge Inspection>
+<Fare Calculation, connectedTo, Customs Clearance>
+<Incident Report, partOf, Maintenance Check>
+<Incident Report, permits, Intermodal Transfer>
+<Intermodal Transfer, connectedTo, Ride_sharing Request>
+<Intermodal Transfer, partOf, Maintenance Check>
+<Load Balancing, departs, Ride_sharing Request>
+<Luggage Handling, connectedTo, Delay Alert>
+<Parking Management, connectedTo, Public Transport Ticketing>
+<Parking Management, partOf, Maintenance Check>
+<Public Transport Ticketing, clears, Incident Report>
+<Public Transport Ticketing, partOf, Maintenance Check>
+<Ride_sharing Request, connectedTo, Fare Calculation>
+<Road Network Management, alerts, Load Balancing>
+<Road Network Management, connectedTo, Accident Reconstruction>
+<Road Network Management, connectedTo, Bridge Inspection>
+<Road Network Management, connectedTo, Customs Clearance>
+<Road Network Management, connectedTo, Ride_sharing Request>
+<Route Optimization, connectedTo, Road Network Management>
+<Ticket Purchase, connectedTo, Vehicle Tracking>
+<Ticket Purchase, partOf, Air Traffic Control>
+<Train Dispatch, connectedTo, Cargo Loading>
+<Train Dispatch, partOf, Air Traffic Control>
+<Tunnel Monitoring, connectedTo, Delay Alert>
+<Tunnel Monitoring, connectedTo, Luggage Handling>
+<Tunnel Monitoring, connectedTo, Route Optimization>
+<Tunnel Monitoring, connectedTo, Train Dispatch>
+<Tunnel Monitoring, routes, Customs Clearance>
+<Vehicle Tracking, connectedTo, Road Network Management>
+<Vehicle Tracking, partOf, Air Traffic Control>
+<start, connectedTo, Bridge Inspection>
+<start, connectedTo, Tunnel Monitoring>
diff --git a/test/mermaid/hard/mermaid_170.txt b/test/mermaid/hard/mermaid_170.txt
new file mode 100644
index 0000000000000000000000000000000000000000..4f26998d963392b23b3b72cb04b7587a95a409ea
--- /dev/null
+++ b/test/mermaid/hard/mermaid_170.txt
@@ -0,0 +1,37 @@
+<Anti_Cheat Development, connectedTo, Esports Event Organization>
+<Anti_Cheat Development, partOf, Mobile Game Development>
+<Bug Fixing, connectedTo, Console Game Development>
+<Bug Fixing, connectedTo, Virtual Reality Gaming>
+<Character Design, connectedTo, Game Engine Customization>
+<Character Design, connectedTo, In_Game Economy Design>
+<Community Management, connectedTo, Game Analytics>
+<Community Management, connectedTo, Game Engine Customization>
+<Community Management, programs, Voice Acting>
+<Console Game Development, connectedTo, Sound Design>
+<Console Game Development, partOf, AI Behavior Programming>
+<Esports Event Organization, connectedTo, Player Progression Systems>
+<Esports Event Organization, partOf, Mobile Game Development>
+<Game Analytics, connectedTo, Bug Fixing>
+<In_Game Economy Design, connectedTo, Anti_Cheat Development>
+<In_Game Economy Design, connectedTo, Game Analytics>
+<In_Game Economy Design, connectedTo, Quality Assurance Testing>
+<Localization, connectedTo, Game Analytics>
+<Localization, connectedTo, Game Engine Customization>
+<Localization, connectedTo, Monetization Strategy>
+<Localization, connectedTo, Motion Capture>
+<Localization, connectedTo, Virtual Reality Gaming>
+<Monetization Strategy, connectedTo, Voice Acting>
+<Motion Capture, balances, Game Engine Customization>
+<Motion Capture, connectedTo, Community Management>
+<Motion Capture, connectedTo, Game Analytics>
+<Player Progression Systems, connectedTo, User Interface Design>
+<Player Progression Systems, partOf, Mobile Game Development>
+<Quality Assurance Testing, connectedTo, Game Engine Customization>
+<Quality Assurance Testing, connectedTo, Localization>
+<Sound Design, connectedTo, Game Engine Customization>
+<Sound Design, partOf, AI Behavior Programming>
+<User Interface Design, connectedTo, In_Game Economy Design>
+<User Interface Design, partOf, Mobile Game Development>
+<Virtual Reality Gaming, connectedTo, Game Engine Customization>
+<Virtual Reality Gaming, connectedTo, Monetization Strategy>
+<Voice Acting, connectedTo, Game Engine Customization>
diff --git a/test/mermaid/hard/mermaid_171.mmd b/test/mermaid/hard/mermaid_171.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..ead31030b0c0d08a8b74238279706557c2d4fc1e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_171.mmd
@@ -0,0 +1,132 @@
+graph TD
+    N0([Mobile Game Development])
+    N1[[Asset Creation]]
+    N2(Network Code Optimization)
+    N3[Physics Simulation]
+    N4[/Narrative Design/]
+    N5[[AI Behavior Programming]]
+    N6(User Experience Design)
+    N7[Player Feedback Integration]
+    N8(Augmented Reality Gaming)
+    N9(Sound Design)
+    N10[/Motion Capture/]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Game Analytics
+        nest0_0[/Quality Assurance Testing/]
+        nest0_1[[Engine Development]]
+        nest0_2[(Player Progression Systems)]
+    end
+    subgraph Monetization Strategy
+        nest1_0[/Console Game Development/]
+        nest1_1[In_Game Economy Design]
+        nest1_2[(Virtual Reality Gaming)]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    N1 -.-> |sounds| nest0_0
+    nest0_2 -.-> |animates| N5
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N8 -.-> nest1_0
+    nest1_2 -.-> N8
+    N5 --> S0
+    S0 -.-> N7
+    S0 -.-> N10
+    S0 -.-> N9
+    S0 -.-> N8
+    N5 -.-> S1
+    S1 --> N7
+    S1 -.-> N9
+    S1 --> N8
+    S1 --> N10
+    N1 --> S2
+    S2 --> N10
+    S2 -.-> N8
+    S2 --> N4
+    S2 --> N7
+    N7 -.-> M1
+    N3 --> M1
+    M1 -.-> N10
+    N2 --> M2
+    N3 -.-> M2
+    N0 -.-> M2
+    N1 -.-> |broadcasts| M2
+    M2 -.-> N6
+    style N0 fill:#FFF3E0,stroke:#FFB74D
+    style N1 fill:#EFE6FF,stroke:#C2B2F0
+    style N2 fill:#E0F2F1,stroke:#26A69A
+    style N3 fill:#FFF3E0,stroke:#FFB74D
+    style N4 fill:#EFE6FF,stroke:#C2B2F0
+    style N5 fill:#E0F2F1,stroke:#26A69A
+    style N6 fill:#E0F2F1,stroke:#26A69A
+    style N7 fill:#FFF3E0,stroke:#FFB74D
+    style N8 fill:#EFE6FF,stroke:#C2B2F0
+    style N9 fill:#EFE6FF,stroke:#C2B2F0
+    style N10 fill:#E0F2F1,stroke:#26A69A
+    style S0 fill:#EFE6FF,stroke:#C2B2F0
+    style S1 fill:#EFE6FF,stroke:#C2B2F0
+    style S2 fill:#FFF3E0,stroke:#FFB74D
+    style M1 fill:#FFF3E0,stroke:#FFB74D
+    style M2 fill:#E0F2F1,stroke:#26A69A
+    style nest0_0 fill:#FFF3E0,stroke:#FFB74D
+    style nest0_1 fill:#EFE6FF,stroke:#C2B2F0
+    style nest0_2 fill:#FFF3E0,stroke:#FFB74D
+    style nest1_0 fill:#E0F2F1,stroke:#26A69A
+    style nest1_1 fill:#FFF3E0,stroke:#FFB74D
+    style nest1_2 fill:#FFF3E0,stroke:#FFB74D
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#FFB74D,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_171.txt b/test/mermaid/hard/mermaid_171.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0d23361cc8df3ee114377317a262c8be4661b571
--- /dev/null
+++ b/test/mermaid/hard/mermaid_171.txt
@@ -0,0 +1,38 @@
+<AI Behavior Programming, connectedTo, Augmented Reality Gaming>
+<AI Behavior Programming, connectedTo, Motion Capture>
+<AI Behavior Programming, connectedTo, Player Feedback Integration>
+<AI Behavior Programming, connectedTo, Sound Design>
+<AI Behavior Programming, connectedTo, User Experience Design>
+<Asset Creation, broadcasts, User Experience Design>
+<Asset Creation, connectedTo, Augmented Reality Gaming>
+<Asset Creation, connectedTo, Motion Capture>
+<Asset Creation, connectedTo, Narrative Design>
+<Asset Creation, connectedTo, Network Code Optimization>
+<Asset Creation, connectedTo, Player Feedback Integration>
+<Asset Creation, sounds, Quality Assurance Testing>
+<Augmented Reality Gaming, connectedTo, Console Game Development>
+<Augmented Reality Gaming, connectedTo, Sound Design>
+<Console Game Development, connectedTo, In_Game Economy Design>
+<Console Game Development, partOf, Monetization Strategy>
+<Engine Development, connectedTo, Player Progression Systems>
+<Engine Development, partOf, Game Analytics>
+<In_Game Economy Design, connectedTo, Virtual Reality Gaming>
+<In_Game Economy Design, partOf, Monetization Strategy>
+<Mobile Game Development, connectedTo, Asset Creation>
+<Mobile Game Development, connectedTo, User Experience Design>
+<Narrative Design, connectedTo, AI Behavior Programming>
+<Network Code Optimization, connectedTo, Physics Simulation>
+<Network Code Optimization, connectedTo, User Experience Design>
+<Physics Simulation, connectedTo, Motion Capture>
+<Physics Simulation, connectedTo, Narrative Design>
+<Physics Simulation, connectedTo, User Experience Design>
+<Player Feedback Integration, connectedTo, Augmented Reality Gaming>
+<Player Feedback Integration, connectedTo, Motion Capture>
+<Player Progression Systems, animates, AI Behavior Programming>
+<Player Progression Systems, partOf, Game Analytics>
+<Quality Assurance Testing, connectedTo, Engine Development>
+<Quality Assurance Testing, partOf, Game Analytics>
+<Sound Design, connectedTo, Motion Capture>
+<User Experience Design, connectedTo, Player Feedback Integration>
+<Virtual Reality Gaming, connectedTo, Augmented Reality Gaming>
+<Virtual Reality Gaming, partOf, Monetization Strategy>
diff --git a/test/mermaid/hard/mermaid_172.txt b/test/mermaid/hard/mermaid_172.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ecc97fdc0f1e515b80ffa7c429ac6cf5054a9150
--- /dev/null
+++ b/test/mermaid/hard/mermaid_172.txt
@@ -0,0 +1,38 @@
+<Arrangement, critiques, Sound System Design>
+<Arrangement, partOf, Instrumental Performance>
+<Artist Management, connectedTo, Music Therapy>
+<Artist Management, partOf, Sampling>
+<Concert Promotion, connectedTo, Music Publishing>
+<Copyright Management, connectedTo, Mixing>
+<Copyright Management, connectedTo, Music Licensing>
+<Copyright Management, connectedTo, Music Publishing>
+<Copyright Management, performs, Concert Promotion>
+<Copyright Management, records, Recording>
+<Crowdfunding for Music Projects, educates, Royalty Collection>
+<Crowdfunding for Music Projects, partOf, Sampling>
+<Digital Audio Workstation Operation, connectedTo, Crowdfunding for Music Projects>
+<Digital Audio Workstation Operation, partOf, Sampling>
+<Lyric Writing, manages, Copyright Management>
+<Mixing, connectedTo, Concert Promotion>
+<Music Publishing, connectedTo, Digital Audio Workstation Operation>
+<Music Publishing, connectedTo, Music Licensing>
+<Music Therapy, connectedTo, Lyric Writing>
+<Record Label Operations, connectedTo, Copyright Management>
+<Record Label Operations, connectedTo, Lyric Writing>
+<Record Label Operations, connectedTo, Mixing>
+<Record Label Operations, connectedTo, Music Licensing>
+<Record Label Operations, connectedTo, Music Publishing>
+<Record Label Operations, connectedTo, Music Therapy>
+<Record Label Operations, connectedTo, Streaming Platform Management>
+<Record Label Operations, reviews, Music Therapy>
+<Recording, connectedTo, Arrangement>
+<Recording, partOf, Instrumental Performance>
+<Royalty Collection, connectedTo, Artist Management>
+<Royalty Collection, partOf, Sampling>
+<Sound System Design, connectedTo, Music Licensing>
+<Sound System Design, partOf, Instrumental Performance>
+<Streaming Platform Management, connectedTo, Lyric Writing>
+<Streaming Platform Management, connectedTo, Music Therapy>
+<start, connectedTo, Lyric Writing>
+<start, connectedTo, Music Therapy>
+<start, connectedTo, Record Label Operations>
diff --git a/test/mermaid/hard/mermaid_173.mmd b/test/mermaid/hard/mermaid_173.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..4528667d8773fd33317c15b788377567fa59b6c1
--- /dev/null
+++ b/test/mermaid/hard/mermaid_173.mmd
@@ -0,0 +1,126 @@
+graph LR
+    N0([start])
+    N1[[Music Production]]
+    N2[Beat Making]
+    N3[/Recording/]
+    N4(Synthesizer Programming)
+    N5(Record Label Operations)
+    N6[Performance]
+    N7(Instrumental Performance)
+    N8[[Music Festival Organization]]
+    N9[/Audio Engineering/]
+    N10([Music Theory Analysis])
+    N11[[Merchandise Sales]]
+    N12(Mixing)
+    N13(Tour Management)
+    N14([Vocal Performance])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Music Distribution
+        nest0_0{Music Therapy}
+        nest0_1(Sampling)
+    end
+    subgraph Music for Film or TV or Games
+        nest1_0[Crowdfunding for Music Projects]
+        nest1_1(Digital Audio Workstation Operation)
+    end
+    N0 -.-> N1
+    N1 --> |writes| N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> |funds| N9
+    N9 --> N10
+    N10 --> N11
+    N11 --> |composes| N12
+    N12 --> N13
+    N13 --> |trains| N14
+    nest0_0 --> nest0_1
+    N1 -.-> nest0_0
+    nest0_1 --> N10
+    nest1_0 -.-> nest1_1
+    N9 -.-> nest1_0
+    nest1_1 --> N14
+    N2 --> S0
+    S0 -.-> N11
+    S0 -.-> N4
+    N4 --> S1
+    S1 -.-> N12
+    S1 --> N7
+    N3 --> S2
+    S2 --> N5
+    S2 -.-> |produces| N9
+    N4 --> M0
+    N0 -.-> M0
+    N6 -.-> |licenses| M0
+    M0 --> N9
+    N8 --> M1
+    N1 -.-> M1
+    M1 -.-> N11
+    style N0 fill:#F9FBE7,stroke:#DCE775
+    style N1 fill:#B2EBF2,stroke:#00BCD4
+    style N2 fill:#F9FBE7,stroke:#DCE775
+    style N3 fill:#F9FBE7,stroke:#DCE775
+    style N4 fill:#B2EBF2,stroke:#00BCD4
+    style N5 fill:#F9FBE7,stroke:#DCE775
+    style N6 fill:#F9FBE7,stroke:#DCE775
+    style N7 fill:#F9FBE7,stroke:#DCE775
+    style N8 fill:#FCE4EC,stroke:#E91E63
+    style N9 fill:#FCE4EC,stroke:#E91E63
+    style N10 fill:#FCE4EC,stroke:#E91E63
+    style N11 fill:#FCE4EC,stroke:#E91E63
+    style N12 fill:#B2EBF2,stroke:#00BCD4
+    style N13 fill:#B2EBF2,stroke:#00BCD4
+    style N14 fill:#F9FBE7,stroke:#DCE775
+    style S0 fill:#B2EBF2,stroke:#00BCD4
+    style S1 fill:#B2EBF2,stroke:#00BCD4
+    style S2 fill:#F9FBE7,stroke:#DCE775
+    style M0 fill:#B2EBF2,stroke:#00BCD4
+    style M1 fill:#FCE4EC,stroke:#E91E63
+    style nest0_0 fill:#F9FBE7,stroke:#DCE775
+    style nest0_1 fill:#FCE4EC,stroke:#E91E63
+    style nest1_0 fill:#FCE4EC,stroke:#E91E63
+    style nest1_1 fill:#FCE4EC,stroke:#E91E63
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_174.txt b/test/mermaid/hard/mermaid_174.txt
new file mode 100644
index 0000000000000000000000000000000000000000..a3ba39f916a3d298c79f9e31a49e5f827507101c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_174.txt
@@ -0,0 +1,43 @@
+<A&R, connectedTo, Music Therapy>
+<Arrangement, partOf, Sound Design for Media>
+<Arrangement, streams, Ticketing>
+<Artist Management, connectedTo, Music Festival Organization>
+<Artist Management, partOf, Beat Making>
+<Audio Engineering, analyzes, Music Publishing>
+<Audio Engineering, connectedTo, Artist Management>
+<Audio Engineering, connectedTo, Composition>
+<Audio Engineering, connectedTo, Concert Promotion>
+<Concert Promotion, syncs, Music Publishing>
+<Digital Audio Workstation Operation, connectedTo, Performance>
+<Instrumental Performance, connectedTo, Performance>
+<Instrumental Performance, connectedTo, Royalty Collection>
+<Instrumental Performance, distributes, Music Licensing>
+<Live Sound Engineering, connectedTo, Lyric Writing>
+<Live Sound Engineering, partOf, Sound Design for Media>
+<Lyric Writing, connectedTo, Arrangement>
+<Lyric Writing, partOf, Sound Design for Media>
+<Merchandise Sales, connectedTo, Music Distribution>
+<Music Distribution, connectedTo, Music Video Production>
+<Music Distribution, connectedTo, Tour Management>
+<Music Festival Organization, connectedTo, Sound System Design>
+<Music Festival Organization, partOf, Beat Making>
+<Music Licensing, connectedTo, Merchandise Sales>
+<Music Licensing, connectedTo, Music Theory Analysis>
+<Music Production, connectedTo, Music Licensing>
+<Music Production, connectedTo, Music Theory Analysis>
+<Music Production, therapies, Tour Management>
+<Music Publishing, connectedTo, Composition>
+<Music Theory Analysis, connectedTo, Ticketing>
+<Music Therapy, connectedTo, Audio Engineering>
+<Music Video Production, connectedTo, Music Theory Analysis>
+<Music Video Production, connectedTo, Synthesizer Programming>
+<Performance, connectedTo, A&R>
+<Royalty Collection, connectedTo, Music Production>
+<Royalty Collection, connectedTo, Tour Management>
+<Royalty Collection, promotes, Music Theory Analysis>
+<Sound System Design, connectedTo, Music Theory Analysis>
+<Sound System Design, partOf, Beat Making>
+<Synthesizer Programming, connectedTo, Live Sound Engineering>
+<Synthesizer Programming, partOf, Sound Design for Media>
+<Ticketing, connectedTo, Tour Management>
+<Tour Management, connectedTo, Digital Audio Workstation Operation>
diff --git a/test/mermaid/hard/mermaid_175.mmd b/test/mermaid/hard/mermaid_175.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..935628989b87999de38fcd86a31cff95a9a13f34
--- /dev/null
+++ b/test/mermaid/hard/mermaid_175.mmd
@@ -0,0 +1,108 @@
+graph RL
+    N0([start])
+    N1([Green Production Practices])
+    N2[(Script Development)]
+    N3[Insurance Management]
+    N4(Post_production Audio)
+    N5[[Distribution Strategy]]
+    N6{Tax Incentive Management}
+    N7([Sound Recording])
+    N8[Cinematography]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Casting
+        nest0_0(Costume Design)
+        nest0_1[(Production Scheduling)]
+        nest0_2{Art Direction}
+    end
+    subgraph Pre_production Planning
+        nest1_0{Visual Effects}
+        nest1_1(Lighting Design)
+        nest1_2[/Set Construction/]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> |schedules| N4
+    N4 -.-> N5
+    N5 --> |captures| N6
+    N6 -.-> N7
+    N7 -.-> N8
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N2 -.-> nest0_0
+    nest0_2 -.-> N7
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N2 -.-> nest1_0
+    nest1_2 --> N4
+    N5 --> S0
+    S0 -.-> N8
+    S0 --> N7
+    N5 -.-> S1
+    S1 -.-> N7
+    S1 -.-> N8
+    N5 -.-> S2
+    S2 -.-> |publishes| N8
+    S2 --> N7
+    N1 -.-> M1
+    N2 -.-> M1
+    M1 --> N5
+    N0 --> M2
+    N1 -.-> M2
+    M2 -.-> N3
+    style N0 fill:#BBDEFB,stroke:#2196F3
+    style N1 fill:#BBDEFB,stroke:#2196F3
+    style N2 fill:#D6D9F0,stroke:#9FA9E1
+    style N3 fill:#D6D9F0,stroke:#9FA9E1
+    style N4 fill:#D6D9F0,stroke:#9FA9E1
+    style N5 fill:#D6D9F0,stroke:#9FA9E1
+    style N6 fill:#D7CCC8,stroke:#795548
+    style N7 fill:#D6D9F0,stroke:#9FA9E1
+    style N8 fill:#D7CCC8,stroke:#795548
+    style S0 fill:#BBDEFB,stroke:#2196F3
+    style S1 fill:#D6D9F0,stroke:#9FA9E1
+    style S2 fill:#D7CCC8,stroke:#795548
+    style M1 fill:#D7CCC8,stroke:#795548
+    style M2 fill:#D6D9F0,stroke:#9FA9E1
+    style nest0_0 fill:#D7CCC8,stroke:#795548
+    style nest0_1 fill:#D7CCC8,stroke:#795548
+    style nest0_2 fill:#BBDEFB,stroke:#2196F3
+    style nest1_0 fill:#BBDEFB,stroke:#2196F3
+    style nest1_1 fill:#BBDEFB,stroke:#2196F3
+    style nest1_2 fill:#D7CCC8,stroke:#795548
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#2196F3,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_175.txt b/test/mermaid/hard/mermaid_175.txt
new file mode 100644
index 0000000000000000000000000000000000000000..df006120ef11e081219a4089153f575522712a59
--- /dev/null
+++ b/test/mermaid/hard/mermaid_175.txt
@@ -0,0 +1,29 @@
+<Art Direction, connectedTo, Sound Recording>
+<Art Direction, partOf, Casting>
+<Costume Design, connectedTo, Production Scheduling>
+<Costume Design, partOf, Casting>
+<Distribution Strategy, captures, Tax Incentive Management>
+<Distribution Strategy, connectedTo, Cinematography>
+<Distribution Strategy, connectedTo, Sound Recording>
+<Distribution Strategy, publishes, Cinematography>
+<Green Production Practices, connectedTo, Distribution Strategy>
+<Green Production Practices, connectedTo, Insurance Management>
+<Green Production Practices, connectedTo, Script Development>
+<Insurance Management, schedules, Post_production Audio>
+<Lighting Design, connectedTo, Set Construction>
+<Lighting Design, partOf, Pre_production Planning>
+<Post_production Audio, connectedTo, Distribution Strategy>
+<Production Scheduling, connectedTo, Art Direction>
+<Production Scheduling, partOf, Casting>
+<Script Development, connectedTo, Costume Design>
+<Script Development, connectedTo, Distribution Strategy>
+<Script Development, connectedTo, Insurance Management>
+<Script Development, connectedTo, Visual Effects>
+<Set Construction, connectedTo, Post_production Audio>
+<Set Construction, partOf, Pre_production Planning>
+<Sound Recording, connectedTo, Cinematography>
+<Tax Incentive Management, connectedTo, Sound Recording>
+<Visual Effects, connectedTo, Lighting Design>
+<Visual Effects, partOf, Pre_production Planning>
+<start, connectedTo, Green Production Practices>
+<start, connectedTo, Insurance Management>
diff --git a/test/mermaid/hard/mermaid_176.txt b/test/mermaid/hard/mermaid_176.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e414a4c7cea18b16616678e931fc9a1763bdfcf3
--- /dev/null
+++ b/test/mermaid/hard/mermaid_176.txt
@@ -0,0 +1,34 @@
+<Archiving and Preservation, connectedTo, Pre_production Planning>
+<Archiving and Preservation, partOf, Directing>
+<Audience Research, connectedTo, Makeup and Hair Design>
+<Audience Research, partOf, Special Effects>
+<Casting, connectedTo, Set Construction>
+<Cinematography, connectedTo, Crew Management>
+<Costume Design, connectedTo, Archiving and Preservation>
+<Costume Design, partOf, Directing>
+<Crew Management, connectedTo, Film Scoring>
+<Crew Management, connectedTo, Stunt Coordination>
+<Insurance Management, connectedTo, Casting>
+<Insurance Management, connectedTo, Legal Compliance>
+<Legal Compliance, connectedTo, Costume Design>
+<Legal Compliance, partOf, Directing>
+<Makeup and Hair Design, connectedTo, Set Construction>
+<Makeup and Hair Design, partOf, Special Effects>
+<Marketing and Publicity, connectedTo, Film Scoring>
+<Marketing and Publicity, connectedTo, Virtual Production Techniques>
+<Pre_production Planning, connectedTo, Virtual Production Techniques>
+<Pre_production Planning, partOf, Directing>
+<Production Accounting, connectedTo, Audience Research>
+<Production Accounting, connectedTo, Crew Management>
+<Production Accounting, connectedTo, Insurance Management>
+<Production Accounting, connectedTo, Remote Collaboration Tools>
+<Production Accounting, connectedTo, Stunt Coordination>
+<Remote Collaboration Tools, no, Film Scoring>
+<Set Construction, connectedTo, Cinematography>
+<Set Construction, connectedTo, Crew Management>
+<Set Construction, connectedTo, Film Scoring>
+<Set Construction, connectedTo, Remote Collaboration Tools>
+<Set Construction, connectedTo, Stunt Coordination>
+<Stunt Coordination, connectedTo, Remote Collaboration Tools>
+<Virtual Production Techniques, connectedTo, Production Accounting>
+<start, connectedTo, Marketing and Publicity>
diff --git a/test/mermaid/hard/mermaid_177.mmd b/test/mermaid/hard/mermaid_177.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..a551a1b0f46e54c560dab22ff4ed252eb4769c91
--- /dev/null
+++ b/test/mermaid/hard/mermaid_177.mmd
@@ -0,0 +1,110 @@
+graph TD
+    N0([Distribution Strategy])
+    N1[Costume Design]
+    N2[Prop Management]
+    N3[(Insurance Management)]
+    N4[Stunt Coordination]
+    N5[Tax Incentive Management]
+    N6[(Crew Management)]
+    N7{Script Development}
+    N8([Color Grading])
+    N9(Set Construction)
+    N10[[Virtual Production Techniques]]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Digital Asset Management
+        nest0_0[(Marketing and Publicity)]
+        nest0_1(Audience Research)
+    end
+    subgraph Remote Collaboration Tools
+        nest1_0(Film Scoring)
+        nest1_1(Archiving and Preservation)
+        nest1_2[[Film Financing]]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> |shoots| N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    nest0_0 --> nest0_1
+    N5 --> nest0_0
+    nest0_1 -.-> N7
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N3 -.-> nest1_0
+    nest1_2 -.-> N3
+    N0 -.-> S0
+    S0 --> N3
+    S0 --> |produces| N8
+    S0 --> N5
+    N4 --> S1
+    S1 -.-> N8
+    S1 -.-> N10
+    N3 -.-> M0
+    N6 -.-> M0
+    N0 --> |budgets| M0
+    M0 --> N8
+    N1 --> M1
+    N0 --> M1
+    N2 --> M1
+    M1 --> N4
+    style N0 fill:#FFCCBC,stroke:#FF5722
+    style N1 fill:#EFE6FF,stroke:#C2B2F0
+    style N2 fill:#F1F8E9,stroke:#388E3C
+    style N3 fill:#F1F8E9,stroke:#388E3C
+    style N4 fill:#EFE6FF,stroke:#C2B2F0
+    style N5 fill:#F1F8E9,stroke:#388E3C
+    style N6 fill:#EFE6FF,stroke:#C2B2F0
+    style N7 fill:#FFCCBC,stroke:#FF5722
+    style N8 fill:#FFCCBC,stroke:#FF5722
+    style N9 fill:#F1F8E9,stroke:#388E3C
+    style N10 fill:#EFE6FF,stroke:#C2B2F0
+    style S0 fill:#FFCCBC,stroke:#FF5722
+    style S1 fill:#EFE6FF,stroke:#C2B2F0
+    style M0 fill:#EFE6FF,stroke:#C2B2F0
+    style M1 fill:#FFCCBC,stroke:#FF5722
+    style nest0_0 fill:#F1F8E9,stroke:#388E3C
+    style nest0_1 fill:#EFE6FF,stroke:#C2B2F0
+    style nest1_0 fill:#F1F8E9,stroke:#388E3C
+    style nest1_1 fill:#F1F8E9,stroke:#388E3C
+    style nest1_2 fill:#F1F8E9,stroke:#388E3C
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#C2B2F0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_177.txt b/test/mermaid/hard/mermaid_177.txt
new file mode 100644
index 0000000000000000000000000000000000000000..f4ab5daf17b2795a7266dabceefc65dc6a131ce3
--- /dev/null
+++ b/test/mermaid/hard/mermaid_177.txt
@@ -0,0 +1,33 @@
+<Archiving and Preservation, connectedTo, Film Financing>
+<Archiving and Preservation, partOf, Remote Collaboration Tools>
+<Audience Research, connectedTo, Script Development>
+<Audience Research, partOf, Digital Asset Management>
+<Color Grading, connectedTo, Set Construction>
+<Costume Design, connectedTo, Prop Management>
+<Costume Design, connectedTo, Stunt Coordination>
+<Crew Management, connectedTo, Color Grading>
+<Crew Management, shoots, Script Development>
+<Distribution Strategy, budgets, Color Grading>
+<Distribution Strategy, connectedTo, Costume Design>
+<Distribution Strategy, connectedTo, Insurance Management>
+<Distribution Strategy, connectedTo, Stunt Coordination>
+<Distribution Strategy, connectedTo, Tax Incentive Management>
+<Distribution Strategy, produces, Color Grading>
+<Film Financing, connectedTo, Insurance Management>
+<Film Financing, partOf, Remote Collaboration Tools>
+<Film Scoring, connectedTo, Archiving and Preservation>
+<Film Scoring, partOf, Remote Collaboration Tools>
+<Insurance Management, connectedTo, Color Grading>
+<Insurance Management, connectedTo, Film Scoring>
+<Insurance Management, connectedTo, Stunt Coordination>
+<Marketing and Publicity, connectedTo, Audience Research>
+<Marketing and Publicity, partOf, Digital Asset Management>
+<Prop Management, connectedTo, Insurance Management>
+<Prop Management, connectedTo, Stunt Coordination>
+<Script Development, connectedTo, Color Grading>
+<Set Construction, connectedTo, Virtual Production Techniques>
+<Stunt Coordination, connectedTo, Color Grading>
+<Stunt Coordination, connectedTo, Tax Incentive Management>
+<Stunt Coordination, connectedTo, Virtual Production Techniques>
+<Tax Incentive Management, connectedTo, Crew Management>
+<Tax Incentive Management, connectedTo, Marketing and Publicity>
diff --git a/test/mermaid/hard/mermaid_178.mmd b/test/mermaid/hard/mermaid_178.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..f106d661fa31475fdd9c7f0ffe5a03d408b29bbb
--- /dev/null
+++ b/test/mermaid/hard/mermaid_178.mmd
@@ -0,0 +1,95 @@
+graph RL
+    N0([start])
+    N1[Fact_Checking]
+    N2(Graphic Design)
+    N3[(Audio Recording)]
+    N4([Podcast Production])
+    N5[Editing and Proofreading]
+    N6[[Audience Engagement]]
+    N7{Search Engine Optimization}
+    N8[E_book Writing]
+    S0(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Content Localization
+        nest0_0{Newsletter Creation}
+        nest0_1[/Live Streaming Content/]
+        nest0_2[[Content Strategy Development]]
+        nest0_3[(Content Repurposing)]
+    end
+    subgraph Content Management System Operation
+        nest1_0[/Drafting Content/]
+        nest1_1[Plagiarism Checking]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> |no| nest0_3
+    N6 --> nest0_0
+    nest0_3 --> N5
+    nest1_0 -.-> nest1_1
+    N4 -.-> nest1_0
+    nest1_1 --> N1
+    N5 -.-> S0
+    S0 -.-> N7
+    S0 --> |yes| N8
+    N2 -.-> S2
+    S2 -.-> N8
+    S2 -.-> N6
+    S2 --> N4
+    S2 -.-> N5
+    N0 --> M0
+    N1 -.-> M0
+    N2 -.-> M0
+    N5 -.-> M0
+    M0 -.-> N7
+    N0 -.-> M1
+    N2 --> M1
+    N1 -.-> M1
+    M1 --> N6
+    style S0 fill:#F1F8FF,stroke:#42A5F5
+    style S2 fill:#CFD8DC,stroke:#607D8B
+    style M0 fill:#CFD8DC,stroke:#607D8B
+    style M1 fill:#CFD8DC,stroke:#607D8B
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#607D8B,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_178.txt b/test/mermaid/hard/mermaid_178.txt
new file mode 100644
index 0000000000000000000000000000000000000000..5b9fdd998e92c26ca250bdcbc3984c8b8da81f57
--- /dev/null
+++ b/test/mermaid/hard/mermaid_178.txt
@@ -0,0 +1,33 @@
+<Audience Engagement, connectedTo, Newsletter Creation>
+<Audience Engagement, connectedTo, Search Engine Optimization>
+<Audio Recording, connectedTo, Podcast Production>
+<Content Repurposing, connectedTo, Editing and Proofreading>
+<Content Repurposing, partOf, Content Localization>
+<Content Strategy Development, no, Content Repurposing>
+<Content Strategy Development, partOf, Content Localization>
+<Drafting Content, connectedTo, Plagiarism Checking>
+<Drafting Content, partOf, Content Management System Operation>
+<Editing and Proofreading, connectedTo, Audience Engagement>
+<Editing and Proofreading, connectedTo, Search Engine Optimization>
+<Editing and Proofreading, yes, E_book Writing>
+<Fact_Checking, connectedTo, Audience Engagement>
+<Fact_Checking, connectedTo, Graphic Design>
+<Fact_Checking, connectedTo, Search Engine Optimization>
+<Graphic Design, connectedTo, Audience Engagement>
+<Graphic Design, connectedTo, Audio Recording>
+<Graphic Design, connectedTo, E_book Writing>
+<Graphic Design, connectedTo, Editing and Proofreading>
+<Graphic Design, connectedTo, Podcast Production>
+<Graphic Design, connectedTo, Search Engine Optimization>
+<Live Streaming Content, connectedTo, Content Strategy Development>
+<Live Streaming Content, partOf, Content Localization>
+<Newsletter Creation, connectedTo, Live Streaming Content>
+<Newsletter Creation, partOf, Content Localization>
+<Plagiarism Checking, connectedTo, Fact_Checking>
+<Plagiarism Checking, partOf, Content Management System Operation>
+<Podcast Production, connectedTo, Drafting Content>
+<Podcast Production, connectedTo, Editing and Proofreading>
+<Search Engine Optimization, connectedTo, E_book Writing>
+<start, connectedTo, Audience Engagement>
+<start, connectedTo, Fact_Checking>
+<start, connectedTo, Search Engine Optimization>
diff --git a/test/mermaid/hard/mermaid_179.mmd b/test/mermaid/hard/mermaid_179.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..d2abccb760faa0fdb0a8fd5553982e7ea4ed1f7c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_179.mmd
@@ -0,0 +1,152 @@
+graph RL
+    N0([Interactive Content Development])
+    N1(Audio Recording)
+    N2[Content Repurposing]
+    N3[(Social Media Post Creation)]
+    N4[[Research and Outline]]
+    N5[Content Management System Operation]
+    N6{Drafting Content}
+    N7[/Audience Engagement/]
+    N8{Graphic Design}
+    N9(Branding)
+    N10[Live Streaming Content]
+    N11(Content Localization)
+    N12{Podcast Production}
+    N13(Animation)
+    N14[Influencer Collaboration]
+    N15([E_book Writing])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Newsletter Creation
+        nest0_0[/Photography/]
+        nest0_1{Publishing}
+        nest0_2(Content Strategy Development)
+    end
+    subgraph Voice Acting or Narration
+        nest1_0[Performance Tracking]
+        nest1_1(Ideation and Brainstorming)
+        nest1_2{Search Engine Optimization}
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> |distributes| N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N6 --> nest0_0
+    nest0_2 --> N12
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N8 -.-> nest1_0
+    nest1_2 -.-> N2
+    N10 --> S0
+    S0 -.-> N14
+    S0 --> N12
+    S0 --> N13
+    N0 -.-> S1
+    S1 --> N7
+    S1 -.-> N2
+    S1 --> N15
+    N11 -.-> S2
+    S2 --> N14
+    S2 -.-> N13
+    S2 --> N15
+    N4 --> M0
+    N6 --> M0
+    N7 --> M0
+    M0 -.-> N13
+    N5 -.-> M1
+    N1 -.-> M1
+    M1 -.-> N9
+    N0 --> M2
+    N1 -.-> M2
+    M2 --> N6
+    style N0 fill:#CFD8DC,stroke:#607D8B
+    style N1 fill:#E1BEE7,stroke:#9C27B0
+    style N2 fill:#E1BEE7,stroke:#9C27B0
+    style N3 fill:#E1BEE7,stroke:#9C27B0
+    style N4 fill:#E8F0FF,stroke:#A2D0FF
+    style N5 fill:#CFD8DC,stroke:#607D8B
+    style N6 fill:#E1BEE7,stroke:#9C27B0
+    style N7 fill:#CFD8DC,stroke:#607D8B
+    style N8 fill:#E1BEE7,stroke:#9C27B0
+    style N9 fill:#CFD8DC,stroke:#607D8B
+    style N10 fill:#CFD8DC,stroke:#607D8B
+    style N11 fill:#CFD8DC,stroke:#607D8B
+    style N12 fill:#CFD8DC,stroke:#607D8B
+    style N13 fill:#CFD8DC,stroke:#607D8B
+    style N14 fill:#CFD8DC,stroke:#607D8B
+    style N15 fill:#E8F0FF,stroke:#A2D0FF
+    style S0 fill:#CFD8DC,stroke:#607D8B
+    style S1 fill:#E8F0FF,stroke:#A2D0FF
+    style S2 fill:#E1BEE7,stroke:#9C27B0
+    style M0 fill:#E8F0FF,stroke:#A2D0FF
+    style M1 fill:#E1BEE7,stroke:#9C27B0
+    style M2 fill:#E1BEE7,stroke:#9C27B0
+    style nest0_0 fill:#E8F0FF,stroke:#A2D0FF
+    style nest0_1 fill:#CFD8DC,stroke:#607D8B
+    style nest0_2 fill:#E8F0FF,stroke:#A2D0FF
+    style nest1_0 fill:#CFD8DC,stroke:#607D8B
+    style nest1_1 fill:#CFD8DC,stroke:#607D8B
+    style nest1_2 fill:#E8F0FF,stroke:#A2D0FF
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 44 stroke:#607D8B,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_18.mmd b/test/mermaid/hard/mermaid_18.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..87da33f9f3073576040e55279cf39b7a3c35dae0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_18.mmd
@@ -0,0 +1,152 @@
+graph RL
+    N0([Fleet Management])
+    N1{Luggage Handling}
+    N2[Navigation Update]
+    N3[/Electric Vehicle Charging/]
+    N4(Parking Management)
+    N5[/Delay Alert/]
+    N6[Security Check]
+    N7[/Schedule Generation/]
+    N8([Weather Impact Assessment])
+    N9[/Train Dispatch/]
+    N10(Passenger Feedback)
+    N11(Cargo Loading)
+    N12{Location Input}
+    N13[Vehicle Assignment]
+    N14{Customs Clearance}
+    N15[Intermodal Transfer]
+    N16([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Route Diversion
+        nest0_0[/Ride_sharing Request/]
+        nest0_1{Public Transport Ticketing}
+        nest0_2(Fueling)
+        nest0_3(Driver Allocation)
+    end
+    subgraph Ticket Purchase
+        nest1_0[Boarding]
+        nest1_1(Maintenance Check)
+        nest1_2(Arrival)
+    end
+    N0 --> |arrives| N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 -.-> N13
+    N13 --> N14
+    N14 -.-> N15
+    N15 -.-> |insures| N16
+    nest0_0 --> |diversifies| nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N8 --> nest0_0
+    nest0_3 --> N10
+    nest1_0 -.-> |predicts| nest1_1
+    nest1_1 -.-> nest1_2
+    N1 --> nest1_0
+    nest1_2 -.-> N4
+    N9 --> S0
+    S0 --> N11
+    S0 --> N12
+    S0 --> N13
+    S0 -.-> N15
+    N11 --> S1
+    S1 -.-> N13
+    S1 -.-> N14
+    S1 --> N15
+    N10 -.-> S2
+    S2 --> N16
+    S2 --> N14
+    N2 --> M0
+    N3 --> |rescues| M0
+    M0 -.-> N5
+    N1 --> M1
+    N2 --> M1
+    N4 -.-> |assigns| M1
+    M1 --> N6
+    style N0 fill:#D0EFEE,stroke:#73C6BC
+    style N1 fill:#D0EFEE,stroke:#73C6BC
+    style N2 fill:#D0EFEE,stroke:#73C6BC
+    style N3 fill:#E6EE9C,stroke:#CDDC39
+    style N4 fill:#E6EE9C,stroke:#CDDC39
+    style N5 fill:#ECF0FD,stroke:#B8C0F5
+    style N6 fill:#ECF0FD,stroke:#B8C0F5
+    style N7 fill:#ECF0FD,stroke:#B8C0F5
+    style N8 fill:#ECF0FD,stroke:#B8C0F5
+    style N9 fill:#E6EE9C,stroke:#CDDC39
+    style N10 fill:#ECF0FD,stroke:#B8C0F5
+    style N11 fill:#ECF0FD,stroke:#B8C0F5
+    style N12 fill:#E6EE9C,stroke:#CDDC39
+    style N13 fill:#ECF0FD,stroke:#B8C0F5
+    style N14 fill:#D0EFEE,stroke:#73C6BC
+    style N15 fill:#ECF0FD,stroke:#B8C0F5
+    style N16 fill:#E6EE9C,stroke:#CDDC39
+    style S0 fill:#E6EE9C,stroke:#CDDC39
+    style S1 fill:#D0EFEE,stroke:#73C6BC
+    style S2 fill:#E6EE9C,stroke:#CDDC39
+    style M0 fill:#ECF0FD,stroke:#B8C0F5
+    style M1 fill:#ECF0FD,stroke:#B8C0F5
+    style nest0_0 fill:#D0EFEE,stroke:#73C6BC
+    style nest0_1 fill:#ECF0FD,stroke:#B8C0F5
+    style nest0_2 fill:#E6EE9C,stroke:#CDDC39
+    style nest0_3 fill:#D0EFEE,stroke:#73C6BC
+    style nest1_0 fill:#D0EFEE,stroke:#73C6BC
+    style nest1_1 fill:#D0EFEE,stroke:#73C6BC
+    style nest1_2 fill:#E6EE9C,stroke:#CDDC39
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#B8C0F5,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_18.txt b/test/mermaid/hard/mermaid_18.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c844b36cd79c99c48484373952deb7e6758d33ec
--- /dev/null
+++ b/test/mermaid/hard/mermaid_18.txt
@@ -0,0 +1,46 @@
+<Arrival, connectedTo, Parking Management>
+<Arrival, partOf, Ticket Purchase>
+<Boarding, partOf, Ticket Purchase>
+<Boarding, predicts, Maintenance Check>
+<Cargo Loading, connectedTo, Customs Clearance>
+<Cargo Loading, connectedTo, Intermodal Transfer>
+<Cargo Loading, connectedTo, Location Input>
+<Cargo Loading, connectedTo, Vehicle Assignment>
+<Customs Clearance, connectedTo, Intermodal Transfer>
+<Delay Alert, connectedTo, Security Check>
+<Driver Allocation, connectedTo, Passenger Feedback>
+<Driver Allocation, partOf, Route Diversion>
+<Electric Vehicle Charging, connectedTo, Parking Management>
+<Electric Vehicle Charging, rescues, Delay Alert>
+<Fleet Management, arrives, Luggage Handling>
+<Fueling, connectedTo, Driver Allocation>
+<Fueling, partOf, Route Diversion>
+<Intermodal Transfer, insures, end>
+<Location Input, connectedTo, Vehicle Assignment>
+<Luggage Handling, connectedTo, Boarding>
+<Luggage Handling, connectedTo, Navigation Update>
+<Luggage Handling, connectedTo, Security Check>
+<Maintenance Check, connectedTo, Arrival>
+<Maintenance Check, partOf, Ticket Purchase>
+<Navigation Update, connectedTo, Delay Alert>
+<Navigation Update, connectedTo, Electric Vehicle Charging>
+<Navigation Update, connectedTo, Security Check>
+<Parking Management, assigns, Security Check>
+<Parking Management, connectedTo, Delay Alert>
+<Passenger Feedback, connectedTo, Cargo Loading>
+<Passenger Feedback, connectedTo, Customs Clearance>
+<Passenger Feedback, connectedTo, end>
+<Public Transport Ticketing, connectedTo, Fueling>
+<Public Transport Ticketing, partOf, Route Diversion>
+<Ride_sharing Request, diversifies, Public Transport Ticketing>
+<Ride_sharing Request, partOf, Route Diversion>
+<Schedule Generation, connectedTo, Weather Impact Assessment>
+<Security Check, connectedTo, Schedule Generation>
+<Train Dispatch, connectedTo, Cargo Loading>
+<Train Dispatch, connectedTo, Intermodal Transfer>
+<Train Dispatch, connectedTo, Location Input>
+<Train Dispatch, connectedTo, Passenger Feedback>
+<Train Dispatch, connectedTo, Vehicle Assignment>
+<Vehicle Assignment, connectedTo, Customs Clearance>
+<Weather Impact Assessment, connectedTo, Ride_sharing Request>
+<Weather Impact Assessment, connectedTo, Train Dispatch>
diff --git a/test/mermaid/hard/mermaid_180.txt b/test/mermaid/hard/mermaid_180.txt
new file mode 100644
index 0000000000000000000000000000000000000000..1a8a51763bdcf5cd10ef3b6bf50ea3ec79ae620e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_180.txt
@@ -0,0 +1,41 @@
+<Animation, connectedTo, Audience Analysis>
+<Animation, connectedTo, Audience Engagement>
+<Animation, connectedTo, Publishing>
+<Audience Analysis, connectedTo, Audience Engagement>
+<Audience Analysis, connectedTo, Publishing>
+<Audience Analysis, connectedTo, Transcribing Audio or Video>
+<Audience Engagement, connectedTo, Social Media Post Creation>
+<Blog Post Writing, connectedTo, Drafting Content>
+<Blog Post Writing, partOf, Research and Outline>
+<Branding, connectedTo, Animation>
+<Call to Action Design, localizes, Editing and Proofreading>
+<Content Management System Operation, connectedTo, Content Strategy Development>
+<Content Management System Operation, connectedTo, Photography>
+<Content Repurposing, connectedTo, Monetization Strategy>
+<Content Strategy Development, connectedTo, Search Engine Optimization>
+<Drafting Content, connectedTo, Photography>
+<Drafting Content, partOf, Research and Outline>
+<E_book Writing, connectedTo, Branding>
+<Editing and Proofreading, connectedTo, end>
+<Graphic Design, connectedTo, Publishing>
+<Ideation and Brainstorming, connectedTo, Blog Post Writing>
+<Ideation and Brainstorming, partOf, Research and Outline>
+<Keyword Research, connectedTo, Graphic Design>
+<Monetization Strategy, connectedTo, Keyword Research>
+<Performance Tracking, connectedTo, Animation>
+<Performance Tracking, partOf, Fact_Checking>
+<Photography, connectedTo, E_book Writing>
+<Publishing, connectedTo, Call to Action Design>
+<Search Engine Optimization, connectedTo, Photography>
+<Search Engine Optimization, connectedTo, Publishing>
+<Search Engine Optimization, connectedTo, User_Generated Content Curation>
+<Search Engine Optimization, connectedTo, Webinar Hosting>
+<Social Media Post Creation, connectedTo, Content Repurposing>
+<Social Media Post Creation, connectedTo, Ideation and Brainstorming>
+<Transcribing Audio or Video, connectedTo, Audience Engagement>
+<Transcribing Audio or Video, connectedTo, Content Repurposing>
+<Transcribing Audio or Video, connectedTo, Social Media Post Creation>
+<User_Generated Content Curation, connectedTo, Audience Engagement>
+<User_Generated Content Curation, connectedTo, Photography>
+<Webinar Hosting, connectedTo, Performance Tracking>
+<Webinar Hosting, partOf, Fact_Checking>
diff --git a/test/mermaid/hard/mermaid_181.mmd b/test/mermaid/hard/mermaid_181.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..dbd5bf37c494cb5be3d316b9058437f92b82c07e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_181.mmd
@@ -0,0 +1,128 @@
+graph TD
+    N0([start])
+    N1[[Data Pipeline Development]]
+    N2(Social Media Analytics)
+    N3{Customer Analytics}
+    N4[Exploratory Data Analysis]
+    N5(Data Governance)
+    N6[Financial Data Analysis]
+    N7(Machine Learning Integration)
+    N8[(Data Cleaning)]
+    N9([Business User Training on Analytics])
+    N10{Data Mining}
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Web Analytics
+        nest0_0{Data Visualization}
+        nest0_1[Report Generation]
+    end
+    subgraph HR Data Analytics
+        nest1_0[ETL Process Management]
+        nest1_1[Natural Language Processing for Data]
+        nest1_2[/Cloud_based Data Platforms/]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    nest0_0 -.-> nest0_1
+    N7 -.-> nest0_0
+    nest0_1 -.-> N9
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N7 --> nest1_0
+    nest1_2 --> N2
+    N4 --> S0
+    S0 --> N10
+    S0 --> N9
+    S0 -.-> N8
+    N1 -.-> S1
+    S1 -.-> N9
+    S1 -.-> N10
+    S1 --> N8
+    N2 --> S2
+    S2 -.-> N5
+    S2 --> N6
+    S2 --> N9
+    S2 --> N4
+    N4 -.-> M0
+    N2 --> M0
+    M0 --> N7
+    N0 --> M1
+    N7 -.-> M1
+    M1 --> N10
+    N0 -.-> M2
+    N1 --> M2
+    M2 -.-> N3
+    style N0 fill:#F0F0F0,stroke:#D2D2D2
+    style N1 fill:#FFF3E0,stroke:#FFA726
+    style N2 fill:#F0F0F0,stroke:#D2D2D2
+    style N3 fill:#FFF3E0,stroke:#FFA726
+    style N4 fill:#D6D9F0,stroke:#9FA9E1
+    style N5 fill:#FFF3E0,stroke:#FFA726
+    style N6 fill:#FFF3E0,stroke:#FFA726
+    style N7 fill:#FFF3E0,stroke:#FFA726
+    style N8 fill:#F0F0F0,stroke:#D2D2D2
+    style N9 fill:#F0F0F0,stroke:#D2D2D2
+    style N10 fill:#D6D9F0,stroke:#9FA9E1
+    style S0 fill:#FFF3E0,stroke:#FFA726
+    style S1 fill:#FFF3E0,stroke:#FFA726
+    style S2 fill:#F0F0F0,stroke:#D2D2D2
+    style M0 fill:#F0F0F0,stroke:#D2D2D2
+    style M1 fill:#F0F0F0,stroke:#D2D2D2
+    style M2 fill:#FFF3E0,stroke:#FFA726
+    style nest0_0 fill:#D6D9F0,stroke:#9FA9E1
+    style nest0_1 fill:#D6D9F0,stroke:#9FA9E1
+    style nest1_0 fill:#D6D9F0,stroke:#9FA9E1
+    style nest1_1 fill:#D6D9F0,stroke:#9FA9E1
+    style nest1_2 fill:#FFF3E0,stroke:#FFA726
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#D2D2D2,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_182.txt b/test/mermaid/hard/mermaid_182.txt
new file mode 100644
index 0000000000000000000000000000000000000000..4ef49012c0225a8f73859aa0f1869261acd7ca18
--- /dev/null
+++ b/test/mermaid/hard/mermaid_182.txt
@@ -0,0 +1,47 @@
+<A or B Testing Analysis, connectedTo, Data Quality Assurance>
+<A or B Testing Analysis, connectedTo, Machine Learning Integration>
+<A or B Testing Analysis, optimizes, Financial Data Analysis>
+<Business User Training on Analytics, connectedTo, Geospatial Analysis>
+<Business User Training on Analytics, partOf, HR Data Analytics>
+<Cloud_based Data Platforms, connectedTo, Data Collection>
+<Cloud_based Data Platforms, partOf, Data Visualization>
+<Dashboard Creation, connectedTo, Healthcare Data Analysis>
+<Dashboard Creation, connectedTo, Sentiment Analysis>
+<Data Cleaning, connectedTo, Business User Training on Analytics>
+<Data Cleaning, partOf, HR Data Analytics>
+<Data Collection, connectedTo, Data Cleaning>
+<Data Collection, connectedTo, Sales Performance Analysis>
+<Data Governance, connectedTo, Social Media Analytics>
+<Data Mining, connectedTo, Natural Language Processing for Data>
+<Data Mining, partOf, Data Visualization>
+<Data Quality Assurance, connectedTo, Operational Efficiency Metrics>
+<Data Quality Assurance, connectedTo, Supply Chain Analytics>
+<Data Quality Assurance, predicts, Data Collection>
+<Data Quality Assurance, secures, Statistical Modeling>
+<ETL Process Management, connectedTo, A or B Testing Analysis>
+<ETL Process Management, connectedTo, Data Quality Assurance>
+<ETL Process Management, connectedTo, Machine Learning Integration>
+<ETL Process Management, connectedTo, end>
+<Financial Data Analysis, connectedTo, Healthcare Data Analysis>
+<Geospatial Analysis, connectedTo, Healthcare Data Analysis>
+<Geospatial Analysis, partOf, HR Data Analytics>
+<Healthcare Data Analysis, connectedTo, Data Collection>
+<Machine Learning Integration, connectedTo, Financial Data Analysis>
+<Machine Learning Integration, extracts, Data Quality Assurance>
+<Natural Language Processing for Data, connectedTo, Cloud_based Data Platforms>
+<Natural Language Processing for Data, partOf, Data Visualization>
+<Operational Efficiency Metrics, connectedTo, Statistical Modeling>
+<Report Generation, connectedTo, Data Mining>
+<Report Generation, partOf, Data Visualization>
+<Risk Analytics, connectedTo, Financial Data Analysis>
+<Risk Analytics, connectedTo, Healthcare Data Analysis>
+<Sales Performance Analysis, connectedTo, Operational Efficiency Metrics>
+<Sentiment Analysis, connectedTo, Data Quality Assurance>
+<Sentiment Analysis, connectedTo, ETL Process Management>
+<Sentiment Analysis, connectedTo, Healthcare Data Analysis>
+<Sentiment Analysis, connectedTo, Report Generation>
+<Social Media Analytics, connectedTo, end>
+<Statistical Modeling, connectedTo, Data Governance>
+<Supply Chain Analytics, connectedTo, Financial Data Analysis>
+<Supply Chain Analytics, connectedTo, Risk Analytics>
+<start, connectedTo, Dashboard Creation>
diff --git a/test/mermaid/hard/mermaid_183.txt b/test/mermaid/hard/mermaid_183.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0430e4baf83d64177f546c8693fdf83fd81341c2
--- /dev/null
+++ b/test/mermaid/hard/mermaid_183.txt
@@ -0,0 +1,32 @@
+<Big Data Processing, connectedTo, Real_time Analytics>
+<Big Data Processing, partOf, Sentiment Analysis>
+<Business User Training on Analytics, connectedTo, Statistical Modeling>
+<Cloud_based Data Platforms, shares, Business User Training on Analytics>
+<Customer Analytics, connectedTo, Data Pipeline Development>
+<Customer Analytics, connectedTo, Data Visualization>
+<Data Collection, connectedTo, Healthcare Data Analysis>
+<Data Pipeline Development, connectedTo, Marketing Campaign Analysis>
+<Data Pipeline Development, connectedTo, Risk Analytics>
+<Data Transformation, connectedTo, Healthcare Data Analysis>
+<Data Transformation, partOf, Sentiment Analysis>
+<Data Visualization, connectedTo, Data Collection>
+<Data Visualization, connectedTo, Data Pipeline Development>
+<Data Visualization, connectedTo, Healthcare Data Analysis>
+<Data Visualization, connectedTo, Operational Efficiency Metrics>
+<ETL Process Management, connectedTo, Cloud_based Data Platforms>
+<ETL Process Management, connectedTo, Data Collection>
+<Financial Data Analysis, connectedTo, Data Collection>
+<Financial Data Analysis, partOf, Sales Performance Analysis>
+<Marketing Campaign Analysis, connectedTo, Data Collection>
+<Operational Efficiency Metrics, connectedTo, Big Data Processing>
+<Operational Efficiency Metrics, connectedTo, Data Collection>
+<Operational Efficiency Metrics, connectedTo, Marketing Campaign Analysis>
+<Operational Efficiency Metrics, researches, Data Pipeline Development>
+<Real_time Analytics, connectedTo, Data Transformation>
+<Real_time Analytics, partOf, Sentiment Analysis>
+<Risk Analytics, connectedTo, Financial Data Analysis>
+<Risk Analytics, partOf, Sales Performance Analysis>
+<Statistical Modeling, connectedTo, Customer Analytics>
+<Statistical Modeling, connectedTo, Data Collection>
+<start, connectedTo, Data Pipeline Development>
+<start, connectedTo, ETL Process Management>
diff --git a/test/mermaid/hard/mermaid_184.mmd b/test/mermaid/hard/mermaid_184.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..f9155a0fbdc7e4620dc484cce9031698d6629475
--- /dev/null
+++ b/test/mermaid/hard/mermaid_184.mmd
@@ -0,0 +1,79 @@
+graph TD
+    N0([start])
+    N1(Customer Behavior Insights)
+    N2[/Strategic Planning Support/]
+    N3[/Cloud BI Solutions/]
+    N4(Sales Forecasting)
+    N5[Data Storytelling for Business]
+    N6[Executive Summary Reporting]
+    N7{Data Modeling}
+    N8[Financial Performance Reporting]
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Data Governance Policies
+        nest0_0([Data Lineage Tracking])
+        nest0_1[Data Mart Design]
+        nest0_2([ETL Development])
+        nest0_3[[Risk Assessment Reporting]]
+    end
+    subgraph Self_Service BI Tools
+        nest1_0{Dashboard Design}
+        nest1_1[/Market Trend Analysis/]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N5 -.-> nest0_0
+    nest0_3 --> N3
+    nest1_0 -.-> nest1_1
+    N2 -.-> nest1_0
+    nest1_1 -.-> N8
+    N4 --> S1
+    S1 -.-> N7
+    S1 --> N8
+    N4 -.-> M0
+    N5 --> M0
+    M0 -.-> N8
+    N3 --> M2
+    N4 -.-> M2
+    N1 --> M2
+    M2 -.-> N7
+    style S1 fill:#E0F2F1,stroke:#26A69A
+    style M0 fill:#F1F8FF,stroke:#42A5F5
+    style M2 fill:#D1C4E9,stroke:#673AB7
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#26A69A,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_184.txt b/test/mermaid/hard/mermaid_184.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7c13a3647b89e07099b26837d07271c7e5efd61f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_184.txt
@@ -0,0 +1,27 @@
+<Cloud BI Solutions, connectedTo, Data Modeling>
+<Cloud BI Solutions, connectedTo, Sales Forecasting>
+<Customer Behavior Insights, connectedTo, Data Modeling>
+<Customer Behavior Insights, connectedTo, Strategic Planning Support>
+<Dashboard Design, connectedTo, Market Trend Analysis>
+<Dashboard Design, partOf, Self_Service BI Tools>
+<Data Lineage Tracking, connectedTo, Data Mart Design>
+<Data Lineage Tracking, partOf, Data Governance Policies>
+<Data Mart Design, connectedTo, ETL Development>
+<Data Mart Design, partOf, Data Governance Policies>
+<Data Modeling, connectedTo, Financial Performance Reporting>
+<Data Storytelling for Business, connectedTo, Data Lineage Tracking>
+<Data Storytelling for Business, connectedTo, Executive Summary Reporting>
+<Data Storytelling for Business, connectedTo, Financial Performance Reporting>
+<ETL Development, connectedTo, Risk Assessment Reporting>
+<ETL Development, partOf, Data Governance Policies>
+<Executive Summary Reporting, connectedTo, Data Modeling>
+<Market Trend Analysis, connectedTo, Financial Performance Reporting>
+<Market Trend Analysis, partOf, Self_Service BI Tools>
+<Risk Assessment Reporting, connectedTo, Cloud BI Solutions>
+<Risk Assessment Reporting, partOf, Data Governance Policies>
+<Sales Forecasting, connectedTo, Data Modeling>
+<Sales Forecasting, connectedTo, Data Storytelling for Business>
+<Sales Forecasting, connectedTo, Financial Performance Reporting>
+<Strategic Planning Support, connectedTo, Cloud BI Solutions>
+<Strategic Planning Support, connectedTo, Dashboard Design>
+<start, connectedTo, Customer Behavior Insights>
diff --git a/test/mermaid/hard/mermaid_185.mmd b/test/mermaid/hard/mermaid_185.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..23918cc1f24f5aa11ee900cf1f824dd58e30c78b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_185.mmd
@@ -0,0 +1,118 @@
+graph RL
+    N0([start])
+    N1(Market Trend Analysis)
+    N2(Actionable Insights Generation)
+    N3(Financial Performance Reporting)
+    N4[/KPI Definition/]
+    N5([Real_time BI Dashboards])
+    N6[(Data Quality Management)]
+    N7([Cloud BI Solutions])
+    N8[Prescriptive Analytics Implementation]
+    N9[[Customer Behavior Insights]]
+    N10([Mobile BI Development])
+    N11[[Performance Monitoring]]
+    N12[Supply Chain Optimization]
+    N13[(Dashboard Design)]
+    N14([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Query Optimization
+        nest0_0([Sales Forecasting])
+        nest0_1[Operational Efficiency Measurement]
+        nest0_2(Embedded Analytics)
+    end
+    subgraph BI Platform Administration
+        nest1_0(Self_Service BI Tools)
+        nest1_1[[Data Modeling]]
+        nest1_2[/Strategic Planning Support/]
+        nest1_3[Data Lineage Tracking]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N11 -.-> nest0_0
+    nest0_2 -.-> N8
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> nest1_3
+    N3 -.-> nest1_0
+    nest1_3 -.-> N4
+    N7 --> S0
+    S0 --> N14
+    S0 --> N10
+    S0 -.-> N12
+    S0 -.-> N11
+    N6 --> S1
+    S1 --> N11
+    S1 -.-> N12
+    N11 --> S2
+    S2 --> N13
+    S2 -.-> N14
+    N5 -.-> M0
+    N4 --> |no| M0
+    M0 -.-> N7
+    N7 --> M1
+    N9 --> M1
+    M1 -.-> N13
+    style S0 fill:#F8BBD0,stroke:#E91E63
+    style S1 fill:#F8BBD0,stroke:#E91E63
+    style S2 fill:#F9FBE7,stroke:#C0CA33
+    style M0 fill:#F9FBE7,stroke:#C0CA33
+    style M1 fill:#D1C4E9,stroke:#673AB7
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#673AB7,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_185.txt b/test/mermaid/hard/mermaid_185.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ce2db94f78efa01863b3e14519bc2c51f0f686f7
--- /dev/null
+++ b/test/mermaid/hard/mermaid_185.txt
@@ -0,0 +1,42 @@
+<Actionable Insights Generation, connectedTo, Financial Performance Reporting>
+<Cloud BI Solutions, connectedTo, Dashboard Design>
+<Cloud BI Solutions, connectedTo, Mobile BI Development>
+<Cloud BI Solutions, connectedTo, Performance Monitoring>
+<Cloud BI Solutions, connectedTo, Prescriptive Analytics Implementation>
+<Cloud BI Solutions, connectedTo, Supply Chain Optimization>
+<Cloud BI Solutions, connectedTo, end>
+<Customer Behavior Insights, connectedTo, Dashboard Design>
+<Customer Behavior Insights, connectedTo, Mobile BI Development>
+<Dashboard Design, connectedTo, end>
+<Data Lineage Tracking, connectedTo, KPI Definition>
+<Data Lineage Tracking, partOf, BI Platform Administration>
+<Data Modeling, connectedTo, Strategic Planning Support>
+<Data Modeling, partOf, BI Platform Administration>
+<Data Quality Management, connectedTo, Cloud BI Solutions>
+<Data Quality Management, connectedTo, Performance Monitoring>
+<Data Quality Management, connectedTo, Supply Chain Optimization>
+<Embedded Analytics, connectedTo, Prescriptive Analytics Implementation>
+<Embedded Analytics, partOf, Query Optimization>
+<Financial Performance Reporting, connectedTo, KPI Definition>
+<Financial Performance Reporting, connectedTo, Self_Service BI Tools>
+<KPI Definition, connectedTo, Real_time BI Dashboards>
+<KPI Definition, no, Cloud BI Solutions>
+<Market Trend Analysis, connectedTo, Actionable Insights Generation>
+<Mobile BI Development, connectedTo, Performance Monitoring>
+<Operational Efficiency Measurement, connectedTo, Embedded Analytics>
+<Operational Efficiency Measurement, partOf, Query Optimization>
+<Performance Monitoring, connectedTo, Dashboard Design>
+<Performance Monitoring, connectedTo, Sales Forecasting>
+<Performance Monitoring, connectedTo, Supply Chain Optimization>
+<Performance Monitoring, connectedTo, end>
+<Prescriptive Analytics Implementation, connectedTo, Customer Behavior Insights>
+<Real_time BI Dashboards, connectedTo, Cloud BI Solutions>
+<Real_time BI Dashboards, connectedTo, Data Quality Management>
+<Sales Forecasting, connectedTo, Operational Efficiency Measurement>
+<Sales Forecasting, partOf, Query Optimization>
+<Self_Service BI Tools, connectedTo, Data Modeling>
+<Self_Service BI Tools, partOf, BI Platform Administration>
+<Strategic Planning Support, connectedTo, Data Lineage Tracking>
+<Strategic Planning Support, partOf, BI Platform Administration>
+<Supply Chain Optimization, connectedTo, Dashboard Design>
+<start, connectedTo, Market Trend Analysis>
diff --git a/test/mermaid/hard/mermaid_186.mmd b/test/mermaid/hard/mermaid_186.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..94cf7432ef1db4f812a3d5c1f4e9e6f4d5ae5628
--- /dev/null
+++ b/test/mermaid/hard/mermaid_186.mmd
@@ -0,0 +1,126 @@
+graph LR
+    N0([start])
+    N1[/Data Warehousing/]
+    N2([Data Governance Policies])
+    N3[Report Automation]
+    N4[[Data Storytelling for Business]]
+    N5[(Financial Performance Reporting)]
+    N6[/Sales Forecasting/]
+    N7[Embedded Analytics]
+    N8(Operational Efficiency Measurement)
+    N9(Data Modeling)
+    N10[(Cloud BI Solutions)]
+    N11([Risk Assessment Reporting])
+    N12[(Competitive Analysis)]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Master Data Management
+        nest0_0([BI Platform Administration])
+        nest0_1(User Training and Support)
+        nest0_2[[Market Trend Analysis]]
+        nest0_3([Data Security in BI])
+    end
+    subgraph Data Quality Management
+        nest1_0[(Actionable Insights Generation)]
+        nest1_1{Data Lineage Tracking}
+        nest1_2[Customer Behavior Insights]
+        nest1_3[[Data Source Integration]]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> |secures| N5
+    N5 --> N6
+    N6 --> |reports| N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 --> N12
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N4 --> nest0_0
+    nest0_3 --> N9
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 -.-> |controls| nest1_3
+    N2 --> nest1_0
+    nest1_3 -.-> N2
+    N3 --> S0
+    S0 -.-> N8
+    S0 --> N12
+    N9 -.-> S1
+    S1 -.-> N11
+    S1 --> |evaluates| N12
+    N1 -.-> |presents| M0
+    N0 --> M0
+    M0 --> N3
+    N6 -.-> M1
+    N3 -.-> M1
+    N0 --> M1
+    M1 -.-> N9
+    style N0 fill:#FFF6D9,stroke:#FFCC7A
+    style N1 fill:#DACBE3,stroke:#A188D0
+    style N2 fill:#FFCCBC,stroke:#FF5722
+    style N3 fill:#FFCCBC,stroke:#FF5722
+    style N4 fill:#DACBE3,stroke:#A188D0
+    style N5 fill:#DACBE3,stroke:#A188D0
+    style N6 fill:#FFCCBC,stroke:#FF5722
+    style N7 fill:#FFF6D9,stroke:#FFCC7A
+    style N8 fill:#FFF6D9,stroke:#FFCC7A
+    style N9 fill:#FFCCBC,stroke:#FF5722
+    style N10 fill:#FFCCBC,stroke:#FF5722
+    style N11 fill:#FFF6D9,stroke:#FFCC7A
+    style N12 fill:#FFCCBC,stroke:#FF5722
+    style S0 fill:#FFF6D9,stroke:#FFCC7A
+    style S1 fill:#FFCCBC,stroke:#FF5722
+    style M0 fill:#DACBE3,stroke:#A188D0
+    style M1 fill:#DACBE3,stroke:#A188D0
+    style nest0_0 fill:#FFF6D9,stroke:#FFCC7A
+    style nest0_1 fill:#FFCCBC,stroke:#FF5722
+    style nest0_2 fill:#FFF6D9,stroke:#FFCC7A
+    style nest0_3 fill:#FFCCBC,stroke:#FF5722
+    style nest1_0 fill:#FFF6D9,stroke:#FFCC7A
+    style nest1_1 fill:#DACBE3,stroke:#A188D0
+    style nest1_2 fill:#DACBE3,stroke:#A188D0
+    style nest1_3 fill:#FFCCBC,stroke:#FF5722
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFCC7A,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_186.txt b/test/mermaid/hard/mermaid_186.txt
new file mode 100644
index 0000000000000000000000000000000000000000..45a845a373a95b3312318550a3f8a7b8f0547eb7
--- /dev/null
+++ b/test/mermaid/hard/mermaid_186.txt
@@ -0,0 +1,39 @@
+<Actionable Insights Generation, connectedTo, Data Lineage Tracking>
+<Actionable Insights Generation, partOf, Data Quality Management>
+<BI Platform Administration, connectedTo, User Training and Support>
+<BI Platform Administration, partOf, Master Data Management>
+<Cloud BI Solutions, connectedTo, Risk Assessment Reporting>
+<Customer Behavior Insights, controls, Data Source Integration>
+<Customer Behavior Insights, partOf, Data Quality Management>
+<Data Governance Policies, connectedTo, Actionable Insights Generation>
+<Data Governance Policies, connectedTo, Report Automation>
+<Data Lineage Tracking, connectedTo, Customer Behavior Insights>
+<Data Lineage Tracking, partOf, Data Quality Management>
+<Data Modeling, connectedTo, Cloud BI Solutions>
+<Data Modeling, connectedTo, Risk Assessment Reporting>
+<Data Modeling, evaluates, Competitive Analysis>
+<Data Security in BI, connectedTo, Data Modeling>
+<Data Security in BI, partOf, Master Data Management>
+<Data Source Integration, connectedTo, Data Governance Policies>
+<Data Source Integration, partOf, Data Quality Management>
+<Data Storytelling for Business, connectedTo, BI Platform Administration>
+<Data Storytelling for Business, secures, Financial Performance Reporting>
+<Data Warehousing, connectedTo, Data Governance Policies>
+<Data Warehousing, presents, Report Automation>
+<Embedded Analytics, connectedTo, Operational Efficiency Measurement>
+<Financial Performance Reporting, connectedTo, Sales Forecasting>
+<Market Trend Analysis, connectedTo, Data Security in BI>
+<Market Trend Analysis, partOf, Master Data Management>
+<Operational Efficiency Measurement, connectedTo, Data Modeling>
+<Report Automation, connectedTo, Competitive Analysis>
+<Report Automation, connectedTo, Data Modeling>
+<Report Automation, connectedTo, Data Storytelling for Business>
+<Report Automation, connectedTo, Operational Efficiency Measurement>
+<Risk Assessment Reporting, connectedTo, Competitive Analysis>
+<Sales Forecasting, connectedTo, Data Modeling>
+<Sales Forecasting, reports, Embedded Analytics>
+<User Training and Support, connectedTo, Market Trend Analysis>
+<User Training and Support, partOf, Master Data Management>
+<start, connectedTo, Data Modeling>
+<start, connectedTo, Data Warehousing>
+<start, connectedTo, Report Automation>
diff --git a/test/mermaid/hard/mermaid_187.txt b/test/mermaid/hard/mermaid_187.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6fddf37b7cdb3eccb60a9aaa52f051a69b2e9923
--- /dev/null
+++ b/test/mermaid/hard/mermaid_187.txt
@@ -0,0 +1,38 @@
+<Affiliate Marketing, connectedTo, Campaign Performance Tracking>
+<Affiliate Marketing, partOf, Podcast Marketing>
+<Brand Strategy Development, connectedTo, Competitive Analysis>
+<Brand Strategy Development, connectedTo, Event Marketing>
+<Brand Strategy Development, connectedTo, Market Research>
+<Brand Strategy Development, connectedTo, Marketing Budget Allocation>
+<Brand Strategy Development, tracks performance, Target Audience Identification>
+<Campaign Performance Tracking, connectedTo, Partnership Marketing>
+<Campaign Performance Tracking, partOf, Podcast Marketing>
+<Competitive Analysis, connectedTo, Event Marketing>
+<Competitive Analysis, connectedTo, Market Research>
+<Competitive Analysis, launches campaigns, Promotional Campaigns>
+<Guerilla Marketing, connectedTo, Market Research>
+<Guerilla Marketing, partOf, Loyalty Programs>
+<Influencer Marketing, connectedTo, Guerilla Marketing>
+<Influencer Marketing, partOf, Loyalty Programs>
+<Market Research, connectedTo, Marketing Automation>
+<Market Research, connectedTo, Marketing Budget Allocation>
+<Market Research, connectedTo, Telemarketing>
+<Marketing Analytics, connectedTo, Influencer Marketing>
+<Marketing Analytics, partOf, Loyalty Programs>
+<Marketing Automation, connectedTo, Affiliate Marketing>
+<Marketing Automation, connectedTo, Telemarketing>
+<Marketing Budget Allocation, connectedTo, Marketing Automation>
+<Partnership Marketing, connectedTo, Remarketing Campaigns>
+<Partnership Marketing, partOf, Podcast Marketing>
+<Personalization Strategies, connectedTo, Competitive Analysis>
+<Personalization Strategies, connectedTo, Event Marketing>
+<Pricing Strategy, connectedTo, Marketing Analytics>
+<Pricing Strategy, partOf, Loyalty Programs>
+<Promotional Campaigns, retargets ads, Market Research>
+<Remarketing Campaigns, partOf, Podcast Marketing>
+<Remarketing Campaigns, runs SEM, Competitive Analysis>
+<Target Audience Identification, connectedTo, Personalization Strategies>
+<Telemarketing, connectedTo, Pricing Strategy>
+<Telemarketing, influences, Event Marketing>
+<start, connectedTo, Brand Strategy Development>
+<start, connectedTo, Event Marketing>
diff --git a/test/mermaid/hard/mermaid_188.mmd b/test/mermaid/hard/mermaid_188.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..6a8529dacc6413f1d255efa383e2dfdaa834ef82
--- /dev/null
+++ b/test/mermaid/hard/mermaid_188.mmd
@@ -0,0 +1,128 @@
+graph LR
+    N0([start])
+    N1[(Experiential Marketing)]
+    N2[[Social Media Marketing]]
+    N3[/Pricing Strategy/]
+    N4[Partnership Marketing]
+    N5([Market Research])
+    N6[/Direct Mail Marketing/]
+    N7[[Brand Reputation Management]]
+    N8[Competitive Analysis]
+    N9[Customer Relationship Management]
+    N10(Website Design and Optimization)
+    N11{Mobile Marketing}
+    N12[/Target Audience Identification/]
+    N13([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Influencer Marketing
+        nest0_0[(Guerilla Marketing)]
+        nest0_1[Loyalty Programs]
+    end
+    subgraph Customer Segmentation
+        nest1_0[(Public Relations)]
+        nest1_1{Search Engine Optimization}
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> N13
+    nest0_0 -.-> nest0_1
+    N2 -.-> nest0_0
+    nest0_1 --> N7
+    nest1_0 --> nest1_1
+    N3 -.-> nest1_0
+    nest1_1 --> N1
+    N10 -.-> S0
+    S0 -.-> |handles PR| N13
+    S0 -.-> N12
+    N6 --> S1
+    S1 --> N12
+    S1 --> |runs SEM| N13
+    S1 --> N11
+    N0 --> |manages budgets| M0
+    N4 -.-> M0
+    N3 --> M0
+    M0 --> N7
+    N0 --> M1
+    N3 -.-> M1
+    N2 -.-> M1
+    N1 -.-> M1
+    M1 -.-> N5
+    N4 -.-> |monitors competitors| M2
+    N2 -.-> M2
+    M2 -.-> N9
+    style N0 fill:#FFE88D,stroke:#FFDA4E
+    style N1 fill:#FCE4EC,stroke:#F06292
+    style N2 fill:#FFE88D,stroke:#FFDA4E
+    style N3 fill:#FCE4EC,stroke:#F06292
+    style N4 fill:#FFF9C4,stroke:#FFEB3B
+    style N5 fill:#FFF9C4,stroke:#FFEB3B
+    style N6 fill:#FFE88D,stroke:#FFDA4E
+    style N7 fill:#FFE88D,stroke:#FFDA4E
+    style N8 fill:#FCE4EC,stroke:#F06292
+    style N9 fill:#FFF9C4,stroke:#FFEB3B
+    style N10 fill:#FFE88D,stroke:#FFDA4E
+    style N11 fill:#FFF9C4,stroke:#FFEB3B
+    style N12 fill:#FCE4EC,stroke:#F06292
+    style N13 fill:#FFE88D,stroke:#FFDA4E
+    style S0 fill:#FFE88D,stroke:#FFDA4E
+    style S1 fill:#FFF9C4,stroke:#FFEB3B
+    style M0 fill:#FFE88D,stroke:#FFDA4E
+    style M1 fill:#FCE4EC,stroke:#F06292
+    style M2 fill:#FFE88D,stroke:#FFDA4E
+    style nest0_0 fill:#FCE4EC,stroke:#F06292
+    style nest0_1 fill:#FFF9C4,stroke:#FFEB3B
+    style nest1_0 fill:#FCE4EC,stroke:#F06292
+    style nest1_1 fill:#FCE4EC,stroke:#F06292
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#F06292,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_189.mmd b/test/mermaid/hard/mermaid_189.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..a75a8d79bb5f4f25d42dae7fffb98d281b91d6b7
--- /dev/null
+++ b/test/mermaid/hard/mermaid_189.mmd
@@ -0,0 +1,118 @@
+graph TD
+    N0([Distribution Channel Management])
+    N1(Pricing Strategy)
+    N2(Influencer Marketing)
+    N3[/Website Design and Optimization/]
+    N4[Marketing Budget Allocation]
+    N5(Customer Journey Mapping)
+    N6([Conversion Rate Optimization])
+    N7(Target Audience Identification)
+    N8(Direct Mail Marketing)
+    N9(Market Research)
+    N10(Search Engine Optimization)
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Video Marketing
+        nest0_0[Campaign Performance Tracking]
+        nest0_1([Telemarketing])
+        nest0_2(Customer Relationship Management)
+    end
+    subgraph Email Marketing
+        nest1_0[Customer Segmentation]
+        nest1_1[[Podcast Marketing]]
+        nest1_2(Social Media Marketing)
+        nest1_3[(Content Marketing)]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> |influences| N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> |creates content| N7
+    N7 --> |manages social media| N8
+    N8 -.-> N9
+    N9 -.-> N10
+    nest0_0 -.-> |automates tasks| nest0_1
+    nest0_1 --> nest0_2
+    N9 -.-> nest0_0
+    nest0_2 -.-> N5
+    nest1_0 --> |sends emails| nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N7 -.-> nest1_0
+    nest1_3 --> N2
+    N6 -.-> S0
+    S0 -.-> N8
+    S0 --> N9
+    N3 -.-> S1
+    S1 -.-> N9
+    S1 --> N7
+    N0 -.-> |promotes sales| M0
+    N3 -.-> M0
+    N2 --> M0
+    M0 --> N9
+    N1 --> M1
+    N2 --> M1
+    N6 -.-> M1
+    N0 --> M1
+    M1 -.-> N10
+    style N0 fill:#E8F0FF,stroke:#A2D0FF
+    style N1 fill:#FFFAE0,stroke:#FFE470
+    style N2 fill:#FFFAE0,stroke:#FFE470
+    style N3 fill:#E8F0FF,stroke:#A2D0FF
+    style N4 fill:#E8F0FF,stroke:#A2D0FF
+    style N5 fill:#E8F0FF,stroke:#A2D0FF
+    style N6 fill:#E8F0FF,stroke:#A2D0FF
+    style N7 fill:#FFFAE0,stroke:#FFE470
+    style N8 fill:#FFFAE0,stroke:#FFE470
+    style N9 fill:#E8F0FF,stroke:#A2D0FF
+    style N10 fill:#FFFAE0,stroke:#FFE470
+    style S0 fill:#FFFAE0,stroke:#FFE470
+    style S1 fill:#E8F0FF,stroke:#A2D0FF
+    style M0 fill:#E8F0FF,stroke:#A2D0FF
+    style M1 fill:#F6F6F6,stroke:#CFCFCF
+    style nest0_0 fill:#FFFAE0,stroke:#FFE470
+    style nest0_1 fill:#E8F0FF,stroke:#A2D0FF
+    style nest0_2 fill:#F6F6F6,stroke:#CFCFCF
+    style nest1_0 fill:#E8F0FF,stroke:#A2D0FF
+    style nest1_1 fill:#F6F6F6,stroke:#CFCFCF
+    style nest1_2 fill:#FFFAE0,stroke:#FFE470
+    style nest1_3 fill:#F6F6F6,stroke:#CFCFCF
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_189.txt b/test/mermaid/hard/mermaid_189.txt
new file mode 100644
index 0000000000000000000000000000000000000000..a48c4dc0eac92c4141c19ae6c8c41f931485fee4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_189.txt
@@ -0,0 +1,36 @@
+<Campaign Performance Tracking, automates tasks, Telemarketing>
+<Campaign Performance Tracking, partOf, Video Marketing>
+<Content Marketing, connectedTo, Influencer Marketing>
+<Content Marketing, partOf, Email Marketing>
+<Conversion Rate Optimization, connectedTo, Direct Mail Marketing>
+<Conversion Rate Optimization, connectedTo, Market Research>
+<Conversion Rate Optimization, connectedTo, Search Engine Optimization>
+<Conversion Rate Optimization, creates content, Target Audience Identification>
+<Customer Journey Mapping, connectedTo, Conversion Rate Optimization>
+<Customer Relationship Management, connectedTo, Customer Journey Mapping>
+<Customer Relationship Management, partOf, Video Marketing>
+<Customer Segmentation, partOf, Email Marketing>
+<Customer Segmentation, sends emails, Podcast Marketing>
+<Direct Mail Marketing, connectedTo, Market Research>
+<Distribution Channel Management, connectedTo, Pricing Strategy>
+<Distribution Channel Management, connectedTo, Search Engine Optimization>
+<Distribution Channel Management, promotes sales, Market Research>
+<Influencer Marketing, connectedTo, Market Research>
+<Influencer Marketing, connectedTo, Search Engine Optimization>
+<Influencer Marketing, connectedTo, Website Design and Optimization>
+<Market Research, connectedTo, Campaign Performance Tracking>
+<Market Research, connectedTo, Search Engine Optimization>
+<Marketing Budget Allocation, connectedTo, Customer Journey Mapping>
+<Podcast Marketing, connectedTo, Social Media Marketing>
+<Podcast Marketing, partOf, Email Marketing>
+<Pricing Strategy, connectedTo, Influencer Marketing>
+<Pricing Strategy, connectedTo, Search Engine Optimization>
+<Social Media Marketing, connectedTo, Content Marketing>
+<Social Media Marketing, partOf, Email Marketing>
+<Target Audience Identification, connectedTo, Customer Segmentation>
+<Target Audience Identification, manages social media, Direct Mail Marketing>
+<Telemarketing, connectedTo, Customer Relationship Management>
+<Telemarketing, partOf, Video Marketing>
+<Website Design and Optimization, connectedTo, Market Research>
+<Website Design and Optimization, connectedTo, Target Audience Identification>
+<Website Design and Optimization, influences, Marketing Budget Allocation>
diff --git a/test/mermaid/hard/mermaid_19.txt b/test/mermaid/hard/mermaid_19.txt
new file mode 100644
index 0000000000000000000000000000000000000000..28949b72a09e480b7ea00cfd41a53261f83a6f50
--- /dev/null
+++ b/test/mermaid/hard/mermaid_19.txt
@@ -0,0 +1,48 @@
+<Consumption Logging, connectedTo, Energy Infrastructure Planning>
+<Consumption Logging, partOf, Regulatory Compliance>
+<Demand Forecast, connectedTo, Energy Infrastructure Planning>
+<Demand Forecast, connectedTo, Grid Balancing>
+<Demand Forecast, connectedTo, Peak Shaving>
+<Demand Forecast, connectedTo, Substation Automation>
+<Demand Forecast, secures, Load Shedding>
+<Energy Efficiency Audit, connectedTo, Consumption Logging>
+<Energy Efficiency Audit, partOf, Regulatory Compliance>
+<Energy Infrastructure Planning, connectedTo, Load Shedding>
+<Energy Market Analysis, connectedTo, Grid Balancing>
+<Energy Storage, connectedTo, Energy Efficiency Audit>
+<Energy Storage, partOf, Regulatory Compliance>
+<Geothermal Power, connectedTo, Grid Modernization>
+<Geothermal Power, partOf, Battery Monitoring>
+<Grid Balancing, alerts, Grid Modernization>
+<Grid Balancing, connectedTo, Load Shedding>
+<Grid Modernization, connectedTo, Load Shedding>
+<Grid Modernization, connectedTo, Renewable Integration>
+<Grid Modernization, trades, Energy Infrastructure Planning>
+<Load Shedding, optimizes, Power Purchase>
+<Oil and Gas Exploration, connectedTo, Energy Infrastructure Planning>
+<Oil and Gas Exploration, connectedTo, Load Shedding>
+<Oil and Gas Exploration, connectedTo, Wind Turbine Monitoring>
+<Oil and Gas Exploration, connectedTo, end>
+<Oil and Gas Exploration, forecasts, Outage Detection>
+<Outage Detection, connectedTo, end>
+<Peak Shaving, connectedTo, Geothermal Power>
+<Peak Shaving, partOf, Battery Monitoring>
+<Power Backup, connectedTo, Energy Infrastructure Planning>
+<Power Backup, connectedTo, Smart Metering>
+<Power Purchase, connectedTo, Outage Detection>
+<Renewable Integration, connectedTo, Energy Storage>
+<Renewable Integration, connectedTo, Load Shedding>
+<Renewable Integration, connectedTo, Transformer Station>
+<Smart Metering, connectedTo, Energy Infrastructure Planning>
+<Smart Metering, connectedTo, Wind Turbine Monitoring>
+<Smart Metering, connectedTo, end>
+<Smart Metering, develops, Oil and Gas Exploration>
+<Smart Metering, researches, Outage Detection>
+<Substation Automation, balances, Grid Balancing>
+<Substation Automation, connectedTo, Energy Market Analysis>
+<Substation Automation, connectedTo, Load Shedding>
+<Transformer Station, connectedTo, Power Backup>
+<Transmission Line Maintenance, connectedTo, Demand Forecast>
+<Transmission Line Maintenance, connectedTo, Energy Infrastructure Planning>
+<Transmission Line Maintenance, connectedTo, Grid Balancing>
+<Wind Turbine Monitoring, connectedTo, Energy Infrastructure Planning>
diff --git a/test/mermaid/hard/mermaid_190.mmd b/test/mermaid/hard/mermaid_190.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..5f6173c70bd0c1a347713ed3b0df6f3d932ee2b4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_190.mmd
@@ -0,0 +1,112 @@
+graph LR
+    N0([Television Advertising])
+    N1[Regulatory Compliance for Ads]
+    N2[Video Advertising]
+    N3{Audience Segmentation for Ads}
+    N4[[Customer Acquisition Cost Analysis]]
+    N5[[Programmatic Advertising]]
+    N6[(Digital Advertising)]
+    N7(Ad Placement Optimization)
+    N8([Ad Creative Development])
+    N9(Ad Network Management)
+    N10{Outdoor Advertising}
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Retargeting Campaigns
+        nest0_0(Direct Response Campaigns)
+        nest0_1([Print Advertising])
+    end
+    subgraph Competitor Ad Analysis
+        nest1_0[/Native Advertising/]
+        nest1_1[Ad Platform Management]
+        nest1_2[/Brand Awareness Campaigns/]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> |creates ads| N10
+    nest0_0 --> nest0_1
+    N6 --> nest0_0
+    nest0_1 -.-> N10
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N4 --> nest1_0
+    nest1_2 --> N6
+    N1 --> S0
+    S0 --> N7
+    S0 -.-> |interprets analytics| N10
+    S0 --> |targets demographics| N8
+    N1 --> S1
+    S1 --> |optimizes campaigns| N10
+    S1 --> N6
+    S1 --> N3
+    N1 -.-> S2
+    S2 -.-> N5
+    S2 --> N4
+    S2 --> N3
+    N1 --> M1
+    N2 -.-> M1
+    N0 --> M1
+    M1 -.-> N4
+    style N0 fill:#FFFDE0,stroke:#FFF8A6
+    style N1 fill:#FFFDE0,stroke:#FFF8A6
+    style N2 fill:#FFFDE0,stroke:#FFF8A6
+    style N3 fill:#FFFDE0,stroke:#FFF8A6
+    style N4 fill:#FFEBEB,stroke:#FFC2C2
+    style N5 fill:#FFEBEB,stroke:#FFC2C2
+    style N6 fill:#E4E0DF,stroke:#BDAFA8
+    style N7 fill:#FFEBEB,stroke:#FFC2C2
+    style N8 fill:#FFEBEB,stroke:#FFC2C2
+    style N9 fill:#E4E0DF,stroke:#BDAFA8
+    style N10 fill:#FFEBEB,stroke:#FFC2C2
+    style S0 fill:#E4E0DF,stroke:#BDAFA8
+    style S1 fill:#FFFDE0,stroke:#FFF8A6
+    style S2 fill:#FFEBEB,stroke:#FFC2C2
+    style M1 fill:#FFFDE0,stroke:#FFF8A6
+    style nest0_0 fill:#FFFDE0,stroke:#FFF8A6
+    style nest0_1 fill:#E4E0DF,stroke:#BDAFA8
+    style nest1_0 fill:#E4E0DF,stroke:#BDAFA8
+    style nest1_1 fill:#E4E0DF,stroke:#BDAFA8
+    style nest1_2 fill:#FFFDE0,stroke:#FFF8A6
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_190.txt b/test/mermaid/hard/mermaid_190.txt
new file mode 100644
index 0000000000000000000000000000000000000000..d77d342286358d95c654e329ab67b649b64a6457
--- /dev/null
+++ b/test/mermaid/hard/mermaid_190.txt
@@ -0,0 +1,32 @@
+<Ad Creative Development, connectedTo, Ad Network Management>
+<Ad Network Management, creates ads, Outdoor Advertising>
+<Ad Placement Optimization, connectedTo, Ad Creative Development>
+<Ad Platform Management, connectedTo, Brand Awareness Campaigns>
+<Ad Platform Management, partOf, Competitor Ad Analysis>
+<Audience Segmentation for Ads, connectedTo, Customer Acquisition Cost Analysis>
+<Brand Awareness Campaigns, connectedTo, Digital Advertising>
+<Brand Awareness Campaigns, partOf, Competitor Ad Analysis>
+<Customer Acquisition Cost Analysis, connectedTo, Native Advertising>
+<Customer Acquisition Cost Analysis, connectedTo, Programmatic Advertising>
+<Digital Advertising, connectedTo, Ad Placement Optimization>
+<Digital Advertising, connectedTo, Direct Response Campaigns>
+<Direct Response Campaigns, connectedTo, Print Advertising>
+<Direct Response Campaigns, partOf, Retargeting Campaigns>
+<Native Advertising, connectedTo, Ad Platform Management>
+<Native Advertising, partOf, Competitor Ad Analysis>
+<Print Advertising, connectedTo, Outdoor Advertising>
+<Print Advertising, partOf, Retargeting Campaigns>
+<Programmatic Advertising, connectedTo, Digital Advertising>
+<Regulatory Compliance for Ads, connectedTo, Ad Placement Optimization>
+<Regulatory Compliance for Ads, connectedTo, Audience Segmentation for Ads>
+<Regulatory Compliance for Ads, connectedTo, Customer Acquisition Cost Analysis>
+<Regulatory Compliance for Ads, connectedTo, Digital Advertising>
+<Regulatory Compliance for Ads, connectedTo, Programmatic Advertising>
+<Regulatory Compliance for Ads, connectedTo, Video Advertising>
+<Regulatory Compliance for Ads, interprets analytics, Outdoor Advertising>
+<Regulatory Compliance for Ads, optimizes campaigns, Outdoor Advertising>
+<Regulatory Compliance for Ads, targets demographics, Ad Creative Development>
+<Television Advertising, connectedTo, Customer Acquisition Cost Analysis>
+<Television Advertising, connectedTo, Regulatory Compliance for Ads>
+<Video Advertising, connectedTo, Audience Segmentation for Ads>
+<Video Advertising, connectedTo, Customer Acquisition Cost Analysis>
diff --git a/test/mermaid/hard/mermaid_191.mmd b/test/mermaid/hard/mermaid_191.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..6515b4660334001e6f61b1368e8a977fff3e5f2d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_191.mmd
@@ -0,0 +1,134 @@
+graph RL
+    N0([start])
+    N1([Campaign Planning])
+    N2[Native Advertising]
+    N3[(Social Media Ads)]
+    N4([Psychographic Targeting])
+    N5([Outdoor Advertising])
+    N6[/Retargeting Campaigns/]
+    N7[/Landing Page Optimization/]
+    N8[/Media Buying/]
+    N9[Ad Copywriting]
+    N10([Regulatory Compliance for Ads])
+    N11(Print Advertising)
+    N12[(Ad Placement Optimization)]
+    N13[Ad Platform Management]
+    N14{Return on Ad Spend Calculation}
+    N15([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Geo_Targeting
+        nest0_0(Audience Segmentation for Ads)
+        nest0_1([Privacy Concerns in Ads])
+        nest0_2[[Video Advertising]]
+    end
+    subgraph Ad Creative Development
+        nest1_0(Visual Design for Ads)
+        nest1_1(Performance Tracking)
+        nest1_2[[Fraud Detection in Ads]]
+    end
+    N0 -.-> |manages budgets| N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> |targets psychographics| N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> |measures ROAS| N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> |creates landing pages| N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 --> N14
+    N14 --> N15
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N6 -.-> nest0_0
+    nest0_2 --> N12
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N11 -.-> nest1_0
+    nest1_2 --> N9
+    N6 -.-> S0
+    S0 --> N10
+    S0 --> N8
+    S0 --> N12
+    N10 --> S1
+    S1 --> N14
+    S1 --> N12
+    N4 -.-> S2
+    S2 --> N11
+    S2 --> N10
+    S2 -.-> N15
+    N4 --> M1
+    N5 --> M1
+    N0 --> M1
+    M1 -.-> N7
+    style N0 fill:#F0F4C3,stroke:#AED581
+    style N1 fill:#FFDCD6,stroke:#FFB2A5
+    style N2 fill:#D1C4E9,stroke:#7E57C2
+    style N3 fill:#D1C4E9,stroke:#7E57C2
+    style N4 fill:#D1C4E9,stroke:#7E57C2
+    style N5 fill:#FFDCD6,stroke:#FFB2A5
+    style N6 fill:#D1C4E9,stroke:#7E57C2
+    style N7 fill:#FFDCD6,stroke:#FFB2A5
+    style N8 fill:#F0F4C3,stroke:#AED581
+    style N9 fill:#F0F4C3,stroke:#AED581
+    style N10 fill:#F0F4C3,stroke:#AED581
+    style N11 fill:#D1C4E9,stroke:#7E57C2
+    style N12 fill:#F0F4C3,stroke:#AED581
+    style N13 fill:#D1C4E9,stroke:#7E57C2
+    style N14 fill:#F0F4C3,stroke:#AED581
+    style N15 fill:#D1C4E9,stroke:#7E57C2
+    style S0 fill:#D1C4E9,stroke:#7E57C2
+    style S1 fill:#D1C4E9,stroke:#7E57C2
+    style S2 fill:#D1C4E9,stroke:#7E57C2
+    style M1 fill:#D1C4E9,stroke:#7E57C2
+    style nest0_0 fill:#F0F4C3,stroke:#AED581
+    style nest0_1 fill:#FFDCD6,stroke:#FFB2A5
+    style nest0_2 fill:#F0F4C3,stroke:#AED581
+    style nest1_0 fill:#D1C4E9,stroke:#7E57C2
+    style nest1_1 fill:#F0F4C3,stroke:#AED581
+    style nest1_2 fill:#FFDCD6,stroke:#FFB2A5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_192.txt b/test/mermaid/hard/mermaid_192.txt
new file mode 100644
index 0000000000000000000000000000000000000000..03b7a0c74aa77a56dd9d8edc92f10151f180dc54
--- /dev/null
+++ b/test/mermaid/hard/mermaid_192.txt
@@ -0,0 +1,37 @@
+<A or B Testing for Ads, connectedTo, Brand Awareness Campaigns>
+<Ad Copywriting, buys media, Visual Design for Ads>
+<Ad Creative Development, connectedTo, Radio Advertising>
+<Ad Network Management, connectedTo, Search Engine Ads>
+<Ad Network Management, connectedTo, Television Advertising>
+<Audience Targeting, connectedTo, Display Advertising>
+<Audience Targeting, partOf, Psychographic Targeting>
+<Brand Awareness Campaigns, connectedTo, Retargeting Campaigns>
+<Budget Management, connectedTo, Audience Targeting>
+<Budget Management, partOf, Psychographic Targeting>
+<Conversion Tracking, connectedTo, A or B Testing for Ads>
+<Conversion Tracking, connectedTo, Fraud Detection in Ads>
+<Conversion Tracking, radio ads, Search Engine Ads>
+<Demographic Targeting, partOf, Media Buying>
+<Demographic Targeting, targets audiences, Brand Awareness Campaigns>
+<Digital Advertising, protects privacy, Ad Copywriting>
+<Display Advertising, connectedTo, Conversion Tracking>
+<Display Advertising, partOf, Psychographic Targeting>
+<Fraud Detection in Ads, connectedTo, Demographic Targeting>
+<Fraud Detection in Ads, partOf, Media Buying>
+<Landing Page Optimization, connectedTo, Ad Creative Development>
+<Native Advertising, connectedTo, Budget Management>
+<Native Advertising, connectedTo, Outdoor Advertising>
+<Outdoor Advertising, connectedTo, Ad Creative Development>
+<Outdoor Advertising, connectedTo, Landing Page Optimization>
+<Outdoor Advertising, search ads, A or B Testing for Ads>
+<Radio Advertising, connectedTo, A or B Testing for Ads>
+<Retargeting Campaigns, connectedTo, Customer Acquisition Cost Analysis>
+<Search Engine Ads, connectedTo, A or B Testing for Ads>
+<Search Engine Ads, connectedTo, Brand Awareness Campaigns>
+<Search Engine Ads, connectedTo, Outdoor Advertising>
+<Search Engine Ads, connectedTo, Video Advertising>
+<Social Media Ads, connectedTo, Digital Advertising>
+<Television Advertising, connectedTo, Conversion Tracking>
+<Television Advertising, connectedTo, Search Engine Ads>
+<Video Advertising, connectedTo, Social Media Ads>
+<Visual Design for Ads, connectedTo, Native Advertising>
diff --git a/test/mermaid/hard/mermaid_193.mmd b/test/mermaid/hard/mermaid_193.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..fe3a0bcb9dda11e00438867c4ec7f04538d9d237
--- /dev/null
+++ b/test/mermaid/hard/mermaid_193.mmd
@@ -0,0 +1,120 @@
+graph TD
+    N0([Supply Chain Traceability])
+    N1[Digital Identity Management]
+    N2[Wallet Management]
+    N3[[Private Blockchain Implementation]]
+    N4[Interoperability Solutions]
+    N5[/Consortium Blockchain Setup/]
+    N6{Real Estate Tokenization}
+    N7[[Decentralized Network Design]]
+    N8(Non_Fungible Token Creation)
+    N9[/Smart Contract Development/]
+    N10[/Initial Coin Offerings/]
+    N11(Cross_Border Payments)
+    N12[(Sharding Implementation)]
+    N13([Sidechains and Layer 2 Solutions])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    subgraph Energy Trading on Blockchain
+        nest0_0([Zero_Knowledge Proofs])
+        nest0_1[/Enterprise Blockchain Solutions/]
+        nest0_2{Public Blockchain Deployment}
+        nest0_3[[Identity Verification on Blockchain]]
+    end
+    subgraph Transaction Verification
+        nest1_0{Governance Models for Blockchains}
+        nest1_1[(Oracles Integration)]
+        nest1_2{Distributed Ledger Technology}
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> |codes smart contracts| N7
+    N7 --> |secures health data| N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    nest0_0 --> nest0_1
+    nest0_1 --> |generates hashes| nest0_2
+    nest0_2 --> nest0_3
+    N11 -.-> |enables voting| nest0_0
+    nest0_3 --> N13
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N2 -.-> nest1_0
+    nest1_2 --> N6
+    N3 --> S0
+    S0 -.-> |deploys solutions| N6
+    S0 -.-> N10
+    S0 -.-> N9
+    N9 --> S1
+    S1 -.-> N12
+    S1 -.-> |creates bridges| N13
+    N0 -.-> M0
+    N3 -.-> M0
+    N6 --> M0
+    M0 --> N8
+    style N0 fill:#E8EAF6,stroke:#7986CB
+    style N1 fill:#FBE9E7,stroke:#FF8A65
+    style N2 fill:#FBE9E7,stroke:#FF8A65
+    style N3 fill:#FCE4EC,stroke:#F06292
+    style N4 fill:#FCE4EC,stroke:#F06292
+    style N5 fill:#FCE4EC,stroke:#F06292
+    style N6 fill:#E8EAF6,stroke:#7986CB
+    style N7 fill:#FCE4EC,stroke:#F06292
+    style N8 fill:#E8EAF6,stroke:#7986CB
+    style N9 fill:#E8EAF6,stroke:#7986CB
+    style N10 fill:#FCE4EC,stroke:#F06292
+    style N11 fill:#FBE9E7,stroke:#FF8A65
+    style N12 fill:#FCE4EC,stroke:#F06292
+    style N13 fill:#E8EAF6,stroke:#7986CB
+    style S0 fill:#FCE4EC,stroke:#F06292
+    style S1 fill:#FBE9E7,stroke:#FF8A65
+    style M0 fill:#E8EAF6,stroke:#7986CB
+    style nest0_0 fill:#FCE4EC,stroke:#F06292
+    style nest0_1 fill:#FCE4EC,stroke:#F06292
+    style nest0_2 fill:#FBE9E7,stroke:#FF8A65
+    style nest0_3 fill:#FBE9E7,stroke:#FF8A65
+    style nest1_0 fill:#E8EAF6,stroke:#7986CB
+    style nest1_1 fill:#E8EAF6,stroke:#7986CB
+    style nest1_2 fill:#E8EAF6,stroke:#7986CB
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FF8A65,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_194.mmd b/test/mermaid/hard/mermaid_194.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..4dd29dcde18e13e7dc6b25bc35d1755563db8bc2
--- /dev/null
+++ b/test/mermaid/hard/mermaid_194.mmd
@@ -0,0 +1,99 @@
+graph BT
+    N0([start])
+    N1{Sharding Implementation}
+    N2([Energy Trading on Blockchain])
+    N3[Cross_Border Payments]
+    N4(Transaction Verification)
+    N5[Cross_Chain Bridges]
+    N6[(Digital Identity Management)]
+    N7(Voting Systems on Blockchain)
+    N8[(Decentralized Finance Protocols)]
+    N9[Governance Models for Blockchains]
+    N10([Supply Chain Traceability])
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Scalability Solutions
+        nest0_0[(Enterprise Blockchain Solutions)]
+        nest0_1[[Security Auditing for Blockchains]]
+        nest0_2[[Oracles Integration]]
+    end
+    subgraph Interoperability Solutions
+        nest1_0[/Identity Verification on Blockchain/]
+        nest1_1([Financial Asset Tokenization])
+        nest1_2[[Decentralized Applications Development]]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> |no| N8
+    N8 --> N9
+    N9 -.-> N10
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N1 --> nest0_0
+    nest0_2 --> N10
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N8 -.-> nest1_0
+    nest1_2 --> N6
+    N6 --> S1
+    S1 -.-> |no| N9
+    S1 --> N8
+    N6 --> |no| M0
+    N3 -.-> M0
+    N1 --> M0
+    N5 --> M0
+    M0 --> N10
+    N3 --> M1
+    N4 --> M1
+    M1 -.-> N9
+    N2 --> |no| M2
+    N6 --> M2
+    N4 --> M2
+    N8 --> M2
+    M2 --> N10
+    style S1 fill:#FAEBF3,stroke:#F7BEE0
+    style M0 fill:#FFDAB9,stroke:#FFC085
+    style M1 fill:#FFDAB9,stroke:#FFC085
+    style M2 fill:#FAEBF3,stroke:#F7BEE0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#26A69A,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_194.txt b/test/mermaid/hard/mermaid_194.txt
new file mode 100644
index 0000000000000000000000000000000000000000..db63cc4119e26e92d3201f5166498a4ef9afea68
--- /dev/null
+++ b/test/mermaid/hard/mermaid_194.txt
@@ -0,0 +1,36 @@
+<Cross_Border Payments, connectedTo, Governance Models for Blockchains>
+<Cross_Border Payments, connectedTo, Supply Chain Traceability>
+<Cross_Border Payments, connectedTo, Transaction Verification>
+<Cross_Chain Bridges, connectedTo, Digital Identity Management>
+<Cross_Chain Bridges, connectedTo, Supply Chain Traceability>
+<Decentralized Applications Development, connectedTo, Digital Identity Management>
+<Decentralized Applications Development, partOf, Interoperability Solutions>
+<Decentralized Finance Protocols, connectedTo, Governance Models for Blockchains>
+<Decentralized Finance Protocols, connectedTo, Identity Verification on Blockchain>
+<Decentralized Finance Protocols, connectedTo, Supply Chain Traceability>
+<Digital Identity Management, connectedTo, Decentralized Finance Protocols>
+<Digital Identity Management, connectedTo, Supply Chain Traceability>
+<Digital Identity Management, connectedTo, Voting Systems on Blockchain>
+<Digital Identity Management, no, Governance Models for Blockchains>
+<Digital Identity Management, no, Supply Chain Traceability>
+<Energy Trading on Blockchain, connectedTo, Cross_Border Payments>
+<Energy Trading on Blockchain, no, Supply Chain Traceability>
+<Enterprise Blockchain Solutions, connectedTo, Security Auditing for Blockchains>
+<Enterprise Blockchain Solutions, partOf, Scalability Solutions>
+<Financial Asset Tokenization, connectedTo, Decentralized Applications Development>
+<Financial Asset Tokenization, partOf, Interoperability Solutions>
+<Governance Models for Blockchains, connectedTo, Supply Chain Traceability>
+<Identity Verification on Blockchain, connectedTo, Financial Asset Tokenization>
+<Identity Verification on Blockchain, partOf, Interoperability Solutions>
+<Oracles Integration, connectedTo, Supply Chain Traceability>
+<Oracles Integration, partOf, Scalability Solutions>
+<Security Auditing for Blockchains, connectedTo, Oracles Integration>
+<Security Auditing for Blockchains, partOf, Scalability Solutions>
+<Sharding Implementation, connectedTo, Energy Trading on Blockchain>
+<Sharding Implementation, connectedTo, Enterprise Blockchain Solutions>
+<Sharding Implementation, connectedTo, Supply Chain Traceability>
+<Transaction Verification, connectedTo, Cross_Chain Bridges>
+<Transaction Verification, connectedTo, Governance Models for Blockchains>
+<Transaction Verification, connectedTo, Supply Chain Traceability>
+<Voting Systems on Blockchain, no, Decentralized Finance Protocols>
+<start, connectedTo, Sharding Implementation>
diff --git a/test/mermaid/hard/mermaid_195.mmd b/test/mermaid/hard/mermaid_195.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..0c81651b66e291e496e62c5729a58ee423efcb46
--- /dev/null
+++ b/test/mermaid/hard/mermaid_195.mmd
@@ -0,0 +1,90 @@
+graph LR
+    N0([Decentralized Network Design])
+    N1[[Energy Trading on Blockchain]]
+    N2[[Zero_Knowledge Proofs]]
+    N3[/Consortium Blockchain Setup/]
+    N4[(Public Blockchain Deployment)]
+    N5[Real Estate Tokenization]
+    N6[Private Blockchain Implementation]
+    S2(( ))
+    M1(( ))
+    subgraph Scalability Solutions
+        nest0_0{Initial Coin Offerings}
+        nest0_1[Mining Operations]
+        nest0_2{Decentralized Applications Development}
+        nest0_3[Enterprise Blockchain Solutions]
+    end
+    subgraph Security Auditing for Blockchains
+        nest1_0[[Intellectual Property Management]]
+        nest1_1{Cross_Border Payments}
+        nest1_2[(Oracles Integration)]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> |creates bridges| N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N2 --> nest0_0
+    nest0_3 --> N1
+    nest1_0 -.-> |launches STOs| nest1_1
+    nest1_1 -.-> nest1_2
+    N3 -.-> |distributes ledgers| nest1_0
+    nest1_2 --> N6
+    N3 -.-> S2
+    S2 --> N5
+    S2 -.-> N6
+    N2 -.-> |governs DAOs| M1
+    N3 --> M1
+    N4 -.-> M1
+    M1 --> N6
+    N0 --> |ensures compliance| nest0_1
+    N2 --> nest0_1
+    N2 -.-> N0
+    N1 -.-> nest0_1
+    style N0 fill:#FFF3E0,stroke:#FFA726
+    style N1 fill:#FFF3E0,stroke:#FFA726
+    style N2 fill:#FFF3E0,stroke:#FFA726
+    style N3 fill:#F0F4C3,stroke:#AED581
+    style N4 fill:#FFF3E0,stroke:#FFA726
+    style N5 fill:#F0F4C3,stroke:#AED581
+    style N6 fill:#F0F4C3,stroke:#AED581
+    style S2 fill:#F0F4C3,stroke:#AED581
+    style M1 fill:#FFF3E0,stroke:#FFA726
+    style nest0_0 fill:#F0F4C3,stroke:#AED581
+    style nest0_1 fill:#FFF3E0,stroke:#FFA726
+    style nest0_2 fill:#FFFCE6,stroke:#FFF9AE
+    style nest0_3 fill:#FFFCE6,stroke:#FFF9AE
+    style nest1_0 fill:#FFFCE6,stroke:#FFF9AE
+    style nest1_1 fill:#F0F4C3,stroke:#AED581
+    style nest1_2 fill:#FFF3E0,stroke:#FFA726
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFF9AE,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_195.txt b/test/mermaid/hard/mermaid_195.txt
new file mode 100644
index 0000000000000000000000000000000000000000..609622badc9d819f19cdf7c47ed277953bc3dfff
--- /dev/null
+++ b/test/mermaid/hard/mermaid_195.txt
@@ -0,0 +1,30 @@
+<Consortium Blockchain Setup, connectedTo, Private Blockchain Implementation>
+<Consortium Blockchain Setup, connectedTo, Public Blockchain Deployment>
+<Consortium Blockchain Setup, connectedTo, Real Estate Tokenization>
+<Consortium Blockchain Setup, distributes ledgers, Intellectual Property Management>
+<Cross_Border Payments, connectedTo, Oracles Integration>
+<Cross_Border Payments, partOf, Security Auditing for Blockchains>
+<Decentralized Applications Development, connectedTo, Enterprise Blockchain Solutions>
+<Decentralized Applications Development, partOf, Scalability Solutions>
+<Decentralized Network Design, connectedTo, Energy Trading on Blockchain>
+<Decentralized Network Design, ensures compliance, Mining Operations>
+<Energy Trading on Blockchain, connectedTo, Mining Operations>
+<Energy Trading on Blockchain, connectedTo, Zero_Knowledge Proofs>
+<Enterprise Blockchain Solutions, connectedTo, Energy Trading on Blockchain>
+<Enterprise Blockchain Solutions, partOf, Scalability Solutions>
+<Initial Coin Offerings, connectedTo, Mining Operations>
+<Initial Coin Offerings, partOf, Scalability Solutions>
+<Intellectual Property Management, launches STOs, Cross_Border Payments>
+<Intellectual Property Management, partOf, Security Auditing for Blockchains>
+<Mining Operations, connectedTo, Decentralized Applications Development>
+<Mining Operations, partOf, Scalability Solutions>
+<Oracles Integration, connectedTo, Private Blockchain Implementation>
+<Oracles Integration, partOf, Security Auditing for Blockchains>
+<Public Blockchain Deployment, connectedTo, Private Blockchain Implementation>
+<Public Blockchain Deployment, connectedTo, Real Estate Tokenization>
+<Real Estate Tokenization, connectedTo, Private Blockchain Implementation>
+<Zero_Knowledge Proofs, connectedTo, Decentralized Network Design>
+<Zero_Knowledge Proofs, connectedTo, Initial Coin Offerings>
+<Zero_Knowledge Proofs, connectedTo, Mining Operations>
+<Zero_Knowledge Proofs, creates bridges, Consortium Blockchain Setup>
+<Zero_Knowledge Proofs, governs DAOs, Private Blockchain Implementation>
diff --git a/test/mermaid/hard/mermaid_196.mmd b/test/mermaid/hard/mermaid_196.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..6c716b75b2472ff30976cb4dedf8a7233b731bcc
--- /dev/null
+++ b/test/mermaid/hard/mermaid_196.mmd
@@ -0,0 +1,150 @@
+graph TD
+    N0([start])
+    N1[GameFi Development]
+    N2[(Community Building)]
+    N3[(Smart Contract Auditing)]
+    N4([Staking])
+    N5[[Security Audits]]
+    N6(Lending and Borrowing Protocols)
+    N7([Market Analysis])
+    N8[Decentralized Exchange Operation]
+    N9[Token Generation Event]
+    N10[Legal Advisory for Crypto]
+    N11[/Cold Storage Solutions/]
+    N12{Fraud Prevention}
+    N13[/KYC or AML Procedures/]
+    N14([Coin Creation])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Hot Wallet Security
+        nest0_0{Blockchain Integration}
+        nest0_1[[Yield Farming]]
+    end
+    subgraph Transaction Processing
+        nest1_0[/Tax Reporting for Crypto/]
+        nest1_1(Custodial Services)
+        nest1_2{Cryptocurrency Education}
+        nest1_3[[Web3 Integration]]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> |custodies assets| N3
+    N3 --> |analyzes markets| N4
+    N4 -.-> |lists assets| N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> |integrates fiat| N14
+    nest0_0 -.-> nest0_1
+    N2 --> nest0_0
+    nest0_1 -.-> N13
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N9 -.-> nest1_0
+    nest1_3 --> N13
+    N4 -.-> S0
+    S0 --> N10
+    S0 --> N14
+    S0 -.-> N9
+    S0 --> N6
+    N6 --> S1
+    S1 -.-> N9
+    S1 --> N10
+    S1 --> N11
+    N6 -.-> S2
+    S2 --> N12
+    S2 --> N14
+    N1 -.-> M0
+    N4 -.-> M0
+    M0 --> N7
+    N0 -.-> M1
+    N3 --> M1
+    M1 --> N7
+    N3 -.-> M2
+    N0 -.-> M2
+    N1 -.-> M2
+    N4 -.-> M2
+    M2 -.-> N6
+    style N0 fill:#FFEBEE,stroke:#E57373
+    style N1 fill:#FFEBEE,stroke:#E57373
+    style N2 fill:#E8EAF6,stroke:#5C6BC0
+    style N3 fill:#ECF0FD,stroke:#B8C0F5
+    style N4 fill:#ECF0FD,stroke:#B8C0F5
+    style N5 fill:#ECF0FD,stroke:#B8C0F5
+    style N6 fill:#E8EAF6,stroke:#5C6BC0
+    style N7 fill:#E8EAF6,stroke:#5C6BC0
+    style N8 fill:#E8EAF6,stroke:#5C6BC0
+    style N9 fill:#FFEBEE,stroke:#E57373
+    style N10 fill:#ECF0FD,stroke:#B8C0F5
+    style N11 fill:#ECF0FD,stroke:#B8C0F5
+    style N12 fill:#ECF0FD,stroke:#B8C0F5
+    style N13 fill:#ECF0FD,stroke:#B8C0F5
+    style N14 fill:#E8EAF6,stroke:#5C6BC0
+    style S0 fill:#E8EAF6,stroke:#5C6BC0
+    style S1 fill:#FFEBEE,stroke:#E57373
+    style S2 fill:#ECF0FD,stroke:#B8C0F5
+    style M0 fill:#FFEBEE,stroke:#E57373
+    style M1 fill:#ECF0FD,stroke:#B8C0F5
+    style M2 fill:#FFEBEE,stroke:#E57373
+    style nest0_0 fill:#ECF0FD,stroke:#B8C0F5
+    style nest0_1 fill:#ECF0FD,stroke:#B8C0F5
+    style nest1_0 fill:#FFEBEE,stroke:#E57373
+    style nest1_1 fill:#ECF0FD,stroke:#B8C0F5
+    style nest1_2 fill:#ECF0FD,stroke:#B8C0F5
+    style nest1_3 fill:#FFEBEE,stroke:#E57373
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 44 stroke:#B8C0F5,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_196.txt b/test/mermaid/hard/mermaid_196.txt
new file mode 100644
index 0000000000000000000000000000000000000000..4a37bb11a83e2da0a8d7d2c38cebff2eac80008a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_196.txt
@@ -0,0 +1,44 @@
+<Blockchain Integration, connectedTo, Yield Farming>
+<Blockchain Integration, partOf, Hot Wallet Security>
+<Cold Storage Solutions, connectedTo, Fraud Prevention>
+<Community Building, connectedTo, Blockchain Integration>
+<Community Building, custodies assets, Smart Contract Auditing>
+<Cryptocurrency Education, connectedTo, Web3 Integration>
+<Cryptocurrency Education, partOf, Transaction Processing>
+<Custodial Services, connectedTo, Cryptocurrency Education>
+<Custodial Services, partOf, Transaction Processing>
+<Decentralized Exchange Operation, connectedTo, Token Generation Event>
+<Fraud Prevention, connectedTo, KYC or AML Procedures>
+<GameFi Development, connectedTo, Community Building>
+<GameFi Development, connectedTo, Lending and Borrowing Protocols>
+<GameFi Development, connectedTo, Market Analysis>
+<KYC or AML Procedures, integrates fiat, Coin Creation>
+<Legal Advisory for Crypto, connectedTo, Cold Storage Solutions>
+<Lending and Borrowing Protocols, connectedTo, Coin Creation>
+<Lending and Borrowing Protocols, connectedTo, Cold Storage Solutions>
+<Lending and Borrowing Protocols, connectedTo, Fraud Prevention>
+<Lending and Borrowing Protocols, connectedTo, Legal Advisory for Crypto>
+<Lending and Borrowing Protocols, connectedTo, Market Analysis>
+<Lending and Borrowing Protocols, connectedTo, Token Generation Event>
+<Market Analysis, connectedTo, Decentralized Exchange Operation>
+<Security Audits, connectedTo, Lending and Borrowing Protocols>
+<Smart Contract Auditing, analyzes markets, Staking>
+<Smart Contract Auditing, connectedTo, Lending and Borrowing Protocols>
+<Smart Contract Auditing, connectedTo, Market Analysis>
+<Staking, connectedTo, Coin Creation>
+<Staking, connectedTo, Legal Advisory for Crypto>
+<Staking, connectedTo, Lending and Borrowing Protocols>
+<Staking, connectedTo, Market Analysis>
+<Staking, connectedTo, Token Generation Event>
+<Staking, lists assets, Security Audits>
+<Tax Reporting for Crypto, connectedTo, Custodial Services>
+<Tax Reporting for Crypto, partOf, Transaction Processing>
+<Token Generation Event, connectedTo, Legal Advisory for Crypto>
+<Token Generation Event, connectedTo, Tax Reporting for Crypto>
+<Web3 Integration, connectedTo, KYC or AML Procedures>
+<Web3 Integration, partOf, Transaction Processing>
+<Yield Farming, connectedTo, KYC or AML Procedures>
+<Yield Farming, partOf, Hot Wallet Security>
+<start, connectedTo, GameFi Development>
+<start, connectedTo, Lending and Borrowing Protocols>
+<start, connectedTo, Market Analysis>
diff --git a/test/mermaid/hard/mermaid_197.txt b/test/mermaid/hard/mermaid_197.txt
new file mode 100644
index 0000000000000000000000000000000000000000..1cece3907896228c61555e34b8051204176a07d2
--- /dev/null
+++ b/test/mermaid/hard/mermaid_197.txt
@@ -0,0 +1,37 @@
+<Blockchain Explorers, connectedTo, Liquidity Provision>
+<Blockchain Explorers, connectedTo, Smart Contract Auditing>
+<Blockchain Explorers, connectedTo, end>
+<Blockchain Explorers, yes, Custodial Services>
+<Coin Creation, connectedTo, Interoperability Solutions>
+<Coin Creation, connectedTo, Portfolio Management>
+<Community Building, connectedTo, Smart Contract Auditing>
+<Community Building, connectedTo, Yield Farming>
+<Custodial Services, connectedTo, Transaction Processing>
+<Fiat On or Off Ramps, connectedTo, Initial Exchange Offering>
+<Fiat On or Off Ramps, partOf, Exchange Listing>
+<Initial Exchange Offering, connectedTo, Lending and Borrowing Protocols>
+<Initial Exchange Offering, partOf, Exchange Listing>
+<Interoperability Solutions, connectedTo, Fiat On or Off Ramps>
+<Interoperability Solutions, partOf, Exchange Listing>
+<KYC or AML Procedures, connectedTo, Community Building>
+<Lending and Borrowing Protocols, connectedTo, Coin Creation>
+<Lending and Borrowing Protocols, connectedTo, Portfolio Management>
+<Lending and Borrowing Protocols, connectedTo, end>
+<Liquidity Provision, connectedTo, Smart Contract Auditing>
+<Portfolio Management, connectedTo, end>
+<Regulatory Compliance, connectedTo, Lending and Borrowing Protocols>
+<Regulatory Compliance, connectedTo, Security Audits>
+<Security Audits, connectedTo, Staking>
+<Security Audits, partOf, Web3 Integration>
+<Smart Contract Auditing, connectedTo, Coin Creation>
+<Smart Contract Auditing, connectedTo, Lending and Borrowing Protocols>
+<Smart Contract Auditing, connectedTo, Portfolio Management>
+<Smart Contract Auditing, connectedTo, Regulatory Compliance>
+<Staking, no, end>
+<Staking, partOf, Web3 Integration>
+<Transaction Processing, connectedTo, Liquidity Provision>
+<Yield Farming, connectedTo, Custodial Services>
+<Yield Farming, no, Blockchain Explorers>
+<start, connectedTo, Custodial Services>
+<start, connectedTo, KYC or AML Procedures>
+<start, connectedTo, Smart Contract Auditing>
diff --git a/test/mermaid/hard/mermaid_198.mmd b/test/mermaid/hard/mermaid_198.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..67c22af9beff6ce25c7bc6902b686bf6ff7a8e4d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_198.mmd
@@ -0,0 +1,109 @@
+graph LR
+    N0([start])
+    N1[/Liquidity Provision/]
+    N2([Wallet Development])
+    N3[Lending and Borrowing Protocols]
+    N4(Transaction Processing)
+    N5([Fraud Prevention])
+    N6[[KYC or AML Procedures]]
+    N7[Exchange Listing]
+    N8[(Legal Advisory for Crypto)]
+    N9[/Smart Contract Auditing/]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Hot Wallet Security
+        nest0_0(Fiat On or Off Ramps)
+        nest0_1([Blockchain Integration])
+        nest0_2([Airdrop Campaigns])
+        nest0_3[Decentralized Autonomous Organizations]
+    end
+    subgraph NFT Marketplace Development
+        nest1_0[/Initial Exchange Offering/]
+        nest1_1(Web3 Integration)
+        nest1_2([Blockchain Explorers])
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N7 --> |no| nest0_0
+    nest0_3 --> N7
+    nest1_0 -.-> nest1_1
+    nest1_1 --> |yes| nest1_2
+    N6 --> nest1_0
+    nest1_2 --> N4
+    N6 --> S0
+    S0 --> N9
+    S0 -.-> N8
+    N5 --> S1
+    S1 -.-> N8
+    S1 -.-> N9
+    S1 -.-> N7
+    N4 -.-> S2
+    S2 --> N8
+    S2 --> N7
+    S2 --> N6
+    N5 -.-> M0
+    N1 -.-> M0
+    N4 --> M0
+    N0 -.-> M0
+    M0 -.-> N9
+    N1 -.-> M1
+    N0 --> M1
+    N2 --> M1
+    M1 --> N4
+    style S0 fill:#D1C4E9,stroke:#673AB7
+    style S1 fill:#D1C4E9,stroke:#673AB7
+    style S2 fill:#FCFCE7,stroke:#DCE775
+    style M0 fill:#F9FBE7,stroke:#C0CA33
+    style M1 fill:#F9FBE7,stroke:#C0CA33
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#673AB7,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_198.txt b/test/mermaid/hard/mermaid_198.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6b95895f792ec4ddabc9bc68248023ef9b77e3af
--- /dev/null
+++ b/test/mermaid/hard/mermaid_198.txt
@@ -0,0 +1,39 @@
+<Airdrop Campaigns, connectedTo, Decentralized Autonomous Organizations>
+<Airdrop Campaigns, partOf, Hot Wallet Security>
+<Blockchain Explorers, connectedTo, Transaction Processing>
+<Blockchain Explorers, partOf, NFT Marketplace Development>
+<Blockchain Integration, connectedTo, Airdrop Campaigns>
+<Blockchain Integration, partOf, Hot Wallet Security>
+<Decentralized Autonomous Organizations, connectedTo, Exchange Listing>
+<Decentralized Autonomous Organizations, partOf, Hot Wallet Security>
+<Exchange Listing, connectedTo, Legal Advisory for Crypto>
+<Exchange Listing, no, Fiat On or Off Ramps>
+<Fiat On or Off Ramps, connectedTo, Blockchain Integration>
+<Fiat On or Off Ramps, partOf, Hot Wallet Security>
+<Fraud Prevention, connectedTo, Exchange Listing>
+<Fraud Prevention, connectedTo, KYC or AML Procedures>
+<Fraud Prevention, connectedTo, Legal Advisory for Crypto>
+<Fraud Prevention, connectedTo, Smart Contract Auditing>
+<Initial Exchange Offering, connectedTo, Web3 Integration>
+<Initial Exchange Offering, partOf, NFT Marketplace Development>
+<KYC or AML Procedures, connectedTo, Exchange Listing>
+<KYC or AML Procedures, connectedTo, Initial Exchange Offering>
+<KYC or AML Procedures, connectedTo, Legal Advisory for Crypto>
+<KYC or AML Procedures, connectedTo, Smart Contract Auditing>
+<Legal Advisory for Crypto, connectedTo, Smart Contract Auditing>
+<Lending and Borrowing Protocols, connectedTo, Transaction Processing>
+<Liquidity Provision, connectedTo, Smart Contract Auditing>
+<Liquidity Provision, connectedTo, Transaction Processing>
+<Liquidity Provision, connectedTo, Wallet Development>
+<Transaction Processing, connectedTo, Exchange Listing>
+<Transaction Processing, connectedTo, Fraud Prevention>
+<Transaction Processing, connectedTo, KYC or AML Procedures>
+<Transaction Processing, connectedTo, Legal Advisory for Crypto>
+<Transaction Processing, connectedTo, Smart Contract Auditing>
+<Wallet Development, connectedTo, Lending and Borrowing Protocols>
+<Wallet Development, connectedTo, Transaction Processing>
+<Web3 Integration, partOf, NFT Marketplace Development>
+<Web3 Integration, yes, Blockchain Explorers>
+<start, connectedTo, Liquidity Provision>
+<start, connectedTo, Smart Contract Auditing>
+<start, connectedTo, Transaction Processing>
diff --git a/test/mermaid/hard/mermaid_199.mmd b/test/mermaid/hard/mermaid_199.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..61124ba0c6d1408629fe91a1b0fdef5a78949dd9
--- /dev/null
+++ b/test/mermaid/hard/mermaid_199.mmd
@@ -0,0 +1,102 @@
+graph BT
+    N0([start])
+    N1{Product Development Lifecycle}
+    N2[International Crowdfunding]
+    N3{Securities Regulations Adherence}
+    N4[Legal Compliance]
+    N5[/Email List Building/]
+    N6(Equity Crowdfunding)
+    N7[/Post_Campaign Updates/]
+    N8[Success Fee Structures]
+    N9(Fulfillment Planning)
+    N10{Post_Campaign Reporting}
+    N11[/Donation_Based Crowdfunding/]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Debt Crowdfunding
+        nest0_0[Escrow Management]
+        nest0_1[Tax Implications of Crowdfunding]
+        nest0_2[[Real Estate Crowdfunding]]
+    end
+    subgraph Project Vetting
+        nest1_0[(Intellectual Property Protection)]
+        nest1_1[(Manufacturing Planning)]
+        nest1_2(Investor Relations)
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> |no| N9
+    N9 -.-> N10
+    N10 --> N11
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N8 -.-> nest0_0
+    nest0_2 --> N3
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N7 -.-> nest1_0
+    nest1_2 --> N7
+    N1 --> S0
+    S0 -.-> N9
+    S0 -.-> N3
+    N4 -.-> S1
+    S1 -.-> N6
+    S1 -.-> N7
+    S1 -.-> N10
+    S1 -.-> N8
+    N0 -.-> M0
+    N1 -.-> M0
+    M0 -.-> N7
+    N0 -.-> M1
+    N3 --> M1
+    N2 --> M1
+    N1 --> M1
+    M1 --> N5
+    style S0 fill:#FFDAB9,stroke:#FFC085
+    style S1 fill:#DACBE3,stroke:#A188D0
+    style M0 fill:#E0F7FA,stroke:#00BCD4
+    style M1 fill:#E0F7FA,stroke:#00BCD4
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_2.mmd b/test/mermaid/hard/mermaid_2.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..93ef608b01641604a71428d2cca5af08ba89758d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_2.mmd
@@ -0,0 +1,140 @@
+graph RL
+    N0([Debt Collection])
+    N1[/Treasury Management/]
+    N2([Collateral Evaluation])
+    N3[AML Screening]
+    N4[Venture Capital Funding]
+    N5[/Forex Trading/]
+    N6(Income Verification)
+    N7([KYC Validation])
+    N8[Risk Assessment]
+    N9[Fraud Check]
+    N10[Underwriting]
+    N11(Approval Decision)
+    N12[[Investment Planning]]
+    N13[/Fund Disbursement/]
+    N14{Budgeting Analysis}
+    N15([Dispute Resolution])
+    N16([end])
+    S0(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Compliance Review
+        nest0_0[/Wealth Management/]
+        nest0_1[IPO Launch]
+        nest0_2[(Credit Scoring)]
+        nest0_3[/Loan Processing/]
+    end
+    subgraph Financial Reporting
+        nest1_0(Market Analysis)
+        nest1_1(Transaction Logging)
+        nest1_2[Mortgage Application]
+        nest1_3{Financial Advisory}
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> |adjudicates| N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 -.-> |funds| N13
+    N13 -.-> N14
+    N14 -.-> N15
+    N15 --> N16
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N10 -.-> nest0_0
+    nest0_3 -.-> N5
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N9 -.-> nest1_0
+    nest1_3 -.-> N14
+    N5 --> S0
+    S0 -.-> N10
+    S0 -.-> N14
+    N5 -.-> S2
+    S2 -.-> N11
+    S2 --> N14
+    N1 --> M0
+    N2 -.-> M0
+    M0 --> N15
+    N6 --> M1
+    N4 --> |underwrites| M1
+    M1 --> N8
+    style N0 fill:#D3F7F9,stroke:#80DDEA
+    style N1 fill:#E0F7FA,stroke:#00BCD4
+    style N2 fill:#E0F7FA,stroke:#00BCD4
+    style N3 fill:#FFDCD6,stroke:#FFB2A5
+    style N4 fill:#E0F7FA,stroke:#00BCD4
+    style N5 fill:#FFDCD6,stroke:#FFB2A5
+    style N6 fill:#FFDCD6,stroke:#FFB2A5
+    style N7 fill:#D3F7F9,stroke:#80DDEA
+    style N8 fill:#FFDCD6,stroke:#FFB2A5
+    style N9 fill:#E0F7FA,stroke:#00BCD4
+    style N10 fill:#D3F7F9,stroke:#80DDEA
+    style N11 fill:#E0F7FA,stroke:#00BCD4
+    style N12 fill:#D3F7F9,stroke:#80DDEA
+    style N13 fill:#FFDCD6,stroke:#FFB2A5
+    style N14 fill:#E0F7FA,stroke:#00BCD4
+    style N15 fill:#FFDCD6,stroke:#FFB2A5
+    style N16 fill:#D3F7F9,stroke:#80DDEA
+    style S0 fill:#E0F7FA,stroke:#00BCD4
+    style S2 fill:#E0F7FA,stroke:#00BCD4
+    style M0 fill:#FFDCD6,stroke:#FFB2A5
+    style M1 fill:#FFDCD6,stroke:#FFB2A5
+    style nest0_0 fill:#D3F7F9,stroke:#80DDEA
+    style nest0_1 fill:#E0F7FA,stroke:#00BCD4
+    style nest0_2 fill:#D3F7F9,stroke:#80DDEA
+    style nest0_3 fill:#FFDCD6,stroke:#FFB2A5
+    style nest1_0 fill:#D3F7F9,stroke:#80DDEA
+    style nest1_1 fill:#FFDCD6,stroke:#FFB2A5
+    style nest1_2 fill:#D3F7F9,stroke:#80DDEA
+    style nest1_3 fill:#FFDCD6,stroke:#FFB2A5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFB2A5,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_2.txt b/test/mermaid/hard/mermaid_2.txt
new file mode 100644
index 0000000000000000000000000000000000000000..eccf4270775866826712d3c381ce56696737d473
--- /dev/null
+++ b/test/mermaid/hard/mermaid_2.txt
@@ -0,0 +1,41 @@
+<AML Screening, connectedTo, Venture Capital Funding>
+<Approval Decision, connectedTo, Investment Planning>
+<Budgeting Analysis, connectedTo, Dispute Resolution>
+<Collateral Evaluation, connectedTo, AML Screening>
+<Collateral Evaluation, connectedTo, Dispute Resolution>
+<Credit Scoring, connectedTo, Loan Processing>
+<Credit Scoring, partOf, Compliance Review>
+<Debt Collection, connectedTo, Treasury Management>
+<Dispute Resolution, connectedTo, end>
+<Financial Advisory, connectedTo, Budgeting Analysis>
+<Financial Advisory, partOf, Financial Reporting>
+<Forex Trading, connectedTo, Approval Decision>
+<Forex Trading, connectedTo, Budgeting Analysis>
+<Forex Trading, connectedTo, Income Verification>
+<Forex Trading, connectedTo, Underwriting>
+<Fraud Check, connectedTo, Market Analysis>
+<Fraud Check, connectedTo, Underwriting>
+<Fund Disbursement, connectedTo, Budgeting Analysis>
+<IPO Launch, connectedTo, Credit Scoring>
+<IPO Launch, partOf, Compliance Review>
+<Income Verification, connectedTo, KYC Validation>
+<Income Verification, connectedTo, Risk Assessment>
+<Investment Planning, funds, Fund Disbursement>
+<KYC Validation, connectedTo, Risk Assessment>
+<Loan Processing, connectedTo, Forex Trading>
+<Loan Processing, partOf, Compliance Review>
+<Market Analysis, connectedTo, Transaction Logging>
+<Market Analysis, partOf, Financial Reporting>
+<Mortgage Application, connectedTo, Financial Advisory>
+<Mortgage Application, partOf, Financial Reporting>
+<Risk Assessment, connectedTo, Fraud Check>
+<Transaction Logging, connectedTo, Mortgage Application>
+<Transaction Logging, partOf, Financial Reporting>
+<Treasury Management, connectedTo, Collateral Evaluation>
+<Treasury Management, connectedTo, Dispute Resolution>
+<Underwriting, connectedTo, Approval Decision>
+<Underwriting, connectedTo, Wealth Management>
+<Venture Capital Funding, adjudicates, Forex Trading>
+<Venture Capital Funding, underwrites, Risk Assessment>
+<Wealth Management, connectedTo, IPO Launch>
+<Wealth Management, partOf, Compliance Review>
diff --git a/test/mermaid/hard/mermaid_20.mmd b/test/mermaid/hard/mermaid_20.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..0858e73165560ebf58300a3722d8162bf3b1d547
--- /dev/null
+++ b/test/mermaid/hard/mermaid_20.mmd
@@ -0,0 +1,116 @@
+graph TD
+    N0([start])
+    N1[(Fuel Delivery)]
+    N2[[Renewable Integration]]
+    N3{Wind Turbine Monitoring}
+    N4{Power Plant}
+    N5[Energy Storage]
+    N6[/Cybersecurity for Grid/]
+    N7[(Transformer Station)]
+    N8[/Solar Panel Installation/]
+    N9[Energy Efficiency Audit]
+    N10[[Demand Forecast]]
+    N11[(Voltage Regulation)]
+    N12[/Nuclear Reactor Control/]
+    N13[[Geothermal Power]]
+    N14[/Sensor Reading/]
+    N15([end])
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Grid Modernization
+        nest0_0(Pipeline Monitoring)
+        nest0_1([Energy Infrastructure Planning])
+        nest0_2([Oil and Gas Exploration])
+        nest0_3[Battery Monitoring]
+    end
+    subgraph Peak Shaving
+        nest1_0{Alert Dispatch}
+        nest1_1[[Consumption Logging]]
+    end
+    N0 -.-> |no| N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> |no| N5
+    N5 -.-> N6
+    N6 -.-> |yes| N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> |yes| N13
+    N13 --> N14
+    N14 --> N15
+    nest0_0 --> nest0_1
+    nest0_1 --> |yes| nest0_2
+    nest0_2 --> nest0_3
+    N11 --> nest0_0
+    nest0_3 --> N7
+    nest1_0 --> nest1_1
+    N1 -.-> nest1_0
+    nest1_1 -.-> N3
+    N2 -.-> S1
+    S1 -.-> N4
+    S1 --> N9
+    S1 --> N11
+    S1 --> |no| N7
+    N8 -.-> M0
+    N6 -.-> M0
+    N12 --> M0
+    M0 -.-> N15
+    N0 -.-> M1
+    N2 -.-> M1
+    N3 -.-> |no| M1
+    M1 -.-> N6
+    N8 -.-> M2
+    N1 --> M2
+    N4 -.-> M2
+    M2 -.-> N10
+    style S1 fill:#ECF0FD,stroke:#B8C0F5
+    style M0 fill:#FFF0CC,stroke:#FFCC80
+    style M1 fill:#FFF0CC,stroke:#FFCC80
+    style M2 fill:#FFF0CC,stroke:#FFCC80
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#A2D0FF,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_20.txt b/test/mermaid/hard/mermaid_20.txt
new file mode 100644
index 0000000000000000000000000000000000000000..69381eaccad516b8b12dd93f1cc5627f2817abee
--- /dev/null
+++ b/test/mermaid/hard/mermaid_20.txt
@@ -0,0 +1,42 @@
+<Alert Dispatch, connectedTo, Consumption Logging>
+<Alert Dispatch, partOf, Peak Shaving>
+<Battery Monitoring, connectedTo, Transformer Station>
+<Battery Monitoring, partOf, Grid Modernization>
+<Consumption Logging, connectedTo, Wind Turbine Monitoring>
+<Consumption Logging, partOf, Peak Shaving>
+<Cybersecurity for Grid, connectedTo, end>
+<Cybersecurity for Grid, yes, Transformer Station>
+<Demand Forecast, connectedTo, Voltage Regulation>
+<Energy Efficiency Audit, connectedTo, Demand Forecast>
+<Energy Infrastructure Planning, partOf, Grid Modernization>
+<Energy Infrastructure Planning, yes, Oil and Gas Exploration>
+<Energy Storage, connectedTo, Cybersecurity for Grid>
+<Fuel Delivery, connectedTo, Alert Dispatch>
+<Fuel Delivery, connectedTo, Demand Forecast>
+<Fuel Delivery, connectedTo, Renewable Integration>
+<Geothermal Power, connectedTo, Sensor Reading>
+<Nuclear Reactor Control, connectedTo, end>
+<Nuclear Reactor Control, yes, Geothermal Power>
+<Oil and Gas Exploration, connectedTo, Battery Monitoring>
+<Oil and Gas Exploration, partOf, Grid Modernization>
+<Pipeline Monitoring, connectedTo, Energy Infrastructure Planning>
+<Pipeline Monitoring, partOf, Grid Modernization>
+<Power Plant, connectedTo, Demand Forecast>
+<Power Plant, no, Energy Storage>
+<Renewable Integration, connectedTo, Cybersecurity for Grid>
+<Renewable Integration, connectedTo, Energy Efficiency Audit>
+<Renewable Integration, connectedTo, Power Plant>
+<Renewable Integration, connectedTo, Voltage Regulation>
+<Renewable Integration, connectedTo, Wind Turbine Monitoring>
+<Renewable Integration, no, Transformer Station>
+<Sensor Reading, connectedTo, end>
+<Solar Panel Installation, connectedTo, Demand Forecast>
+<Solar Panel Installation, connectedTo, Energy Efficiency Audit>
+<Solar Panel Installation, connectedTo, end>
+<Transformer Station, connectedTo, Solar Panel Installation>
+<Voltage Regulation, connectedTo, Nuclear Reactor Control>
+<Voltage Regulation, connectedTo, Pipeline Monitoring>
+<Wind Turbine Monitoring, connectedTo, Power Plant>
+<Wind Turbine Monitoring, no, Cybersecurity for Grid>
+<start, connectedTo, Cybersecurity for Grid>
+<start, no, Fuel Delivery>
diff --git a/test/mermaid/hard/mermaid_200.txt b/test/mermaid/hard/mermaid_200.txt
new file mode 100644
index 0000000000000000000000000000000000000000..139634528e8302c9e6678dfa4202db5e9e7ee919
--- /dev/null
+++ b/test/mermaid/hard/mermaid_200.txt
@@ -0,0 +1,34 @@
+<Backer Communication, connectedTo, Financial Projection Analysis>
+<Backer Communication, connectedTo, Logistics for Rewards>
+<Backer Communication, no, Post_Campaign Reporting>
+<Customer Support for Backers, connectedTo, Backer Communication>
+<Customer Support for Backers, connectedTo, Post_Campaign Reporting>
+<Due Diligence for Projects, yes, Success Fee Structures>
+<Financial Projection Analysis, connectedTo, Post_Campaign Reporting>
+<Fulfillment Planning, connectedTo, Shareholder Management>
+<Fulfillment Planning, partOf, Intellectual Property Protection>
+<Logistics for Rewards, connectedTo, Post_Campaign Updates>
+<Logistics for Rewards, partOf, Securities Regulations Adherence>
+<Platform Fee Management, connectedTo, Customer Support for Backers>
+<Platform Fee Management, connectedTo, Due Diligence for Projects>
+<Platform Fee Management, connectedTo, Success Fee Structures>
+<Post_Campaign Reporting, connectedTo, Due Diligence for Projects>
+<Post_Campaign Reporting, connectedTo, Platform Selection>
+<Post_Campaign Reporting, connectedTo, Project Vetting>
+<Post_Campaign Reporting, connectedTo, Success Fee Structures>
+<Post_Campaign Updates, connectedTo, Financial Projection Analysis>
+<Post_Campaign Updates, partOf, Securities Regulations Adherence>
+<Project Vetting, connectedTo, Due Diligence for Projects>
+<Project Vetting, connectedTo, Platform Selection>
+<Project Vetting, connectedTo, Success Fee Structures>
+<Shareholder Management, connectedTo, Financial Projection Analysis>
+<Shareholder Management, partOf, Intellectual Property Protection>
+<Success Fee Structures, connectedTo, Fulfillment Planning>
+<Success Fee Structures, connectedTo, Platform Selection>
+<start, connectedTo, Customer Support for Backers>
+<start, connectedTo, Platform Fee Management>
+<start, connectedTo, Post_Campaign Reporting>
+<start, connectedTo, Project Vetting>
+<start, connectedTo, Success Fee Structures>
+<start, no, Post_Campaign Reporting>
+<start, yes, Financial Projection Analysis>
diff --git a/test/mermaid/hard/mermaid_202.mmd b/test/mermaid/hard/mermaid_202.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..ce7e7f3b12533dbf3b3e827c8356b12043c78783
--- /dev/null
+++ b/test/mermaid/hard/mermaid_202.mmd
@@ -0,0 +1,117 @@
+graph TD
+    N0([start])
+    N1(Data Processing at Edge)
+    N2{Device Prototyping}
+    N3(Security Implementation)
+    N4(Cloud Platform Integration)
+    N5[(Asset Tracking)]
+    N6[(Smart City Sensors)]
+    N7[(Remote Monitoring and Control)]
+    N8[Sensor Integration]
+    N9(IoT Device Certification)
+    N10([Edge Computing for IoT])
+    N11[(Interoperability Standards)]
+    N12[Device Management]
+    N13[(Healthcare IoT Devices)]
+    N14([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Compliance with IoT Regulations
+        nest0_0(Environmental Monitoring)
+        nest0_1(Network Protocol Selection)
+        nest0_2(Connectivity Management)
+    end
+    subgraph Supply Chain Optimization
+        nest1_0[Blockchain for IoT Security]
+        nest1_1(Transportation IoT)
+        nest1_2[[Gateway Development]]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 -.-> |no| N11
+    N11 -.-> |no| N12
+    N12 --> |yes| N13
+    N13 -.-> N14
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N1 -.-> nest0_0
+    nest0_2 --> N1
+    nest1_0 -.-> nest1_1
+    nest1_1 --> |no| nest1_2
+    N6 -.-> nest1_0
+    nest1_2 --> N7
+    N2 --> S0
+    S0 -.-> N10
+    S0 --> N4
+    S0 -.-> N5
+    N6 -.-> S1
+    S1 --> N13
+    S1 -.-> N14
+    S1 --> N10
+    N0 -.-> M0
+    N4 --> M0
+    M0 --> N7
+    N7 -.-> M1
+    N0 -.-> M1
+    M1 --> N9
+    N5 -.-> M2
+    N2 -.-> |yes| M2
+    N7 --> M2
+    M2 -.-> N9
+    style S0 fill:#FFFDE7,stroke:#FFF176
+    style S1 fill:#E8F0EA,stroke:#92C79A
+    style M0 fill:#FFFDE7,stroke:#FFF176
+    style M1 fill:#F9FBE7,stroke:#DCE775
+    style M2 fill:#E8F0EA,stroke:#92C79A
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#DCE775,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_202.txt b/test/mermaid/hard/mermaid_202.txt
new file mode 100644
index 0000000000000000000000000000000000000000..5e2c342b1d7f661f472c104c7ddd277410379470
--- /dev/null
+++ b/test/mermaid/hard/mermaid_202.txt
@@ -0,0 +1,40 @@
+<Asset Tracking, connectedTo, IoT Device Certification>
+<Asset Tracking, connectedTo, Smart City Sensors>
+<Blockchain for IoT Security, connectedTo, Transportation IoT>
+<Blockchain for IoT Security, partOf, Supply Chain Optimization>
+<Cloud Platform Integration, connectedTo, Asset Tracking>
+<Cloud Platform Integration, connectedTo, Remote Monitoring and Control>
+<Connectivity Management, connectedTo, Data Processing at Edge>
+<Connectivity Management, partOf, Compliance with IoT Regulations>
+<Data Processing at Edge, connectedTo, Device Prototyping>
+<Data Processing at Edge, connectedTo, Environmental Monitoring>
+<Device Management, yes, Healthcare IoT Devices>
+<Device Prototyping, connectedTo, Asset Tracking>
+<Device Prototyping, connectedTo, Cloud Platform Integration>
+<Device Prototyping, connectedTo, Edge Computing for IoT>
+<Device Prototyping, connectedTo, Security Implementation>
+<Device Prototyping, yes, IoT Device Certification>
+<Edge Computing for IoT, no, Interoperability Standards>
+<Environmental Monitoring, connectedTo, Network Protocol Selection>
+<Environmental Monitoring, partOf, Compliance with IoT Regulations>
+<Gateway Development, connectedTo, Remote Monitoring and Control>
+<Gateway Development, partOf, Supply Chain Optimization>
+<Healthcare IoT Devices, connectedTo, end>
+<Interoperability Standards, no, Device Management>
+<IoT Device Certification, connectedTo, Edge Computing for IoT>
+<Network Protocol Selection, connectedTo, Connectivity Management>
+<Network Protocol Selection, partOf, Compliance with IoT Regulations>
+<Remote Monitoring and Control, connectedTo, IoT Device Certification>
+<Remote Monitoring and Control, connectedTo, Sensor Integration>
+<Security Implementation, connectedTo, Cloud Platform Integration>
+<Sensor Integration, connectedTo, IoT Device Certification>
+<Smart City Sensors, connectedTo, Blockchain for IoT Security>
+<Smart City Sensors, connectedTo, Edge Computing for IoT>
+<Smart City Sensors, connectedTo, Healthcare IoT Devices>
+<Smart City Sensors, connectedTo, Remote Monitoring and Control>
+<Smart City Sensors, connectedTo, end>
+<Transportation IoT, no, Gateway Development>
+<Transportation IoT, partOf, Supply Chain Optimization>
+<start, connectedTo, Data Processing at Edge>
+<start, connectedTo, IoT Device Certification>
+<start, connectedTo, Remote Monitoring and Control>
diff --git a/test/mermaid/hard/mermaid_205.mmd b/test/mermaid/hard/mermaid_205.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..fa0b858425356672f2d51ae2cb0784d07812a18e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_205.mmd
@@ -0,0 +1,136 @@
+graph TD
+    N0([Local AI or ML Inference])
+    N1[(Latency Reduction)]
+    N2[[Edge Application Development]]
+    N3[[Edge Data Processing]]
+    N4(Telecom Edge Computing)
+    N5[/Connectivity to Cloud/]
+    N6[[Sensor Data Aggregation]]
+    N7[/Edge Device Deployment/]
+    N8[Edge Network Topology Design]
+    N9([Fault Tolerance at Edge])
+    N10[(Remote Device Management)]
+    N11(Healthcare Edge Computing)
+    N12(Event_Driven Architectures at Edge)
+    N13([Edge_to_Cloud Data Transfer Optimization])
+    N14([Real_time Analytics at Edge])
+    N15[[Data Synchronization between Edge and Cloud]]
+    N16{Distributed Data Storage}
+    N17[Virtualization at Edge]
+    N18([Edge API Management])
+    N19([Containerization at Edge])
+    N20([Bandwidth Optimization])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    subgraph Power Consumption Optimization
+        nest0_0[Edge Device Analytics]
+        nest0_1[Security for Edge Devices]
+    end
+    subgraph Compliance and Governance at Edge
+        nest1_0[Fleet Management for Edge Devices]
+        nest1_1[Retail Edge Computing]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 --> N14
+    N14 -.-> N15
+    N15 --> N16
+    N16 -.-> N17
+    N17 -.-> N18
+    N18 -.-> N19
+    N19 -.-> N20
+    nest0_0 -.-> nest0_1
+    N4 --> nest0_0
+    nest0_1 -.-> N17
+    nest1_0 -.-> nest1_1
+    N14 --> nest1_0
+    nest1_1 -.-> N12
+    N12 --> S0
+    S0 -.-> N17
+    S0 --> N16
+    S0 --> N14
+    N13 --> S1
+    S1 --> N18
+    S1 -.-> N17
+    N10 --> M0
+    N7 --> M0
+    N3 -.-> M0
+    M0 --> N17
+    style N0 fill:#DDCEDD,stroke:#AF56A6
+    style N1 fill:#DDCEDD,stroke:#AF56A6
+    style N2 fill:#E8EAF6,stroke:#5C6BC0
+    style N3 fill:#DED7F0,stroke:#A188DB
+    style N4 fill:#DED7F0,stroke:#A188DB
+    style N5 fill:#E8EAF6,stroke:#5C6BC0
+    style N6 fill:#DED7F0,stroke:#A188DB
+    style N7 fill:#DED7F0,stroke:#A188DB
+    style N8 fill:#DDCEDD,stroke:#AF56A6
+    style N9 fill:#E8EAF6,stroke:#5C6BC0
+    style N10 fill:#E8EAF6,stroke:#5C6BC0
+    style N11 fill:#DED7F0,stroke:#A188DB
+    style N12 fill:#DED7F0,stroke:#A188DB
+    style N13 fill:#DED7F0,stroke:#A188DB
+    style N14 fill:#E8EAF6,stroke:#5C6BC0
+    style N15 fill:#E8EAF6,stroke:#5C6BC0
+    style N16 fill:#E8EAF6,stroke:#5C6BC0
+    style N17 fill:#DDCEDD,stroke:#AF56A6
+    style N18 fill:#E8EAF6,stroke:#5C6BC0
+    style N19 fill:#DED7F0,stroke:#A188DB
+    style N20 fill:#DDCEDD,stroke:#AF56A6
+    style S0 fill:#DED7F0,stroke:#A188DB
+    style S1 fill:#DED7F0,stroke:#A188DB
+    style M0 fill:#DED7F0,stroke:#A188DB
+    style nest0_0 fill:#DED7F0,stroke:#A188DB
+    style nest0_1 fill:#DED7F0,stroke:#A188DB
+    style nest1_0 fill:#DDCEDD,stroke:#AF56A6
+    style nest1_1 fill:#DED7F0,stroke:#A188DB
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#A188DB,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_206.mmd b/test/mermaid/hard/mermaid_206.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..b0ecbe33843a515e9893a605ca2515c2eadcea0f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_206.mmd
@@ -0,0 +1,144 @@
+graph TD
+    N0([Edge Device Analytics])
+    N1[Power Consumption Optimization]
+    N2[/Fault Tolerance at Edge/]
+    N3[Security for Edge Devices]
+    N4[Data Synchronization between Edge and Cloud]
+    N5(Compliance and Governance at Edge)
+    N6(Resource Management at Edge)
+    N7[Edge API Management]
+    N8(Healthcare Edge Computing)
+    N9[/Local AI or ML Inference/]
+    N10[Event_Driven Architectures at Edge]
+    N11(Containerization at Edge)
+    N12[Latency Reduction]
+    N13[Edge Gateway Management]
+    N14[Distributed Data Storage]
+    N15[Edge AI Model Deployment]
+    N16[Real_time Analytics at Edge]
+    N17([Virtualization at Edge])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Smart City Edge Solutions
+        nest0_0[Remote Device Management]
+        nest0_1(Industrial Edge Computing)
+        nest0_2{Telecom Edge Computing}
+        nest0_3(Edge_to_Cloud Data Transfer Optimization)
+    end
+    subgraph Fleet Management for Edge Devices
+        nest1_0[(Orchestration of Edge Workloads)]
+        nest1_1[[Microservices on Edge Devices]]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> |distributes workloads| N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 -.-> N16
+    N16 -.-> N17
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N16 --> nest0_0
+    nest0_3 --> N11
+    nest1_0 -.-> nest1_1
+    N15 --> nest1_0
+    nest1_1 -.-> N15
+    N13 --> S0
+    S0 --> N16
+    S0 -.-> N17
+    S0 --> N15
+    N10 -.-> S1
+    S1 --> N12
+    S1 --> N13
+    N0 -.-> M0
+    N2 -.-> M0
+    N12 -.-> M0
+    N10 --> M0
+    M0 -.-> N14
+    N1 -.-> M1
+    N0 --> M1
+    N2 -.-> M1
+    M1 --> N4
+    style N0 fill:#C2E8E6,stroke:#61CAC3
+    style N1 fill:#FBE9E7,stroke:#FF8A65
+    style N2 fill:#FFEBEB,stroke:#FFC2C2
+    style N3 fill:#C2E8E6,stroke:#61CAC3
+    style N4 fill:#FFEBEB,stroke:#FFC2C2
+    style N5 fill:#FFEBEB,stroke:#FFC2C2
+    style N6 fill:#C2E8E6,stroke:#61CAC3
+    style N7 fill:#FBE9E7,stroke:#FF8A65
+    style N8 fill:#FFEBEB,stroke:#FFC2C2
+    style N9 fill:#C2E8E6,stroke:#61CAC3
+    style N10 fill:#FFEBEB,stroke:#FFC2C2
+    style N11 fill:#C2E8E6,stroke:#61CAC3
+    style N12 fill:#FFEBEB,stroke:#FFC2C2
+    style N13 fill:#FFEBEB,stroke:#FFC2C2
+    style N14 fill:#C2E8E6,stroke:#61CAC3
+    style N15 fill:#FBE9E7,stroke:#FF8A65
+    style N16 fill:#FFEBEB,stroke:#FFC2C2
+    style N17 fill:#FBE9E7,stroke:#FF8A65
+    style S0 fill:#C2E8E6,stroke:#61CAC3
+    style S1 fill:#FBE9E7,stroke:#FF8A65
+    style M0 fill:#C2E8E6,stroke:#61CAC3
+    style M1 fill:#FBE9E7,stroke:#FF8A65
+    style nest0_0 fill:#FFEBEB,stroke:#FFC2C2
+    style nest0_1 fill:#FFEBEB,stroke:#FFC2C2
+    style nest0_2 fill:#FFEBEB,stroke:#FFC2C2
+    style nest0_3 fill:#C2E8E6,stroke:#61CAC3
+    style nest1_0 fill:#FBE9E7,stroke:#FF8A65
+    style nest1_1 fill:#FBE9E7,stroke:#FF8A65
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#61CAC3,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_206.txt b/test/mermaid/hard/mermaid_206.txt
new file mode 100644
index 0000000000000000000000000000000000000000..f37b0357a037b29bf05d57d949ff70ea561456df
--- /dev/null
+++ b/test/mermaid/hard/mermaid_206.txt
@@ -0,0 +1,43 @@
+<Compliance and Governance at Edge, connectedTo, Resource Management at Edge>
+<Containerization at Edge, connectedTo, Latency Reduction>
+<Data Synchronization between Edge and Cloud, connectedTo, Compliance and Governance at Edge>
+<Distributed Data Storage, connectedTo, Edge AI Model Deployment>
+<Edge AI Model Deployment, connectedTo, Orchestration of Edge Workloads>
+<Edge AI Model Deployment, connectedTo, Real_time Analytics at Edge>
+<Edge API Management, connectedTo, Healthcare Edge Computing>
+<Edge Device Analytics, connectedTo, Data Synchronization between Edge and Cloud>
+<Edge Device Analytics, connectedTo, Distributed Data Storage>
+<Edge Device Analytics, connectedTo, Power Consumption Optimization>
+<Edge Gateway Management, connectedTo, Distributed Data Storage>
+<Edge Gateway Management, connectedTo, Edge AI Model Deployment>
+<Edge Gateway Management, connectedTo, Real_time Analytics at Edge>
+<Edge Gateway Management, connectedTo, Virtualization at Edge>
+<Edge_to_Cloud Data Transfer Optimization, connectedTo, Containerization at Edge>
+<Edge_to_Cloud Data Transfer Optimization, partOf, Smart City Edge Solutions>
+<Event_Driven Architectures at Edge, connectedTo, Containerization at Edge>
+<Event_Driven Architectures at Edge, connectedTo, Distributed Data Storage>
+<Event_Driven Architectures at Edge, connectedTo, Edge Gateway Management>
+<Event_Driven Architectures at Edge, connectedTo, Latency Reduction>
+<Fault Tolerance at Edge, connectedTo, Data Synchronization between Edge and Cloud>
+<Fault Tolerance at Edge, connectedTo, Distributed Data Storage>
+<Fault Tolerance at Edge, connectedTo, Security for Edge Devices>
+<Healthcare Edge Computing, connectedTo, Local AI or ML Inference>
+<Industrial Edge Computing, connectedTo, Telecom Edge Computing>
+<Industrial Edge Computing, partOf, Smart City Edge Solutions>
+<Latency Reduction, connectedTo, Distributed Data Storage>
+<Latency Reduction, connectedTo, Edge Gateway Management>
+<Local AI or ML Inference, connectedTo, Event_Driven Architectures at Edge>
+<Microservices on Edge Devices, connectedTo, Edge AI Model Deployment>
+<Microservices on Edge Devices, partOf, Fleet Management for Edge Devices>
+<Orchestration of Edge Workloads, connectedTo, Microservices on Edge Devices>
+<Orchestration of Edge Workloads, partOf, Fleet Management for Edge Devices>
+<Power Consumption Optimization, connectedTo, Data Synchronization between Edge and Cloud>
+<Power Consumption Optimization, connectedTo, Fault Tolerance at Edge>
+<Real_time Analytics at Edge, connectedTo, Remote Device Management>
+<Real_time Analytics at Edge, connectedTo, Virtualization at Edge>
+<Remote Device Management, connectedTo, Industrial Edge Computing>
+<Remote Device Management, partOf, Smart City Edge Solutions>
+<Resource Management at Edge, distributes workloads, Edge API Management>
+<Security for Edge Devices, connectedTo, Data Synchronization between Edge and Cloud>
+<Telecom Edge Computing, connectedTo, Edge_to_Cloud Data Transfer Optimization>
+<Telecom Edge Computing, partOf, Smart City Edge Solutions>
diff --git a/test/mermaid/hard/mermaid_207.mmd b/test/mermaid/hard/mermaid_207.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..0387e422fec93414a005e4db256c5c9ac6879bb3
--- /dev/null
+++ b/test/mermaid/hard/mermaid_207.mmd
@@ -0,0 +1,148 @@
+graph LR
+    N0([start])
+    N1(Data Filtering at Edge)
+    N2(Local AI or ML Inference)
+    N3[(Distributed Data Storage)]
+    N4[(Sensor Data Aggregation)]
+    N5([Event_Driven Architectures at Edge])
+    N6([Edge Network Topology Design])
+    N7[Real_time Analytics at Edge]
+    N8[[Fault Tolerance at Edge]]
+    N9(Healthcare Edge Computing)
+    N10{Compliance and Governance at Edge}
+    N11[Latency Reduction]
+    N12([Microservices on Edge Devices])
+    N13[(Connectivity to Cloud)]
+    N14([Fleet Management for Edge Devices])
+    N15[/Edge Application Development/]
+    N16[[Security for Edge Devices]]
+    N17[Edge Computing Hardware Selection]
+    N18([Resource Management at Edge])
+    S0(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Edge_to_Cloud Data Transfer Optimization
+        nest0_0[[Industrial Edge Computing]]
+        nest0_1[Edge Device Deployment]
+    end
+    subgraph Power Consumption Optimization
+        nest1_0(Smart City Edge Solutions)
+        nest1_1[Virtualization at Edge]
+        nest1_2(Containerization at Edge)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> |provides fault tolerance| N10
+    N10 --> N11
+    N11 -.-> |optimizes telecoms| N12
+    N12 --> N13
+    N13 -.-> |enhances privacy| N14
+    N14 --> N15
+    N15 -.-> N16
+    N16 -.-> N17
+    N17 -.-> N18
+    nest0_0 -.-> nest0_1
+    N11 -.-> nest0_0
+    nest0_1 -.-> N14
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N7 -.-> nest1_0
+    nest1_2 --> N7
+    N12 -.-> S0
+    S0 --> N14
+    S0 --> N15
+    S0 --> N16
+    S0 --> N17
+    N3 --> S2
+    S2 -.-> N17
+    S2 --> |builds smart cities| N10
+    S2 -.-> N8
+    S2 -.-> N12
+    N2 -.-> M0
+    N1 -.-> M0
+    N3 --> M0
+    M0 -.-> N6
+    N1 --> |distributes workloads| M1
+    N0 -.-> |optimizes resources| M1
+    N3 --> M1
+    M1 --> N5
+    style N0 fill:#FCE4EC,stroke:#F06292
+    style N1 fill:#FCE4EC,stroke:#F06292
+    style N2 fill:#EDF5F3,stroke:#A1D7CD
+    style N3 fill:#F1F8E9,stroke:#388E3C
+    style N4 fill:#FCE4EC,stroke:#F06292
+    style N5 fill:#FCE4EC,stroke:#F06292
+    style N6 fill:#F1F8E9,stroke:#388E3C
+    style N7 fill:#F1F8E9,stroke:#388E3C
+    style N8 fill:#FCE4EC,stroke:#F06292
+    style N9 fill:#FCE4EC,stroke:#F06292
+    style N10 fill:#EDF5F3,stroke:#A1D7CD
+    style N11 fill:#FCE4EC,stroke:#F06292
+    style N12 fill:#EDF5F3,stroke:#A1D7CD
+    style N13 fill:#FCE4EC,stroke:#F06292
+    style N14 fill:#F1F8E9,stroke:#388E3C
+    style N15 fill:#F1F8E9,stroke:#388E3C
+    style N16 fill:#FCE4EC,stroke:#F06292
+    style N17 fill:#FCE4EC,stroke:#F06292
+    style N18 fill:#EDF5F3,stroke:#A1D7CD
+    style S0 fill:#EDF5F3,stroke:#A1D7CD
+    style S2 fill:#F1F8E9,stroke:#388E3C
+    style M0 fill:#FCE4EC,stroke:#F06292
+    style M1 fill:#FCE4EC,stroke:#F06292
+    style nest0_0 fill:#F1F8E9,stroke:#388E3C
+    style nest0_1 fill:#F1F8E9,stroke:#388E3C
+    style nest1_0 fill:#FCE4EC,stroke:#F06292
+    style nest1_1 fill:#EDF5F3,stroke:#A1D7CD
+    style nest1_2 fill:#FCE4EC,stroke:#F06292
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_207.txt b/test/mermaid/hard/mermaid_207.txt
new file mode 100644
index 0000000000000000000000000000000000000000..879d00defccc0f1fc8ce150a222d9e0ca073716a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_207.txt
@@ -0,0 +1,44 @@
+<Compliance and Governance at Edge, connectedTo, Latency Reduction>
+<Connectivity to Cloud, enhances privacy, Fleet Management for Edge Devices>
+<Containerization at Edge, connectedTo, Real_time Analytics at Edge>
+<Containerization at Edge, partOf, Power Consumption Optimization>
+<Data Filtering at Edge, connectedTo, Edge Network Topology Design>
+<Data Filtering at Edge, connectedTo, Local AI or ML Inference>
+<Data Filtering at Edge, distributes workloads, Event_Driven Architectures at Edge>
+<Distributed Data Storage, builds smart cities, Compliance and Governance at Edge>
+<Distributed Data Storage, connectedTo, Edge Computing Hardware Selection>
+<Distributed Data Storage, connectedTo, Edge Network Topology Design>
+<Distributed Data Storage, connectedTo, Event_Driven Architectures at Edge>
+<Distributed Data Storage, connectedTo, Fault Tolerance at Edge>
+<Distributed Data Storage, connectedTo, Microservices on Edge Devices>
+<Distributed Data Storage, connectedTo, Sensor Data Aggregation>
+<Edge Application Development, connectedTo, Security for Edge Devices>
+<Edge Computing Hardware Selection, connectedTo, Resource Management at Edge>
+<Edge Device Deployment, connectedTo, Fleet Management for Edge Devices>
+<Edge Device Deployment, partOf, Edge_to_Cloud Data Transfer Optimization>
+<Edge Network Topology Design, connectedTo, Real_time Analytics at Edge>
+<Event_Driven Architectures at Edge, connectedTo, Edge Network Topology Design>
+<Fault Tolerance at Edge, connectedTo, Healthcare Edge Computing>
+<Fleet Management for Edge Devices, connectedTo, Edge Application Development>
+<Healthcare Edge Computing, provides fault tolerance, Compliance and Governance at Edge>
+<Industrial Edge Computing, connectedTo, Edge Device Deployment>
+<Industrial Edge Computing, partOf, Edge_to_Cloud Data Transfer Optimization>
+<Latency Reduction, connectedTo, Industrial Edge Computing>
+<Latency Reduction, optimizes telecoms, Microservices on Edge Devices>
+<Local AI or ML Inference, connectedTo, Distributed Data Storage>
+<Local AI or ML Inference, connectedTo, Edge Network Topology Design>
+<Microservices on Edge Devices, connectedTo, Connectivity to Cloud>
+<Microservices on Edge Devices, connectedTo, Edge Application Development>
+<Microservices on Edge Devices, connectedTo, Edge Computing Hardware Selection>
+<Microservices on Edge Devices, connectedTo, Fleet Management for Edge Devices>
+<Microservices on Edge Devices, connectedTo, Security for Edge Devices>
+<Real_time Analytics at Edge, connectedTo, Fault Tolerance at Edge>
+<Real_time Analytics at Edge, connectedTo, Smart City Edge Solutions>
+<Security for Edge Devices, connectedTo, Edge Computing Hardware Selection>
+<Sensor Data Aggregation, connectedTo, Event_Driven Architectures at Edge>
+<Smart City Edge Solutions, connectedTo, Virtualization at Edge>
+<Smart City Edge Solutions, partOf, Power Consumption Optimization>
+<Virtualization at Edge, connectedTo, Containerization at Edge>
+<Virtualization at Edge, partOf, Power Consumption Optimization>
+<start, connectedTo, Data Filtering at Edge>
+<start, optimizes resources, Event_Driven Architectures at Edge>
diff --git a/test/mermaid/hard/mermaid_208.mmd b/test/mermaid/hard/mermaid_208.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..a299a3100cc4780843965ad1eb7da3e7c56b8c80
--- /dev/null
+++ b/test/mermaid/hard/mermaid_208.mmd
@@ -0,0 +1,114 @@
+graph RL
+    N0([start])
+    N1[(Private Cloud Management)]
+    N2{CI or CD Pipelines in Cloud}
+    N3[[Network Configuration in Cloud]]
+    N4[Infrastructure as a Service]
+    N5([Cloud Vendor Lock_in Mitigation])
+    N6{Hybrid Cloud Deployment}
+    N7{Cloud Migration Strategy}
+    N8[/Big Data Services in Cloud/]
+    N9[Edge_to_Cloud Integration]
+    N10[Cloud Governance]
+    N11(Data Storage in Cloud)
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph API Management in Cloud
+        nest0_0([Multi_Cloud Management])
+        nest0_1[Cloud FinOps]
+        nest0_2[/Cloud Firewall Configuration/]
+        nest0_3[Auto_Scaling Configurations]
+    end
+    subgraph Identity and Access Management
+        nest1_0[/Cloud_based VPN Setup/]
+        nest1_1{Serverless Computing}
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    nest0_0 --> nest0_1
+    nest0_1 --> |enables autoscaling| nest0_2
+    nest0_2 --> nest0_3
+    N2 -.-> nest0_0
+    nest0_3 --> N2
+    nest1_0 --> nest1_1
+    N6 --> nest1_0
+    nest1_1 -.-> N4
+    N6 --> S0
+    S0 --> N10
+    S0 --> N9
+    N8 -.-> S1
+    S1 -.-> N10
+    S1 -.-> |architects solutions| N11
+    N0 -.-> M0
+    N2 -.-> M0
+    N1 -.-> M0
+    M0 -.-> N4
+    N0 -.-> M1
+    N1 --> M1
+    M1 -.-> N4
+    style N0 fill:#FFF3E0,stroke:#FFA726
+    style N1 fill:#C9EFEC,stroke:#6FE1D5
+    style N2 fill:#FFF9D4,stroke:#FFE69C
+    style N3 fill:#FFF9D4,stroke:#FFE69C
+    style N4 fill:#C9EFEC,stroke:#6FE1D5
+    style N5 fill:#FFF9D4,stroke:#FFE69C
+    style N6 fill:#FFF9D4,stroke:#FFE69C
+    style N7 fill:#FFF3E0,stroke:#FFA726
+    style N8 fill:#FFF9D4,stroke:#FFE69C
+    style N9 fill:#FFF9D4,stroke:#FFE69C
+    style N10 fill:#FFF3E0,stroke:#FFA726
+    style N11 fill:#C9EFEC,stroke:#6FE1D5
+    style S0 fill:#FFF3E0,stroke:#FFA726
+    style S1 fill:#FFF3E0,stroke:#FFA726
+    style M0 fill:#FFF3E0,stroke:#FFA726
+    style M1 fill:#FFF3E0,stroke:#FFA726
+    style nest0_0 fill:#FFF3E0,stroke:#FFA726
+    style nest0_1 fill:#FFF3E0,stroke:#FFA726
+    style nest0_2 fill:#C9EFEC,stroke:#6FE1D5
+    style nest0_3 fill:#C9EFEC,stroke:#6FE1D5
+    style nest1_0 fill:#C9EFEC,stroke:#6FE1D5
+    style nest1_1 fill:#C9EFEC,stroke:#6FE1D5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFA726,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_208.txt b/test/mermaid/hard/mermaid_208.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ea0bf6e060712eb7c31f21c29da594052a1c2a4c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_208.txt
@@ -0,0 +1,32 @@
+<Auto_Scaling Configurations, connectedTo, CI or CD Pipelines in Cloud>
+<Auto_Scaling Configurations, partOf, API Management in Cloud>
+<Big Data Services in Cloud, architects solutions, Data Storage in Cloud>
+<Big Data Services in Cloud, connectedTo, Cloud Governance>
+<Big Data Services in Cloud, connectedTo, Edge_to_Cloud Integration>
+<CI or CD Pipelines in Cloud, connectedTo, Infrastructure as a Service>
+<CI or CD Pipelines in Cloud, connectedTo, Multi_Cloud Management>
+<CI or CD Pipelines in Cloud, connectedTo, Network Configuration in Cloud>
+<Cloud FinOps, enables autoscaling, Cloud Firewall Configuration>
+<Cloud FinOps, partOf, API Management in Cloud>
+<Cloud Firewall Configuration, connectedTo, Auto_Scaling Configurations>
+<Cloud Firewall Configuration, partOf, API Management in Cloud>
+<Cloud Governance, connectedTo, Data Storage in Cloud>
+<Cloud Migration Strategy, connectedTo, Big Data Services in Cloud>
+<Cloud Vendor Lock_in Mitigation, connectedTo, Hybrid Cloud Deployment>
+<Cloud_based VPN Setup, connectedTo, Serverless Computing>
+<Cloud_based VPN Setup, partOf, Identity and Access Management>
+<Edge_to_Cloud Integration, connectedTo, Cloud Governance>
+<Hybrid Cloud Deployment, connectedTo, Cloud Governance>
+<Hybrid Cloud Deployment, connectedTo, Cloud Migration Strategy>
+<Hybrid Cloud Deployment, connectedTo, Cloud_based VPN Setup>
+<Hybrid Cloud Deployment, connectedTo, Edge_to_Cloud Integration>
+<Infrastructure as a Service, connectedTo, Cloud Vendor Lock_in Mitigation>
+<Multi_Cloud Management, connectedTo, Cloud FinOps>
+<Multi_Cloud Management, partOf, API Management in Cloud>
+<Network Configuration in Cloud, connectedTo, Infrastructure as a Service>
+<Private Cloud Management, connectedTo, CI or CD Pipelines in Cloud>
+<Private Cloud Management, connectedTo, Infrastructure as a Service>
+<Serverless Computing, connectedTo, Infrastructure as a Service>
+<Serverless Computing, partOf, Identity and Access Management>
+<start, connectedTo, Infrastructure as a Service>
+<start, connectedTo, Private Cloud Management>
diff --git a/test/mermaid/hard/mermaid_209.mmd b/test/mermaid/hard/mermaid_209.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..527f982026e875abf580e16280dc5cc5fbcc0848
--- /dev/null
+++ b/test/mermaid/hard/mermaid_209.mmd
@@ -0,0 +1,116 @@
+graph RL
+    N0([start])
+    N1[(Cloud Governance)]
+    N2[/Virtual Machine Management/]
+    N3(Container Orchestration)
+    N4{Compliance in Cloud}
+    N5[[Network Configuration in Cloud]]
+    N6[(Multi_Cloud Management)]
+    N7(Platform as a Service)
+    N8[[Cloud Migration Strategy]]
+    N9[/DevOps on Cloud/]
+    N10([Load Balancing in Cloud])
+    N11([Data Storage in Cloud])
+    N12(Cloud Vendor Lock_in Mitigation)
+    N13[Cloud Backup Solutions]
+    N14([Hybrid Cloud Deployment])
+    N15(Public Cloud Management)
+    N16[[Private Cloud Management]]
+    N17[Infrastructure as a Service]
+    N18([CI or CD Pipelines in Cloud])
+    N19([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    subgraph Cloud Automation
+        nest0_0[[Cloud_based VPN Setup]]
+        nest0_1[[Big Data Services in Cloud]]
+    end
+    subgraph Database as a Service
+        nest1_0{Identity and Access Management}
+        nest1_1[Disaster Recovery in Cloud]
+        nest1_2[[Software as a Service]]
+        nest1_3(API Management in Cloud)
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 --> N13
+    N13 --> N14
+    N14 -.-> N15
+    N15 --> N16
+    N16 -.-> N17
+    N17 -.-> N18
+    N18 --> N19
+    nest0_0 --> nest0_1
+    N6 -.-> |no| nest0_0
+    nest0_1 --> N4
+    nest1_0 --> |no| nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> |yes| nest1_3
+    N13 --> |yes| nest1_0
+    nest1_3 -.-> N15
+    N15 --> S0
+    S0 -.-> N19
+    S0 -.-> N18
+    S0 --> |no| N17
+    N3 --> S1
+    S1 -.-> N7
+    S1 -.-> |yes| N6
+    S1 --> N10
+    N6 --> M0
+    N8 --> M0
+    N4 -.-> M0
+    M0 -.-> N19
+    style S0 fill:#FAEBF3,stroke:#F7BEE0
+    style S1 fill:#DACBE3,stroke:#A188D0
+    style M0 fill:#FAEBF3,stroke:#F7BEE0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#F7BEE0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_209.txt b/test/mermaid/hard/mermaid_209.txt
new file mode 100644
index 0000000000000000000000000000000000000000..cd9eaddc304c17fa7b678e91312c8337d62cf374
--- /dev/null
+++ b/test/mermaid/hard/mermaid_209.txt
@@ -0,0 +1,42 @@
+<API Management in Cloud, connectedTo, Public Cloud Management>
+<API Management in Cloud, partOf, Database as a Service>
+<Big Data Services in Cloud, connectedTo, Compliance in Cloud>
+<Big Data Services in Cloud, partOf, Cloud Automation>
+<CI or CD Pipelines in Cloud, connectedTo, end>
+<Cloud Backup Solutions, connectedTo, Hybrid Cloud Deployment>
+<Cloud Backup Solutions, yes, Identity and Access Management>
+<Cloud Governance, connectedTo, Virtual Machine Management>
+<Cloud Migration Strategy, connectedTo, DevOps on Cloud>
+<Cloud Migration Strategy, connectedTo, end>
+<Cloud Vendor Lock_in Mitigation, connectedTo, Cloud Backup Solutions>
+<Cloud_based VPN Setup, connectedTo, Big Data Services in Cloud>
+<Cloud_based VPN Setup, partOf, Cloud Automation>
+<Compliance in Cloud, connectedTo, Network Configuration in Cloud>
+<Compliance in Cloud, connectedTo, end>
+<Container Orchestration, connectedTo, Compliance in Cloud>
+<Container Orchestration, connectedTo, Load Balancing in Cloud>
+<Container Orchestration, connectedTo, Platform as a Service>
+<Container Orchestration, yes, Multi_Cloud Management>
+<Data Storage in Cloud, connectedTo, Cloud Vendor Lock_in Mitigation>
+<DevOps on Cloud, connectedTo, Load Balancing in Cloud>
+<Disaster Recovery in Cloud, connectedTo, Software as a Service>
+<Disaster Recovery in Cloud, partOf, Database as a Service>
+<Hybrid Cloud Deployment, connectedTo, Public Cloud Management>
+<Identity and Access Management, no, Disaster Recovery in Cloud>
+<Identity and Access Management, partOf, Database as a Service>
+<Infrastructure as a Service, connectedTo, CI or CD Pipelines in Cloud>
+<Load Balancing in Cloud, connectedTo, Data Storage in Cloud>
+<Multi_Cloud Management, connectedTo, Platform as a Service>
+<Multi_Cloud Management, connectedTo, end>
+<Multi_Cloud Management, no, Cloud_based VPN Setup>
+<Network Configuration in Cloud, connectedTo, Multi_Cloud Management>
+<Platform as a Service, connectedTo, Cloud Migration Strategy>
+<Private Cloud Management, connectedTo, Infrastructure as a Service>
+<Public Cloud Management, connectedTo, CI or CD Pipelines in Cloud>
+<Public Cloud Management, connectedTo, Private Cloud Management>
+<Public Cloud Management, connectedTo, end>
+<Public Cloud Management, no, Infrastructure as a Service>
+<Software as a Service, partOf, Database as a Service>
+<Software as a Service, yes, API Management in Cloud>
+<Virtual Machine Management, connectedTo, Container Orchestration>
+<start, connectedTo, Cloud Governance>
diff --git a/test/mermaid/hard/mermaid_21.mmd b/test/mermaid/hard/mermaid_21.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..669d3970b52c5dfd1bd0cbccb485bb71713f7132
--- /dev/null
+++ b/test/mermaid/hard/mermaid_21.mmd
@@ -0,0 +1,132 @@
+graph LR
+    N0([start])
+    N1([Hydropower Generation])
+    N2[Grid Balancing]
+    N3[(Energy Efficiency Audit)]
+    N4([Energy Market Analysis])
+    N5[[Energy Trading]]
+    N6{Fuel Delivery}
+    N7[(Energy Infrastructure Planning)]
+    N8[/Demand Forecast/]
+    N9[Cybersecurity for Grid]
+    N10[Nuclear Reactor Control]
+    N11[Transformer Station]
+    N12[/Circuit Breaker Operation/]
+    N13{Load Distribution}
+    N14[Smart Metering]
+    N15[Alert Dispatch]
+    N16[(Distributed Generation Management)]
+    N17([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Carbon Capture
+        nest0_0[[Sensor Reading]]
+        nest0_1(Power Backup)
+        nest0_2[/Power Purchase/]
+    end
+    subgraph Wind Turbine Monitoring
+        nest1_0{Oil and Gas Exploration}
+        nest1_1[(Usage Billing)]
+        nest1_2[/Transmission Line Maintenance/]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> |no| N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> |yes| N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 --> N16
+    N16 -.-> N17
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N16 --> nest0_0
+    nest0_2 -.-> N14
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N8 --> nest1_0
+    nest1_2 --> N9
+    N10 -.-> S0
+    S0 -.-> N17
+    S0 --> N13
+    S0 --> N15
+    N8 --> S1
+    S1 --> N15
+    S1 -.-> N16
+    N0 -.-> S2
+    S2 --> N5
+    S2 --> N8
+    N9 -.-> M0
+    N2 -.-> M0
+    M0 --> N11
+    N0 --> M1
+    N2 --> M1
+    N1 --> M1
+    M1 --> N5
+    N2 -.-> |yes| M2
+    N1 --> M2
+    M2 --> N6
+    style S0 fill:#ECF0FD,stroke:#B8C0F5
+    style S1 fill:#E0F2F1,stroke:#4DB6AC
+    style S2 fill:#F5F5DC,stroke:#BCB88A
+    style M0 fill:#ECF0FD,stroke:#B8C0F5
+    style M1 fill:#E0F2F1,stroke:#4DB6AC
+    style M2 fill:#E0F2F1,stroke:#4DB6AC
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 44 stroke:#B8C0F5,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_210.mmd b/test/mermaid/hard/mermaid_210.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..3a33e4449daccb328256fc88714ca1590c624fb0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_210.mmd
@@ -0,0 +1,112 @@
+graph LR
+    N0([start])
+    N1(Compliance in Cloud)
+    N2{Data Storage in Cloud}
+    N3[(Public Cloud Management)]
+    N4[[Big Data Services in Cloud]]
+    N5[(Cost Optimization in Cloud)]
+    N6[Serverless Computing]
+    N7([Identity and Access Management])
+    N8{Cloud FinOps}
+    N9[/Network Configuration in Cloud/]
+    N10(Private Cloud Management)
+    N11(Cloud Automation)
+    N12(Cloud Marketplace Integration)
+    N13[/Cloud_based VPN Setup/]
+    N14[/Virtual Machine Management/]
+    N15[(Hybrid Cloud Deployment)]
+    N16[[Software as a Service]]
+    N17([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Load Balancing in Cloud
+        nest0_0[Platform as a Service]
+        nest0_1[/Edge_to_Cloud Integration/]
+    end
+    subgraph Container Orchestration
+        nest1_0[Cloud Backup Solutions]
+        nest1_1{DevOps on Cloud}
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> |no| N8
+    N8 -.-> |yes| N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> N12
+    N12 -.-> |no| N13
+    N13 -.-> N14
+    N14 -.-> N15
+    N15 --> N16
+    N16 -.-> N17
+    nest0_0 -.-> nest0_1
+    N1 --> |no| nest0_0
+    nest0_1 --> N14
+    nest1_0 -.-> nest1_1
+    N3 -.-> nest1_0
+    nest1_1 --> N11
+    N14 -.-> S0
+    S0 --> N16
+    S0 -.-> |no| N17
+    N10 -.-> S1
+    S1 -.-> N12
+    S1 -.-> N15
+    S1 -.-> N14
+    S1 --> N16
+    N3 --> M0
+    N4 --> M0
+    M0 --> N6
+    N4 --> M1
+    N8 --> M1
+    N1 -.-> M1
+    M1 --> N12
+    style S0 fill:#FFFCE6,stroke:#FFF9AE
+    style S1 fill:#FFFCE6,stroke:#FFF9AE
+    style M0 fill:#F1F8E9,stroke:#81C784
+    style M1 fill:#EFEBE9,stroke:#A1887F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_210.txt b/test/mermaid/hard/mermaid_210.txt
new file mode 100644
index 0000000000000000000000000000000000000000..9354145da7e5932776360cefc8d8ec9ee7cacd64
--- /dev/null
+++ b/test/mermaid/hard/mermaid_210.txt
@@ -0,0 +1,38 @@
+<Big Data Services in Cloud, connectedTo, Cloud Marketplace Integration>
+<Big Data Services in Cloud, connectedTo, Cost Optimization in Cloud>
+<Big Data Services in Cloud, connectedTo, Serverless Computing>
+<Cloud Automation, connectedTo, Cloud Marketplace Integration>
+<Cloud Backup Solutions, connectedTo, DevOps on Cloud>
+<Cloud Backup Solutions, partOf, Container Orchestration>
+<Cloud FinOps, connectedTo, Cloud Marketplace Integration>
+<Cloud FinOps, yes, Network Configuration in Cloud>
+<Cloud Marketplace Integration, no, Cloud_based VPN Setup>
+<Cloud_based VPN Setup, connectedTo, Virtual Machine Management>
+<Compliance in Cloud, connectedTo, Cloud Marketplace Integration>
+<Compliance in Cloud, connectedTo, Data Storage in Cloud>
+<Compliance in Cloud, no, Platform as a Service>
+<Cost Optimization in Cloud, connectedTo, Serverless Computing>
+<Data Storage in Cloud, connectedTo, Public Cloud Management>
+<DevOps on Cloud, connectedTo, Cloud Automation>
+<DevOps on Cloud, partOf, Container Orchestration>
+<Edge_to_Cloud Integration, connectedTo, Virtual Machine Management>
+<Edge_to_Cloud Integration, partOf, Load Balancing in Cloud>
+<Hybrid Cloud Deployment, connectedTo, Software as a Service>
+<Identity and Access Management, no, Cloud FinOps>
+<Network Configuration in Cloud, connectedTo, Private Cloud Management>
+<Platform as a Service, connectedTo, Edge_to_Cloud Integration>
+<Platform as a Service, partOf, Load Balancing in Cloud>
+<Private Cloud Management, connectedTo, Cloud Automation>
+<Private Cloud Management, connectedTo, Cloud Marketplace Integration>
+<Private Cloud Management, connectedTo, Hybrid Cloud Deployment>
+<Private Cloud Management, connectedTo, Software as a Service>
+<Private Cloud Management, connectedTo, Virtual Machine Management>
+<Public Cloud Management, connectedTo, Big Data Services in Cloud>
+<Public Cloud Management, connectedTo, Cloud Backup Solutions>
+<Public Cloud Management, connectedTo, Serverless Computing>
+<Serverless Computing, connectedTo, Identity and Access Management>
+<Software as a Service, connectedTo, end>
+<Virtual Machine Management, connectedTo, Hybrid Cloud Deployment>
+<Virtual Machine Management, connectedTo, Software as a Service>
+<Virtual Machine Management, no, end>
+<start, connectedTo, Compliance in Cloud>
diff --git a/test/mermaid/hard/mermaid_211.mmd b/test/mermaid/hard/mermaid_211.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..605a956a3baa111cdd2e91c9d2ef92955125ea1b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_211.mmd
@@ -0,0 +1,150 @@
+graph BT
+    N0([Hardware Maintenance])
+    N1(DNS Management)
+    N2[Data Center Management]
+    N3([IT Asset Management])
+    N4[/Monitoring and Alerting/]
+    N5[(Network Performance Tuning)]
+    N6(Cabling and Wiring)
+    N7[Network Design]
+    N8([Virtualization])
+    N9[(Troubleshooting and Support)]
+    N10(Firewall Management)
+    N11([Cloud Integration with On_premise])
+    N12[(Proxy Server Configuration)]
+    N13[/Access Control Systems/]
+    N14(System Administration)
+    N15[[Load Balancer Setup]]
+    N16(Disaster Recovery Planning)
+    N17{Automation Scripting}
+    N18([VPN Configuration])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Capacity Planning
+        nest0_0{Database Administration}
+        nest0_1[User Account Management]
+    end
+    subgraph Backup and Recovery Systems
+        nest1_0[Server Deployment]
+        nest1_1[/Web Server Configuration/]
+        nest1_2(Environmental Monitoring)
+        nest1_3{Remote Access Solutions}
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> |configures web servers| N5
+    N5 --> |manages licenses| N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 -.-> N16
+    N16 --> N17
+    N17 --> N18
+    nest0_0 -.-> nest0_1
+    N11 -.-> nest0_0
+    nest0_1 --> N3
+    nest1_0 --> nest1_1
+    nest1_1 --> |manages mail servers| nest1_2
+    nest1_2 --> nest1_3
+    N2 -.-> nest1_0
+    nest1_3 --> N18
+    N15 -.-> S0
+    S0 --> |plans capacity| N18
+    S0 --> N17
+    N5 -.-> S1
+    S1 --> N18
+    S1 -.-> N7
+    N0 --> |installs software| M0
+    N6 --> M0
+    N7 --> |monitors performance| M0
+    M0 -.-> N16
+    N2 --> M1
+    N10 --> M1
+    M1 -.-> N18
+    N1 -.-> M2
+    N0 -.-> M2
+    M2 --> N3
+    style N0 fill:#D3D7EB,stroke:#8C9EFF
+    style N1 fill:#D3D7EB,stroke:#8C9EFF
+    style N2 fill:#C2E8E6,stroke:#61CAC3
+    style N3 fill:#D3D7EB,stroke:#8C9EFF
+    style N4 fill:#D3D7EB,stroke:#8C9EFF
+    style N5 fill:#D3D7EB,stroke:#8C9EFF
+    style N6 fill:#C2E8E6,stroke:#61CAC3
+    style N7 fill:#C2E8E6,stroke:#61CAC3
+    style N8 fill:#C2E8E6,stroke:#61CAC3
+    style N9 fill:#D3D7EB,stroke:#8C9EFF
+    style N10 fill:#C2E8E6,stroke:#61CAC3
+    style N11 fill:#EFE6FF,stroke:#C2B2F0
+    style N12 fill:#EFE6FF,stroke:#C2B2F0
+    style N13 fill:#EFE6FF,stroke:#C2B2F0
+    style N14 fill:#C2E8E6,stroke:#61CAC3
+    style N15 fill:#EFE6FF,stroke:#C2B2F0
+    style N16 fill:#D3D7EB,stroke:#8C9EFF
+    style N17 fill:#EFE6FF,stroke:#C2B2F0
+    style N18 fill:#EFE6FF,stroke:#C2B2F0
+    style S0 fill:#EFE6FF,stroke:#C2B2F0
+    style S1 fill:#EFE6FF,stroke:#C2B2F0
+    style M0 fill:#C2E8E6,stroke:#61CAC3
+    style M1 fill:#C2E8E6,stroke:#61CAC3
+    style M2 fill:#EFE6FF,stroke:#C2B2F0
+    style nest0_0 fill:#D3D7EB,stroke:#8C9EFF
+    style nest0_1 fill:#EFE6FF,stroke:#C2B2F0
+    style nest1_0 fill:#D3D7EB,stroke:#8C9EFF
+    style nest1_1 fill:#EFE6FF,stroke:#C2B2F0
+    style nest1_2 fill:#C2E8E6,stroke:#61CAC3
+    style nest1_3 fill:#C2E8E6,stroke:#61CAC3
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_212.mmd b/test/mermaid/hard/mermaid_212.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..84e32b7da7795b488350aabfa72c2c0e5b8f575c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_212.mmd
@@ -0,0 +1,138 @@
+graph BT
+    N0([start])
+    N1[/Network Security/]
+    N2[Hardware Maintenance]
+    N3(Firewall Management)
+    N4[Troubleshooting and Support]
+    N5{Group Policy Management}
+    N6[/Mail Server Management/]
+    N7(Cabling and Wiring)
+    N8[(DNS Management)]
+    N9(Monitoring and Alerting)
+    N10[(Proxy Server Configuration)]
+    N11(Rack and Cabinet Management)
+    N12[[Operating System Installation]]
+    N13{Environmental Monitoring}
+    N14(Access Control Systems)
+    N15{Virtualization}
+    N16([Power and Cooling Management])
+    N17([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Hardware Procurement
+        nest0_0[/IT Asset Management/]
+        nest0_1[/Cloud Integration with On_premise/]
+        nest0_2[Network Performance Tuning]
+        nest0_3[(Remote Access Solutions)]
+    end
+    subgraph Network Design
+        nest1_0([Disaster Recovery Planning])
+        nest1_1[/Backup and Recovery Systems/]
+    end
+    N0 --> N1
+    N1 --> |applies patches| N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> |secures systems| N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> |administers databases| N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> |sets up DNS| N15
+    N15 --> N16
+    N16 --> N17
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N1 --> nest0_0
+    nest0_3 -.-> N11
+    nest1_0 -.-> nest1_1
+    N11 --> nest1_0
+    nest1_1 -.-> N1
+    N7 -.-> S0
+    S0 -.-> N14
+    S0 -.-> N15
+    N11 -.-> S1
+    S1 --> N13
+    S1 -.-> N16
+    N15 -.-> |configures load balancers| M0
+    N13 -.-> M0
+    N1 -.-> |virtualizes resources| M0
+    M0 -.-> N17
+    N8 -.-> M1
+    N0 --> |lays cables| M1
+    M1 --> N14
+    style N0 fill:#E0F2F1,stroke:#4DB6AC
+    style N1 fill:#FFF0CC,stroke:#FFCC80
+    style N2 fill:#E0F2F1,stroke:#4DB6AC
+    style N3 fill:#E0F2F1,stroke:#4DB6AC
+    style N4 fill:#E0F2F1,stroke:#4DB6AC
+    style N5 fill:#FFF0CC,stroke:#FFCC80
+    style N6 fill:#FFF0CC,stroke:#FFCC80
+    style N7 fill:#E0F2F1,stroke:#4DB6AC
+    style N8 fill:#C2E8E6,stroke:#61CAC3
+    style N9 fill:#C2E8E6,stroke:#61CAC3
+    style N10 fill:#C2E8E6,stroke:#61CAC3
+    style N11 fill:#C2E8E6,stroke:#61CAC3
+    style N12 fill:#C2E8E6,stroke:#61CAC3
+    style N13 fill:#FFF0CC,stroke:#FFCC80
+    style N14 fill:#C2E8E6,stroke:#61CAC3
+    style N15 fill:#C2E8E6,stroke:#61CAC3
+    style N16 fill:#C2E8E6,stroke:#61CAC3
+    style N17 fill:#E0F2F1,stroke:#4DB6AC
+    style S0 fill:#E0F2F1,stroke:#4DB6AC
+    style S1 fill:#FFF0CC,stroke:#FFCC80
+    style M0 fill:#FFF0CC,stroke:#FFCC80
+    style M1 fill:#E0F2F1,stroke:#4DB6AC
+    style nest0_0 fill:#E0F2F1,stroke:#4DB6AC
+    style nest0_1 fill:#FFF0CC,stroke:#FFCC80
+    style nest0_2 fill:#FFF0CC,stroke:#FFCC80
+    style nest0_3 fill:#FFF0CC,stroke:#FFCC80
+    style nest1_0 fill:#C2E8E6,stroke:#61CAC3
+    style nest1_1 fill:#E0F2F1,stroke:#4DB6AC
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFCC80,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_213.mmd b/test/mermaid/hard/mermaid_213.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..18078b934ff90423e8aa834a420a0af39d084325
--- /dev/null
+++ b/test/mermaid/hard/mermaid_213.mmd
@@ -0,0 +1,128 @@
+graph TD
+    N0([Load Balancer Setup])
+    N1[(Virtual Desktop Infrastructure)]
+    N2([Software Licensing Management])
+    N3[Cabling and Wiring]
+    N4(Hardware Procurement)
+    N5[[Antivirus and Endpoint Protection]]
+    N6[(Data Center Management)]
+    N7{Network Performance Tuning}
+    N8{Operating System Installation}
+    N9[(Monitoring and Alerting)]
+    N10(Disaster Recovery Planning)
+    N11[Backup and Recovery Systems]
+    N12[[Automation Scripting]]
+    N13[/Network Design/]
+    N14([User Account Management])
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Proxy Server Configuration
+        nest0_0[[IT Asset Management]]
+        nest0_1[[Hardware Maintenance]]
+        nest0_2{Database Administration}
+        nest0_3[[Directory Services]]
+    end
+    subgraph Access Control Systems
+        nest1_0(Troubleshooting and Support)
+        nest1_1[Power and Cooling Management]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> |deploys VDIs| N9
+    N9 -.-> |installs racks| N10
+    N10 --> N11
+    N11 --> N12
+    N12 --> N13
+    N13 --> N14
+    nest0_0 --> nest0_1
+    nest0_1 -.-> |sets up VPNs| nest0_2
+    nest0_2 --> nest0_3
+    N6 --> nest0_0
+    nest0_3 --> |manages groups| N10
+    nest1_0 -.-> nest1_1
+    N13 -.-> nest1_0
+    nest1_1 -.-> N12
+    N0 --> S1
+    S1 -.-> N9
+    S1 --> N13
+    N5 -.-> S2
+    S2 --> N11
+    S2 -.-> N10
+    S2 -.-> N13
+    N2 -.-> |manages power| M0
+    N1 --> M0
+    N3 -.-> M0
+    M0 --> N6
+    N2 -.-> M1
+    N1 -.-> M1
+    M1 -.-> N4
+    style N0 fill:#FFECB3,stroke:#FFC107
+    style N1 fill:#FFECB3,stroke:#FFC107
+    style N2 fill:#FFECB3,stroke:#FFC107
+    style N3 fill:#F1F8E9,stroke:#388E3C
+    style N4 fill:#FFECB3,stroke:#FFC107
+    style N5 fill:#F1F8E9,stroke:#388E3C
+    style N6 fill:#D3F7F9,stroke:#80DDEA
+    style N7 fill:#F1F8E9,stroke:#388E3C
+    style N8 fill:#D3F7F9,stroke:#80DDEA
+    style N9 fill:#FFECB3,stroke:#FFC107
+    style N10 fill:#F1F8E9,stroke:#388E3C
+    style N11 fill:#FFECB3,stroke:#FFC107
+    style N12 fill:#D3F7F9,stroke:#80DDEA
+    style N13 fill:#D3F7F9,stroke:#80DDEA
+    style N14 fill:#F1F8E9,stroke:#388E3C
+    style S1 fill:#FFECB3,stroke:#FFC107
+    style S2 fill:#D3F7F9,stroke:#80DDEA
+    style M0 fill:#FFECB3,stroke:#FFC107
+    style M1 fill:#F1F8E9,stroke:#388E3C
+    style nest0_0 fill:#F1F8E9,stroke:#388E3C
+    style nest0_1 fill:#F1F8E9,stroke:#388E3C
+    style nest0_2 fill:#F1F8E9,stroke:#388E3C
+    style nest0_3 fill:#F1F8E9,stroke:#388E3C
+    style nest1_0 fill:#FFECB3,stroke:#FFC107
+    style nest1_1 fill:#D3F7F9,stroke:#80DDEA
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#80DDEA,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_214.mmd b/test/mermaid/hard/mermaid_214.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..a292c0296d3f3a0175e2a04777bea2dec0a27cb7
--- /dev/null
+++ b/test/mermaid/hard/mermaid_214.mmd
@@ -0,0 +1,118 @@
+graph LR
+    N0([Configuration Management])
+    N1[(Container Orchestration)]
+    N2{ChatOps}
+    N3{Continuous Integration}
+    N4[Alerting and Incident Response]
+    N5[Performance Metrics Analysis]
+    N6[[Release Management]]
+    N7(Infrastructure as Code)
+    N8(Cross_Functional Team Collaboration)
+    N9[Site Reliability Engineering Principles]
+    N10(Serverless Deployment)
+    N11[/Blue_Green Deployments/]
+    N12([Monitoring and Logging])
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Post_Mortem Analysis
+        nest0_0[/Environment Management/]
+        nest0_1[Security in DevOps]
+        nest0_2(Feedback Loops)
+    end
+    subgraph Automated Deployment
+        nest1_0{Automated Testing}
+        nest1_1(Continuous Delivery)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    nest0_0 --> |codes features| nest0_1
+    nest0_1 -.-> nest0_2
+    N11 -.-> nest0_0
+    nest0_2 -.-> N3
+    nest1_0 --> |collects metrics| nest1_1
+    N8 --> nest1_0
+    nest1_1 -.-> N1
+    N3 --> S1
+    S1 -.-> N9
+    S1 -.-> N8
+    S1 -.-> N6
+    S1 --> N11
+    N6 -.-> S2
+    S2 --> N9
+    S2 -.-> N10
+    S2 -.-> N11
+    N2 --> |automates pipelines| M0
+    N5 -.-> M0
+    M0 --> N10
+    N1 -.-> M1
+    N2 --> M1
+    M1 --> N4
+    style N0 fill:#EDE7F6,stroke:#7E57C2
+    style N1 fill:#F9FBE7,stroke:#DCE775
+    style N2 fill:#EDE7F6,stroke:#7E57C2
+    style N3 fill:#F9FBE7,stroke:#DCE775
+    style N4 fill:#DDCEDD,stroke:#AF56A6
+    style N5 fill:#EDE7F6,stroke:#7E57C2
+    style N6 fill:#DDCEDD,stroke:#AF56A6
+    style N7 fill:#EDE7F6,stroke:#7E57C2
+    style N8 fill:#DDCEDD,stroke:#AF56A6
+    style N9 fill:#F9FBE7,stroke:#DCE775
+    style N10 fill:#EDE7F6,stroke:#7E57C2
+    style N11 fill:#EDE7F6,stroke:#7E57C2
+    style N12 fill:#F9FBE7,stroke:#DCE775
+    style S1 fill:#EDE7F6,stroke:#7E57C2
+    style S2 fill:#EDE7F6,stroke:#7E57C2
+    style M0 fill:#DDCEDD,stroke:#AF56A6
+    style M1 fill:#F9FBE7,stroke:#DCE775
+    style nest0_0 fill:#DDCEDD,stroke:#AF56A6
+    style nest0_1 fill:#F9FBE7,stroke:#DCE775
+    style nest0_2 fill:#F9FBE7,stroke:#DCE775
+    style nest1_0 fill:#F9FBE7,stroke:#DCE775
+    style nest1_1 fill:#EDE7F6,stroke:#7E57C2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#AF56A6,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_214.txt b/test/mermaid/hard/mermaid_214.txt
new file mode 100644
index 0000000000000000000000000000000000000000..5574cc525014de3e1a61a9dfdb3f08ae4460b2c9
--- /dev/null
+++ b/test/mermaid/hard/mermaid_214.txt
@@ -0,0 +1,35 @@
+<Alerting and Incident Response, connectedTo, Performance Metrics Analysis>
+<Automated Testing, collects metrics, Continuous Delivery>
+<Automated Testing, partOf, Automated Deployment>
+<Blue_Green Deployments, connectedTo, Environment Management>
+<Blue_Green Deployments, connectedTo, Monitoring and Logging>
+<ChatOps, automates pipelines, Serverless Deployment>
+<ChatOps, connectedTo, Alerting and Incident Response>
+<ChatOps, connectedTo, Continuous Integration>
+<Configuration Management, connectedTo, Container Orchestration>
+<Container Orchestration, connectedTo, Alerting and Incident Response>
+<Container Orchestration, connectedTo, ChatOps>
+<Continuous Delivery, connectedTo, Container Orchestration>
+<Continuous Delivery, partOf, Automated Deployment>
+<Continuous Integration, connectedTo, Alerting and Incident Response>
+<Continuous Integration, connectedTo, Blue_Green Deployments>
+<Continuous Integration, connectedTo, Cross_Functional Team Collaboration>
+<Continuous Integration, connectedTo, Release Management>
+<Continuous Integration, connectedTo, Site Reliability Engineering Principles>
+<Cross_Functional Team Collaboration, connectedTo, Automated Testing>
+<Cross_Functional Team Collaboration, connectedTo, Site Reliability Engineering Principles>
+<Environment Management, codes features, Security in DevOps>
+<Environment Management, partOf, Post_Mortem Analysis>
+<Feedback Loops, connectedTo, Continuous Integration>
+<Feedback Loops, partOf, Post_Mortem Analysis>
+<Infrastructure as Code, connectedTo, Cross_Functional Team Collaboration>
+<Performance Metrics Analysis, connectedTo, Release Management>
+<Performance Metrics Analysis, connectedTo, Serverless Deployment>
+<Release Management, connectedTo, Blue_Green Deployments>
+<Release Management, connectedTo, Infrastructure as Code>
+<Release Management, connectedTo, Serverless Deployment>
+<Release Management, connectedTo, Site Reliability Engineering Principles>
+<Security in DevOps, connectedTo, Feedback Loops>
+<Security in DevOps, partOf, Post_Mortem Analysis>
+<Serverless Deployment, connectedTo, Blue_Green Deployments>
+<Site Reliability Engineering Principles, connectedTo, Serverless Deployment>
diff --git a/test/mermaid/hard/mermaid_215.mmd b/test/mermaid/hard/mermaid_215.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..3fd01465857b12aba6f3c967617f3c8ec53a6137
--- /dev/null
+++ b/test/mermaid/hard/mermaid_215.mmd
@@ -0,0 +1,95 @@
+graph TD
+    N0([start])
+    N1[(Dynamic Application Security Testing)]
+    N2[Post_Mortem Analysis]
+    N3[/Microservices Architecture/]
+    N4[Canary Releases]
+    N5[Observability Implementation]
+    N6[(Container Orchestration)]
+    N7(Environment Management)
+    N8[Alerting and Incident Response]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Version Control
+        nest0_0[/GitOps/]
+        nest0_1[Serverless Deployment]
+        nest0_2(Collaboration Tools)
+        nest0_3(Cloud Native Development)
+    end
+    subgraph Containerization
+        nest1_0[[Release Management]]
+        nest1_1(Security in DevOps)
+    end
+    N0 -.-> N1
+    N1 --> |yes| N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N6 --> nest0_0
+    nest0_3 -.-> N1
+    nest1_0 --> nest1_1
+    N7 -.-> nest1_0
+    nest1_1 -.-> N8
+    N5 -.-> S0
+    S0 --> N7
+    S0 --> N8
+    N3 -.-> S1
+    S1 --> N5
+    S1 --> N8
+    N2 -.-> M0
+    N5 -.-> |no| M0
+    M0 --> N7
+    N4 --> M1
+    N1 -.-> |yes| M1
+    N0 -.-> M1
+    M1 -.-> N6
+    N0 --> M2
+    N1 -.-> M2
+    M2 --> N3
+    style S0 fill:#D0EFEE,stroke:#73C6BC
+    style S1 fill:#F8BBD0,stroke:#E91E63
+    style M0 fill:#F8BBD0,stroke:#E91E63
+    style M1 fill:#D0EFEE,stroke:#73C6BC
+    style M2 fill:#F8BBD0,stroke:#E91E63
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_215.txt b/test/mermaid/hard/mermaid_215.txt
new file mode 100644
index 0000000000000000000000000000000000000000..d015141ada6090edace177c45c8c39a36a5d3c12
--- /dev/null
+++ b/test/mermaid/hard/mermaid_215.txt
@@ -0,0 +1,33 @@
+<Canary Releases, connectedTo, Container Orchestration>
+<Canary Releases, connectedTo, Observability Implementation>
+<Cloud Native Development, connectedTo, Dynamic Application Security Testing>
+<Cloud Native Development, partOf, Version Control>
+<Collaboration Tools, connectedTo, Cloud Native Development>
+<Collaboration Tools, partOf, Version Control>
+<Container Orchestration, connectedTo, Environment Management>
+<Container Orchestration, connectedTo, GitOps>
+<Dynamic Application Security Testing, connectedTo, Microservices Architecture>
+<Dynamic Application Security Testing, yes, Container Orchestration>
+<Dynamic Application Security Testing, yes, Post_Mortem Analysis>
+<Environment Management, connectedTo, Alerting and Incident Response>
+<Environment Management, connectedTo, Release Management>
+<GitOps, connectedTo, Serverless Deployment>
+<GitOps, partOf, Version Control>
+<Microservices Architecture, connectedTo, Alerting and Incident Response>
+<Microservices Architecture, connectedTo, Canary Releases>
+<Microservices Architecture, connectedTo, Observability Implementation>
+<Observability Implementation, connectedTo, Alerting and Incident Response>
+<Observability Implementation, connectedTo, Container Orchestration>
+<Observability Implementation, connectedTo, Environment Management>
+<Observability Implementation, no, Environment Management>
+<Post_Mortem Analysis, connectedTo, Environment Management>
+<Post_Mortem Analysis, connectedTo, Microservices Architecture>
+<Release Management, connectedTo, Security in DevOps>
+<Release Management, partOf, Containerization>
+<Security in DevOps, connectedTo, Alerting and Incident Response>
+<Security in DevOps, partOf, Containerization>
+<Serverless Deployment, connectedTo, Collaboration Tools>
+<Serverless Deployment, partOf, Version Control>
+<start, connectedTo, Container Orchestration>
+<start, connectedTo, Dynamic Application Security Testing>
+<start, connectedTo, Microservices Architecture>
diff --git a/test/mermaid/hard/mermaid_216.mmd b/test/mermaid/hard/mermaid_216.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..6a60631b39ec97229fd9c632d43c78fac4face52
--- /dev/null
+++ b/test/mermaid/hard/mermaid_216.mmd
@@ -0,0 +1,150 @@
+graph RL
+    N0([Container Orchestration])
+    N1{Serverless Deployment}
+    N2[/Immutable Infrastructure/]
+    N3([Blue_Green Deployments])
+    N4{Chaos Engineering}
+    N5([Alerting and Incident Response])
+    N6[Code Quality Checks]
+    N7(Version Control)
+    N8([Cost Optimization in Cloud DevOps])
+    N9(Microservices Architecture)
+    N10[Environment Management]
+    N11[Monitoring and Logging]
+    N12(Release Management)
+    N13([Infrastructure Provisioning])
+    N14([Static Code Analysis])
+    N15[(Collaboration Tools)]
+    N16[(Feedback Loops)]
+    N17[(Automated Rollbacks)]
+    N18{Dynamic Application Security Testing}
+    N19([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Rollback Strategies
+        nest0_0[[Cloud Native Development]]
+        nest0_1(Security in DevOps)
+    end
+    subgraph Site Reliability Engineering Principles
+        nest1_0{Configuration Management}
+        nest1_1[/Continuous Delivery/]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> |sends alerts| N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 -.-> |uses GitOps| N16
+    N16 --> N17
+    N17 --> N18
+    N18 --> N19
+    nest0_0 --> nest0_1
+    N17 -.-> nest0_0
+    nest0_1 --> N14
+    nest1_0 -.-> nest1_1
+    N10 -.-> nest1_0
+    nest1_1 -.-> N10
+    N7 --> S0
+    S0 --> N15
+    S0 -.-> |gathers feedback| N11
+    N6 --> S1
+    S1 -.-> N12
+    S1 --> N18
+    S1 --> N13
+    N6 --> S2
+    S2 --> N17
+    S2 --> N12
+    S2 --> N13
+    S2 --> |manages feature flags| N9
+    N6 -.-> |automates tests| M0
+    N8 --> M0
+    M0 --> N13
+    N10 --> |collects metrics| M1
+    N5 -.-> |monitors applications| M1
+    M1 -.-> N12
+    style N0 fill:#F8FDD3,stroke:#D3EB9F
+    style N1 fill:#F8FDD3,stroke:#D3EB9F
+    style N2 fill:#F8FDD3,stroke:#D3EB9F
+    style N3 fill:#F8FDD3,stroke:#D3EB9F
+    style N4 fill:#FFF3E0,stroke:#FFA726
+    style N5 fill:#FFF3E0,stroke:#FFA726
+    style N6 fill:#E8F0EA,stroke:#92C79A
+    style N7 fill:#E8F0EA,stroke:#92C79A
+    style N8 fill:#FFF3E0,stroke:#FFA726
+    style N9 fill:#FFF3E0,stroke:#FFA726
+    style N10 fill:#F8FDD3,stroke:#D3EB9F
+    style N11 fill:#E8F0EA,stroke:#92C79A
+    style N12 fill:#FFF3E0,stroke:#FFA726
+    style N13 fill:#FFF3E0,stroke:#FFA726
+    style N14 fill:#FFF3E0,stroke:#FFA726
+    style N15 fill:#F8FDD3,stroke:#D3EB9F
+    style N16 fill:#E8F0EA,stroke:#92C79A
+    style N17 fill:#FFF3E0,stroke:#FFA726
+    style N18 fill:#F8FDD3,stroke:#D3EB9F
+    style N19 fill:#E8F0EA,stroke:#92C79A
+    style S0 fill:#FFF3E0,stroke:#FFA726
+    style S1 fill:#E8F0EA,stroke:#92C79A
+    style S2 fill:#E8F0EA,stroke:#92C79A
+    style M0 fill:#F8FDD3,stroke:#D3EB9F
+    style M1 fill:#FFF3E0,stroke:#FFA726
+    style nest0_0 fill:#F8FDD3,stroke:#D3EB9F
+    style nest0_1 fill:#E8F0EA,stroke:#92C79A
+    style nest1_0 fill:#E8F0EA,stroke:#92C79A
+    style nest1_1 fill:#E8F0EA,stroke:#92C79A
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#92C79A,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_216.txt b/test/mermaid/hard/mermaid_216.txt
new file mode 100644
index 0000000000000000000000000000000000000000..a8212447321ea98a277aa212e1779deb3e56c5a2
--- /dev/null
+++ b/test/mermaid/hard/mermaid_216.txt
@@ -0,0 +1,40 @@
+<Alerting and Incident Response, monitors applications, Release Management>
+<Alerting and Incident Response, sends alerts, Code Quality Checks>
+<Automated Rollbacks, connectedTo, Cloud Native Development>
+<Automated Rollbacks, connectedTo, Dynamic Application Security Testing>
+<Blue_Green Deployments, connectedTo, Chaos Engineering>
+<Chaos Engineering, connectedTo, Alerting and Incident Response>
+<Cloud Native Development, connectedTo, Security in DevOps>
+<Cloud Native Development, partOf, Rollback Strategies>
+<Code Quality Checks, automates tests, Infrastructure Provisioning>
+<Code Quality Checks, connectedTo, Automated Rollbacks>
+<Code Quality Checks, connectedTo, Dynamic Application Security Testing>
+<Code Quality Checks, connectedTo, Infrastructure Provisioning>
+<Code Quality Checks, connectedTo, Release Management>
+<Code Quality Checks, connectedTo, Version Control>
+<Code Quality Checks, manages feature flags, Microservices Architecture>
+<Collaboration Tools, uses GitOps, Feedback Loops>
+<Configuration Management, connectedTo, Continuous Delivery>
+<Configuration Management, partOf, Site Reliability Engineering Principles>
+<Container Orchestration, connectedTo, Serverless Deployment>
+<Continuous Delivery, connectedTo, Environment Management>
+<Continuous Delivery, partOf, Site Reliability Engineering Principles>
+<Cost Optimization in Cloud DevOps, connectedTo, Infrastructure Provisioning>
+<Cost Optimization in Cloud DevOps, connectedTo, Microservices Architecture>
+<Dynamic Application Security Testing, connectedTo, end>
+<Environment Management, collects metrics, Release Management>
+<Environment Management, connectedTo, Configuration Management>
+<Environment Management, connectedTo, Monitoring and Logging>
+<Feedback Loops, connectedTo, Automated Rollbacks>
+<Immutable Infrastructure, connectedTo, Blue_Green Deployments>
+<Infrastructure Provisioning, connectedTo, Static Code Analysis>
+<Microservices Architecture, connectedTo, Environment Management>
+<Monitoring and Logging, connectedTo, Release Management>
+<Release Management, connectedTo, Infrastructure Provisioning>
+<Security in DevOps, connectedTo, Static Code Analysis>
+<Security in DevOps, partOf, Rollback Strategies>
+<Serverless Deployment, connectedTo, Immutable Infrastructure>
+<Static Code Analysis, connectedTo, Collaboration Tools>
+<Version Control, connectedTo, Collaboration Tools>
+<Version Control, connectedTo, Cost Optimization in Cloud DevOps>
+<Version Control, gathers feedback, Monitoring and Logging>
diff --git a/test/mermaid/hard/mermaid_217.mmd b/test/mermaid/hard/mermaid_217.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..e82650eb948281fce0e46607c4c632b0726114ef
--- /dev/null
+++ b/test/mermaid/hard/mermaid_217.mmd
@@ -0,0 +1,121 @@
+graph RL
+    N0([start])
+    N1[Architecture Planning]
+    N2(Coding)
+    N3[(Performance Optimization)]
+    N4([Scalability Design])
+    N5[(Continuous Integration)]
+    N6(User Interface Design)
+    N7([Deployment])
+    N8[[Embedded Systems Development]]
+    N9[(Operating System Development)]
+    N10{Microservices Architecture}
+    N11{Refactoring}
+    N12(Game Development)
+    N13(System Design)
+    N14[/Database Design/]
+    N15[/Cloud_Native Development/]
+    N16[(Security Hardening)]
+    N17[/API Development/]
+    N18[Maintenance]
+    N19([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Integration Testing
+        nest0_0[Continuous Delivery]
+        nest0_1(Backend Development)
+        nest0_2{Unit Testing}
+    end
+    subgraph Containerization
+        nest1_0{Requirements Gathering}
+        nest1_1[[Version Control]]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    N15 --> N16
+    N16 -.-> N17
+    N17 -.-> |yes| N18
+    N18 -.-> N19
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N6 -.-> nest0_0
+    nest0_2 -.-> N13
+    nest1_0 --> nest1_1
+    N15 -.-> nest1_0
+    nest1_1 --> |no| N14
+    N0 -.-> S0
+    S0 --> N16
+    S0 --> N9
+    S0 --> N18
+    N3 --> S1
+    S1 -.-> N5
+    S1 --> N12
+    S1 -.-> N18
+    N14 --> S2
+    S2 --> N16
+    S2 -.-> N18
+    S2 --> N17
+    N4 -.-> M1
+    N1 --> M1
+    M1 -.-> N6
+    style S0 fill:#E6EE9C,stroke:#CDDC39
+    style S1 fill:#CFD8DC,stroke:#607D8B
+    style S2 fill:#C5CAE9,stroke:#3F51B5
+    style M1 fill:#E6EE9C,stroke:#CDDC39
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#3F51B5,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_217.txt b/test/mermaid/hard/mermaid_217.txt
new file mode 100644
index 0000000000000000000000000000000000000000..af5e3366d1feee4df216e3edc1a79e6453ff69b4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_217.txt
@@ -0,0 +1,42 @@
+<API Development, yes, Maintenance>
+<Architecture Planning, connectedTo, Coding>
+<Architecture Planning, connectedTo, User Interface Design>
+<Backend Development, connectedTo, Unit Testing>
+<Backend Development, partOf, Integration Testing>
+<Cloud_Native Development, connectedTo, Requirements Gathering>
+<Cloud_Native Development, connectedTo, Security Hardening>
+<Coding, connectedTo, Performance Optimization>
+<Continuous Delivery, connectedTo, Backend Development>
+<Continuous Delivery, partOf, Integration Testing>
+<Continuous Integration, connectedTo, User Interface Design>
+<Database Design, connectedTo, API Development>
+<Database Design, connectedTo, Cloud_Native Development>
+<Database Design, connectedTo, Maintenance>
+<Database Design, connectedTo, Security Hardening>
+<Deployment, connectedTo, Embedded Systems Development>
+<Embedded Systems Development, connectedTo, Operating System Development>
+<Game Development, connectedTo, System Design>
+<Maintenance, connectedTo, end>
+<Microservices Architecture, connectedTo, Refactoring>
+<Operating System Development, connectedTo, Microservices Architecture>
+<Performance Optimization, connectedTo, Continuous Integration>
+<Performance Optimization, connectedTo, Game Development>
+<Performance Optimization, connectedTo, Maintenance>
+<Performance Optimization, connectedTo, Scalability Design>
+<Refactoring, connectedTo, Game Development>
+<Requirements Gathering, connectedTo, Version Control>
+<Requirements Gathering, partOf, Containerization>
+<Scalability Design, connectedTo, Continuous Integration>
+<Scalability Design, connectedTo, User Interface Design>
+<Security Hardening, connectedTo, API Development>
+<System Design, connectedTo, Database Design>
+<Unit Testing, connectedTo, System Design>
+<Unit Testing, partOf, Integration Testing>
+<User Interface Design, connectedTo, Continuous Delivery>
+<User Interface Design, connectedTo, Deployment>
+<Version Control, no, Database Design>
+<Version Control, partOf, Containerization>
+<start, connectedTo, Architecture Planning>
+<start, connectedTo, Maintenance>
+<start, connectedTo, Operating System Development>
+<start, connectedTo, Security Hardening>
diff --git a/test/mermaid/hard/mermaid_218.txt b/test/mermaid/hard/mermaid_218.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0c1b05373fa073fd2ae3d95990876169aa5ae5f0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_218.txt
@@ -0,0 +1,38 @@
+<Bug Fixing, connectedTo, Documentation>
+<Code Review, connectedTo, Documentation>
+<Code Review, connectedTo, Frontend Development>
+<Coding, connectedTo, Frontend Development>
+<Coding, connectedTo, Security Hardening>
+<Coding, no, Continuous Delivery>
+<Coding, no, Documentation>
+<Containerization, connectedTo, Code Review>
+<Containerization, connectedTo, Continuous Delivery>
+<Continuous Delivery, connectedTo, Desktop Application Development>
+<Desktop Application Development, connectedTo, Documentation>
+<Desktop Application Development, connectedTo, Scalability Design>
+<Documentation, connectedTo, Unit Testing>
+<Frontend Development, connectedTo, Bug Fixing>
+<Frontend Development, connectedTo, Continuous Delivery>
+<Frontend Development, connectedTo, Documentation>
+<Frontend Development, connectedTo, Scalability Design>
+<Frontend Development, connectedTo, Web Application Development>
+<Game Development, connectedTo, Containerization>
+<Maintenance, connectedTo, Mobile Application Development>
+<Maintenance, partOf, Continuous Integration>
+<Mobile Application Development, connectedTo, Scalability Design>
+<Mobile Application Development, partOf, Continuous Integration>
+<Requirements Gathering, no, System Testing>
+<Requirements Gathering, partOf, Performance Optimization>
+<Scalability Design, connectedTo, Bug Fixing>
+<Scalability Design, connectedTo, Documentation>
+<Scalability Design, connectedTo, Unit Testing>
+<Scalability Design, yes, Web Application Development>
+<Security Hardening, connectedTo, Game Development>
+<Security Hardening, connectedTo, Maintenance>
+<System Testing, partOf, Performance Optimization>
+<System Testing, yes, Containerization>
+<Unit Testing, connectedTo, end>
+<Unit Testing, yes, Requirements Gathering>
+<Web Application Development, connectedTo, Bug Fixing>
+<start, connectedTo, Coding>
+<start, connectedTo, Continuous Delivery>
diff --git a/test/mermaid/hard/mermaid_219.mmd b/test/mermaid/hard/mermaid_219.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..f0c3fbb53c370bc2ae9fdf00fcaba96b82ed6817
--- /dev/null
+++ b/test/mermaid/hard/mermaid_219.mmd
@@ -0,0 +1,106 @@
+graph RL
+    N0([start])
+    N1(User Interface Design)
+    N2(Documentation)
+    N3[/Containerization/]
+    N4[Scalability Design]
+    N5[(Mobile Application Development)]
+    N6(Performance Optimization)
+    N7[System Testing]
+    N8(User Experience Design)
+    N9[/Testing Frameworks/]
+    N10[/Deployment/]
+    N11[Technical Debt Management]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Data Structures Implementation
+        nest0_0[Continuous Delivery]
+        nest0_1(Algorithm Design)
+        nest0_2([API Development])
+        nest0_3(System Design)
+    end
+    subgraph Backend Development
+        nest1_0(Compiler Design)
+        nest1_1(Integration Testing)
+        nest1_2[Version Control]
+        nest1_3([Bug Fixing])
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 -.-> |no| N11
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N5 -.-> nest0_0
+    nest0_3 --> |yes| N8
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> |yes| nest1_3
+    N1 --> nest1_0
+    nest1_3 -.-> N2
+    N2 -.-> S0
+    S0 --> N5
+    S0 -.-> N8
+    S0 -.-> N4
+    N3 --> S1
+    S1 -.-> N7
+    S1 --> N11
+    S1 -.-> N9
+    N0 -.-> M0
+    N2 --> M0
+    M0 --> N4
+    N6 --> M1
+    N1 -.-> M1
+    N8 --> M1
+    M1 --> N11
+    style S0 fill:#F2E6F5,stroke:#CB9BE1
+    style S1 fill:#E0F7FA,stroke:#00BCD4
+    style M0 fill:#F2E6F5,stroke:#CB9BE1
+    style M1 fill:#E0F7FA,stroke:#00BCD4
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#CB9BE1,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_219.txt b/test/mermaid/hard/mermaid_219.txt
new file mode 100644
index 0000000000000000000000000000000000000000..bd9b5bf63fb608aa5f93fcaacb678c9c7f9bb4ed
--- /dev/null
+++ b/test/mermaid/hard/mermaid_219.txt
@@ -0,0 +1,39 @@
+<API Development, connectedTo, System Design>
+<API Development, partOf, Data Structures Implementation>
+<Algorithm Design, connectedTo, API Development>
+<Algorithm Design, partOf, Data Structures Implementation>
+<Bug Fixing, connectedTo, Documentation>
+<Bug Fixing, partOf, Backend Development>
+<Compiler Design, connectedTo, Integration Testing>
+<Compiler Design, partOf, Backend Development>
+<Containerization, connectedTo, Scalability Design>
+<Containerization, connectedTo, System Testing>
+<Containerization, connectedTo, Technical Debt Management>
+<Containerization, connectedTo, Testing Frameworks>
+<Continuous Delivery, connectedTo, Algorithm Design>
+<Continuous Delivery, partOf, Data Structures Implementation>
+<Deployment, no, Technical Debt Management>
+<Documentation, connectedTo, Containerization>
+<Documentation, connectedTo, Mobile Application Development>
+<Documentation, connectedTo, Scalability Design>
+<Documentation, connectedTo, User Experience Design>
+<Integration Testing, connectedTo, Version Control>
+<Integration Testing, partOf, Backend Development>
+<Mobile Application Development, connectedTo, Continuous Delivery>
+<Mobile Application Development, connectedTo, Performance Optimization>
+<Performance Optimization, connectedTo, System Testing>
+<Performance Optimization, connectedTo, Technical Debt Management>
+<Scalability Design, connectedTo, Mobile Application Development>
+<System Design, partOf, Data Structures Implementation>
+<System Design, yes, User Experience Design>
+<System Testing, connectedTo, User Experience Design>
+<Testing Frameworks, connectedTo, Deployment>
+<User Experience Design, connectedTo, Technical Debt Management>
+<User Experience Design, connectedTo, Testing Frameworks>
+<User Interface Design, connectedTo, Compiler Design>
+<User Interface Design, connectedTo, Documentation>
+<User Interface Design, connectedTo, Technical Debt Management>
+<Version Control, partOf, Backend Development>
+<Version Control, yes, Bug Fixing>
+<start, connectedTo, Scalability Design>
+<start, connectedTo, User Interface Design>
diff --git a/test/mermaid/hard/mermaid_22.mmd b/test/mermaid/hard/mermaid_22.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..4a8e7f84cf7b339d1fbdb1e8385ec65596ee4751
--- /dev/null
+++ b/test/mermaid/hard/mermaid_22.mmd
@@ -0,0 +1,126 @@
+graph LR
+    N0([Estate Planning])
+    N1[[Patent Application]]
+    N2[/Bail Hearing/]
+    N3[(Trademark Registration)]
+    N4[Arbitration Session]
+    N5[[Pre_Trial Hearing]]
+    N6[[Court Order Execution]]
+    N7([Enforcement])
+    N8{Closing Argument}
+    N9(Corporate Formation)
+    N10[[Legal Aid Assistance]]
+    N11{Judgment Writing}
+    N12[[Client Interview]]
+    N13(Immigration Petition)
+    N14([Due Diligence])
+    N15[Document Drafting]
+    N16([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    subgraph Amicus Brief Submission
+        nest0_0([Notarization])
+        nest0_1([Legal Consultation])
+        nest0_2(Divorce Proceedings)
+    end
+    subgraph Appeal Submission
+        nest1_0{Bankruptcy Filing}
+        nest1_1(Intel Property Licensing)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> |certifies| N14
+    N14 -.-> N15
+    N15 -.-> N16
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N1 -.-> nest0_0
+    nest0_2 -.-> N11
+    nest1_0 -.-> nest1_1
+    N6 --> nest1_0
+    nest1_1 -.-> N14
+    N13 --> S0
+    S0 --> N16
+    S0 --> N15
+    N3 --> S1
+    S1 --> N13
+    S1 -.-> N8
+    S1 -.-> N9
+    S1 -.-> N14
+    N10 -.-> M0
+    N2 --> M0
+    N1 --> M0
+    M0 -.-> N13
+    style N0 fill:#DFE7EB,stroke:#B0C5CD
+    style N1 fill:#DFE7EB,stroke:#B0C5CD
+    style N2 fill:#D1C4E9,stroke:#7E57C2
+    style N3 fill:#DFE7EB,stroke:#B0C5CD
+    style N4 fill:#D1C4E9,stroke:#7E57C2
+    style N5 fill:#DFE7EB,stroke:#B0C5CD
+    style N6 fill:#FFDCD6,stroke:#FFB2A5
+    style N7 fill:#D1C4E9,stroke:#7E57C2
+    style N8 fill:#DFE7EB,stroke:#B0C5CD
+    style N9 fill:#FFDCD6,stroke:#FFB2A5
+    style N10 fill:#DFE7EB,stroke:#B0C5CD
+    style N11 fill:#D1C4E9,stroke:#7E57C2
+    style N12 fill:#DFE7EB,stroke:#B0C5CD
+    style N13 fill:#FFDCD6,stroke:#FFB2A5
+    style N14 fill:#FFDCD6,stroke:#FFB2A5
+    style N15 fill:#D1C4E9,stroke:#7E57C2
+    style N16 fill:#DFE7EB,stroke:#B0C5CD
+    style S0 fill:#D1C4E9,stroke:#7E57C2
+    style S1 fill:#FFDCD6,stroke:#FFB2A5
+    style M0 fill:#DFE7EB,stroke:#B0C5CD
+    style nest0_0 fill:#D1C4E9,stroke:#7E57C2
+    style nest0_1 fill:#FFDCD6,stroke:#FFB2A5
+    style nest0_2 fill:#D1C4E9,stroke:#7E57C2
+    style nest1_0 fill:#FFDCD6,stroke:#FFB2A5
+    style nest1_1 fill:#D1C4E9,stroke:#7E57C2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_22.txt b/test/mermaid/hard/mermaid_22.txt
new file mode 100644
index 0000000000000000000000000000000000000000..8c6c55c4b7ce9128b0f4c064fa62b3d6418fe234
--- /dev/null
+++ b/test/mermaid/hard/mermaid_22.txt
@@ -0,0 +1,37 @@
+<Arbitration Session, connectedTo, Pre_Trial Hearing>
+<Bail Hearing, connectedTo, Immigration Petition>
+<Bail Hearing, connectedTo, Trademark Registration>
+<Bankruptcy Filing, connectedTo, Intel Property Licensing>
+<Bankruptcy Filing, partOf, Appeal Submission>
+<Client Interview, connectedTo, Immigration Petition>
+<Closing Argument, connectedTo, Corporate Formation>
+<Corporate Formation, connectedTo, Legal Aid Assistance>
+<Court Order Execution, connectedTo, Bankruptcy Filing>
+<Court Order Execution, connectedTo, Enforcement>
+<Divorce Proceedings, connectedTo, Judgment Writing>
+<Divorce Proceedings, partOf, Amicus Brief Submission>
+<Document Drafting, connectedTo, end>
+<Due Diligence, connectedTo, Document Drafting>
+<Enforcement, connectedTo, Closing Argument>
+<Estate Planning, connectedTo, Patent Application>
+<Immigration Petition, certifies, Due Diligence>
+<Immigration Petition, connectedTo, Document Drafting>
+<Immigration Petition, connectedTo, end>
+<Intel Property Licensing, connectedTo, Due Diligence>
+<Intel Property Licensing, partOf, Appeal Submission>
+<Judgment Writing, connectedTo, Client Interview>
+<Legal Aid Assistance, connectedTo, Immigration Petition>
+<Legal Aid Assistance, connectedTo, Judgment Writing>
+<Legal Consultation, connectedTo, Divorce Proceedings>
+<Legal Consultation, partOf, Amicus Brief Submission>
+<Notarization, connectedTo, Legal Consultation>
+<Notarization, partOf, Amicus Brief Submission>
+<Patent Application, connectedTo, Bail Hearing>
+<Patent Application, connectedTo, Immigration Petition>
+<Patent Application, connectedTo, Notarization>
+<Pre_Trial Hearing, connectedTo, Court Order Execution>
+<Trademark Registration, connectedTo, Arbitration Session>
+<Trademark Registration, connectedTo, Closing Argument>
+<Trademark Registration, connectedTo, Corporate Formation>
+<Trademark Registration, connectedTo, Due Diligence>
+<Trademark Registration, connectedTo, Immigration Petition>
diff --git a/test/mermaid/hard/mermaid_220.mmd b/test/mermaid/hard/mermaid_220.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..0e954b5261fc4c643d0db6f97661f1a82575008a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_220.mmd
@@ -0,0 +1,91 @@
+graph RL
+    N0([start])
+    N1[Mechanical Design Integration]
+    N2[Manufacturing Process Planning]
+    N3([Troubleshooting and Debugging])
+    N4{Signal Integrity Analysis}
+    N5([Mixed_Signal Design])
+    N6(ASIC Design)
+    N7[(Intellectual Property Protection)]
+    N8[[Schematic Capture]]
+    N9{Microcontroller Programming}
+    N10[Material Selection]
+    N11(PCB Layout)
+    N12(Regulatory Compliance)
+    N13(Prototyping)
+    N14([end])
+    S0(( ))
+    S1(( ))
+    M1(( ))
+    subgraph Assembly Line Optimization
+        nest0_0{Power Management Design}
+        nest0_1[Low_Power Design]
+    end
+    subgraph Circuit Design
+        nest1_0(Documentation)
+        nest1_1[/Optical Module Design/]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> |no| N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 --> |yes| N12
+    N12 --> N13
+    N13 --> N14
+    nest0_0 -.-> nest0_1
+    N2 -.-> nest0_0
+    nest0_1 --> N2
+    nest1_0 --> nest1_1
+    N1 -.-> nest1_0
+    nest1_1 -.-> N12
+    N11 --> S0
+    S0 -.-> N13
+    S0 -.-> N14
+    N10 -.-> S1
+    S1 --> N13
+    S1 --> N14
+    S1 --> N12
+    N6 -.-> M1
+    N0 -.-> M1
+    M1 -.-> N8
+    style S0 fill:#EBEBEB,stroke:#E0E0E0
+    style S1 fill:#FFDCD6,stroke:#FFB2A5
+    style M1 fill:#CFD8DC,stroke:#607D8B
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_220.txt b/test/mermaid/hard/mermaid_220.txt
new file mode 100644
index 0000000000000000000000000000000000000000..91d5e8ee7e1e769a8e1cd5ee81a449cd330cdfad
--- /dev/null
+++ b/test/mermaid/hard/mermaid_220.txt
@@ -0,0 +1,31 @@
+<ASIC Design, connectedTo, Intellectual Property Protection>
+<ASIC Design, connectedTo, Schematic Capture>
+<Documentation, connectedTo, Optical Module Design>
+<Documentation, partOf, Circuit Design>
+<Intellectual Property Protection, no, Schematic Capture>
+<Low_Power Design, connectedTo, Manufacturing Process Planning>
+<Low_Power Design, partOf, Assembly Line Optimization>
+<Manufacturing Process Planning, connectedTo, Power Management Design>
+<Manufacturing Process Planning, connectedTo, Troubleshooting and Debugging>
+<Material Selection, connectedTo, PCB Layout>
+<Material Selection, connectedTo, Prototyping>
+<Material Selection, connectedTo, Regulatory Compliance>
+<Material Selection, connectedTo, end>
+<Mechanical Design Integration, connectedTo, Documentation>
+<Mechanical Design Integration, connectedTo, Manufacturing Process Planning>
+<Microcontroller Programming, connectedTo, Material Selection>
+<Mixed_Signal Design, connectedTo, ASIC Design>
+<Optical Module Design, connectedTo, Regulatory Compliance>
+<Optical Module Design, partOf, Circuit Design>
+<PCB Layout, connectedTo, Prototyping>
+<PCB Layout, connectedTo, end>
+<PCB Layout, yes, Regulatory Compliance>
+<Power Management Design, connectedTo, Low_Power Design>
+<Power Management Design, partOf, Assembly Line Optimization>
+<Prototyping, connectedTo, end>
+<Regulatory Compliance, connectedTo, Prototyping>
+<Schematic Capture, connectedTo, Microcontroller Programming>
+<Signal Integrity Analysis, connectedTo, Mixed_Signal Design>
+<Troubleshooting and Debugging, connectedTo, Signal Integrity Analysis>
+<start, connectedTo, Mechanical Design Integration>
+<start, connectedTo, Schematic Capture>
diff --git a/test/mermaid/hard/mermaid_221.mmd b/test/mermaid/hard/mermaid_221.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..c9474fc3c469d9aa2d11fff163d2f2f21e794e51
--- /dev/null
+++ b/test/mermaid/hard/mermaid_221.mmd
@@ -0,0 +1,136 @@
+graph RL
+    N0([High_Speed Digital Design])
+    N1[Manufacturing Process Planning]
+    N2[Power Integrity Analysis]
+    N3([Firmware Development])
+    N4(ASIC Design)
+    N5[[Supply Chain Management for Components]]
+    N6([Circuit Design])
+    N7(RF Circuit Design)
+    N8(PCB Layout)
+    N9(Environmental Testing)
+    N10[[Low_Power Design]]
+    N11[Mixed_Signal Design]
+    N12[(Mechanical Design Integration)]
+    N13[Actuator Control]
+    N14[(Reverse Engineering)]
+    N15([Signal Integrity Analysis])
+    N16[Schematic Capture]
+    N17{Power Management Design}
+    N18([Optical Module Design])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    subgraph Component Selection
+        nest0_0(Thermal Management)
+        nest0_1[[Troubleshooting and Debugging]]
+        nest0_2([Reliability Testing])
+    end
+    subgraph FPGA Design
+        nest1_0(Material Selection)
+        nest1_1[Failure Analysis]
+    end
+    N0 -.-> |optimizes costs| N1
+    N1 --> |ensures reliability| N2
+    N2 --> N3
+    N3 --> |optimizes power delivery| N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> |ensures compliance| N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> |designs fixtures| N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    N15 -.-> N16
+    N16 -.-> N17
+    N17 --> N18
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N14 -.-> nest0_0
+    nest0_2 --> N11
+    nest1_0 --> nest1_1
+    N11 -.-> nest1_0
+    nest1_1 --> N9
+    N13 -.-> S0
+    S0 -.-> |creates schematics| N16
+    S0 -.-> N17
+    N6 -.-> S1
+    S1 --> N9
+    S1 --> N11
+    N13 -.-> S2
+    S2 -.-> N17
+    S2 -.-> N15
+    N3 --> M0
+    N10 --> M0
+    M0 -.-> N12
+    style N0 fill:#B3E5FC,stroke:#03A9F4
+    style N1 fill:#ECCFF5,stroke:#CD8FF2
+    style N2 fill:#ECCFF5,stroke:#CD8FF2
+    style N3 fill:#FFDCD6,stroke:#FFB2A5
+    style N4 fill:#FFDCD6,stroke:#FFB2A5
+    style N5 fill:#B3E5FC,stroke:#03A9F4
+    style N6 fill:#ECCFF5,stroke:#CD8FF2
+    style N7 fill:#FFDCD6,stroke:#FFB2A5
+    style N8 fill:#FFDCD6,stroke:#FFB2A5
+    style N9 fill:#ECCFF5,stroke:#CD8FF2
+    style N10 fill:#B3E5FC,stroke:#03A9F4
+    style N11 fill:#FFDCD6,stroke:#FFB2A5
+    style N12 fill:#B3E5FC,stroke:#03A9F4
+    style N13 fill:#ECCFF5,stroke:#CD8FF2
+    style N14 fill:#FFDCD6,stroke:#FFB2A5
+    style N15 fill:#B3E5FC,stroke:#03A9F4
+    style N16 fill:#FFDCD6,stroke:#FFB2A5
+    style N17 fill:#ECCFF5,stroke:#CD8FF2
+    style N18 fill:#B3E5FC,stroke:#03A9F4
+    style S0 fill:#ECCFF5,stroke:#CD8FF2
+    style S1 fill:#ECCFF5,stroke:#CD8FF2
+    style S2 fill:#FFDCD6,stroke:#FFB2A5
+    style M0 fill:#B3E5FC,stroke:#03A9F4
+    style nest0_0 fill:#B3E5FC,stroke:#03A9F4
+    style nest0_1 fill:#ECCFF5,stroke:#CD8FF2
+    style nest0_2 fill:#ECCFF5,stroke:#CD8FF2
+    style nest1_0 fill:#FFDCD6,stroke:#FFB2A5
+    style nest1_1 fill:#ECCFF5,stroke:#CD8FF2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFB2A5,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_222.mmd b/test/mermaid/hard/mermaid_222.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..923df234d221d6da9eed2eb3ac736a8ddd71f013
--- /dev/null
+++ b/test/mermaid/hard/mermaid_222.mmd
@@ -0,0 +1,120 @@
+graph BT
+    N0([start])
+    N1[[Troubleshooting and Debugging]]
+    N2[(Test Fixture Design)]
+    N3[Component Selection]
+    N4(Material Selection)
+    N5([Supply Chain Management for Components])
+    N6(Electromagnetic Compatibility Testing)
+    N7[FPGA Design]
+    N8(Manufacturing Process Planning)
+    N9{Low_Power Design}
+    N10(Enclosure Design)
+    N11[Cost Optimization]
+    N12[[Prototyping]]
+    N13[(Microcontroller Programming)]
+    N14[[Reliability Testing]]
+    N15([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    subgraph Signal Integrity Analysis
+        nest0_0[RF Circuit Design]
+        nest0_1(Failure Analysis)
+    end
+    subgraph Power Integrity Analysis
+        nest1_0[(Mechanical Design Integration)]
+        nest1_1[(Quality Control)]
+        nest1_2{High_Speed Digital Design}
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> |integrates sensors| N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 --> N15
+    nest0_0 -.-> nest0_1
+    N6 --> nest0_0
+    nest0_1 -.-> |controls actuators| N15
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> |designs mixed_signal| nest1_2
+    N8 -.-> nest1_0
+    nest1_2 --> N8
+    N7 --> S0
+    S0 --> N9
+    S0 -.-> N14
+    S0 -.-> N10
+    N2 -.-> S1
+    S1 -.-> N6
+    S1 --> N11
+    N4 -.-> S2
+    S2 --> N9
+    S2 -.-> |optimizes for low power| N12
+    S2 -.-> N8
+    style N0 fill:#F8FDD3,stroke:#D3EB9F
+    style N1 fill:#ECEFF1,stroke:#90A4AE
+    style N2 fill:#FFCCBC,stroke:#FF5722
+    style N3 fill:#FFCCBC,stroke:#FF5722
+    style N4 fill:#FFCCBC,stroke:#FF5722
+    style N5 fill:#ECEFF1,stroke:#90A4AE
+    style N6 fill:#F8FDD3,stroke:#D3EB9F
+    style N7 fill:#F8FDD3,stroke:#D3EB9F
+    style N8 fill:#F8FDD3,stroke:#D3EB9F
+    style N9 fill:#ECEFF1,stroke:#90A4AE
+    style N10 fill:#FFCCBC,stroke:#FF5722
+    style N11 fill:#FFCCBC,stroke:#FF5722
+    style N12 fill:#F8FDD3,stroke:#D3EB9F
+    style N13 fill:#F8FDD3,stroke:#D3EB9F
+    style N14 fill:#FFCCBC,stroke:#FF5722
+    style N15 fill:#FFCCBC,stroke:#FF5722
+    style S0 fill:#ECEFF1,stroke:#90A4AE
+    style S1 fill:#F8FDD3,stroke:#D3EB9F
+    style S2 fill:#ECEFF1,stroke:#90A4AE
+    style nest0_0 fill:#FFCCBC,stroke:#FF5722
+    style nest0_1 fill:#FFCCBC,stroke:#FF5722
+    style nest1_0 fill:#FFCCBC,stroke:#FF5722
+    style nest1_1 fill:#F8FDD3,stroke:#D3EB9F
+    style nest1_2 fill:#F8FDD3,stroke:#D3EB9F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FF5722,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_223.mmd b/test/mermaid/hard/mermaid_223.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..f730474415114f9ae1818202661105a05ce80afa
--- /dev/null
+++ b/test/mermaid/hard/mermaid_223.mmd
@@ -0,0 +1,140 @@
+graph LR
+    N0([start])
+    N1(Crash Reporting)
+    N2([Security Implementation])
+    N3(Deep Linking)
+    N4[/Widget Development/]
+    N5[Database Design for Mobile]
+    N6(Real_time Communication Features)
+    N7{Cloud Backend for Mobile}
+    N8(Backend Integration)
+    N9[Concept Development]
+    N10[/Microphone Integration/]
+    N11[[Deployment to App Stores]]
+    N12([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Offline Mode Development
+        nest0_0[/Camera Integration/]
+        nest0_1([User Feedback Collection])
+        nest0_2[/User Onboarding Flows/]
+        nest0_3[Native App Development]
+    end
+    subgraph In_App Purchase Integration
+        nest1_0([App Store Optimization])
+        nest1_1[User Interface Design]
+    end
+    N0 -.-> |builds backends| N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> |monitors crashes| N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    nest0_0 --> nest0_1
+    nest0_1 --> |implements biometrics| nest0_2
+    nest0_2 --> nest0_3
+    N1 -.-> nest0_0
+    nest0_3 -.-> N3
+    nest1_0 --> nest1_1
+    N1 --> nest1_0
+    nest1_1 --> N1
+    N0 --> S0
+    S0 -.-> N12
+    S0 --> |processes payments| N4
+    S0 -.-> N3
+    S0 --> N10
+    N3 --> S1
+    S1 -.-> N8
+    S1 --> N7
+    N2 -.-> S2
+    S2 --> N12
+    S2 --> N5
+    S2 -.-> |integrates wearables| N4
+    S2 -.-> N7
+    N1 --> M0
+    N2 -.-> M0
+    M0 --> N4
+    N2 --> M1
+    N1 -.-> M1
+    M1 -.-> N4
+    N4 -.-> M2
+    N5 --> M2
+    M2 --> N7
+    style N0 fill:#D0E0F8,stroke:#4285F4
+    style N1 fill:#FFFAE0,stroke:#FFE470
+    style N2 fill:#FFFAE0,stroke:#FFE470
+    style N3 fill:#FFFAE0,stroke:#FFE470
+    style N4 fill:#C5CAE9,stroke:#3F51B5
+    style N5 fill:#FFFAE0,stroke:#FFE470
+    style N6 fill:#C5CAE9,stroke:#3F51B5
+    style N7 fill:#FFFAE0,stroke:#FFE470
+    style N8 fill:#D0E0F8,stroke:#4285F4
+    style N9 fill:#FFFAE0,stroke:#FFE470
+    style N10 fill:#D0E0F8,stroke:#4285F4
+    style N11 fill:#D0E0F8,stroke:#4285F4
+    style N12 fill:#C5CAE9,stroke:#3F51B5
+    style S0 fill:#D0E0F8,stroke:#4285F4
+    style S1 fill:#D0E0F8,stroke:#4285F4
+    style S2 fill:#D0E0F8,stroke:#4285F4
+    style M0 fill:#C5CAE9,stroke:#3F51B5
+    style M1 fill:#C5CAE9,stroke:#3F51B5
+    style M2 fill:#D0E0F8,stroke:#4285F4
+    style nest0_0 fill:#D0E0F8,stroke:#4285F4
+    style nest0_1 fill:#C5CAE9,stroke:#3F51B5
+    style nest0_2 fill:#C5CAE9,stroke:#3F51B5
+    style nest0_3 fill:#FFFAE0,stroke:#FFE470
+    style nest1_0 fill:#C5CAE9,stroke:#3F51B5
+    style nest1_1 fill:#D0E0F8,stroke:#4285F4
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#4285F4,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_223.txt b/test/mermaid/hard/mermaid_223.txt
new file mode 100644
index 0000000000000000000000000000000000000000..94f0349c745f2f88d5644e776020dc128f43fdc7
--- /dev/null
+++ b/test/mermaid/hard/mermaid_223.txt
@@ -0,0 +1,40 @@
+<App Store Optimization, connectedTo, User Interface Design>
+<App Store Optimization, partOf, In_App Purchase Integration>
+<Backend Integration, connectedTo, Concept Development>
+<Camera Integration, connectedTo, User Feedback Collection>
+<Camera Integration, partOf, Offline Mode Development>
+<Cloud Backend for Mobile, monitors crashes, Backend Integration>
+<Concept Development, connectedTo, Microphone Integration>
+<Crash Reporting, connectedTo, App Store Optimization>
+<Crash Reporting, connectedTo, Camera Integration>
+<Crash Reporting, connectedTo, Security Implementation>
+<Crash Reporting, connectedTo, Widget Development>
+<Database Design for Mobile, connectedTo, Cloud Backend for Mobile>
+<Database Design for Mobile, connectedTo, Real_time Communication Features>
+<Deep Linking, connectedTo, Backend Integration>
+<Deep Linking, connectedTo, Cloud Backend for Mobile>
+<Deep Linking, connectedTo, Widget Development>
+<Deployment to App Stores, connectedTo, end>
+<Microphone Integration, connectedTo, Deployment to App Stores>
+<Native App Development, connectedTo, Deep Linking>
+<Native App Development, partOf, Offline Mode Development>
+<Real_time Communication Features, connectedTo, Cloud Backend for Mobile>
+<Security Implementation, connectedTo, Cloud Backend for Mobile>
+<Security Implementation, connectedTo, Database Design for Mobile>
+<Security Implementation, connectedTo, Deep Linking>
+<Security Implementation, connectedTo, Widget Development>
+<Security Implementation, connectedTo, end>
+<Security Implementation, integrates wearables, Widget Development>
+<User Feedback Collection, implements biometrics, User Onboarding Flows>
+<User Feedback Collection, partOf, Offline Mode Development>
+<User Interface Design, connectedTo, Crash Reporting>
+<User Interface Design, partOf, In_App Purchase Integration>
+<User Onboarding Flows, connectedTo, Native App Development>
+<User Onboarding Flows, partOf, Offline Mode Development>
+<Widget Development, connectedTo, Cloud Backend for Mobile>
+<Widget Development, connectedTo, Database Design for Mobile>
+<start, builds backends, Crash Reporting>
+<start, connectedTo, Deep Linking>
+<start, connectedTo, Microphone Integration>
+<start, connectedTo, end>
+<start, processes payments, Widget Development>
diff --git a/test/mermaid/hard/mermaid_224.txt b/test/mermaid/hard/mermaid_224.txt
new file mode 100644
index 0000000000000000000000000000000000000000..909063d304631d3ef9be2947058b01125c802607
--- /dev/null
+++ b/test/mermaid/hard/mermaid_224.txt
@@ -0,0 +1,37 @@
+<API Development, connectedTo, Backend Integration>
+<API Development, partOf, Crash Reporting>
+<Accessibility Features, connectedTo, IoT Device Control via App>
+<Accessibility Features, connectedTo, Subscription Management>
+<Accessibility Features, connectedTo, Testing and Debugging>
+<Backend Integration, connectedTo, Concept Development>
+<Backend Integration, partOf, Crash Reporting>
+<Camera Integration, connectedTo, Subscription Management>
+<Chat Functionality, connectedTo, IoT Device Control via App>
+<Cloud Backend for Mobile, connectedTo, Wearable Device Integration>
+<Cloud Backend for Mobile, partOf, Analytics Tracking>
+<Concept Development, connectedTo, Camera Integration>
+<Deep Linking, connectedTo, Accessibility Features>
+<Deep Linking, connectedTo, IoT Device Control via App>
+<Deep Linking, connectedTo, Testing and Debugging>
+<Geolocation Services, connectedTo, Deep Linking>
+<Geolocation Services, connectedTo, IoT Device Control via App>
+<Geolocation Services, connectedTo, Real_time Communication Features>
+<Geolocation Services, connectedTo, Security Implementation>
+<Geolocation Services, connectedTo, Testing and Debugging>
+<Geolocation Services, enables offline access, Accessibility Features>
+<IoT Device Control via App, connectedTo, Real_time Communication Features>
+<Microphone Integration, connectedTo, Subscription Management>
+<Microphone Integration, connectedTo, Widget Development>
+<Offline Mode Development, connectedTo, Chat Functionality>
+<Prototyping, connectedTo, API Development>
+<Prototyping, connectedTo, Offline Mode Development>
+<Real_time Communication Features, connectedTo, Performance Optimization>
+<Security Implementation, connectedTo, Prototyping>
+<Subscription Management, connectedTo, Cloud Backend for Mobile>
+<Subscription Management, connectedTo, Security Implementation>
+<Testing and Debugging, connectedTo, IoT Device Control via App>
+<Testing and Debugging, implements biometrics, Concept Development>
+<Wearable Device Integration, partOf, Analytics Tracking>
+<Wearable Device Integration, uses microphone, Security Implementation>
+<Widget Development, connectedTo, Geolocation Services>
+<Widget Development, connectedTo, IoT Device Control via App>
diff --git a/test/mermaid/hard/mermaid_225.mmd b/test/mermaid/hard/mermaid_225.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..11cf746db9eabb31438c7d2d1c8fe74e7270c2b7
--- /dev/null
+++ b/test/mermaid/hard/mermaid_225.mmd
@@ -0,0 +1,85 @@
+graph BT
+    N0([start])
+    N1[[Gamification Elements]]
+    N2(Security Implementation)
+    N3(In_App Purchase Integration)
+    N4[Accessibility Features]
+    N5([Wearable Device Integration])
+    N6[Subscription Management]
+    N7[[Cross_Platform Development]]
+    N8[[Native App Development]]
+    S0(( ))
+    S1(( ))
+    M2(( ))
+    subgraph AR or VR Features in Mobile
+        nest0_0(Backend Integration)
+        nest0_1([Ad Monetization])
+        nest0_2[[Payment Gateway Integration]]
+    end
+    subgraph User Feedback Collection
+        nest1_0[Crash Reporting]
+        nest1_1[Biometric Authentication]
+        nest1_2[[Updates and Maintenance]]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N3 --> nest0_0
+    nest0_2 --> |no| N4
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N2 --> nest1_0
+    nest1_2 -.-> N2
+    N2 --> S0
+    S0 -.-> N8
+    S0 --> N7
+    S0 -.-> N5
+    N4 -.-> S1
+    S1 -.-> N6
+    S1 -.-> N7
+    S1 --> N8
+    N5 --> M2
+    N3 --> M2
+    N0 --> M2
+    N2 -.-> |yes| M2
+    M2 --> N8
+    style S0 fill:#FFF0CC,stroke:#FFCC80
+    style S1 fill:#FFF0CC,stroke:#FFCC80
+    style M2 fill:#F0F0F0,stroke:#D2D2D2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#DCE775,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_225.txt b/test/mermaid/hard/mermaid_225.txt
new file mode 100644
index 0000000000000000000000000000000000000000..a9a64e175dcb606062093d3ef72be5efaa811e8c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_225.txt
@@ -0,0 +1,32 @@
+<Accessibility Features, connectedTo, Cross_Platform Development>
+<Accessibility Features, connectedTo, Native App Development>
+<Accessibility Features, connectedTo, Subscription Management>
+<Accessibility Features, connectedTo, Wearable Device Integration>
+<Ad Monetization, connectedTo, Payment Gateway Integration>
+<Ad Monetization, partOf, AR or VR Features in Mobile>
+<Backend Integration, connectedTo, Ad Monetization>
+<Backend Integration, partOf, AR or VR Features in Mobile>
+<Biometric Authentication, connectedTo, Updates and Maintenance>
+<Biometric Authentication, partOf, User Feedback Collection>
+<Crash Reporting, connectedTo, Biometric Authentication>
+<Crash Reporting, partOf, User Feedback Collection>
+<Cross_Platform Development, connectedTo, Native App Development>
+<Gamification Elements, connectedTo, Security Implementation>
+<In_App Purchase Integration, connectedTo, Accessibility Features>
+<In_App Purchase Integration, connectedTo, Backend Integration>
+<In_App Purchase Integration, connectedTo, Native App Development>
+<Payment Gateway Integration, no, Accessibility Features>
+<Payment Gateway Integration, partOf, AR or VR Features in Mobile>
+<Security Implementation, connectedTo, Crash Reporting>
+<Security Implementation, connectedTo, Cross_Platform Development>
+<Security Implementation, connectedTo, In_App Purchase Integration>
+<Security Implementation, connectedTo, Native App Development>
+<Security Implementation, connectedTo, Wearable Device Integration>
+<Security Implementation, yes, Native App Development>
+<Subscription Management, connectedTo, Cross_Platform Development>
+<Updates and Maintenance, connectedTo, Security Implementation>
+<Updates and Maintenance, partOf, User Feedback Collection>
+<Wearable Device Integration, connectedTo, Native App Development>
+<Wearable Device Integration, connectedTo, Subscription Management>
+<start, connectedTo, Gamification Elements>
+<start, connectedTo, Native App Development>
diff --git a/test/mermaid/hard/mermaid_226.mmd b/test/mermaid/hard/mermaid_226.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..b4bd11fd53bacfdb120cb232810d856cba900471
--- /dev/null
+++ b/test/mermaid/hard/mermaid_226.mmd
@@ -0,0 +1,134 @@
+graph LR
+    N0([start])
+    N1(Personal Branding on Social Media)
+    N2[/Trend Monitoring/]
+    N3[Platform Algorithm Understanding]
+    N4(Content Moderation)
+    N5[Reach and Impressions Tracking]
+    N6[Reputation Management]
+    N7(Customer Service on Social Media)
+    N8([Performance Analytics])
+    N9{Platform Selection}
+    N10[(Reels or Short Video Production)]
+    N11(Content Strategy)
+    N12(Story Format Content Creation)
+    N13[Competitor Analysis]
+    N14([Audience Engagement])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Engagement Rate Calculation
+        nest0_0[/Social Listening/]
+        nest0_1[Live Streaming on Social Media]
+        nest0_2(Campaign Management)
+    end
+    subgraph Influencer Collaboration
+        nest1_0[Group Management]
+        nest1_1[[Social Selling]]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 --> N14
+    nest0_0 --> nest0_1
+    nest0_1 -.-> |schedules posts| nest0_2
+    N12 -.-> nest0_0
+    nest0_2 --> N7
+    nest1_0 -.-> nest1_1
+    N4 -.-> nest1_0
+    nest1_1 -.-> N8
+    N6 --> S0
+    S0 -.-> N13
+    S0 -.-> N12
+    S0 --> N14
+    N7 -.-> S1
+    S1 -.-> N12
+    S1 -.-> N9
+    S1 -.-> N13
+    N2 -.-> M0
+    N8 -.-> M0
+    N6 --> M0
+    M0 --> N10
+    N2 -.-> M1
+    N1 --> M1
+    M1 -.-> N5
+    N1 -.-> M2
+    N0 -.-> |considers ethics| M2
+    M2 -.-> N3
+    style N0 fill:#F6F6F6,stroke:#CFCFCF
+    style N1 fill:#F1F8FF,stroke:#42A5F5
+    style N2 fill:#F1F8FF,stroke:#42A5F5
+    style N3 fill:#F6F6F6,stroke:#CFCFCF
+    style N4 fill:#F6F6F6,stroke:#CFCFCF
+    style N5 fill:#F6F6F6,stroke:#CFCFCF
+    style N6 fill:#F6F6F6,stroke:#CFCFCF
+    style N7 fill:#F6F6F6,stroke:#CFCFCF
+    style N8 fill:#F1F8FF,stroke:#42A5F5
+    style N9 fill:#D7CCC8,stroke:#795548
+    style N10 fill:#F1F8FF,stroke:#42A5F5
+    style N11 fill:#F1F8FF,stroke:#42A5F5
+    style N12 fill:#F1F8FF,stroke:#42A5F5
+    style N13 fill:#F6F6F6,stroke:#CFCFCF
+    style N14 fill:#F1F8FF,stroke:#42A5F5
+    style S0 fill:#F6F6F6,stroke:#CFCFCF
+    style S1 fill:#D7CCC8,stroke:#795548
+    style M0 fill:#F1F8FF,stroke:#42A5F5
+    style M1 fill:#F6F6F6,stroke:#CFCFCF
+    style M2 fill:#F1F8FF,stroke:#42A5F5
+    style nest0_0 fill:#D7CCC8,stroke:#795548
+    style nest0_1 fill:#F1F8FF,stroke:#42A5F5
+    style nest0_2 fill:#F1F8FF,stroke:#42A5F5
+    style nest1_0 fill:#D7CCC8,stroke:#795548
+    style nest1_1 fill:#F1F8FF,stroke:#42A5F5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#CFCFCF,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_226.txt b/test/mermaid/hard/mermaid_226.txt
new file mode 100644
index 0000000000000000000000000000000000000000..19e97756d91d6c9d33b0120bfd2d44aa05dc546b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_226.txt
@@ -0,0 +1,39 @@
+<Campaign Management, connectedTo, Customer Service on Social Media>
+<Campaign Management, partOf, Engagement Rate Calculation>
+<Competitor Analysis, connectedTo, Audience Engagement>
+<Content Moderation, connectedTo, Group Management>
+<Content Moderation, connectedTo, Reach and Impressions Tracking>
+<Content Strategy, connectedTo, Story Format Content Creation>
+<Customer Service on Social Media, connectedTo, Competitor Analysis>
+<Customer Service on Social Media, connectedTo, Performance Analytics>
+<Customer Service on Social Media, connectedTo, Platform Selection>
+<Customer Service on Social Media, connectedTo, Story Format Content Creation>
+<Group Management, connectedTo, Social Selling>
+<Group Management, partOf, Influencer Collaboration>
+<Live Streaming on Social Media, partOf, Engagement Rate Calculation>
+<Live Streaming on Social Media, schedules posts, Campaign Management>
+<Performance Analytics, connectedTo, Platform Selection>
+<Performance Analytics, connectedTo, Reels or Short Video Production>
+<Personal Branding on Social Media, connectedTo, Platform Algorithm Understanding>
+<Personal Branding on Social Media, connectedTo, Reach and Impressions Tracking>
+<Personal Branding on Social Media, connectedTo, Trend Monitoring>
+<Platform Algorithm Understanding, connectedTo, Content Moderation>
+<Platform Selection, connectedTo, Reels or Short Video Production>
+<Reach and Impressions Tracking, connectedTo, Reputation Management>
+<Reels or Short Video Production, connectedTo, Content Strategy>
+<Reputation Management, connectedTo, Audience Engagement>
+<Reputation Management, connectedTo, Competitor Analysis>
+<Reputation Management, connectedTo, Customer Service on Social Media>
+<Reputation Management, connectedTo, Reels or Short Video Production>
+<Reputation Management, connectedTo, Story Format Content Creation>
+<Social Listening, connectedTo, Live Streaming on Social Media>
+<Social Listening, partOf, Engagement Rate Calculation>
+<Social Selling, connectedTo, Performance Analytics>
+<Social Selling, partOf, Influencer Collaboration>
+<Story Format Content Creation, connectedTo, Competitor Analysis>
+<Story Format Content Creation, connectedTo, Social Listening>
+<Trend Monitoring, connectedTo, Platform Algorithm Understanding>
+<Trend Monitoring, connectedTo, Reach and Impressions Tracking>
+<Trend Monitoring, connectedTo, Reels or Short Video Production>
+<start, connectedTo, Personal Branding on Social Media>
+<start, considers ethics, Platform Algorithm Understanding>
diff --git a/test/mermaid/hard/mermaid_227.txt b/test/mermaid/hard/mermaid_227.txt
new file mode 100644
index 0000000000000000000000000000000000000000..240e2e615b485203633d64417b6e14f817b0668a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_227.txt
@@ -0,0 +1,36 @@
+<Brand Voice Development, connectedTo, Partnership Management on Social>
+<Brand Voice Development, connectedTo, Reputation Management>
+<Campaign Management, connectedTo, Content Strategy>
+<Campaign Management, partOf, Engagement Rate Calculation>
+<Content Creation, connectedTo, User_Generated Content Curation>
+<Content Moderation, connectedTo, Content Creation>
+<Content Strategy, connectedTo, Follower Growth Monitoring>
+<Content Strategy, partOf, Engagement Rate Calculation>
+<Ethical Use of Social Media, connectedTo, Content Moderation>
+<Ethical Use of Social Media, connectedTo, Partnership Management on Social>
+<Ethical Use of Social Media, connectedTo, Platform Selection>
+<Ethical Use of Social Media, connectedTo, Reporting and Optimization>
+<Ethical Use of Social Media, connectedTo, Story Format Content Creation>
+<Follower Growth Monitoring, connectedTo, Ethical Use of Social Media>
+<Follower Growth Monitoring, partOf, Engagement Rate Calculation>
+<Hashtag Research, forms partnerships, Social Selling>
+<Link_in_Bio Optimization, connectedTo, Brand Voice Development>
+<Link_in_Bio Optimization, connectedTo, Partnership Management on Social>
+<Paid Social Media Advertising, connectedTo, Ethical Use of Social Media>
+<Partnership Management on Social, connectedTo, Hashtag Research>
+<Performance Analytics, connectedTo, Partnership Management on Social>
+<Performance Analytics, connectedTo, Reporting and Optimization>
+<Platform Selection, connectedTo, Partnership Management on Social>
+<Platform Selection, connectedTo, Performance Analytics>
+<Reach and Impressions Tracking, connectedTo, Hashtag Research>
+<Reach and Impressions Tracking, partOf, Polls and Quizzes Creation>
+<Reporting and Optimization, connectedTo, Campaign Management>
+<Reporting and Optimization, connectedTo, Content Moderation>
+<Reputation Management, connectedTo, Reach and Impressions Tracking>
+<Reputation Management, partOf, Polls and Quizzes Creation>
+<Social Listening, connectedTo, Paid Social Media Advertising>
+<Social Listening, connectedTo, Story Format Content Creation>
+<Story Format Content Creation, connectedTo, Link_in_Bio Optimization>
+<User_Generated Content Curation, monitors trends, Story Format Content Creation>
+<start, connectedTo, Social Listening>
+<start, connectedTo, Story Format Content Creation>
diff --git a/test/mermaid/hard/mermaid_228.mmd b/test/mermaid/hard/mermaid_228.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..178211503707876cfd2d76e24b91c9dccfec92bd
--- /dev/null
+++ b/test/mermaid/hard/mermaid_228.mmd
@@ -0,0 +1,118 @@
+graph LR
+    N0([start])
+    N1(Live Streaming on Social Media)
+    N2(Social Selling)
+    N3([Ethical Use of Social Media])
+    N4(Brand Voice Development)
+    N5([Reputation Management])
+    N6[(Group Management)]
+    N7(Content Strategy)
+    N8([Content Moderation])
+    N9{Platform Algorithm Understanding}
+    N10[(Reporting and Optimization)]
+    N11[Social Listening]
+    N12([Polls and Quizzes Creation])
+    N13(Content Creation)
+    N14[Competitor Analysis]
+    N15([Direct Messaging Strategy])
+    N16([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Social Media Audits
+        nest0_0[/Customer Service on Social Media/]
+        nest0_1{Reach and Impressions Tracking}
+        nest0_2[[Platform Selection]]
+    end
+    subgraph Link_in_Bio Optimization
+        nest1_0{Reels or Short Video Production}
+        nest1_1[/Campaign Management/]
+        nest1_2([User_Generated Content Curation])
+        nest1_3[Cross_Promotion]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> |yes| N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    N15 -.-> N16
+    nest0_0 -.-> |no| nest0_1
+    nest0_1 -.-> nest0_2
+    N12 --> nest0_0
+    nest0_2 -.-> N5
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N13 --> nest1_0
+    nest1_3 -.-> |yes| N7
+    N4 --> S0
+    S0 --> N13
+    S0 -.-> |yes| N11
+    S0 -.-> N9
+    N10 -.-> S1
+    S1 --> N12
+    S1 --> N16
+    N12 --> S2
+    S2 -.-> N16
+    S2 -.-> N14
+    S2 -.-> N15
+    N1 --> M1
+    N4 -.-> M1
+    N7 --> M1
+    M1 --> N9
+    style S0 fill:#C5CAE9,stroke:#3F51B5
+    style S1 fill:#FFFAE0,stroke:#FFE470
+    style S2 fill:#DFE7EB,stroke:#B0C5CD
+    style M1 fill:#DFE7EB,stroke:#B0C5CD
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FFE470,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_228.txt b/test/mermaid/hard/mermaid_228.txt
new file mode 100644
index 0000000000000000000000000000000000000000..8bb3958589e563c95cbe1e41f7abb61fc7f170f1
--- /dev/null
+++ b/test/mermaid/hard/mermaid_228.txt
@@ -0,0 +1,42 @@
+<Brand Voice Development, connectedTo, Content Creation>
+<Brand Voice Development, connectedTo, Platform Algorithm Understanding>
+<Brand Voice Development, connectedTo, Reputation Management>
+<Brand Voice Development, yes, Social Listening>
+<Campaign Management, connectedTo, User_Generated Content Curation>
+<Campaign Management, partOf, Link_in_Bio Optimization>
+<Competitor Analysis, connectedTo, Direct Messaging Strategy>
+<Content Creation, connectedTo, Competitor Analysis>
+<Content Creation, connectedTo, Reels or Short Video Production>
+<Content Moderation, connectedTo, Platform Algorithm Understanding>
+<Content Strategy, connectedTo, Platform Algorithm Understanding>
+<Content Strategy, yes, Content Moderation>
+<Cross_Promotion, partOf, Link_in_Bio Optimization>
+<Cross_Promotion, yes, Content Strategy>
+<Customer Service on Social Media, no, Reach and Impressions Tracking>
+<Customer Service on Social Media, partOf, Social Media Audits>
+<Direct Messaging Strategy, connectedTo, end>
+<Ethical Use of Social Media, connectedTo, Brand Voice Development>
+<Group Management, connectedTo, Content Strategy>
+<Live Streaming on Social Media, connectedTo, Platform Algorithm Understanding>
+<Live Streaming on Social Media, connectedTo, Social Selling>
+<Platform Algorithm Understanding, connectedTo, Reporting and Optimization>
+<Platform Selection, connectedTo, Reputation Management>
+<Platform Selection, partOf, Social Media Audits>
+<Polls and Quizzes Creation, connectedTo, Competitor Analysis>
+<Polls and Quizzes Creation, connectedTo, Content Creation>
+<Polls and Quizzes Creation, connectedTo, Customer Service on Social Media>
+<Polls and Quizzes Creation, connectedTo, Direct Messaging Strategy>
+<Polls and Quizzes Creation, connectedTo, end>
+<Reach and Impressions Tracking, connectedTo, Platform Selection>
+<Reach and Impressions Tracking, partOf, Social Media Audits>
+<Reels or Short Video Production, connectedTo, Campaign Management>
+<Reels or Short Video Production, partOf, Link_in_Bio Optimization>
+<Reporting and Optimization, connectedTo, Polls and Quizzes Creation>
+<Reporting and Optimization, connectedTo, Social Listening>
+<Reporting and Optimization, connectedTo, end>
+<Reputation Management, connectedTo, Group Management>
+<Social Listening, connectedTo, Polls and Quizzes Creation>
+<Social Selling, connectedTo, Ethical Use of Social Media>
+<User_Generated Content Curation, connectedTo, Cross_Promotion>
+<User_Generated Content Curation, partOf, Link_in_Bio Optimization>
+<start, connectedTo, Live Streaming on Social Media>
diff --git a/test/mermaid/hard/mermaid_229.mmd b/test/mermaid/hard/mermaid_229.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..b1f6f771951cbe53917e82c1a1b21ab6caedd433
--- /dev/null
+++ b/test/mermaid/hard/mermaid_229.mmd
@@ -0,0 +1,98 @@
+graph RL
+    N0([start])
+    N1[[Ranking Algorithms]]
+    N2(Video Search)
+    N3(Negative SEO Prevention)
+    N4[[Featured Snippets Optimization]]
+    N5([User Experience for Search])
+    N6(Personalized Search Results)
+    N7[Image Search]
+    N8[[Rank Tracking]]
+    N9[Mobile_First Indexing]
+    N10[[Technical SEO]]
+    N11(Schema Markup Implementation)
+    N12(User Intent Understanding)
+    N13([end])
+    S0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Local SEO
+        nest0_0[(Voice Search Optimization)]
+        nest0_1{Click_Through Rate Optimization}
+        nest0_2[/Google Analytics Integration/]
+        nest0_3{Query Processing}
+    end
+    subgraph Search Console Management
+        nest1_0{Google My Business Management}
+        nest1_1[[Knowledge Graph Integration]]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> |no| N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> N13
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N12 --> nest0_0
+    nest0_3 --> N10
+    nest1_0 -.-> nest1_1
+    N11 --> nest1_0
+    nest1_1 -.-> N5
+    N6 --> S0
+    S0 --> N13
+    S0 --> N8
+    S0 -.-> |no| N11
+    N5 -.-> M1
+    N2 -.-> M1
+    N0 -.-> M1
+    M1 --> N8
+    N4 -.-> M2
+    N0 -.-> M2
+    N5 --> M2
+    M2 --> N7
+    style S0 fill:#FFF9D4,stroke:#FFE69C
+    style M1 fill:#FFF9D4,stroke:#FFE69C
+    style M2 fill:#FFFDE0,stroke:#FFF8A6
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFE69C,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_229.txt b/test/mermaid/hard/mermaid_229.txt
new file mode 100644
index 0000000000000000000000000000000000000000..bbcd2ab5aeb12a64fc6b354f187f43c5f7016cbb
--- /dev/null
+++ b/test/mermaid/hard/mermaid_229.txt
@@ -0,0 +1,36 @@
+<Click_Through Rate Optimization, connectedTo, Google Analytics Integration>
+<Click_Through Rate Optimization, partOf, Local SEO>
+<Featured Snippets Optimization, connectedTo, Image Search>
+<Featured Snippets Optimization, connectedTo, User Experience for Search>
+<Google Analytics Integration, connectedTo, Query Processing>
+<Google Analytics Integration, partOf, Local SEO>
+<Google My Business Management, connectedTo, Knowledge Graph Integration>
+<Google My Business Management, partOf, Search Console Management>
+<Image Search, connectedTo, Rank Tracking>
+<Knowledge Graph Integration, connectedTo, User Experience for Search>
+<Knowledge Graph Integration, partOf, Search Console Management>
+<Mobile_First Indexing, connectedTo, Technical SEO>
+<Negative SEO Prevention, connectedTo, Featured Snippets Optimization>
+<Personalized Search Results, connectedTo, Image Search>
+<Personalized Search Results, connectedTo, Rank Tracking>
+<Personalized Search Results, connectedTo, end>
+<Personalized Search Results, no, Schema Markup Implementation>
+<Query Processing, connectedTo, Technical SEO>
+<Query Processing, partOf, Local SEO>
+<Rank Tracking, connectedTo, Mobile_First Indexing>
+<Ranking Algorithms, connectedTo, Video Search>
+<Schema Markup Implementation, connectedTo, Google My Business Management>
+<Schema Markup Implementation, connectedTo, User Intent Understanding>
+<Technical SEO, connectedTo, Schema Markup Implementation>
+<User Experience for Search, connectedTo, Image Search>
+<User Experience for Search, connectedTo, Personalized Search Results>
+<User Experience for Search, connectedTo, Rank Tracking>
+<User Intent Understanding, connectedTo, Voice Search Optimization>
+<User Intent Understanding, connectedTo, end>
+<Video Search, connectedTo, Rank Tracking>
+<Video Search, no, Negative SEO Prevention>
+<Voice Search Optimization, connectedTo, Click_Through Rate Optimization>
+<Voice Search Optimization, partOf, Local SEO>
+<start, connectedTo, Image Search>
+<start, connectedTo, Rank Tracking>
+<start, connectedTo, Ranking Algorithms>
diff --git a/test/mermaid/hard/mermaid_23.mmd b/test/mermaid/hard/mermaid_23.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..c62c9fc1c30f6d4e8aa4e577b59800c2ee74f22d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_23.mmd
@@ -0,0 +1,118 @@
+graph TD
+    N0([start])
+    N1[[Legal Consultation]]
+    N2(Regulatory Compliance Review)
+    N3[Client Interview]
+    N4[[Trial Session]]
+    N5[(Legal Research)]
+    N6{Verdict Announcement}
+    N7[(Pro Bono Work)]
+    N8([Bail Hearing])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Appeal Submission
+        nest0_0[[Trademark Registration]]
+        nest0_1([Estate Planning])
+    end
+    subgraph Document Drafting
+        nest1_0[/Plea Bargain/]
+        nest1_1(Enforcement)
+        nest1_2(Closing Argument)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    nest0_0 -.-> nest0_1
+    N2 -.-> nest0_0
+    nest0_1 -.-> N1
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N6 --> nest1_0
+    nest1_2 --> N5
+    N5 --> S0
+    S0 --> N7
+    S0 -.-> N8
+    N1 -.-> S1
+    S1 -.-> N8
+    S1 --> N3
+    S1 -.-> N4
+    N5 -.-> S2
+    S2 --> N7
+    S2 -.-> N8
+    N0 -.-> M0
+    N2 -.-> M0
+    N1 -.-> M0
+    M0 -.-> N4
+    N4 --> M1
+    N0 --> |licences| M1
+    N5 -.-> M1
+    M1 -.-> N7
+    N0 --> M2
+    N1 --> M2
+    M2 -.-> N5
+    style N0 fill:#F0F4C3,stroke:#AED581
+    style N1 fill:#F0F4C3,stroke:#AED581
+    style N2 fill:#D7CCC8,stroke:#795548
+    style N3 fill:#F0F4C3,stroke:#AED581
+    style N4 fill:#BBDEFB,stroke:#2196F3
+    style N5 fill:#D7CCC8,stroke:#795548
+    style N6 fill:#BBDEFB,stroke:#2196F3
+    style N7 fill:#D7CCC8,stroke:#795548
+    style N8 fill:#BBDEFB,stroke:#2196F3
+    style S0 fill:#D7CCC8,stroke:#795548
+    style S1 fill:#F0F4C3,stroke:#AED581
+    style S2 fill:#F0F4C3,stroke:#AED581
+    style M0 fill:#BBDEFB,stroke:#2196F3
+    style M1 fill:#F0F4C3,stroke:#AED581
+    style M2 fill:#D7CCC8,stroke:#795548
+    style nest0_0 fill:#D7CCC8,stroke:#795548
+    style nest0_1 fill:#BBDEFB,stroke:#2196F3
+    style nest1_0 fill:#BBDEFB,stroke:#2196F3
+    style nest1_1 fill:#D7CCC8,stroke:#795548
+    style nest1_2 fill:#F0F4C3,stroke:#AED581
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#795548,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_230.mmd b/test/mermaid/hard/mermaid_230.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..1ca73f05156944e05f981898fd4e2dda699f0437
--- /dev/null
+++ b/test/mermaid/hard/mermaid_230.mmd
@@ -0,0 +1,103 @@
+graph LR
+    N0([start])
+    N1(Academic Search)
+    N2([Click_Through Rate Optimization])
+    N3[Knowledge Graph Integration]
+    N4[[Site Architecture Optimization]]
+    N5([Keyword Research])
+    N6[Mobile_First Indexing]
+    N7[/Competitor Keyword Analysis/]
+    N8[Crawling Websites]
+    N9([Indexing Content])
+    N10[Search Engine Optimization]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Technical SEO
+        nest0_0[/Penalties Recovery/]
+        nest0_1[User Experience for Search]
+        nest0_2[Content Quality Assessment]
+    end
+    subgraph Google Analytics Integration
+        nest1_0[[Rank Tracking]]
+        nest1_1{Google My Business Management}
+        nest1_2[Featured Snippets Optimization]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> |no| N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    nest0_0 -.-> |yes| nest0_1
+    nest0_1 -.-> nest0_2
+    N9 --> nest0_0
+    nest0_2 --> N6
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N4 --> nest1_0
+    nest1_2 --> N6
+    N3 --> S0
+    S0 --> N9
+    S0 --> N8
+    S0 -.-> N10
+    N4 -.-> S1
+    S1 --> N8
+    S1 -.-> N7
+    N3 -.-> S2
+    S2 -.-> N9
+    S2 --> N7
+    N7 -.-> M1
+    N0 --> M1
+    M1 --> N9
+    N0 -.-> M2
+    N2 --> M2
+    N4 --> M2
+    M2 --> N6
+    style S0 fill:#FFFDE0,stroke:#FFF8A6
+    style S1 fill:#D1C4E9,stroke:#673AB7
+    style S2 fill:#D1C4E9,stroke:#673AB7
+    style M1 fill:#FFFDE0,stroke:#FFF8A6
+    style M2 fill:#ECCFF5,stroke:#CD8FF2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_230.txt b/test/mermaid/hard/mermaid_230.txt
new file mode 100644
index 0000000000000000000000000000000000000000..80104c095e6c4668017b2e11ba2b9d05873d2ee1
--- /dev/null
+++ b/test/mermaid/hard/mermaid_230.txt
@@ -0,0 +1,35 @@
+<Academic Search, connectedTo, Click_Through Rate Optimization>
+<Click_Through Rate Optimization, connectedTo, Knowledge Graph Integration>
+<Click_Through Rate Optimization, connectedTo, Mobile_First Indexing>
+<Competitor Keyword Analysis, connectedTo, Crawling Websites>
+<Competitor Keyword Analysis, connectedTo, Indexing Content>
+<Content Quality Assessment, connectedTo, Mobile_First Indexing>
+<Content Quality Assessment, partOf, Technical SEO>
+<Crawling Websites, connectedTo, Indexing Content>
+<Featured Snippets Optimization, connectedTo, Mobile_First Indexing>
+<Featured Snippets Optimization, partOf, Google Analytics Integration>
+<Google My Business Management, connectedTo, Featured Snippets Optimization>
+<Google My Business Management, partOf, Google Analytics Integration>
+<Indexing Content, connectedTo, Penalties Recovery>
+<Indexing Content, connectedTo, Search Engine Optimization>
+<Keyword Research, connectedTo, Mobile_First Indexing>
+<Knowledge Graph Integration, connectedTo, Competitor Keyword Analysis>
+<Knowledge Graph Integration, connectedTo, Crawling Websites>
+<Knowledge Graph Integration, connectedTo, Indexing Content>
+<Knowledge Graph Integration, connectedTo, Search Engine Optimization>
+<Knowledge Graph Integration, connectedTo, Site Architecture Optimization>
+<Mobile_First Indexing, no, Competitor Keyword Analysis>
+<Penalties Recovery, partOf, Technical SEO>
+<Penalties Recovery, yes, User Experience for Search>
+<Rank Tracking, connectedTo, Google My Business Management>
+<Rank Tracking, partOf, Google Analytics Integration>
+<Site Architecture Optimization, connectedTo, Competitor Keyword Analysis>
+<Site Architecture Optimization, connectedTo, Crawling Websites>
+<Site Architecture Optimization, connectedTo, Keyword Research>
+<Site Architecture Optimization, connectedTo, Mobile_First Indexing>
+<Site Architecture Optimization, connectedTo, Rank Tracking>
+<User Experience for Search, connectedTo, Content Quality Assessment>
+<User Experience for Search, partOf, Technical SEO>
+<start, connectedTo, Academic Search>
+<start, connectedTo, Indexing Content>
+<start, connectedTo, Mobile_First Indexing>
diff --git a/test/mermaid/hard/mermaid_231.txt b/test/mermaid/hard/mermaid_231.txt
new file mode 100644
index 0000000000000000000000000000000000000000..552294f3adc1c4726dfd94415de5fa17add1cd36
--- /dev/null
+++ b/test/mermaid/hard/mermaid_231.txt
@@ -0,0 +1,31 @@
+<Academic Search, optimizes UX, On_Page SEO>
+<Academic Search, partOf, Google Analytics Integration>
+<Click_Through Rate Optimization, connectedTo, Academic Search>
+<Click_Through Rate Optimization, partOf, Google Analytics Integration>
+<Competitor Keyword Analysis, connectedTo, Search Engine Marketing Strategy>
+<Content Quality Assessment, connectedTo, Competitor Keyword Analysis>
+<Content Quality Assessment, connectedTo, News Search>
+<Keyword Research, connectedTo, Content Quality Assessment>
+<Keyword Research, partOf, Negative SEO Prevention>
+<News Search, connectedTo, Search Result Display>
+<On_Page SEO, connectedTo, News Search>
+<On_Page SEO, connectedTo, Technical SEO>
+<Rank Tracking, connectedTo, Competitor Keyword Analysis>
+<Rank Tracking, connectedTo, Content Quality Assessment>
+<Ranking Algorithms, connectedTo, Video Search>
+<Ranking Algorithms, partOf, Negative SEO Prevention>
+<Search Engine Marketing Strategy, connectedTo, Click_Through Rate Optimization>
+<Search Engine Marketing Strategy, connectedTo, On_Page SEO>
+<Search Engine Marketing Strategy, connectedTo, Search Result Display>
+<Search Engine Marketing Strategy, manages PPC, Core Web Vitals Optimization>
+<Search Result Display, connectedTo, Core Web Vitals Optimization>
+<Site Architecture Optimization, connectedTo, Competitor Keyword Analysis>
+<Site Architecture Optimization, connectedTo, Rank Tracking>
+<Site Architecture Optimization, optimizes on_page, News Search>
+<Technical SEO, connectedTo, Ranking Algorithms>
+<Technical SEO, partOf, Negative SEO Prevention>
+<Video Search, connectedTo, Keyword Research>
+<Video Search, partOf, Negative SEO Prevention>
+<start, connectedTo, Competitor Keyword Analysis>
+<start, connectedTo, News Search>
+<start, connectedTo, Site Architecture Optimization>
diff --git a/test/mermaid/hard/mermaid_232.mmd b/test/mermaid/hard/mermaid_232.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..d22fe64b24c2776a3515d3f5623fdbe2eb11c4ed
--- /dev/null
+++ b/test/mermaid/hard/mermaid_232.mmd
@@ -0,0 +1,131 @@
+graph TD
+    N0([start])
+    N1[/Single Sign_On/]
+    N2([Fraud Detection in Identity])
+    N3(User Registration)
+    N4[(Privileged Access Management)]
+    N5{Digital Wallets for Identity}
+    N6[/Attribute Management/]
+    N7(Blockchain_based Identity)
+    N8{Risk_Based Authentication}
+    N9[Workforce Identity Management]
+    N10[/Digital Signatures/]
+    N11{Verifiable Credentials}
+    N12[(Biometric Authentication)]
+    N13[/Identity Lifecycle Management/]
+    N14(Authorization)
+    N15{Identity Verification}
+    N16([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Compliance with Data Protection Regulations
+        nest0_0(Access Governance)
+        nest0_1[Authentication]
+        nest0_2[Multi_Factor Authentication]
+    end
+    subgraph Non_Repudiation
+        nest1_0[[Identity Threat Detection and Response]]
+        nest1_1[/Identity Proofing/]
+        nest1_2[(De_provisioning)]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    N15 --> N16
+    nest0_0 --> nest0_1
+    nest0_1 -.-> |no| nest0_2
+    N4 -.-> nest0_0
+    nest0_2 --> |yes| N14
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N1 -.-> nest1_0
+    nest1_2 -.-> N14
+    N2 -.-> S0
+    S0 -.-> N15
+    S0 --> N9
+    S0 -.-> N14
+    S0 --> N13
+    N3 --> S1
+    S1 --> N9
+    S1 --> N8
+    S1 -.-> N16
+    N7 --> M0
+    N9 -.-> M0
+    N1 --> M0
+    N0 --> M0
+    M0 -.-> N12
+    N7 -.-> M1
+    N0 --> M1
+    N4 --> M1
+    M1 -.-> N12
+    N9 -.-> M2
+    N4 --> M2
+    N3 -.-> M2
+    M2 -.-> N12
+    style S0 fill:#FAEBF3,stroke:#F7BEE0
+    style S1 fill:#E1F5FE,stroke:#4FC3F7
+    style M0 fill:#E3F2FD,stroke:#64B5F6
+    style M1 fill:#E1F5FE,stroke:#4FC3F7
+    style M2 fill:#E3F2FD,stroke:#64B5F6
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 44 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 45 stroke:#4FC3F7,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_232.txt b/test/mermaid/hard/mermaid_232.txt
new file mode 100644
index 0000000000000000000000000000000000000000..bc9ffb0a9d84a01e4589ee2145d8b3dca1da661e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_232.txt
@@ -0,0 +1,43 @@
+<Access Governance, connectedTo, Authentication>
+<Access Governance, partOf, Compliance with Data Protection Regulations>
+<Attribute Management, connectedTo, Blockchain_based Identity>
+<Authentication, no, Multi_Factor Authentication>
+<Authentication, partOf, Compliance with Data Protection Regulations>
+<Authorization, connectedTo, Identity Verification>
+<Biometric Authentication, connectedTo, Identity Lifecycle Management>
+<Blockchain_based Identity, connectedTo, Biometric Authentication>
+<Blockchain_based Identity, connectedTo, Risk_Based Authentication>
+<De_provisioning, connectedTo, Authorization>
+<De_provisioning, partOf, Non_Repudiation>
+<Digital Signatures, connectedTo, Verifiable Credentials>
+<Digital Wallets for Identity, connectedTo, Attribute Management>
+<Fraud Detection in Identity, connectedTo, Authorization>
+<Fraud Detection in Identity, connectedTo, Identity Lifecycle Management>
+<Fraud Detection in Identity, connectedTo, Identity Verification>
+<Fraud Detection in Identity, connectedTo, User Registration>
+<Fraud Detection in Identity, connectedTo, Workforce Identity Management>
+<Identity Lifecycle Management, connectedTo, Authorization>
+<Identity Proofing, connectedTo, De_provisioning>
+<Identity Proofing, partOf, Non_Repudiation>
+<Identity Threat Detection and Response, connectedTo, Identity Proofing>
+<Identity Threat Detection and Response, partOf, Non_Repudiation>
+<Identity Verification, connectedTo, end>
+<Multi_Factor Authentication, partOf, Compliance with Data Protection Regulations>
+<Multi_Factor Authentication, yes, Authorization>
+<Privileged Access Management, connectedTo, Access Governance>
+<Privileged Access Management, connectedTo, Biometric Authentication>
+<Privileged Access Management, connectedTo, Digital Wallets for Identity>
+<Risk_Based Authentication, connectedTo, Workforce Identity Management>
+<Single Sign_On, connectedTo, Biometric Authentication>
+<Single Sign_On, connectedTo, Fraud Detection in Identity>
+<Single Sign_On, connectedTo, Identity Threat Detection and Response>
+<User Registration, connectedTo, Biometric Authentication>
+<User Registration, connectedTo, Privileged Access Management>
+<User Registration, connectedTo, Risk_Based Authentication>
+<User Registration, connectedTo, Workforce Identity Management>
+<User Registration, connectedTo, end>
+<Verifiable Credentials, connectedTo, Biometric Authentication>
+<Workforce Identity Management, connectedTo, Biometric Authentication>
+<Workforce Identity Management, connectedTo, Digital Signatures>
+<start, connectedTo, Biometric Authentication>
+<start, connectedTo, Single Sign_On>
diff --git a/test/mermaid/hard/mermaid_233.txt b/test/mermaid/hard/mermaid_233.txt
new file mode 100644
index 0000000000000000000000000000000000000000..5bda76647196e701a4d83eb039b1d640098771e0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_233.txt
@@ -0,0 +1,48 @@
+<API Security for Identity, connectedTo, Privacy Management>
+<Adaptive Authentication, connectedTo, Blockchain_based Identity>
+<Adaptive Authentication, partOf, KYC Integration>
+<Authentication, connectedTo, De_provisioning>
+<Authentication, connectedTo, Identity as a Service>
+<Biometric Authentication, connectedTo, Consent Management>
+<Biometric Authentication, partOf, Access Governance>
+<Blockchain_based Identity, connectedTo, Compliance with Data Protection Regulations>
+<Blockchain_based Identity, connectedTo, De_provisioning>
+<Blockchain_based Identity, connectedTo, Identity as a Service>
+<Compliance with Data Protection Regulations, connectedTo, Customer Identity and Access Management>
+<Compliance with Data Protection Regulations, connectedTo, De_provisioning>
+<Compliance with Data Protection Regulations, connectedTo, Identity as a Service>
+<Compliance with Data Protection Regulations, manages passwords, De_provisioning>
+<Consent Management, connectedTo, Multi_Factor Authentication>
+<Consent Management, partOf, Access Governance>
+<Credential Management, connectedTo, Portable Identities>
+<Credential Management, partOf, KYC Integration>
+<Customer Identity and Access Management, connectedTo, Social Login Integration>
+<De_provisioning, connectedTo, API Security for Identity>
+<De_provisioning, connectedTo, Authorization>
+<De_provisioning, connectedTo, Credential Management>
+<De_provisioning, connectedTo, Digital Signatures>
+<De_provisioning, connectedTo, Identity as a Service>
+<Decentralized Identifiers, connectedTo, User Provisioning>
+<Digital Certificates, connectedTo, De_provisioning>
+<Digital Certificates, connectedTo, Password Management>
+<Digital Signatures, connectedTo, Authorization>
+<Fraud Detection in Identity, connectedTo, Blockchain_based Identity>
+<Fraud Detection in Identity, connectedTo, Customer Identity and Access Management>
+<Fraud Detection in Identity, connectedTo, De_provisioning>
+<Fraud Detection in Identity, connectedTo, Digital Certificates>
+<Fraud Detection in Identity, connectedTo, Social Login Integration>
+<Identity as a Service, connectedTo, API Security for Identity>
+<Identity as a Service, connectedTo, Authorization>
+<Identity as a Service, connectedTo, Biometric Authentication>
+<Identity as a Service, connectedTo, Digital Signatures>
+<Identity as a Service, connectedTo, Privacy Management>
+<Multi_Factor Authentication, connectedTo, Single Sign_On>
+<Multi_Factor Authentication, partOf, Access Governance>
+<Password Management, connectedTo, Blockchain_based Identity>
+<Portable Identities, connectedTo, Adaptive Authentication>
+<Portable Identities, partOf, KYC Integration>
+<Privacy Management, connectedTo, Digital Signatures>
+<Single Sign_On, connectedTo, Blockchain_based Identity>
+<Single Sign_On, partOf, Access Governance>
+<Social Login Integration, connectedTo, Decentralized Identifiers>
+<User Provisioning, connectedTo, Authentication>
diff --git a/test/mermaid/hard/mermaid_234.mmd b/test/mermaid/hard/mermaid_234.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..8d8816ebc22ed25338b9c856048291dfd5d8e278
--- /dev/null
+++ b/test/mermaid/hard/mermaid_234.mmd
@@ -0,0 +1,110 @@
+graph LR
+    N0([start])
+    N1[[Decentralized Identifiers]]
+    N2([Attribute Management])
+    N3[/KYC Integration/]
+    N4{Authorization}
+    N5[Single Sign_On]
+    N6([Verifiable Credentials])
+    N7[Digital Wallets for Identity]
+    N8(Data Minimization Principles)
+    N9[(Biometric Authentication)]
+    N10[Workforce Identity Management]
+    N11[User Registration]
+    N12([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Digital Certificates
+        nest0_0[/Data Encryption for Identity/]
+        nest0_1[[Digital Signatures]]
+    end
+    subgraph Customer Identity and Access Management
+        nest1_0[(API Security for Identity)]
+        nest1_1[/Identity Lifecycle Management/]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> |audits access| N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    nest0_0 -.-> |integrates social logins| nest0_1
+    N10 --> nest0_0
+    nest0_1 -.-> N1
+    nest1_0 --> nest1_1
+    N9 --> nest1_0
+    nest1_1 --> N9
+    N2 --> S0
+    S0 --> N9
+    S0 -.-> |manages wallets| N7
+    N0 --> S1
+    S1 -.-> N4
+    S1 --> N9
+    S1 -.-> N7
+    N9 -.-> M0
+    N5 -.-> M0
+    M0 --> N11
+    N8 -.-> M1
+    N2 --> M1
+    M1 -.-> N10
+    style N0 fill:#FFF9C4,stroke:#FFEB3B
+    style N1 fill:#FFEBEE,stroke:#E57373
+    style N2 fill:#FFF9C4,stroke:#FFEB3B
+    style N3 fill:#E4E0DF,stroke:#BDAFA8
+    style N4 fill:#FFEBEE,stroke:#E57373
+    style N5 fill:#FFEBEE,stroke:#E57373
+    style N6 fill:#E4E0DF,stroke:#BDAFA8
+    style N7 fill:#E4E0DF,stroke:#BDAFA8
+    style N8 fill:#FFF9C4,stroke:#FFEB3B
+    style N9 fill:#E4E0DF,stroke:#BDAFA8
+    style N10 fill:#FFEBEE,stroke:#E57373
+    style N11 fill:#E4E0DF,stroke:#BDAFA8
+    style N12 fill:#FFEBEE,stroke:#E57373
+    style S0 fill:#FFF9C4,stroke:#FFEB3B
+    style S1 fill:#E4E0DF,stroke:#BDAFA8
+    style M0 fill:#E4E0DF,stroke:#BDAFA8
+    style M1 fill:#FFEBEE,stroke:#E57373
+    style nest0_0 fill:#FFF9C4,stroke:#FFEB3B
+    style nest0_1 fill:#E4E0DF,stroke:#BDAFA8
+    style nest1_0 fill:#FFEBEE,stroke:#E57373
+    style nest1_1 fill:#FFF9C4,stroke:#FFEB3B
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFEB3B,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_234.txt b/test/mermaid/hard/mermaid_234.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0bf0a08831d6700215913b5fd99f2ece476ed896
--- /dev/null
+++ b/test/mermaid/hard/mermaid_234.txt
@@ -0,0 +1,31 @@
+<API Security for Identity, connectedTo, Identity Lifecycle Management>
+<API Security for Identity, partOf, Customer Identity and Access Management>
+<Attribute Management, connectedTo, Biometric Authentication>
+<Attribute Management, connectedTo, KYC Integration>
+<Attribute Management, connectedTo, Workforce Identity Management>
+<Attribute Management, manages wallets, Digital Wallets for Identity>
+<Authorization, connectedTo, Single Sign_On>
+<Biometric Authentication, connectedTo, API Security for Identity>
+<Biometric Authentication, connectedTo, User Registration>
+<Biometric Authentication, connectedTo, Workforce Identity Management>
+<Data Encryption for Identity, integrates social logins, Digital Signatures>
+<Data Encryption for Identity, partOf, Digital Certificates>
+<Data Minimization Principles, connectedTo, Biometric Authentication>
+<Data Minimization Principles, connectedTo, Workforce Identity Management>
+<Decentralized Identifiers, connectedTo, Attribute Management>
+<Digital Signatures, connectedTo, Decentralized Identifiers>
+<Digital Signatures, partOf, Digital Certificates>
+<Digital Wallets for Identity, connectedTo, Data Minimization Principles>
+<Identity Lifecycle Management, connectedTo, Biometric Authentication>
+<Identity Lifecycle Management, partOf, Customer Identity and Access Management>
+<KYC Integration, connectedTo, Authorization>
+<Single Sign_On, audits access, Verifiable Credentials>
+<Single Sign_On, connectedTo, User Registration>
+<User Registration, connectedTo, end>
+<Verifiable Credentials, connectedTo, Digital Wallets for Identity>
+<Workforce Identity Management, connectedTo, Data Encryption for Identity>
+<Workforce Identity Management, connectedTo, User Registration>
+<start, connectedTo, Authorization>
+<start, connectedTo, Biometric Authentication>
+<start, connectedTo, Decentralized Identifiers>
+<start, connectedTo, Digital Wallets for Identity>
diff --git a/test/mermaid/hard/mermaid_235.mmd b/test/mermaid/hard/mermaid_235.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..ecc785cf911491cc9665f7c367fd4396c0b5dd56
--- /dev/null
+++ b/test/mermaid/hard/mermaid_235.mmd
@@ -0,0 +1,114 @@
+graph LR
+    N0([Assessment Design])
+    N1(Content Creation)
+    N2(Micro_credential Programs)
+    N3[Instructor Training]
+    N4[(Discussion Forum Moderation)]
+    N5[Personalized Learning Paths]
+    N6{Adaptive Learning Technologies}
+    N7{Collaborative Projects}
+    N8(Curriculum Development)
+    N9[Asynchronous Learning]
+    N10([Competency_Based Education])
+    N11[/Accessibility Features/]
+    N12[Synchronous Learning]
+    N13(Language Learning Platforms)
+    N14([end])
+    S0(( ))
+    S1(( ))
+    M1(( ))
+    subgraph Blended Learning Models
+        nest0_0(Virtual Classroom Facilitation)
+        nest0_1[Parent or Guardian Communication]
+    end
+    subgraph Student Progress Tracking
+        nest1_0[(Virtual Labs and Simulations)]
+        nest1_1([Test Preparation Courses])
+        nest1_2(Digital Badges)
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> |creates courses| N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> |supports SEL| N11
+    N11 --> N12
+    N12 --> N13
+    N13 --> N14
+    nest0_0 -.-> |manages enrollments| nest0_1
+    N6 -.-> nest0_0
+    nest0_1 -.-> N4
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N2 --> nest1_0
+    nest1_2 -.-> N12
+    N9 --> S0
+    S0 --> N11
+    S0 -.-> N14
+    S0 --> N12
+    N2 -.-> S1
+    S1 --> N4
+    S1 -.-> N5
+    N0 -.-> M1
+    N4 -.-> M1
+    M1 --> N11
+    style N0 fill:#EDF5F3,stroke:#A1D7CD
+    style N1 fill:#E1BEE7,stroke:#9C27B0
+    style N2 fill:#E1BEE7,stroke:#9C27B0
+    style N3 fill:#E1BEE7,stroke:#9C27B0
+    style N4 fill:#EDF5F3,stroke:#A1D7CD
+    style N5 fill:#EDF5F3,stroke:#A1D7CD
+    style N6 fill:#EDF5F3,stroke:#A1D7CD
+    style N7 fill:#EDF5F3,stroke:#A1D7CD
+    style N8 fill:#EDF5F3,stroke:#A1D7CD
+    style N9 fill:#E1BEE7,stroke:#9C27B0
+    style N10 fill:#E1BEE7,stroke:#9C27B0
+    style N11 fill:#E1BEE7,stroke:#9C27B0
+    style N12 fill:#EDF5F3,stroke:#A1D7CD
+    style N13 fill:#E4E0DF,stroke:#BDAFA8
+    style N14 fill:#EDF5F3,stroke:#A1D7CD
+    style S0 fill:#EDF5F3,stroke:#A1D7CD
+    style S1 fill:#E1BEE7,stroke:#9C27B0
+    style M1 fill:#EDF5F3,stroke:#A1D7CD
+    style nest0_0 fill:#EDF5F3,stroke:#A1D7CD
+    style nest0_1 fill:#EDF5F3,stroke:#A1D7CD
+    style nest1_0 fill:#E1BEE7,stroke:#9C27B0
+    style nest1_1 fill:#E4E0DF,stroke:#BDAFA8
+    style nest1_2 fill:#E1BEE7,stroke:#9C27B0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#BDAFA8,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_235.txt b/test/mermaid/hard/mermaid_235.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6ff69aa0a11b324caa5a9c27a8ab9995752df9ca
--- /dev/null
+++ b/test/mermaid/hard/mermaid_235.txt
@@ -0,0 +1,33 @@
+<Accessibility Features, connectedTo, Synchronous Learning>
+<Adaptive Learning Technologies, connectedTo, Collaborative Projects>
+<Adaptive Learning Technologies, connectedTo, Virtual Classroom Facilitation>
+<Assessment Design, connectedTo, Accessibility Features>
+<Assessment Design, connectedTo, Content Creation>
+<Asynchronous Learning, connectedTo, Accessibility Features>
+<Asynchronous Learning, connectedTo, Competency_Based Education>
+<Asynchronous Learning, connectedTo, Synchronous Learning>
+<Asynchronous Learning, connectedTo, end>
+<Collaborative Projects, connectedTo, Curriculum Development>
+<Competency_Based Education, supports SEL, Accessibility Features>
+<Content Creation, connectedTo, Micro_credential Programs>
+<Curriculum Development, connectedTo, Asynchronous Learning>
+<Digital Badges, connectedTo, Synchronous Learning>
+<Digital Badges, partOf, Student Progress Tracking>
+<Discussion Forum Moderation, connectedTo, Accessibility Features>
+<Discussion Forum Moderation, connectedTo, Personalized Learning Paths>
+<Instructor Training, creates courses, Discussion Forum Moderation>
+<Language Learning Platforms, connectedTo, end>
+<Micro_credential Programs, connectedTo, Discussion Forum Moderation>
+<Micro_credential Programs, connectedTo, Instructor Training>
+<Micro_credential Programs, connectedTo, Personalized Learning Paths>
+<Micro_credential Programs, connectedTo, Virtual Labs and Simulations>
+<Parent or Guardian Communication, connectedTo, Discussion Forum Moderation>
+<Parent or Guardian Communication, partOf, Blended Learning Models>
+<Personalized Learning Paths, connectedTo, Adaptive Learning Technologies>
+<Synchronous Learning, connectedTo, Language Learning Platforms>
+<Test Preparation Courses, connectedTo, Digital Badges>
+<Test Preparation Courses, partOf, Student Progress Tracking>
+<Virtual Classroom Facilitation, manages enrollments, Parent or Guardian Communication>
+<Virtual Classroom Facilitation, partOf, Blended Learning Models>
+<Virtual Labs and Simulations, connectedTo, Test Preparation Courses>
+<Virtual Labs and Simulations, partOf, Student Progress Tracking>
diff --git a/test/mermaid/hard/mermaid_237.mmd b/test/mermaid/hard/mermaid_237.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..a24281ef9f81b3ee9a2342b0dd859658a5aab905
--- /dev/null
+++ b/test/mermaid/hard/mermaid_237.mmd
@@ -0,0 +1,110 @@
+graph LR
+    N0([start])
+    N1{Bootcamp Development}
+    N2(Synchronous Learning)
+    N3(Curriculum Development)
+    N4{Virtual Field Trips}
+    N5[[Collaborative Projects]]
+    N6[(Student Engagement Strategies)]
+    N7[Digital Badges]
+    N8[[Asynchronous Learning]]
+    N9[Learning Analytics]
+    N10[/Micro_credential Programs/]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Instructor Training
+        nest0_0[Learning Management System Administration]
+        nest0_1(Personalized Learning Paths)
+        nest0_2[[Course Design]]
+    end
+    subgraph Discussion Forum Moderation
+        nest1_0(Blended Learning Models)
+        nest1_1{Peer_to_Peer Learning}
+        nest1_2[Accreditation Management]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> |offers online tutoring| N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> |trains educators| N7
+    N7 --> N8
+    N8 --> |offers professional development| N9
+    N9 --> |applies learning design| N10
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N8 --> nest0_0
+    nest0_2 --> N6
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N9 --> nest1_0
+    nest1_2 --> N6
+    N2 --> S0
+    S0 --> N7
+    S0 --> N8
+    N2 --> S1
+    S1 --> N5
+    S1 --> N6
+    N0 --> S2
+    S2 --> N10
+    S2 --> |digitizes curriculum| N9
+    N0 --> M1
+    N2 --> M1
+    N4 -.-> M1
+    M1 --> N6
+    style N0 fill:#FCE4EC,stroke:#F06292
+    style N1 fill:#FCE4EC,stroke:#F06292
+    style N2 fill:#DDCEDD,stroke:#AF56A6
+    style N3 fill:#DDCEDD,stroke:#AF56A6
+    style N4 fill:#FCE4EC,stroke:#F06292
+    style N5 fill:#FCE4EC,stroke:#F06292
+    style N6 fill:#DDCEDD,stroke:#AF56A6
+    style N7 fill:#C8E6C9,stroke:#4CAF50
+    style N8 fill:#FCE4EC,stroke:#F06292
+    style N9 fill:#FCE4EC,stroke:#F06292
+    style N10 fill:#C8E6C9,stroke:#4CAF50
+    style S0 fill:#FCE4EC,stroke:#F06292
+    style S1 fill:#DDCEDD,stroke:#AF56A6
+    style S2 fill:#FCE4EC,stroke:#F06292
+    style M1 fill:#FCE4EC,stroke:#F06292
+    style nest0_0 fill:#DDCEDD,stroke:#AF56A6
+    style nest0_1 fill:#DDCEDD,stroke:#AF56A6
+    style nest0_2 fill:#FCE4EC,stroke:#F06292
+    style nest1_0 fill:#FCE4EC,stroke:#F06292
+    style nest1_1 fill:#FCE4EC,stroke:#F06292
+    style nest1_2 fill:#C8E6C9,stroke:#4CAF50
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_237.txt b/test/mermaid/hard/mermaid_237.txt
new file mode 100644
index 0000000000000000000000000000000000000000..bdd6b448047a28f38426bb00ecce2dc3a109b609
--- /dev/null
+++ b/test/mermaid/hard/mermaid_237.txt
@@ -0,0 +1,32 @@
+<Accreditation Management, connectedTo, Student Engagement Strategies>
+<Accreditation Management, partOf, Discussion Forum Moderation>
+<Asynchronous Learning, connectedTo, Learning Management System Administration>
+<Asynchronous Learning, offers professional development, Learning Analytics>
+<Blended Learning Models, connectedTo, Peer_to_Peer Learning>
+<Blended Learning Models, partOf, Discussion Forum Moderation>
+<Bootcamp Development, connectedTo, Synchronous Learning>
+<Collaborative Projects, connectedTo, Student Engagement Strategies>
+<Course Design, connectedTo, Student Engagement Strategies>
+<Course Design, partOf, Instructor Training>
+<Curriculum Development, connectedTo, Virtual Field Trips>
+<Digital Badges, connectedTo, Asynchronous Learning>
+<Learning Analytics, applies learning design, Micro_credential Programs>
+<Learning Analytics, connectedTo, Blended Learning Models>
+<Learning Management System Administration, connectedTo, Personalized Learning Paths>
+<Learning Management System Administration, partOf, Instructor Training>
+<Peer_to_Peer Learning, connectedTo, Accreditation Management>
+<Peer_to_Peer Learning, partOf, Discussion Forum Moderation>
+<Personalized Learning Paths, connectedTo, Course Design>
+<Personalized Learning Paths, partOf, Instructor Training>
+<Student Engagement Strategies, trains educators, Digital Badges>
+<Synchronous Learning, connectedTo, Asynchronous Learning>
+<Synchronous Learning, connectedTo, Collaborative Projects>
+<Synchronous Learning, connectedTo, Digital Badges>
+<Synchronous Learning, connectedTo, Student Engagement Strategies>
+<Synchronous Learning, offers online tutoring, Curriculum Development>
+<Virtual Field Trips, connectedTo, Collaborative Projects>
+<Virtual Field Trips, connectedTo, Student Engagement Strategies>
+<start, connectedTo, Bootcamp Development>
+<start, connectedTo, Micro_credential Programs>
+<start, connectedTo, Student Engagement Strategies>
+<start, digitizes curriculum, Learning Analytics>
diff --git a/test/mermaid/hard/mermaid_238.mmd b/test/mermaid/hard/mermaid_238.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..aa004c5ddd571608f9c5292b82fd684014a74b4a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_238.mmd
@@ -0,0 +1,124 @@
+graph TD
+    N0([start])
+    N1[/Learner Feedback Analysis/]
+    N2(Course Pilot Testing)
+    N3(Industry Collaboration for Content)
+    N4{Mobile Learning Experience}
+    N5[Learner Analytics]
+    N6[Completion Rate Optimization]
+    N7([Specialization or Professional Certificate Programs])
+    N8[/Translation and Localization/]
+    N9[[Course Audit Options]]
+    N10[Financial Aid for Learners]
+    N11[(Verified Track Management)]
+    N12(Learner Support)
+    N13{Course Promotion}
+    N14([Engagement Metrics Tracking])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Skill_Based Learning Outcomes
+        nest0_0(Employer Recognition)
+        nest0_1[[Subscription Models]]
+        nest0_2(Micro_credential Stacking)
+    end
+    subgraph Continuous Course Improvement
+        nest1_0[/Discussion Forum Management/]
+        nest1_1(Career Pathway Mapping)
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> |promotes courses| N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> |partners with universities| N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> N12
+    N12 -.-> |develops content| N13
+    N13 -.-> N14
+    nest0_0 --> nest0_1
+    nest0_1 -.-> |optimizes engagement| nest0_2
+    N13 -.-> |monetizes offerings| nest0_0
+    nest0_2 -.-> N14
+    nest1_0 -.-> nest1_1
+    N7 --> nest1_0
+    nest1_1 --> N8
+    N0 -.-> S0
+    S0 --> N12
+    S0 -.-> N4
+    N9 --> S1
+    S1 --> N12
+    S1 --> |manages certifications| N11
+    S1 --> N14
+    N6 --> M0
+    N5 -.-> M0
+    M0 -.-> N10
+    N5 --> M1
+    N3 --> M1
+    N9 --> M1
+    M1 --> N11
+    style N0 fill:#DACBE3,stroke:#A188D0
+    style N1 fill:#DACBE3,stroke:#A188D0
+    style N2 fill:#FFEBEB,stroke:#FFC2C2
+    style N3 fill:#F0F0F0,stroke:#D2D2D2
+    style N4 fill:#F0F0F0,stroke:#D2D2D2
+    style N5 fill:#F0F0F0,stroke:#D2D2D2
+    style N6 fill:#FFEBEB,stroke:#FFC2C2
+    style N7 fill:#F0F0F0,stroke:#D2D2D2
+    style N8 fill:#DACBE3,stroke:#A188D0
+    style N9 fill:#DACBE3,stroke:#A188D0
+    style N10 fill:#DACBE3,stroke:#A188D0
+    style N11 fill:#DACBE3,stroke:#A188D0
+    style N12 fill:#DACBE3,stroke:#A188D0
+    style N13 fill:#DACBE3,stroke:#A188D0
+    style N14 fill:#FFEBEB,stroke:#FFC2C2
+    style S0 fill:#F0F0F0,stroke:#D2D2D2
+    style S1 fill:#DACBE3,stroke:#A188D0
+    style M0 fill:#FFEBEB,stroke:#FFC2C2
+    style M1 fill:#FFEBEB,stroke:#FFC2C2
+    style nest0_0 fill:#DACBE3,stroke:#A188D0
+    style nest0_1 fill:#DACBE3,stroke:#A188D0
+    style nest0_2 fill:#FFEBEB,stroke:#FFC2C2
+    style nest1_0 fill:#FFEBEB,stroke:#FFC2C2
+    style nest1_1 fill:#DACBE3,stroke:#A188D0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#A188D0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_238.txt b/test/mermaid/hard/mermaid_238.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e0dcef3f6ae72a5e10847dfa26465ce2e27be0fa
--- /dev/null
+++ b/test/mermaid/hard/mermaid_238.txt
@@ -0,0 +1,36 @@
+<Career Pathway Mapping, connectedTo, Translation and Localization>
+<Career Pathway Mapping, partOf, Continuous Course Improvement>
+<Completion Rate Optimization, connectedTo, Financial Aid for Learners>
+<Completion Rate Optimization, connectedTo, Specialization or Professional Certificate Programs>
+<Course Audit Options, connectedTo, Engagement Metrics Tracking>
+<Course Audit Options, connectedTo, Financial Aid for Learners>
+<Course Audit Options, connectedTo, Learner Support>
+<Course Audit Options, connectedTo, Verified Track Management>
+<Course Audit Options, manages certifications, Verified Track Management>
+<Course Pilot Testing, connectedTo, Industry Collaboration for Content>
+<Course Promotion, connectedTo, Engagement Metrics Tracking>
+<Course Promotion, monetizes offerings, Employer Recognition>
+<Discussion Forum Management, connectedTo, Career Pathway Mapping>
+<Discussion Forum Management, partOf, Continuous Course Improvement>
+<Employer Recognition, connectedTo, Subscription Models>
+<Employer Recognition, partOf, Skill_Based Learning Outcomes>
+<Financial Aid for Learners, connectedTo, Verified Track Management>
+<Industry Collaboration for Content, connectedTo, Mobile Learning Experience>
+<Industry Collaboration for Content, connectedTo, Verified Track Management>
+<Learner Analytics, connectedTo, Financial Aid for Learners>
+<Learner Analytics, connectedTo, Verified Track Management>
+<Learner Analytics, promotes courses, Completion Rate Optimization>
+<Learner Feedback Analysis, connectedTo, Course Pilot Testing>
+<Learner Support, develops content, Course Promotion>
+<Micro_credential Stacking, connectedTo, Engagement Metrics Tracking>
+<Micro_credential Stacking, partOf, Skill_Based Learning Outcomes>
+<Mobile Learning Experience, connectedTo, Learner Analytics>
+<Specialization or Professional Certificate Programs, connectedTo, Discussion Forum Management>
+<Specialization or Professional Certificate Programs, connectedTo, Translation and Localization>
+<Subscription Models, optimizes engagement, Micro_credential Stacking>
+<Subscription Models, partOf, Skill_Based Learning Outcomes>
+<Translation and Localization, partners with universities, Course Audit Options>
+<Verified Track Management, connectedTo, Learner Support>
+<start, connectedTo, Learner Feedback Analysis>
+<start, connectedTo, Learner Support>
+<start, connectedTo, Mobile Learning Experience>
diff --git a/test/mermaid/hard/mermaid_239.mmd b/test/mermaid/hard/mermaid_239.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..f6bd7f3cdfa5d043c69a005a7187e7f838747c51
--- /dev/null
+++ b/test/mermaid/hard/mermaid_239.mmd
@@ -0,0 +1,140 @@
+graph RL
+    N0([Self_Paced Learning Tracks])
+    N1[(Specialization or Professional Certificate Programs)]
+    N2(Corporate Training Solutions)
+    N3[[Content Licensing]]
+    N4(Skill_Based Learning Outcomes)
+    N5[[Research on MOOC Effectiveness]]
+    N6(Certificate of Completion Issuance)
+    N7(Translation and Localization)
+    N8(Course Audit Options)
+    N9{Learner Feedback Analysis}
+    N10[Peer Grading Implementation]
+    N11(Gamification for Engagement)
+    N12[/Discussion Forum Management/]
+    N13{Micro_credential Stacking}
+    N14{Learner Support}
+    N15([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Forum Moderation
+        nest0_0[(Engagement Metrics Tracking)]
+        nest0_1{Learner Analytics}
+        nest0_2([Course Retirement Planning])
+        nest0_3([Mobile Learning Experience])
+    end
+    subgraph Instructor Recruitment for MOOCs
+        nest1_0{Platform Selection}
+        nest1_1{Course Promotion}
+        nest1_2{University Partnerships}
+        nest1_3[Assessment Creation]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N2 --> |researches impact| nest0_0
+    nest0_3 -.-> N3
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N10 --> |integrates tools| nest1_0
+    nest1_3 --> |provides technical support| N1
+    N11 -.-> S0
+    S0 -.-> N14
+    S0 --> N15
+    S0 --> |manages registrations| N13
+    N6 -.-> S1
+    S1 --> |partners with universities| N8
+    S1 --> N12
+    N7 -.-> M0
+    N4 --> M0
+    M0 -.-> N10
+    N2 -.-> M1
+    N4 -.-> M1
+    N8 --> |localizes platforms| M1
+    M1 --> N11
+    style N0 fill:#F9FBE7,stroke:#DCE775
+    style N1 fill:#F1F8FF,stroke:#42A5F5
+    style N2 fill:#DFE7EB,stroke:#B0C5CD
+    style N3 fill:#F1F8FF,stroke:#42A5F5
+    style N4 fill:#DFE7EB,stroke:#B0C5CD
+    style N5 fill:#F1F8FF,stroke:#42A5F5
+    style N6 fill:#F9FBE7,stroke:#DCE775
+    style N7 fill:#F1F8FF,stroke:#42A5F5
+    style N8 fill:#F9FBE7,stroke:#DCE775
+    style N9 fill:#DFE7EB,stroke:#B0C5CD
+    style N10 fill:#F1F8FF,stroke:#42A5F5
+    style N11 fill:#F9FBE7,stroke:#DCE775
+    style N12 fill:#F9FBE7,stroke:#DCE775
+    style N13 fill:#F9FBE7,stroke:#DCE775
+    style N14 fill:#F1F8FF,stroke:#42A5F5
+    style N15 fill:#DFE7EB,stroke:#B0C5CD
+    style S0 fill:#F1F8FF,stroke:#42A5F5
+    style S1 fill:#DFE7EB,stroke:#B0C5CD
+    style M0 fill:#F1F8FF,stroke:#42A5F5
+    style M1 fill:#DFE7EB,stroke:#B0C5CD
+    style nest0_0 fill:#DFE7EB,stroke:#B0C5CD
+    style nest0_1 fill:#F1F8FF,stroke:#42A5F5
+    style nest0_2 fill:#DFE7EB,stroke:#B0C5CD
+    style nest0_3 fill:#F9FBE7,stroke:#DCE775
+    style nest1_0 fill:#F1F8FF,stroke:#42A5F5
+    style nest1_1 fill:#F1F8FF,stroke:#42A5F5
+    style nest1_2 fill:#F9FBE7,stroke:#DCE775
+    style nest1_3 fill:#DFE7EB,stroke:#B0C5CD
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_24.mmd b/test/mermaid/hard/mermaid_24.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..68bc855933fc94259dc893c3fbd3f1e457cad594
--- /dev/null
+++ b/test/mermaid/hard/mermaid_24.mmd
@@ -0,0 +1,96 @@
+graph BT
+    N0([Court Order Execution])
+    N1([Discovery Process])
+    N2[Settlement Negotiation]
+    N3(Legal Aid Assistance)
+    N4[Case Filing]
+    N5[/Estate Planning/]
+    N6(Arbitration Session)
+    N7([Client Interview])
+    N8[/Closing Argument/]
+    S0(( ))
+    S2(( ))
+    M0(( ))
+    subgraph Corporate Formation
+        nest0_0[/Immigration Petition/]
+        nest0_1[[Witness Testimony]]
+    end
+    subgraph Regulatory Compliance Review
+        nest1_0(Divorce Proceedings)
+        nest1_1[Trial Session]
+        nest1_2[Appeal Submission]
+        nest1_3[(Pro Bono Work)]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> |audits| N8
+    nest0_0 -.-> nest0_1
+    N4 -.-> nest0_0
+    nest0_1 -.-> N5
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N4 --> nest1_0
+    nest1_3 --> N2
+    N0 --> S0
+    S0 --> N6
+    S0 --> N7
+    S0 -.-> N2
+    S0 --> N3
+    N4 --> S2
+    S2 -.-> |analyzes| N8
+    S2 -.-> N7
+    N0 --> M0
+    N2 --> M0
+    M0 -.-> N8
+    style N0 fill:#E9F7E8,stroke:#6EB76D
+    style N1 fill:#FFF9D4,stroke:#FFE69C
+    style N2 fill:#FFF3E0,stroke:#FFB74D
+    style N3 fill:#FFF9D4,stroke:#FFE69C
+    style N4 fill:#FFF3E0,stroke:#FFB74D
+    style N5 fill:#E9F7E8,stroke:#6EB76D
+    style N6 fill:#FFF3E0,stroke:#FFB74D
+    style N7 fill:#E9F7E8,stroke:#6EB76D
+    style N8 fill:#FFF3E0,stroke:#FFB74D
+    style S0 fill:#FFF3E0,stroke:#FFB74D
+    style S2 fill:#E9F7E8,stroke:#6EB76D
+    style M0 fill:#FFF9D4,stroke:#FFE69C
+    style nest0_0 fill:#E9F7E8,stroke:#6EB76D
+    style nest0_1 fill:#E9F7E8,stroke:#6EB76D
+    style nest1_0 fill:#FFF3E0,stroke:#FFB74D
+    style nest1_1 fill:#FFF3E0,stroke:#FFB74D
+    style nest1_2 fill:#FFF3E0,stroke:#FFB74D
+    style nest1_3 fill:#FFF3E0,stroke:#FFB74D
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFB74D,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_24.txt b/test/mermaid/hard/mermaid_24.txt
new file mode 100644
index 0000000000000000000000000000000000000000..8cfd5e3db48a8853e2337811d104754b79bba30b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_24.txt
@@ -0,0 +1,30 @@
+<Appeal Submission, connectedTo, Pro Bono Work>
+<Appeal Submission, partOf, Regulatory Compliance Review>
+<Arbitration Session, connectedTo, Client Interview>
+<Case Filing, analyzes, Closing Argument>
+<Case Filing, connectedTo, Client Interview>
+<Case Filing, connectedTo, Divorce Proceedings>
+<Case Filing, connectedTo, Estate Planning>
+<Case Filing, connectedTo, Immigration Petition>
+<Client Interview, audits, Closing Argument>
+<Court Order Execution, connectedTo, Arbitration Session>
+<Court Order Execution, connectedTo, Client Interview>
+<Court Order Execution, connectedTo, Closing Argument>
+<Court Order Execution, connectedTo, Discovery Process>
+<Court Order Execution, connectedTo, Legal Aid Assistance>
+<Court Order Execution, connectedTo, Settlement Negotiation>
+<Discovery Process, connectedTo, Settlement Negotiation>
+<Divorce Proceedings, connectedTo, Trial Session>
+<Divorce Proceedings, partOf, Regulatory Compliance Review>
+<Estate Planning, connectedTo, Arbitration Session>
+<Immigration Petition, connectedTo, Witness Testimony>
+<Immigration Petition, partOf, Corporate Formation>
+<Legal Aid Assistance, connectedTo, Case Filing>
+<Pro Bono Work, connectedTo, Settlement Negotiation>
+<Pro Bono Work, partOf, Regulatory Compliance Review>
+<Settlement Negotiation, connectedTo, Closing Argument>
+<Settlement Negotiation, connectedTo, Legal Aid Assistance>
+<Trial Session, connectedTo, Appeal Submission>
+<Trial Session, partOf, Regulatory Compliance Review>
+<Witness Testimony, connectedTo, Estate Planning>
+<Witness Testimony, partOf, Corporate Formation>
diff --git a/test/mermaid/hard/mermaid_240.mmd b/test/mermaid/hard/mermaid_240.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..c1d9024f12b879509c0866f75d9203a147db3315
--- /dev/null
+++ b/test/mermaid/hard/mermaid_240.mmd
@@ -0,0 +1,138 @@
+graph RL
+    N0([Micro_credential Stacking])
+    N1([Global Accessibility Features])
+    N2[Course Pilot Testing]
+    N3(Instructor Recruitment for MOOCs)
+    N4[(Mobile Learning Experience)]
+    N5([Instructor_Led Sessions])
+    N6(Forum Moderation)
+    N7[/Research on MOOC Effectiveness/]
+    N8[(Learner Support)]
+    N9{Technical Infrastructure for Scale}
+    N10[[Platform Selection]]
+    N11(Self_Paced Learning Tracks)
+    N12(Learner Analytics)
+    N13[Career Pathway Mapping]
+    N14{Course Retirement Planning}
+    N15([Employer Recognition])
+    N16(Industry Collaboration for Content)
+    N17([end])
+    S0(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Content Licensing
+        nest0_0{Peer Grading Implementation}
+        nest0_1[Course Promotion]
+        nest0_2[/Gamification for Engagement/]
+    end
+    subgraph Completion Rate Optimization
+        nest1_0[/Specialization or Professional Certificate Programs/]
+        nest1_1[/Learner Feedback Analysis/]
+        nest1_2([Assessment Creation])
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> |complies with regulations| N3
+    N3 --> N4
+    N4 -.-> |optimizes engagement| N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> N12
+    N12 -.-> N13
+    N13 -.-> |analyzes data| N14
+    N14 --> N15
+    N15 -.-> N16
+    N16 --> N17
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N11 -.-> nest0_0
+    nest0_2 -.-> N7
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N2 -.-> nest1_0
+    nest1_2 -.-> |provides technical support| N13
+    N3 --> S0
+    S0 -.-> N8
+    S0 --> N17
+    S0 -.-> N9
+    S0 -.-> |facilitates peer review| N15
+    N0 --> M0
+    N5 --> M0
+    N3 --> M0
+    N2 --> M0
+    M0 --> N7
+    N0 -.-> M2
+    N2 -.-> M2
+    N3 -.-> M2
+    M2 -.-> N5
+    style N0 fill:#D0E0F8,stroke:#4285F4
+    style N1 fill:#CADEDE,stroke:#94C0C0
+    style N2 fill:#D0E0F8,stroke:#4285F4
+    style N3 fill:#FFE88D,stroke:#FFDA4E
+    style N4 fill:#D0E0F8,stroke:#4285F4
+    style N5 fill:#D0E0F8,stroke:#4285F4
+    style N6 fill:#CADEDE,stroke:#94C0C0
+    style N7 fill:#FFE88D,stroke:#FFDA4E
+    style N8 fill:#FFE88D,stroke:#FFDA4E
+    style N9 fill:#D0E0F8,stroke:#4285F4
+    style N10 fill:#CADEDE,stroke:#94C0C0
+    style N11 fill:#D0E0F8,stroke:#4285F4
+    style N12 fill:#D0E0F8,stroke:#4285F4
+    style N13 fill:#D0E0F8,stroke:#4285F4
+    style N14 fill:#CADEDE,stroke:#94C0C0
+    style N15 fill:#D0E0F8,stroke:#4285F4
+    style N16 fill:#D0E0F8,stroke:#4285F4
+    style N17 fill:#FFE88D,stroke:#FFDA4E
+    style S0 fill:#CADEDE,stroke:#94C0C0
+    style M0 fill:#FFE88D,stroke:#FFDA4E
+    style M2 fill:#FFE88D,stroke:#FFDA4E
+    style nest0_0 fill:#D0E0F8,stroke:#4285F4
+    style nest0_1 fill:#FFE88D,stroke:#FFDA4E
+    style nest0_2 fill:#FFE88D,stroke:#FFDA4E
+    style nest1_0 fill:#FFE88D,stroke:#FFDA4E
+    style nest1_1 fill:#CADEDE,stroke:#94C0C0
+    style nest1_2 fill:#CADEDE,stroke:#94C0C0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_240.txt b/test/mermaid/hard/mermaid_240.txt
new file mode 100644
index 0000000000000000000000000000000000000000..63f354353fa003840013d9769ae5b6cd23497f7f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_240.txt
@@ -0,0 +1,42 @@
+<Assessment Creation, partOf, Completion Rate Optimization>
+<Assessment Creation, provides technical support, Career Pathway Mapping>
+<Career Pathway Mapping, analyzes data, Course Retirement Planning>
+<Course Pilot Testing, complies with regulations, Instructor Recruitment for MOOCs>
+<Course Pilot Testing, connectedTo, Instructor_Led Sessions>
+<Course Pilot Testing, connectedTo, Research on MOOC Effectiveness>
+<Course Pilot Testing, connectedTo, Specialization or Professional Certificate Programs>
+<Course Promotion, connectedTo, Gamification for Engagement>
+<Course Promotion, partOf, Content Licensing>
+<Course Retirement Planning, connectedTo, Employer Recognition>
+<Employer Recognition, connectedTo, Industry Collaboration for Content>
+<Forum Moderation, connectedTo, Research on MOOC Effectiveness>
+<Gamification for Engagement, connectedTo, Research on MOOC Effectiveness>
+<Gamification for Engagement, partOf, Content Licensing>
+<Global Accessibility Features, connectedTo, Course Pilot Testing>
+<Industry Collaboration for Content, connectedTo, end>
+<Instructor Recruitment for MOOCs, connectedTo, Instructor_Led Sessions>
+<Instructor Recruitment for MOOCs, connectedTo, Learner Support>
+<Instructor Recruitment for MOOCs, connectedTo, Mobile Learning Experience>
+<Instructor Recruitment for MOOCs, connectedTo, Research on MOOC Effectiveness>
+<Instructor Recruitment for MOOCs, connectedTo, Technical Infrastructure for Scale>
+<Instructor Recruitment for MOOCs, connectedTo, end>
+<Instructor Recruitment for MOOCs, facilitates peer review, Employer Recognition>
+<Instructor_Led Sessions, connectedTo, Forum Moderation>
+<Instructor_Led Sessions, connectedTo, Research on MOOC Effectiveness>
+<Learner Analytics, connectedTo, Career Pathway Mapping>
+<Learner Feedback Analysis, connectedTo, Assessment Creation>
+<Learner Feedback Analysis, partOf, Completion Rate Optimization>
+<Learner Support, connectedTo, Technical Infrastructure for Scale>
+<Micro_credential Stacking, connectedTo, Global Accessibility Features>
+<Micro_credential Stacking, connectedTo, Instructor_Led Sessions>
+<Micro_credential Stacking, connectedTo, Research on MOOC Effectiveness>
+<Mobile Learning Experience, optimizes engagement, Instructor_Led Sessions>
+<Peer Grading Implementation, connectedTo, Course Promotion>
+<Peer Grading Implementation, partOf, Content Licensing>
+<Platform Selection, connectedTo, Self_Paced Learning Tracks>
+<Research on MOOC Effectiveness, connectedTo, Learner Support>
+<Self_Paced Learning Tracks, connectedTo, Learner Analytics>
+<Self_Paced Learning Tracks, connectedTo, Peer Grading Implementation>
+<Specialization or Professional Certificate Programs, connectedTo, Learner Feedback Analysis>
+<Specialization or Professional Certificate Programs, partOf, Completion Rate Optimization>
+<Technical Infrastructure for Scale, connectedTo, Platform Selection>
diff --git a/test/mermaid/hard/mermaid_241.mmd b/test/mermaid/hard/mermaid_241.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..7f621a8c1920b2640d0c459cc4d688107a65cafe
--- /dev/null
+++ b/test/mermaid/hard/mermaid_241.mmd
@@ -0,0 +1,114 @@
+graph BT
+    N0([start])
+    N1[English Proficiency Test Prep]
+    N2[Interactive Exercises]
+    N3[Diagnostic Assessment]
+    N4[Study Material Design]
+    N5[Virtual Proctoring]
+    N6(Motivation Coaching)
+    N7[Student Progress Tracking]
+    N8(Writing Skills Improvement)
+    N9{Curriculum Development}
+    N10[/College Entrance Exam Prep/]
+    N11[[Subject Matter Review]]
+    N12(Parent or Guardian Updates)
+    N13([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Study Group Facilitation
+        nest0_0{History Topic Mastery}
+        nest0_1[Adaptive Learning Algorithms]
+    end
+    subgraph Exam Day Tips
+        nest1_0([Question Bank Management])
+        nest1_1(Critical Thinking Development)
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> |no| N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 -.-> N13
+    nest0_0 -.-> nest0_1
+    N12 -.-> nest0_0
+    nest0_1 -.-> N8
+    nest1_0 -.-> nest1_1
+    N1 -.-> nest1_0
+    nest1_1 --> N12
+    N2 --> S0
+    S0 -.-> N5
+    S0 -.-> N6
+    S0 -.-> N11
+    S0 --> N13
+    N4 --> S1
+    S1 --> N6
+    S1 -.-> N7
+    N3 -.-> S2
+    S2 --> N8
+    S2 -.-> N13
+    S2 --> N5
+    S2 --> N10
+    N6 --> M1
+    N4 --> M1
+    N2 -.-> M1
+    M1 -.-> N10
+    N6 -.-> M2
+    N1 --> M2
+    N3 --> M2
+    M2 -.-> N8
+    style S0 fill:#FFFDE0,stroke:#FFF8A6
+    style S1 fill:#FFEBEE,stroke:#E57373
+    style S2 fill:#FFEBEE,stroke:#E57373
+    style M1 fill:#FFEBEE,stroke:#E57373
+    style M2 fill:#FFFDE0,stroke:#FFF8A6
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FFF8A6,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_241.txt b/test/mermaid/hard/mermaid_241.txt
new file mode 100644
index 0000000000000000000000000000000000000000..2b145c0864772ab096439a79ba8a3e5fe082fcab
--- /dev/null
+++ b/test/mermaid/hard/mermaid_241.txt
@@ -0,0 +1,38 @@
+<Adaptive Learning Algorithms, connectedTo, Writing Skills Improvement>
+<Adaptive Learning Algorithms, partOf, Study Group Facilitation>
+<College Entrance Exam Prep, connectedTo, Subject Matter Review>
+<Critical Thinking Development, connectedTo, Parent or Guardian Updates>
+<Critical Thinking Development, partOf, Exam Day Tips>
+<Curriculum Development, connectedTo, College Entrance Exam Prep>
+<Diagnostic Assessment, connectedTo, College Entrance Exam Prep>
+<Diagnostic Assessment, connectedTo, Virtual Proctoring>
+<Diagnostic Assessment, connectedTo, Writing Skills Improvement>
+<Diagnostic Assessment, connectedTo, end>
+<Diagnostic Assessment, no, Study Material Design>
+<English Proficiency Test Prep, connectedTo, Interactive Exercises>
+<English Proficiency Test Prep, connectedTo, Question Bank Management>
+<English Proficiency Test Prep, connectedTo, Writing Skills Improvement>
+<History Topic Mastery, connectedTo, Adaptive Learning Algorithms>
+<History Topic Mastery, partOf, Study Group Facilitation>
+<Interactive Exercises, connectedTo, College Entrance Exam Prep>
+<Interactive Exercises, connectedTo, Diagnostic Assessment>
+<Interactive Exercises, connectedTo, Motivation Coaching>
+<Interactive Exercises, connectedTo, Subject Matter Review>
+<Interactive Exercises, connectedTo, Virtual Proctoring>
+<Interactive Exercises, connectedTo, end>
+<Motivation Coaching, connectedTo, College Entrance Exam Prep>
+<Motivation Coaching, connectedTo, Student Progress Tracking>
+<Motivation Coaching, connectedTo, Writing Skills Improvement>
+<Parent or Guardian Updates, connectedTo, History Topic Mastery>
+<Parent or Guardian Updates, connectedTo, end>
+<Question Bank Management, connectedTo, Critical Thinking Development>
+<Question Bank Management, partOf, Exam Day Tips>
+<Student Progress Tracking, connectedTo, Writing Skills Improvement>
+<Study Material Design, connectedTo, College Entrance Exam Prep>
+<Study Material Design, connectedTo, Motivation Coaching>
+<Study Material Design, connectedTo, Student Progress Tracking>
+<Study Material Design, connectedTo, Virtual Proctoring>
+<Subject Matter Review, connectedTo, Parent or Guardian Updates>
+<Virtual Proctoring, connectedTo, Motivation Coaching>
+<Writing Skills Improvement, connectedTo, Curriculum Development>
+<start, connectedTo, English Proficiency Test Prep>
diff --git a/test/mermaid/hard/mermaid_242.mmd b/test/mermaid/hard/mermaid_242.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..4011bf16c2e22f696865d6930813526cfb9d45d8
--- /dev/null
+++ b/test/mermaid/hard/mermaid_242.mmd
@@ -0,0 +1,112 @@
+graph BT
+    N0([Mock Exam Administration])
+    N1[Question Bank Management]
+    N2[Performance Feedback]
+    N3{Critical Thinking Development}
+    N4([College Entrance Exam Prep])
+    N5(Student Progress Tracking)
+    N6(English Proficiency Test Prep)
+    N7[/Test_Taking Strategies/]
+    N8{Adaptive Learning Algorithms}
+    N9[(Certification Exam Prep)]
+    N10[[Score Analysis]]
+    N11([Performance Prediction Models])
+    N12([Stress Management for Exams])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    subgraph Reading Comprehension Drills
+        nest0_0[(Graduate School Exam Prep)]
+        nest0_1[/Tutoring Session/]
+        nest0_2[[Exam Day Tips]]
+    end
+    subgraph Interactive Exercises
+        nest1_0(Study Environment Optimization)
+        nest1_1[[History Topic Mastery]]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> N12
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N1 --> nest0_0
+    nest0_2 -.-> N5
+    nest1_0 -.-> nest1_1
+    N1 --> nest1_0
+    nest1_1 --> N8
+    N8 -.-> S0
+    S0 -.-> N11
+    S0 --> N10
+    N1 -.-> S1
+    S1 --> N11
+    S1 -.-> N3
+    N7 -.-> S2
+    S2 -.-> N10
+    S2 -.-> N11
+    N0 --> M0
+    N1 --> M0
+    M0 -.-> N3
+    style N0 fill:#FFF3E0,stroke:#FFA726
+    style N1 fill:#CFD8DC,stroke:#607D8B
+    style N2 fill:#FFCCBC,stroke:#FF5722
+    style N3 fill:#FFF3E0,stroke:#FFA726
+    style N4 fill:#FFF3E0,stroke:#FFA726
+    style N5 fill:#CFD8DC,stroke:#607D8B
+    style N6 fill:#CFD8DC,stroke:#607D8B
+    style N7 fill:#CFD8DC,stroke:#607D8B
+    style N8 fill:#CFD8DC,stroke:#607D8B
+    style N9 fill:#FFCCBC,stroke:#FF5722
+    style N10 fill:#FFCCBC,stroke:#FF5722
+    style N11 fill:#FFF3E0,stroke:#FFA726
+    style N12 fill:#FFF3E0,stroke:#FFA726
+    style S0 fill:#CFD8DC,stroke:#607D8B
+    style S1 fill:#FFF3E0,stroke:#FFA726
+    style S2 fill:#CFD8DC,stroke:#607D8B
+    style M0 fill:#FFF3E0,stroke:#FFA726
+    style nest0_0 fill:#FFF3E0,stroke:#FFA726
+    style nest0_1 fill:#FFF3E0,stroke:#FFA726
+    style nest0_2 fill:#CFD8DC,stroke:#607D8B
+    style nest1_0 fill:#CFD8DC,stroke:#607D8B
+    style nest1_1 fill:#FFCCBC,stroke:#FF5722
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_242.txt b/test/mermaid/hard/mermaid_242.txt
new file mode 100644
index 0000000000000000000000000000000000000000..22ae63d404ee99f428e442055ac13fab10ddfff2
--- /dev/null
+++ b/test/mermaid/hard/mermaid_242.txt
@@ -0,0 +1,31 @@
+<Adaptive Learning Algorithms, connectedTo, Certification Exam Prep>
+<Adaptive Learning Algorithms, connectedTo, Performance Prediction Models>
+<Adaptive Learning Algorithms, connectedTo, Score Analysis>
+<Certification Exam Prep, connectedTo, Score Analysis>
+<College Entrance Exam Prep, connectedTo, Student Progress Tracking>
+<Critical Thinking Development, connectedTo, College Entrance Exam Prep>
+<English Proficiency Test Prep, connectedTo, Test_Taking Strategies>
+<Exam Day Tips, connectedTo, Student Progress Tracking>
+<Exam Day Tips, partOf, Reading Comprehension Drills>
+<Graduate School Exam Prep, connectedTo, Tutoring Session>
+<Graduate School Exam Prep, partOf, Reading Comprehension Drills>
+<History Topic Mastery, connectedTo, Adaptive Learning Algorithms>
+<History Topic Mastery, partOf, Interactive Exercises>
+<Mock Exam Administration, connectedTo, Critical Thinking Development>
+<Mock Exam Administration, connectedTo, Question Bank Management>
+<Performance Feedback, connectedTo, Critical Thinking Development>
+<Performance Prediction Models, connectedTo, Stress Management for Exams>
+<Question Bank Management, connectedTo, Critical Thinking Development>
+<Question Bank Management, connectedTo, Graduate School Exam Prep>
+<Question Bank Management, connectedTo, Performance Feedback>
+<Question Bank Management, connectedTo, Performance Prediction Models>
+<Question Bank Management, connectedTo, Study Environment Optimization>
+<Score Analysis, connectedTo, Performance Prediction Models>
+<Student Progress Tracking, connectedTo, English Proficiency Test Prep>
+<Study Environment Optimization, connectedTo, History Topic Mastery>
+<Study Environment Optimization, partOf, Interactive Exercises>
+<Test_Taking Strategies, connectedTo, Adaptive Learning Algorithms>
+<Test_Taking Strategies, connectedTo, Performance Prediction Models>
+<Test_Taking Strategies, connectedTo, Score Analysis>
+<Tutoring Session, connectedTo, Exam Day Tips>
+<Tutoring Session, partOf, Reading Comprehension Drills>
diff --git a/test/mermaid/hard/mermaid_243.txt b/test/mermaid/hard/mermaid_243.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7a0d951b718c6097e454d55df0302ab7786e4dde
--- /dev/null
+++ b/test/mermaid/hard/mermaid_243.txt
@@ -0,0 +1,38 @@
+<AI_Powered Tutoring, connectedTo, Diagnostic Assessment>
+<AI_Powered Tutoring, partOf, Practice Test Creation>
+<Adaptive Learning Algorithms, connectedTo, AI_Powered Tutoring>
+<Adaptive Learning Algorithms, connectedTo, Certification Exam Prep>
+<Adaptive Learning Algorithms, connectedTo, History Topic Mastery>
+<Adaptive Learning Algorithms, connectedTo, Mock Exam Administration>
+<Adaptive Learning Algorithms, connectedTo, Test_Taking Strategies>
+<Certification Exam Prep, develops, Test_Taking Strategies>
+<Diagnostic Assessment, connectedTo, Performance Feedback>
+<Diagnostic Assessment, partOf, Practice Test Creation>
+<Exam Day Tips, connectedTo, Personalized Study Plans>
+<Flashcard Creation, connectedTo, History Topic Mastery>
+<Flashcard Creation, scores, Exam Day Tips>
+<Graduate School Exam Prep, connectedTo, Adaptive Learning Algorithms>
+<Graduate School Exam Prep, partOf, Motivation Coaching>
+<History Topic Mastery, connectedTo, Certification Exam Prep>
+<Interactive Exercises, connectedTo, Graduate School Exam Prep>
+<Interactive Exercises, partOf, Motivation Coaching>
+<Math Skills Refresher, connectedTo, Study Environment Optimization>
+<Mock Exam Administration, connectedTo, History Topic Mastery>
+<Performance Feedback, connectedTo, Writing Skills Improvement>
+<Performance Feedback, partOf, Practice Test Creation>
+<Performance Prediction Models, connectedTo, Flashcard Creation>
+<Personalized Study Plans, connectedTo, Video Lecture Production>
+<Science Concept Review, connectedTo, Math Skills Refresher>
+<Study Environment Optimization, connectedTo, English Proficiency Test Prep>
+<Study Material Design, connectedTo, Adaptive Learning Algorithms>
+<Study Material Design, connectedTo, Interactive Exercises>
+<Test_Taking Strategies, connectedTo, Science Concept Review>
+<Tutoring Session, accelerates, Study Material Design>
+<Video Lecture Production, connectedTo, History Topic Mastery>
+<Video Lecture Production, connectedTo, Tutoring Session>
+<Writing Skills Improvement, connectedTo, Tutoring Session>
+<Writing Skills Improvement, partOf, Practice Test Creation>
+<start, connectedTo, English Proficiency Test Prep>
+<start, connectedTo, Performance Prediction Models>
+<start, remediates, Study Environment Optimization>
+<start, tracks, Flashcard Creation>
diff --git a/test/mermaid/hard/mermaid_244.mmd b/test/mermaid/hard/mermaid_244.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..5c28d510826b091321d59078aeb8198ba8f3d25d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_244.mmd
@@ -0,0 +1,114 @@
+graph LR
+    N0([start])
+    N1{Business Language Training}
+    N2[[Progress Tracking]]
+    N3[/Audio Lessons/]
+    N4(Online Tutoring Sessions)
+    N5{Adult Language Learning}
+    N6(Language Assessment Tests)
+    N7{Interactive Dialogues}
+    N8([Contextual Learning])
+    N9[/Reading Comprehension/]
+    N10[[Translation Exercises]]
+    S0(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Speaking Practice
+        nest0_0[(Slang and Idioms Learning)]
+        nest0_1[[Accent Reduction Coaching]]
+        nest0_2(Language for Specific Purposes)
+        nest0_3[[Pronunciation Drills]]
+    end
+    subgraph Personalized Learning Paths
+        nest1_0[/Flashcard Systems/]
+        nest1_1{Native Speaker Interaction}
+        nest1_2[(Certification Exam Preparation)]
+    end
+    N0 --> |translates| N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> |markets| N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N1 --> |motivates| nest0_0
+    nest0_3 --> N3
+    nest1_0 -.-> |teaches| nest1_1
+    nest1_1 --> |evaluates| nest1_2
+    N9 --> nest1_0
+    nest1_2 -.-> N9
+    N0 -.-> S0
+    S0 -.-> N7
+    S0 --> N3
+    S0 -.-> N4
+    N3 -.-> S2
+    S2 --> N5
+    S2 -.-> N8
+    N2 --> M0
+    N1 -.-> M0
+    M0 --> N6
+    N4 --> M1
+    N5 --> M1
+    M1 --> N10
+    style N0 fill:#FFF9D4,stroke:#FFE69C
+    style N1 fill:#D1C4E9,stroke:#673AB7
+    style N2 fill:#D0E0F8,stroke:#4285F4
+    style N3 fill:#FFF9D4,stroke:#FFE69C
+    style N4 fill:#D0E0F8,stroke:#4285F4
+    style N5 fill:#D1C4E9,stroke:#673AB7
+    style N6 fill:#D0E0F8,stroke:#4285F4
+    style N7 fill:#D1C4E9,stroke:#673AB7
+    style N8 fill:#FFF9D4,stroke:#FFE69C
+    style N9 fill:#D1C4E9,stroke:#673AB7
+    style N10 fill:#D0E0F8,stroke:#4285F4
+    style S0 fill:#D0E0F8,stroke:#4285F4
+    style S2 fill:#D1C4E9,stroke:#673AB7
+    style M0 fill:#D1C4E9,stroke:#673AB7
+    style M1 fill:#FFF9D4,stroke:#FFE69C
+    style nest0_0 fill:#D0E0F8,stroke:#4285F4
+    style nest0_1 fill:#D0E0F8,stroke:#4285F4
+    style nest0_2 fill:#FFF9D4,stroke:#FFE69C
+    style nest0_3 fill:#FFF9D4,stroke:#FFE69C
+    style nest1_0 fill:#D0E0F8,stroke:#4285F4
+    style nest1_1 fill:#FFF9D4,stroke:#FFE69C
+    style nest1_2 fill:#D0E0F8,stroke:#4285F4
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFE69C,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_244.txt b/test/mermaid/hard/mermaid_244.txt
new file mode 100644
index 0000000000000000000000000000000000000000..fdca96365875dc19772aa40c666aabf12bbbadb0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_244.txt
@@ -0,0 +1,35 @@
+<Accent Reduction Coaching, connectedTo, Language for Specific Purposes>
+<Accent Reduction Coaching, partOf, Speaking Practice>
+<Adult Language Learning, connectedTo, Language Assessment Tests>
+<Adult Language Learning, connectedTo, Translation Exercises>
+<Audio Lessons, connectedTo, Adult Language Learning>
+<Audio Lessons, connectedTo, Contextual Learning>
+<Audio Lessons, connectedTo, Online Tutoring Sessions>
+<Business Language Training, connectedTo, Language Assessment Tests>
+<Business Language Training, connectedTo, Progress Tracking>
+<Business Language Training, motivates, Slang and Idioms Learning>
+<Certification Exam Preparation, connectedTo, Reading Comprehension>
+<Certification Exam Preparation, partOf, Personalized Learning Paths>
+<Contextual Learning, connectedTo, Reading Comprehension>
+<Flashcard Systems, partOf, Personalized Learning Paths>
+<Flashcard Systems, teaches, Native Speaker Interaction>
+<Interactive Dialogues, connectedTo, Contextual Learning>
+<Language Assessment Tests, markets, Interactive Dialogues>
+<Language for Specific Purposes, connectedTo, Pronunciation Drills>
+<Language for Specific Purposes, partOf, Speaking Practice>
+<Native Speaker Interaction, evaluates, Certification Exam Preparation>
+<Native Speaker Interaction, partOf, Personalized Learning Paths>
+<Online Tutoring Sessions, connectedTo, Adult Language Learning>
+<Online Tutoring Sessions, connectedTo, Translation Exercises>
+<Progress Tracking, connectedTo, Audio Lessons>
+<Progress Tracking, connectedTo, Language Assessment Tests>
+<Pronunciation Drills, connectedTo, Audio Lessons>
+<Pronunciation Drills, partOf, Speaking Practice>
+<Reading Comprehension, connectedTo, Flashcard Systems>
+<Reading Comprehension, connectedTo, Translation Exercises>
+<Slang and Idioms Learning, connectedTo, Accent Reduction Coaching>
+<Slang and Idioms Learning, partOf, Speaking Practice>
+<start, connectedTo, Audio Lessons>
+<start, connectedTo, Interactive Dialogues>
+<start, connectedTo, Online Tutoring Sessions>
+<start, translates, Business Language Training>
diff --git a/test/mermaid/hard/mermaid_245.mmd b/test/mermaid/hard/mermaid_245.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..cce4b10023a31fbdfaa4e4af915e86981ddf7ab6
--- /dev/null
+++ b/test/mermaid/hard/mermaid_245.mmd
@@ -0,0 +1,102 @@
+graph RL
+    N0([start])
+    N1(Listening Comprehension)
+    N2{Accent Reduction Coaching}
+    N3[/Virtual Reality Language Environments/]
+    N4[(Flashcard Systems)]
+    N5[(Immersion Programs)]
+    N6([Online Tutoring Sessions])
+    N7[(Gamified Learning Activities)]
+    N8{Personalized Learning Paths}
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Error Correction Feedback
+        nest0_0[[Language for Specific Purposes]]
+        nest0_1[Reading Comprehension]
+        nest0_2{Audio Lessons}
+        nest0_3[Video Lessons]
+    end
+    subgraph Memory Retention Techniques
+        nest1_0[(Curriculum Customization)]
+        nest1_1([Role_Playing Scenarios])
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> |improves| N7
+    N7 -.-> N8
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N3 -.-> nest0_0
+    nest0_3 -.-> N4
+    nest1_0 --> nest1_1
+    N6 --> |sells| nest1_0
+    nest1_1 -.-> N7
+    N3 --> S0
+    S0 --> |develops| N7
+    S0 --> N5
+    S0 --> N8
+    N3 -.-> S1
+    S1 -.-> N7
+    S1 -.-> N5
+    N3 -.-> S2
+    S2 -.-> |evaluates| N6
+    S2 -.-> N7
+    N2 --> M1
+    N1 --> |tests| M1
+    M1 -.-> N4
+    style N0 fill:#F0F0F0,stroke:#D2D2D2
+    style N1 fill:#E1F5FE,stroke:#4FC3F7
+    style N2 fill:#E1F5FE,stroke:#4FC3F7
+    style N3 fill:#E1F5FE,stroke:#4FC3F7
+    style N4 fill:#F0F0F0,stroke:#D2D2D2
+    style N5 fill:#E1F5FE,stroke:#4FC3F7
+    style N6 fill:#E1F5FE,stroke:#4FC3F7
+    style N7 fill:#F0F0F0,stroke:#D2D2D2
+    style N8 fill:#E1F5FE,stroke:#4FC3F7
+    style S0 fill:#F0F0F0,stroke:#D2D2D2
+    style S1 fill:#FFE0B2,stroke:#FF9800
+    style S2 fill:#FFE0B2,stroke:#FF9800
+    style M1 fill:#F0F0F0,stroke:#D2D2D2
+    style nest0_0 fill:#E1F5FE,stroke:#4FC3F7
+    style nest0_1 fill:#FFE0B2,stroke:#FF9800
+    style nest0_2 fill:#F0F0F0,stroke:#D2D2D2
+    style nest0_3 fill:#FFE0B2,stroke:#FF9800
+    style nest1_0 fill:#E1F5FE,stroke:#4FC3F7
+    style nest1_1 fill:#E1F5FE,stroke:#4FC3F7
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#4FC3F7,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_245.txt b/test/mermaid/hard/mermaid_245.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b98e0beca18b1dd7ea01c478b74153c3d84e133d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_245.txt
@@ -0,0 +1,29 @@
+<Accent Reduction Coaching, connectedTo, Flashcard Systems>
+<Accent Reduction Coaching, connectedTo, Virtual Reality Language Environments>
+<Audio Lessons, connectedTo, Video Lessons>
+<Audio Lessons, partOf, Error Correction Feedback>
+<Curriculum Customization, connectedTo, Role_Playing Scenarios>
+<Curriculum Customization, partOf, Memory Retention Techniques>
+<Flashcard Systems, connectedTo, Immersion Programs>
+<Gamified Learning Activities, connectedTo, Personalized Learning Paths>
+<Immersion Programs, connectedTo, Online Tutoring Sessions>
+<Language for Specific Purposes, connectedTo, Reading Comprehension>
+<Language for Specific Purposes, partOf, Error Correction Feedback>
+<Listening Comprehension, connectedTo, Accent Reduction Coaching>
+<Listening Comprehension, tests, Flashcard Systems>
+<Online Tutoring Sessions, improves, Gamified Learning Activities>
+<Online Tutoring Sessions, sells, Curriculum Customization>
+<Reading Comprehension, connectedTo, Audio Lessons>
+<Reading Comprehension, partOf, Error Correction Feedback>
+<Role_Playing Scenarios, connectedTo, Gamified Learning Activities>
+<Role_Playing Scenarios, partOf, Memory Retention Techniques>
+<Video Lessons, connectedTo, Flashcard Systems>
+<Video Lessons, partOf, Error Correction Feedback>
+<Virtual Reality Language Environments, connectedTo, Flashcard Systems>
+<Virtual Reality Language Environments, connectedTo, Gamified Learning Activities>
+<Virtual Reality Language Environments, connectedTo, Immersion Programs>
+<Virtual Reality Language Environments, connectedTo, Language for Specific Purposes>
+<Virtual Reality Language Environments, connectedTo, Personalized Learning Paths>
+<Virtual Reality Language Environments, develops, Gamified Learning Activities>
+<Virtual Reality Language Environments, evaluates, Online Tutoring Sessions>
+<start, connectedTo, Listening Comprehension>
diff --git a/test/mermaid/hard/mermaid_246.mmd b/test/mermaid/hard/mermaid_246.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..fc8da6975bb03afd440904bddb3ff2728c0cbe7c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_246.mmd
@@ -0,0 +1,110 @@
+graph LR
+    N0([start])
+    N1[Language for Specific Purposes]
+    N2[Role_Playing Scenarios]
+    N3[[Flashcard Systems]]
+    N4[/Contextual Learning/]
+    N5[(Certification Exam Preparation)]
+    N6[Vocabulary Acquisition]
+    N7[[Instructor_Led Classes]]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Listening Comprehension
+        nest0_0{Sentence Construction Practice}
+        nest0_1[/Translation Exercises/]
+        nest0_2[(Immersion Programs)]
+        nest0_3[(Self_Study Modules)]
+    end
+    subgraph Slang and Idioms Learning
+        nest1_0[(Accent Reduction Coaching)]
+        nest1_1[Error Correction Feedback]
+        nest1_2[[Video Lessons]]
+        nest1_3[[Travel Language Essentials]]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N4 -.-> nest0_0
+    nest0_3 --> N5
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N3 --> nest1_0
+    nest1_3 --> N5
+    N4 -.-> S0
+    S0 --> N7
+    S0 --> |improves| N6
+    N3 --> S1
+    S1 -.-> |automates| N7
+    S1 -.-> |speaks| N6
+    S1 --> N5
+    N0 -.-> S2
+    S2 -.-> N5
+    S2 -.-> N3
+    S2 --> N4
+    S2 -.-> N7
+    N1 --> M1
+    N3 -.-> M1
+    M1 -.-> N6
+    style N0 fill:#FBE9E7,stroke:#FF8A65
+    style N1 fill:#EDE7F6,stroke:#7E57C2
+    style N2 fill:#EDE7F6,stroke:#7E57C2
+    style N3 fill:#EBEBEB,stroke:#E0E0E0
+    style N4 fill:#EBEBEB,stroke:#E0E0E0
+    style N5 fill:#EBEBEB,stroke:#E0E0E0
+    style N6 fill:#EDE7F6,stroke:#7E57C2
+    style N7 fill:#EBEBEB,stroke:#E0E0E0
+    style S0 fill:#EBEBEB,stroke:#E0E0E0
+    style S1 fill:#EBEBEB,stroke:#E0E0E0
+    style S2 fill:#EBEBEB,stroke:#E0E0E0
+    style M1 fill:#EDE7F6,stroke:#7E57C2
+    style nest0_0 fill:#FBE9E7,stroke:#FF8A65
+    style nest0_1 fill:#EDE7F6,stroke:#7E57C2
+    style nest0_2 fill:#EDE7F6,stroke:#7E57C2
+    style nest0_3 fill:#EDE7F6,stroke:#7E57C2
+    style nest1_0 fill:#EDE7F6,stroke:#7E57C2
+    style nest1_1 fill:#EDE7F6,stroke:#7E57C2
+    style nest1_2 fill:#EDE7F6,stroke:#7E57C2
+    style nest1_3 fill:#EBEBEB,stroke:#E0E0E0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_246.txt b/test/mermaid/hard/mermaid_246.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6b0a21b0f5e3b0f93ccbac24d5da9ec0a5a5e627
--- /dev/null
+++ b/test/mermaid/hard/mermaid_246.txt
@@ -0,0 +1,36 @@
+<Accent Reduction Coaching, connectedTo, Error Correction Feedback>
+<Accent Reduction Coaching, partOf, Slang and Idioms Learning>
+<Certification Exam Preparation, connectedTo, Vocabulary Acquisition>
+<Contextual Learning, connectedTo, Certification Exam Preparation>
+<Contextual Learning, connectedTo, Instructor_Led Classes>
+<Contextual Learning, connectedTo, Sentence Construction Practice>
+<Contextual Learning, improves, Vocabulary Acquisition>
+<Error Correction Feedback, connectedTo, Video Lessons>
+<Error Correction Feedback, partOf, Slang and Idioms Learning>
+<Flashcard Systems, automates, Instructor_Led Classes>
+<Flashcard Systems, connectedTo, Accent Reduction Coaching>
+<Flashcard Systems, connectedTo, Certification Exam Preparation>
+<Flashcard Systems, connectedTo, Contextual Learning>
+<Flashcard Systems, connectedTo, Vocabulary Acquisition>
+<Flashcard Systems, speaks, Vocabulary Acquisition>
+<Immersion Programs, connectedTo, Self_Study Modules>
+<Immersion Programs, partOf, Listening Comprehension>
+<Language for Specific Purposes, connectedTo, Role_Playing Scenarios>
+<Language for Specific Purposes, connectedTo, Vocabulary Acquisition>
+<Role_Playing Scenarios, connectedTo, Flashcard Systems>
+<Self_Study Modules, connectedTo, Certification Exam Preparation>
+<Self_Study Modules, partOf, Listening Comprehension>
+<Sentence Construction Practice, connectedTo, Translation Exercises>
+<Sentence Construction Practice, partOf, Listening Comprehension>
+<Translation Exercises, connectedTo, Immersion Programs>
+<Translation Exercises, partOf, Listening Comprehension>
+<Travel Language Essentials, connectedTo, Certification Exam Preparation>
+<Travel Language Essentials, partOf, Slang and Idioms Learning>
+<Video Lessons, connectedTo, Travel Language Essentials>
+<Video Lessons, partOf, Slang and Idioms Learning>
+<Vocabulary Acquisition, connectedTo, Instructor_Led Classes>
+<start, connectedTo, Certification Exam Preparation>
+<start, connectedTo, Contextual Learning>
+<start, connectedTo, Flashcard Systems>
+<start, connectedTo, Instructor_Led Classes>
+<start, connectedTo, Language for Specific Purposes>
diff --git a/test/mermaid/hard/mermaid_247.mmd b/test/mermaid/hard/mermaid_247.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..10dca6a2ba40f8ceda7cff7da1acd9b161055662
--- /dev/null
+++ b/test/mermaid/hard/mermaid_247.mmd
@@ -0,0 +1,116 @@
+graph BT
+    N0([start])
+    N1([Relapse Prevention])
+    N2{Anxiety Management}
+    N3([Support Group Facilitation])
+    N4(Treatment Plan Development)
+    N5[/Mindfulness Practice/]
+    N6[[Eating Disorder Treatment]]
+    N7(Cognitive Behavioral Therapy)
+    N8(Post_Traumatic Stress Disorder Support)
+    N9(Telehealth Counseling)
+    N10[Therapy Session]
+    N11[(Suicide Prevention)]
+    N12[(Trauma Therapy)]
+    N13[/Grief Counseling/]
+    N14(Substance Abuse Counseling)
+    N15([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Outpatient Program Management
+        nest0_0[/Counseling Services/]
+        nest0_1{Depression Treatment}
+    end
+    subgraph Mental Health Screening
+        nest1_0(Crisis Intervention)
+        nest1_1[Dialectical Behavior Therapy]
+        nest1_2[(Digital Mental Health Tools)]
+        nest1_3[/Peer Support Programs/]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 --> N15
+    nest0_0 --> nest0_1
+    N11 --> nest0_0
+    nest0_1 -.-> N10
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> nest1_3
+    N13 -.-> nest1_0
+    nest1_3 --> N1
+    N0 --> S0
+    S0 --> N5
+    S0 --> N13
+    N0 --> S1
+    S1 --> |yes| N9
+    S1 --> N10
+    N7 --> S2
+    S2 --> |yes| N12
+    S2 -.-> N11
+    N3 --> M0
+    N1 --> M0
+    N7 --> M0
+    M0 -.-> N9
+    N0 -.-> M1
+    N1 --> M1
+    M1 --> N3
+    style S0 fill:#E1BEE7,stroke:#9C27B0
+    style S1 fill:#DACBE3,stroke:#A188D0
+    style S2 fill:#EFE6FF,stroke:#C2B2F0
+    style M0 fill:#E1BEE7,stroke:#9C27B0
+    style M1 fill:#EFE6FF,stroke:#C2B2F0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#9C27B0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_248.mmd b/test/mermaid/hard/mermaid_248.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..210be795b5a67e189f46d3a90d66fd2fbb420d5c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_248.mmd
@@ -0,0 +1,110 @@
+graph RL
+    N0([Treatment Plan Development])
+    N1[Emotional Regulation Training]
+    N2[[Mental Health Screening]]
+    N3[Suicide Prevention]
+    N4{Family Therapy}
+    N5([Outpatient Program Management])
+    N6([Peer Support Programs])
+    N7(Advocacy for Mental Health)
+    N8[Diagnosis and Assessment]
+    N9(Trauma Therapy)
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Digital Mental Health Tools
+        nest0_0(Dialectical Behavior Therapy)
+        nest0_1[Therapy Session]
+    end
+    subgraph Support Group Facilitation
+        nest1_0[Child & Adolescent Therapy]
+        nest1_1[Relapse Prevention]
+        nest1_2[(Inpatient Treatment Coordination)]
+    end
+    N0 -.-> N1
+    N1 --> |treats| N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> |manages| N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> |facilitates| N9
+    nest0_0 -.-> |consults| nest0_1
+    N4 -.-> nest0_0
+    nest0_1 --> N5
+    nest1_0 --> nest1_1
+    nest1_1 --> |records| nest1_2
+    N4 -.-> nest1_0
+    nest1_2 -.-> N7
+    N6 --> S0
+    S0 --> N9
+    S0 -.-> |audits| N8
+    N3 -.-> S1
+    S1 -.-> N6
+    S1 --> N7
+    N6 -.-> S2
+    S2 -.-> N8
+    S2 --> N9
+    N7 --> M0
+    N6 --> M0
+    M0 -.-> N9
+    N2 -.-> M1
+    N3 --> M1
+    N4 -.-> M1
+    M1 --> N6
+    style N0 fill:#EFEBE9,stroke:#A1887F
+    style N1 fill:#E8F0FF,stroke:#A2D0FF
+    style N2 fill:#EFEBE9,stroke:#A1887F
+    style N3 fill:#E8F0FF,stroke:#A2D0FF
+    style N4 fill:#F1F8E9,stroke:#388E3C
+    style N5 fill:#EFEBE9,stroke:#A1887F
+    style N6 fill:#EFEBE9,stroke:#A1887F
+    style N7 fill:#E8F0FF,stroke:#A2D0FF
+    style N8 fill:#E8F0FF,stroke:#A2D0FF
+    style N9 fill:#EFEBE9,stroke:#A1887F
+    style S0 fill:#E8F0FF,stroke:#A2D0FF
+    style S1 fill:#E8F0FF,stroke:#A2D0FF
+    style S2 fill:#EFEBE9,stroke:#A1887F
+    style M0 fill:#EFEBE9,stroke:#A1887F
+    style M1 fill:#F1F8E9,stroke:#388E3C
+    style nest0_0 fill:#EFEBE9,stroke:#A1887F
+    style nest0_1 fill:#EFEBE9,stroke:#A1887F
+    style nest1_0 fill:#EFEBE9,stroke:#A1887F
+    style nest1_1 fill:#EFEBE9,stroke:#A1887F
+    style nest1_2 fill:#E8F0FF,stroke:#A2D0FF
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#388E3C,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_248.txt b/test/mermaid/hard/mermaid_248.txt
new file mode 100644
index 0000000000000000000000000000000000000000..abf04645c01de0a4e2b3474fed089b8393afdd35
--- /dev/null
+++ b/test/mermaid/hard/mermaid_248.txt
@@ -0,0 +1,29 @@
+<Advocacy for Mental Health, connectedTo, Diagnosis and Assessment>
+<Advocacy for Mental Health, connectedTo, Trauma Therapy>
+<Child & Adolescent Therapy, connectedTo, Relapse Prevention>
+<Child & Adolescent Therapy, partOf, Support Group Facilitation>
+<Diagnosis and Assessment, facilitates, Trauma Therapy>
+<Dialectical Behavior Therapy, consults, Therapy Session>
+<Dialectical Behavior Therapy, partOf, Digital Mental Health Tools>
+<Emotional Regulation Training, treats, Mental Health Screening>
+<Family Therapy, connectedTo, Child & Adolescent Therapy>
+<Family Therapy, connectedTo, Dialectical Behavior Therapy>
+<Family Therapy, connectedTo, Peer Support Programs>
+<Family Therapy, manages, Outpatient Program Management>
+<Inpatient Treatment Coordination, connectedTo, Advocacy for Mental Health>
+<Inpatient Treatment Coordination, partOf, Support Group Facilitation>
+<Mental Health Screening, connectedTo, Peer Support Programs>
+<Mental Health Screening, connectedTo, Suicide Prevention>
+<Outpatient Program Management, connectedTo, Peer Support Programs>
+<Peer Support Programs, audits, Diagnosis and Assessment>
+<Peer Support Programs, connectedTo, Advocacy for Mental Health>
+<Peer Support Programs, connectedTo, Diagnosis and Assessment>
+<Peer Support Programs, connectedTo, Trauma Therapy>
+<Relapse Prevention, partOf, Support Group Facilitation>
+<Relapse Prevention, records, Inpatient Treatment Coordination>
+<Suicide Prevention, connectedTo, Advocacy for Mental Health>
+<Suicide Prevention, connectedTo, Family Therapy>
+<Suicide Prevention, connectedTo, Peer Support Programs>
+<Therapy Session, connectedTo, Outpatient Program Management>
+<Therapy Session, partOf, Digital Mental Health Tools>
+<Treatment Plan Development, connectedTo, Emotional Regulation Training>
diff --git a/test/mermaid/hard/mermaid_249.mmd b/test/mermaid/hard/mermaid_249.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..8cd42a4221d6011959fabb88c2d189f5e1c8f4d3
--- /dev/null
+++ b/test/mermaid/hard/mermaid_249.mmd
@@ -0,0 +1,114 @@
+graph TD
+    N0([start])
+    N1[[Cognitive Behavioral Therapy]]
+    N2([Psychiatric Evaluation])
+    N3([Stress Reduction Techniques])
+    N4[Relapse Prevention]
+    N5{Mindfulness Practice}
+    N6{Schizophrenia Management}
+    N7(Support Group Facilitation)
+    N8([Depression Treatment])
+    N9[/Counseling Services/]
+    N10(Telehealth Counseling)
+    N11[Suicide Prevention]
+    N12[(Trauma Therapy)]
+    N13[/Music Therapy/]
+    N14[[Crisis Intervention]]
+    N15(Inpatient Treatment Coordination)
+    N16[Outpatient Program Management]
+    N17([end])
+    S0(( ))
+    S1(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Art Therapy
+        nest0_0[(Medication Management)]
+        nest0_1[[Post_Traumatic Stress Disorder Support]]
+        nest0_2(Coping Skill Development)
+        nest0_3[Child & Adolescent Therapy]
+    end
+    subgraph Treatment Plan Development
+        nest1_0([Anxiety Management])
+        nest1_1[(Diagnosis and Assessment)]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 --> |yes| N14
+    N14 -.-> N15
+    N15 --> N16
+    N16 --> |yes| N17
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N14 --> nest0_0
+    nest0_3 -.-> N13
+    nest1_0 --> nest1_1
+    N9 -.-> nest1_0
+    nest1_1 -.-> |no| N14
+    N9 -.-> S0
+    S0 --> N15
+    S0 --> N17
+    N13 --> S1
+    S1 --> N16
+    S1 -.-> N15
+    N9 --> M1
+    N10 --> M1
+    N4 --> M1
+    M1 -.-> N14
+    N7 -.-> M2
+    N9 --> M2
+    M2 --> N15
+    style S0 fill:#EFEBE9,stroke:#A1887F
+    style S1 fill:#DACBE3,stroke:#A188D0
+    style M1 fill:#EFEBE9,stroke:#A1887F
+    style M2 fill:#EFEBE9,stroke:#A1887F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#A1887F,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_249.txt b/test/mermaid/hard/mermaid_249.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e50a33a5561d7487ac4ff20e5b5a1c1c2e9088cd
--- /dev/null
+++ b/test/mermaid/hard/mermaid_249.txt
@@ -0,0 +1,39 @@
+<Anxiety Management, connectedTo, Diagnosis and Assessment>
+<Anxiety Management, partOf, Treatment Plan Development>
+<Child & Adolescent Therapy, connectedTo, Music Therapy>
+<Child & Adolescent Therapy, partOf, Art Therapy>
+<Cognitive Behavioral Therapy, connectedTo, Psychiatric Evaluation>
+<Coping Skill Development, connectedTo, Child & Adolescent Therapy>
+<Coping Skill Development, partOf, Art Therapy>
+<Counseling Services, connectedTo, Anxiety Management>
+<Counseling Services, connectedTo, Crisis Intervention>
+<Counseling Services, connectedTo, Inpatient Treatment Coordination>
+<Counseling Services, connectedTo, Telehealth Counseling>
+<Counseling Services, connectedTo, end>
+<Crisis Intervention, connectedTo, Inpatient Treatment Coordination>
+<Crisis Intervention, connectedTo, Medication Management>
+<Depression Treatment, connectedTo, Counseling Services>
+<Diagnosis and Assessment, no, Crisis Intervention>
+<Diagnosis and Assessment, partOf, Treatment Plan Development>
+<Inpatient Treatment Coordination, connectedTo, Outpatient Program Management>
+<Medication Management, connectedTo, Post_Traumatic Stress Disorder Support>
+<Medication Management, partOf, Art Therapy>
+<Mindfulness Practice, connectedTo, Schizophrenia Management>
+<Music Therapy, connectedTo, Inpatient Treatment Coordination>
+<Music Therapy, connectedTo, Outpatient Program Management>
+<Music Therapy, yes, Crisis Intervention>
+<Outpatient Program Management, yes, end>
+<Post_Traumatic Stress Disorder Support, connectedTo, Coping Skill Development>
+<Post_Traumatic Stress Disorder Support, partOf, Art Therapy>
+<Psychiatric Evaluation, connectedTo, Stress Reduction Techniques>
+<Relapse Prevention, connectedTo, Crisis Intervention>
+<Relapse Prevention, connectedTo, Mindfulness Practice>
+<Schizophrenia Management, connectedTo, Support Group Facilitation>
+<Stress Reduction Techniques, connectedTo, Relapse Prevention>
+<Suicide Prevention, connectedTo, Trauma Therapy>
+<Support Group Facilitation, connectedTo, Depression Treatment>
+<Support Group Facilitation, connectedTo, Inpatient Treatment Coordination>
+<Telehealth Counseling, connectedTo, Crisis Intervention>
+<Telehealth Counseling, connectedTo, Suicide Prevention>
+<Trauma Therapy, connectedTo, Music Therapy>
+<start, connectedTo, Cognitive Behavioral Therapy>
diff --git a/test/mermaid/hard/mermaid_25.mmd b/test/mermaid/hard/mermaid_25.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..bba8d13c56656b74ac1b240adcdc6f98f9838d74
--- /dev/null
+++ b/test/mermaid/hard/mermaid_25.mmd
@@ -0,0 +1,140 @@
+graph RL
+    N0([Demand Forecasting Integration])
+    N1[[Pallet Stacking]]
+    N2[/Cross_docking/]
+    N3{Consolidation}
+    N4[Customs Clearance]
+    N5(Air Cargo Handling)
+    N6[Yard Management]
+    N7[Hub Transfer]
+    N8[[Route Assignment]]
+    N9[[Route Optimization Software]]
+    N10[(Global Trade Compliance)]
+    N11(Freight Booking)
+    N12(Last_mile Dispatch)
+    N13[(Carrier Selection)]
+    N14([Sorting Center])
+    N15(Warehouse Entry)
+    N16[Customs Declaration]
+    N17([Fleet Maintenance Scheduling])
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Packing Process
+        nest0_0[Container Loading]
+        nest0_1([Inventory Sync])
+        nest0_2[Hazardous Material Transport]
+    end
+    subgraph Barcode Scanning
+        nest1_0[[Damage Reporting]]
+        nest1_1{Package Labeling}
+        nest1_2[Delivery Confirmation]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 -.-> N16
+    N16 -.-> N17
+    nest0_0 -.-> |forecasts| nest0_1
+    nest0_1 --> nest0_2
+    N9 -.-> nest0_0
+    nest0_2 -.-> N15
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N2 --> nest1_0
+    nest1_2 --> N4
+    N10 -.-> S2
+    S2 -.-> |notifies| N14
+    S2 -.-> N16
+    S2 -.-> N12
+    S2 --> N17
+    N3 --> M0
+    N2 --> |picks up| M0
+    N4 --> M0
+    N5 --> M0
+    M0 --> N7
+    N6 -.-> M1
+    N3 --> M1
+    N4 --> M1
+    N1 --> M1
+    M1 -.-> N15
+    style N0 fill:#FFEBEB,stroke:#FFC2C2
+    style N1 fill:#FFEBEB,stroke:#FFC2C2
+    style N2 fill:#FFEBEB,stroke:#FFC2C2
+    style N3 fill:#FFEBEB,stroke:#FFC2C2
+    style N4 fill:#FCE4EC,stroke:#F06292
+    style N5 fill:#FCE4EC,stroke:#F06292
+    style N6 fill:#F2E6F5,stroke:#CB9BE1
+    style N7 fill:#FFEBEB,stroke:#FFC2C2
+    style N8 fill:#F2E6F5,stroke:#CB9BE1
+    style N9 fill:#FCE4EC,stroke:#F06292
+    style N10 fill:#FFEBEB,stroke:#FFC2C2
+    style N11 fill:#FFEBEB,stroke:#FFC2C2
+    style N12 fill:#FFEBEB,stroke:#FFC2C2
+    style N13 fill:#F2E6F5,stroke:#CB9BE1
+    style N14 fill:#FCE4EC,stroke:#F06292
+    style N15 fill:#F2E6F5,stroke:#CB9BE1
+    style N16 fill:#F2E6F5,stroke:#CB9BE1
+    style N17 fill:#FFEBEB,stroke:#FFC2C2
+    style S2 fill:#F2E6F5,stroke:#CB9BE1
+    style M0 fill:#F2E6F5,stroke:#CB9BE1
+    style M1 fill:#FFEBEB,stroke:#FFC2C2
+    style nest0_0 fill:#F2E6F5,stroke:#CB9BE1
+    style nest0_1 fill:#FCE4EC,stroke:#F06292
+    style nest0_2 fill:#FCE4EC,stroke:#F06292
+    style nest1_0 fill:#F2E6F5,stroke:#CB9BE1
+    style nest1_1 fill:#F2E6F5,stroke:#CB9BE1
+    style nest1_2 fill:#FCE4EC,stroke:#F06292
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FFC2C2,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_25.txt b/test/mermaid/hard/mermaid_25.txt
new file mode 100644
index 0000000000000000000000000000000000000000..39c795ed65c74a0074080d57adf3b35019fe53dd
--- /dev/null
+++ b/test/mermaid/hard/mermaid_25.txt
@@ -0,0 +1,43 @@
+<Air Cargo Handling, connectedTo, Hub Transfer>
+<Air Cargo Handling, connectedTo, Yard Management>
+<Carrier Selection, connectedTo, Sorting Center>
+<Consolidation, connectedTo, Customs Clearance>
+<Consolidation, connectedTo, Hub Transfer>
+<Consolidation, connectedTo, Warehouse Entry>
+<Container Loading, forecasts, Inventory Sync>
+<Container Loading, partOf, Packing Process>
+<Cross_docking, connectedTo, Consolidation>
+<Cross_docking, connectedTo, Damage Reporting>
+<Cross_docking, picks up, Hub Transfer>
+<Customs Clearance, connectedTo, Air Cargo Handling>
+<Customs Clearance, connectedTo, Hub Transfer>
+<Customs Clearance, connectedTo, Warehouse Entry>
+<Customs Declaration, connectedTo, Fleet Maintenance Scheduling>
+<Damage Reporting, connectedTo, Package Labeling>
+<Damage Reporting, partOf, Barcode Scanning>
+<Delivery Confirmation, connectedTo, Customs Clearance>
+<Delivery Confirmation, partOf, Barcode Scanning>
+<Demand Forecasting Integration, connectedTo, Pallet Stacking>
+<Freight Booking, connectedTo, Last_mile Dispatch>
+<Global Trade Compliance, connectedTo, Customs Declaration>
+<Global Trade Compliance, connectedTo, Fleet Maintenance Scheduling>
+<Global Trade Compliance, connectedTo, Freight Booking>
+<Global Trade Compliance, connectedTo, Last_mile Dispatch>
+<Global Trade Compliance, notifies, Sorting Center>
+<Hazardous Material Transport, connectedTo, Warehouse Entry>
+<Hazardous Material Transport, partOf, Packing Process>
+<Hub Transfer, connectedTo, Route Assignment>
+<Inventory Sync, connectedTo, Hazardous Material Transport>
+<Inventory Sync, partOf, Packing Process>
+<Last_mile Dispatch, connectedTo, Carrier Selection>
+<Package Labeling, connectedTo, Delivery Confirmation>
+<Package Labeling, partOf, Barcode Scanning>
+<Pallet Stacking, connectedTo, Cross_docking>
+<Pallet Stacking, connectedTo, Warehouse Entry>
+<Route Assignment, connectedTo, Route Optimization Software>
+<Route Optimization Software, connectedTo, Container Loading>
+<Route Optimization Software, connectedTo, Global Trade Compliance>
+<Sorting Center, connectedTo, Warehouse Entry>
+<Warehouse Entry, connectedTo, Customs Declaration>
+<Yard Management, connectedTo, Hub Transfer>
+<Yard Management, connectedTo, Warehouse Entry>
diff --git a/test/mermaid/hard/mermaid_250.mmd b/test/mermaid/hard/mermaid_250.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..747c96c67679efca137f7df911a37fdf565154a2
--- /dev/null
+++ b/test/mermaid/hard/mermaid_250.mmd
@@ -0,0 +1,135 @@
+graph TD
+    N0([start])
+    N1[Genetic Nutrition Counseling]
+    N2[[Sustainable Food Systems]]
+    N3(Detoxification Programs)
+    N4[/Meal Planning/]
+    N5[(Public Health Nutrition Programs)]
+    N6(Food Allergy Management)
+    N7(Sports Nutrition)
+    N8{Micronutrient Analysis}
+    N9[Personalized Nutrition Plans]
+    N10[/Child Nutrition/]
+    N11[[Maternal Nutrition]]
+    N12(Food Preparation Guidance)
+    N13(Restaurant Menu Analysis)
+    N14[/Agricultural Nutrition Impact/]
+    N15(Disease_Specific Nutrition)
+    N16(Gut Microbiome Health)
+    N17([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Nutritional Counseling
+        nest0_0(Weight Management)
+        nest0_1[Nutrigenomics Research]
+        nest0_2{Food Waste Reduction}
+        nest0_3[(Food Label Interpretation)]
+    end
+    subgraph Supplement Recommendation
+        nest1_0(Inflammation and Diet)
+        nest1_1[[Food Service Management Consulting]]
+        nest1_2(Grocery Shopping Guidance)
+    end
+    N0 -.-> |yes| N1
+    N1 -.-> |yes| N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> |yes| N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 -.-> N13
+    N13 --> N14
+    N14 --> N15
+    N15 --> |no| N16
+    N16 --> |yes| N17
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> |yes| nest0_2
+    nest0_2 --> nest0_3
+    N16 --> nest0_0
+    nest0_3 --> N7
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N2 -.-> nest1_0
+    nest1_2 --> N12
+    N3 -.-> S0
+    S0 -.-> N5
+    S0 --> N8
+    S0 --> N6
+    S0 --> |no| N14
+    N14 -.-> S1
+    S1 -.-> N17
+    S1 --> |no| N16
+    N11 --> M0
+    N6 -.-> M0
+    N5 -.-> M0
+    M0 --> N16
+    N2 -.-> |yes| M1
+    N6 --> M1
+    N8 -.-> M1
+    M1 --> N11
+    N2 --> M2
+    N3 -.-> M2
+    N9 --> M2
+    N14 -.-> M2
+    M2 -.-> N16
+    style S0 fill:#D0EFEE,stroke:#73C6BC
+    style S1 fill:#DDCEDD,stroke:#AF56A6
+    style M0 fill:#D0EFEE,stroke:#73C6BC
+    style M1 fill:#D0EFEE,stroke:#73C6BC
+    style M2 fill:#E1F5FE,stroke:#4FC3F7
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 44 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 45 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 46 stroke:#AF56A6,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_250.txt b/test/mermaid/hard/mermaid_250.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e28474e58cf0e68aa008baa4df8bb32b1a435c1e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_250.txt
@@ -0,0 +1,49 @@
+<Agricultural Nutrition Impact, connectedTo, Disease_Specific Nutrition>
+<Agricultural Nutrition Impact, connectedTo, Gut Microbiome Health>
+<Agricultural Nutrition Impact, connectedTo, end>
+<Agricultural Nutrition Impact, no, Gut Microbiome Health>
+<Child Nutrition, connectedTo, Maternal Nutrition>
+<Detoxification Programs, connectedTo, Food Allergy Management>
+<Detoxification Programs, connectedTo, Gut Microbiome Health>
+<Detoxification Programs, connectedTo, Meal Planning>
+<Detoxification Programs, connectedTo, Micronutrient Analysis>
+<Detoxification Programs, connectedTo, Public Health Nutrition Programs>
+<Detoxification Programs, no, Agricultural Nutrition Impact>
+<Disease_Specific Nutrition, no, Gut Microbiome Health>
+<Food Allergy Management, connectedTo, Gut Microbiome Health>
+<Food Allergy Management, connectedTo, Maternal Nutrition>
+<Food Allergy Management, connectedTo, Sports Nutrition>
+<Food Label Interpretation, connectedTo, Sports Nutrition>
+<Food Label Interpretation, partOf, Nutritional Counseling>
+<Food Preparation Guidance, connectedTo, Restaurant Menu Analysis>
+<Food Service Management Consulting, connectedTo, Grocery Shopping Guidance>
+<Food Service Management Consulting, partOf, Supplement Recommendation>
+<Food Waste Reduction, connectedTo, Food Label Interpretation>
+<Food Waste Reduction, partOf, Nutritional Counseling>
+<Genetic Nutrition Counseling, yes, Sustainable Food Systems>
+<Grocery Shopping Guidance, connectedTo, Food Preparation Guidance>
+<Grocery Shopping Guidance, partOf, Supplement Recommendation>
+<Gut Microbiome Health, connectedTo, Weight Management>
+<Gut Microbiome Health, yes, end>
+<Inflammation and Diet, connectedTo, Food Service Management Consulting>
+<Inflammation and Diet, partOf, Supplement Recommendation>
+<Maternal Nutrition, connectedTo, Food Preparation Guidance>
+<Maternal Nutrition, connectedTo, Gut Microbiome Health>
+<Meal Planning, connectedTo, Public Health Nutrition Programs>
+<Micronutrient Analysis, connectedTo, Maternal Nutrition>
+<Micronutrient Analysis, connectedTo, Personalized Nutrition Plans>
+<Nutrigenomics Research, partOf, Nutritional Counseling>
+<Nutrigenomics Research, yes, Food Waste Reduction>
+<Personalized Nutrition Plans, connectedTo, Child Nutrition>
+<Personalized Nutrition Plans, connectedTo, Gut Microbiome Health>
+<Public Health Nutrition Programs, connectedTo, Gut Microbiome Health>
+<Public Health Nutrition Programs, yes, Food Allergy Management>
+<Restaurant Menu Analysis, connectedTo, Agricultural Nutrition Impact>
+<Sports Nutrition, connectedTo, Micronutrient Analysis>
+<Sustainable Food Systems, connectedTo, Detoxification Programs>
+<Sustainable Food Systems, connectedTo, Gut Microbiome Health>
+<Sustainable Food Systems, connectedTo, Inflammation and Diet>
+<Sustainable Food Systems, yes, Maternal Nutrition>
+<Weight Management, connectedTo, Nutrigenomics Research>
+<Weight Management, partOf, Nutritional Counseling>
+<start, yes, Genetic Nutrition Counseling>
diff --git a/test/mermaid/hard/mermaid_251.mmd b/test/mermaid/hard/mermaid_251.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..5b7c544b95496c3198001858513b7a83055be9ae
--- /dev/null
+++ b/test/mermaid/hard/mermaid_251.mmd
@@ -0,0 +1,140 @@
+graph BT
+    N0([Food Preparation Guidance])
+    N1[(Food Label Interpretation)]
+    N2[(Agricultural Nutrition Impact)]
+    N3[Gut Microbiome Health]
+    N4([Dietary Supplement Review])
+    N5[Meal Planning]
+    N6[Genetic Nutrition Counseling]
+    N7([Food Fortification Strategies])
+    N8[Weight Management]
+    N9(Nutritional Counseling)
+    N10{Detoxification Programs}
+    N11(Micronutrient Analysis)
+    N12[Metabolism Rate Assessment]
+    N13[Food Service Management Consulting]
+    N14[Restaurant Menu Analysis]
+    N15[Personalized Nutrition Plans]
+    N16([Food Allergy Management])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Sports Nutrition
+        nest0_0(Macronutrient Tracking)
+        nest0_1[/Food Safety Education/]
+    end
+    subgraph Sustainable Food Systems
+        nest1_0[(Grocery Shopping Guidance)]
+        nest1_1(Eating Habit Modification)
+        nest1_2{Public Health Nutrition Programs}
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> |inspects| N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    N15 --> N16
+    nest0_0 -.-> nest0_1
+    N10 -.-> nest0_0
+    nest0_1 --> N15
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N7 -.-> nest1_0
+    nest1_2 --> N11
+    N9 --> S0
+    S0 --> N13
+    S0 --> N16
+    S0 -.-> N15
+    N0 --> S1
+    S1 --> N10
+    S1 -.-> N14
+    N3 -.-> S2
+    S2 -.-> N14
+    S2 -.-> N8
+    N1 -.-> M0
+    N5 -.-> M0
+    N4 -.-> M0
+    M0 -.-> N7
+    N9 --> M1
+    N1 --> M1
+    M1 --> N11
+    style N0 fill:#EDF5F3,stroke:#A1D7CD
+    style N1 fill:#F5F5DC,stroke:#BCB88A
+    style N2 fill:#F5F5DC,stroke:#BCB88A
+    style N3 fill:#BBDEFB,stroke:#2196F3
+    style N4 fill:#BBDEFB,stroke:#2196F3
+    style N5 fill:#BBDEFB,stroke:#2196F3
+    style N6 fill:#EDF5F3,stroke:#A1D7CD
+    style N7 fill:#BBDEFB,stroke:#2196F3
+    style N8 fill:#EDF5F3,stroke:#A1D7CD
+    style N9 fill:#EDF5F3,stroke:#A1D7CD
+    style N10 fill:#BBDEFB,stroke:#2196F3
+    style N11 fill:#BBDEFB,stroke:#2196F3
+    style N12 fill:#EDF5F3,stroke:#A1D7CD
+    style N13 fill:#BBDEFB,stroke:#2196F3
+    style N14 fill:#BBDEFB,stroke:#2196F3
+    style N15 fill:#F5F5DC,stroke:#BCB88A
+    style N16 fill:#F5F5DC,stroke:#BCB88A
+    style S0 fill:#EDF5F3,stroke:#A1D7CD
+    style S1 fill:#EDF5F3,stroke:#A1D7CD
+    style S2 fill:#F5F5DC,stroke:#BCB88A
+    style M0 fill:#BBDEFB,stroke:#2196F3
+    style M1 fill:#F5F5DC,stroke:#BCB88A
+    style nest0_0 fill:#BBDEFB,stroke:#2196F3
+    style nest0_1 fill:#F5F5DC,stroke:#BCB88A
+    style nest1_0 fill:#EDF5F3,stroke:#A1D7CD
+    style nest1_1 fill:#BBDEFB,stroke:#2196F3
+    style nest1_2 fill:#BBDEFB,stroke:#2196F3
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#2196F3,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_251.txt b/test/mermaid/hard/mermaid_251.txt
new file mode 100644
index 0000000000000000000000000000000000000000..20527eeaea762d8a07d8ec26030f9c460d727510
--- /dev/null
+++ b/test/mermaid/hard/mermaid_251.txt
@@ -0,0 +1,40 @@
+<Agricultural Nutrition Impact, inspects, Gut Microbiome Health>
+<Detoxification Programs, connectedTo, Macronutrient Tracking>
+<Detoxification Programs, connectedTo, Micronutrient Analysis>
+<Dietary Supplement Review, connectedTo, Food Fortification Strategies>
+<Dietary Supplement Review, connectedTo, Meal Planning>
+<Eating Habit Modification, connectedTo, Public Health Nutrition Programs>
+<Eating Habit Modification, partOf, Sustainable Food Systems>
+<Food Fortification Strategies, connectedTo, Grocery Shopping Guidance>
+<Food Fortification Strategies, connectedTo, Weight Management>
+<Food Label Interpretation, connectedTo, Agricultural Nutrition Impact>
+<Food Label Interpretation, connectedTo, Food Fortification Strategies>
+<Food Label Interpretation, connectedTo, Micronutrient Analysis>
+<Food Preparation Guidance, connectedTo, Detoxification Programs>
+<Food Preparation Guidance, connectedTo, Food Label Interpretation>
+<Food Preparation Guidance, connectedTo, Restaurant Menu Analysis>
+<Food Safety Education, connectedTo, Personalized Nutrition Plans>
+<Food Safety Education, partOf, Sports Nutrition>
+<Food Service Management Consulting, connectedTo, Restaurant Menu Analysis>
+<Genetic Nutrition Counseling, connectedTo, Food Fortification Strategies>
+<Grocery Shopping Guidance, connectedTo, Eating Habit Modification>
+<Grocery Shopping Guidance, partOf, Sustainable Food Systems>
+<Gut Microbiome Health, connectedTo, Dietary Supplement Review>
+<Gut Microbiome Health, connectedTo, Restaurant Menu Analysis>
+<Gut Microbiome Health, connectedTo, Weight Management>
+<Macronutrient Tracking, connectedTo, Food Safety Education>
+<Macronutrient Tracking, partOf, Sports Nutrition>
+<Meal Planning, connectedTo, Food Fortification Strategies>
+<Meal Planning, connectedTo, Genetic Nutrition Counseling>
+<Metabolism Rate Assessment, connectedTo, Food Service Management Consulting>
+<Micronutrient Analysis, connectedTo, Metabolism Rate Assessment>
+<Nutritional Counseling, connectedTo, Detoxification Programs>
+<Nutritional Counseling, connectedTo, Food Allergy Management>
+<Nutritional Counseling, connectedTo, Food Service Management Consulting>
+<Nutritional Counseling, connectedTo, Micronutrient Analysis>
+<Nutritional Counseling, connectedTo, Personalized Nutrition Plans>
+<Personalized Nutrition Plans, connectedTo, Food Allergy Management>
+<Public Health Nutrition Programs, connectedTo, Micronutrient Analysis>
+<Public Health Nutrition Programs, partOf, Sustainable Food Systems>
+<Restaurant Menu Analysis, connectedTo, Personalized Nutrition Plans>
+<Weight Management, connectedTo, Nutritional Counseling>
diff --git a/test/mermaid/hard/mermaid_252.mmd b/test/mermaid/hard/mermaid_252.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..53c73a29aa7e493dd93f12e77f698c5e310fad08
--- /dev/null
+++ b/test/mermaid/hard/mermaid_252.mmd
@@ -0,0 +1,152 @@
+graph RL
+    N0([Supplement Recommendation])
+    N1(Maternal Nutrition)
+    N2([Food Preparation Guidance])
+    N3(Macronutrient Tracking)
+    N4[/Grocery Shopping Guidance/]
+    N5[(Sports Nutrition)]
+    N6[(Food Allergy Management)]
+    N7(Elderly Nutrition)
+    N8([Nutritional Counseling])
+    N9([Food Label Interpretation])
+    N10([Gut Microbiome Health])
+    N11(Agricultural Nutrition Impact)
+    N12[/Sustainable Food Systems/]
+    N13[Body Composition Analysis]
+    N14[[Child Nutrition]]
+    N15([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Dietary Supplement Review
+        nest0_0(Metabolism Rate Assessment)
+        nest0_1[Food Fortification Strategies]
+    end
+    subgraph Public Health Nutrition Programs
+        nest1_0{Hydration Planning}
+        nest1_1[[Clinical Nutrition Support]]
+        nest1_2[Weight Management]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> |supports| N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    nest0_0 -.-> nest0_1
+    N2 --> nest0_0
+    nest0_1 -.-> N4
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N7 -.-> nest1_0
+    nest1_2 -.-> |measures| N13
+    N0 --> S0
+    S0 --> N12
+    S0 -.-> N4
+    S0 -.-> N10
+    N11 --> S1
+    S1 -.-> N14
+    S1 --> N15
+    N7 -.-> S2
+    S2 -.-> N12
+    S2 --> N9
+    S2 -.-> N14
+    N0 -.-> M0
+    N2 --> M0
+    N3 --> M0
+    N1 --> M0
+    M0 --> N5
+    N12 --> M1
+    N6 -.-> M1
+    N1 -.-> M1
+    M1 --> N15
+    N2 --> M2
+    N0 -.-> M2
+    N1 -.-> M2
+    M2 --> N4
+    style N0 fill:#EFEBE9,stroke:#A1887F
+    style N1 fill:#EFEBE9,stroke:#A1887F
+    style N2 fill:#E8EAF6,stroke:#7986CB
+    style N3 fill:#DED7F0,stroke:#A188DB
+    style N4 fill:#E8EAF6,stroke:#7986CB
+    style N5 fill:#EFEBE9,stroke:#A1887F
+    style N6 fill:#DED7F0,stroke:#A188DB
+    style N7 fill:#DED7F0,stroke:#A188DB
+    style N8 fill:#E8EAF6,stroke:#7986CB
+    style N9 fill:#EFEBE9,stroke:#A1887F
+    style N10 fill:#EFEBE9,stroke:#A1887F
+    style N11 fill:#DED7F0,stroke:#A188DB
+    style N12 fill:#E8EAF6,stroke:#7986CB
+    style N13 fill:#EFEBE9,stroke:#A1887F
+    style N14 fill:#DED7F0,stroke:#A188DB
+    style N15 fill:#E8EAF6,stroke:#7986CB
+    style S0 fill:#DED7F0,stroke:#A188DB
+    style S1 fill:#EFEBE9,stroke:#A1887F
+    style S2 fill:#DED7F0,stroke:#A188DB
+    style M0 fill:#DED7F0,stroke:#A188DB
+    style M1 fill:#EFEBE9,stroke:#A1887F
+    style M2 fill:#EFEBE9,stroke:#A1887F
+    style nest0_0 fill:#DED7F0,stroke:#A188DB
+    style nest0_1 fill:#E8EAF6,stroke:#7986CB
+    style nest1_0 fill:#DED7F0,stroke:#A188DB
+    style nest1_1 fill:#E8EAF6,stroke:#7986CB
+    style nest1_2 fill:#DED7F0,stroke:#A188DB
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 44 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 45 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_252.txt b/test/mermaid/hard/mermaid_252.txt
new file mode 100644
index 0000000000000000000000000000000000000000..dd57610d9e17d8478c61752e745967225cb6c3c2
--- /dev/null
+++ b/test/mermaid/hard/mermaid_252.txt
@@ -0,0 +1,44 @@
+<Agricultural Nutrition Impact, connectedTo, Child Nutrition>
+<Agricultural Nutrition Impact, connectedTo, Sustainable Food Systems>
+<Agricultural Nutrition Impact, connectedTo, end>
+<Body Composition Analysis, connectedTo, Child Nutrition>
+<Child Nutrition, connectedTo, end>
+<Clinical Nutrition Support, connectedTo, Weight Management>
+<Clinical Nutrition Support, partOf, Public Health Nutrition Programs>
+<Elderly Nutrition, connectedTo, Child Nutrition>
+<Elderly Nutrition, connectedTo, Food Label Interpretation>
+<Elderly Nutrition, connectedTo, Hydration Planning>
+<Elderly Nutrition, connectedTo, Nutritional Counseling>
+<Elderly Nutrition, connectedTo, Sustainable Food Systems>
+<Food Allergy Management, connectedTo, Elderly Nutrition>
+<Food Allergy Management, connectedTo, end>
+<Food Fortification Strategies, connectedTo, Grocery Shopping Guidance>
+<Food Fortification Strategies, partOf, Dietary Supplement Review>
+<Food Label Interpretation, connectedTo, Gut Microbiome Health>
+<Food Preparation Guidance, connectedTo, Grocery Shopping Guidance>
+<Food Preparation Guidance, connectedTo, Macronutrient Tracking>
+<Food Preparation Guidance, connectedTo, Metabolism Rate Assessment>
+<Food Preparation Guidance, connectedTo, Sports Nutrition>
+<Grocery Shopping Guidance, connectedTo, Sports Nutrition>
+<Gut Microbiome Health, connectedTo, Agricultural Nutrition Impact>
+<Hydration Planning, connectedTo, Clinical Nutrition Support>
+<Hydration Planning, partOf, Public Health Nutrition Programs>
+<Macronutrient Tracking, connectedTo, Grocery Shopping Guidance>
+<Macronutrient Tracking, connectedTo, Sports Nutrition>
+<Maternal Nutrition, connectedTo, Food Preparation Guidance>
+<Maternal Nutrition, connectedTo, Grocery Shopping Guidance>
+<Maternal Nutrition, connectedTo, Sports Nutrition>
+<Maternal Nutrition, connectedTo, end>
+<Metabolism Rate Assessment, connectedTo, Food Fortification Strategies>
+<Metabolism Rate Assessment, partOf, Dietary Supplement Review>
+<Nutritional Counseling, supports, Food Label Interpretation>
+<Sports Nutrition, connectedTo, Food Allergy Management>
+<Supplement Recommendation, connectedTo, Grocery Shopping Guidance>
+<Supplement Recommendation, connectedTo, Gut Microbiome Health>
+<Supplement Recommendation, connectedTo, Maternal Nutrition>
+<Supplement Recommendation, connectedTo, Sports Nutrition>
+<Supplement Recommendation, connectedTo, Sustainable Food Systems>
+<Sustainable Food Systems, connectedTo, Body Composition Analysis>
+<Sustainable Food Systems, connectedTo, end>
+<Weight Management, measures, Body Composition Analysis>
+<Weight Management, partOf, Public Health Nutrition Programs>
diff --git a/test/mermaid/hard/mermaid_253.mmd b/test/mermaid/hard/mermaid_253.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..227f241d31ee207b8d2c7257462fb07e5de4059f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_253.mmd
@@ -0,0 +1,122 @@
+graph LR
+    N0([start])
+    N1[/HIIT Workouts/]
+    N2([Virtual Fitness Classes])
+    N3[Rehabilitation Exercises]
+    N4([Functional Fitness Training])
+    N5[Yoga Instruction]
+    N6(Core Strengthening)
+    N7[/Running Coaching/]
+    N8(Fitness Assessment)
+    N9[/Cardiovascular Training/]
+    N10[Home Workout Programs]
+    N11([Balance and Coordination])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Mind_Body Connection
+        nest0_0([Weightlifting Techniques])
+        nest0_1(Motivation and Goal Setting)
+        nest0_2(Workout Planning)
+        nest0_3[(Posture Correction)]
+    end
+    subgraph Cross_Training
+        nest1_0{Workout Tracking Apps}
+        nest1_1[Community Fitness Challenges]
+        nest1_2[(Endurance Training)]
+        nest1_3(Group Fitness Classes)
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> |yes| N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> |no| N8
+    N8 --> N9
+    N9 --> |yes| N10
+    N10 -.-> N11
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N4 --> nest0_0
+    nest0_3 -.-> N9
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N5 --> |no| nest1_0
+    nest1_3 --> N2
+    N8 --> S0
+    S0 -.-> N11
+    S0 --> N10
+    N0 -.-> S1
+    S1 --> N9
+    S1 --> N7
+    N2 -.-> S2
+    S2 -.-> N9
+    S2 --> N10
+    N2 -.-> M0
+    N3 -.-> |yes| M0
+    N0 --> M0
+    M0 --> N6
+    N0 -.-> |no| M1
+    N3 -.-> M1
+    N4 --> M1
+    N6 --> M1
+    M1 -.-> N9
+    N1 --> M2
+    N2 --> M2
+    M2 -.-> N5
+    style S0 fill:#FFF3E0,stroke:#FFA726
+    style S1 fill:#FFF3E0,stroke:#FFA726
+    style S2 fill:#FFF8E1,stroke:#FFD54F
+    style M0 fill:#FFF8E1,stroke:#FFD54F
+    style M1 fill:#FFF8E1,stroke:#FFD54F
+    style M2 fill:#FFF8E1,stroke:#FFD54F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_253.txt b/test/mermaid/hard/mermaid_253.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e6640640f0c6f25bc2c1b242d2a877b7ac62fc19
--- /dev/null
+++ b/test/mermaid/hard/mermaid_253.txt
@@ -0,0 +1,44 @@
+<Cardiovascular Training, yes, Home Workout Programs>
+<Community Fitness Challenges, connectedTo, Endurance Training>
+<Community Fitness Challenges, partOf, Cross_Training>
+<Core Strengthening, connectedTo, Cardiovascular Training>
+<Core Strengthening, connectedTo, Running Coaching>
+<Endurance Training, connectedTo, Group Fitness Classes>
+<Endurance Training, partOf, Cross_Training>
+<Fitness Assessment, connectedTo, Balance and Coordination>
+<Fitness Assessment, connectedTo, Cardiovascular Training>
+<Fitness Assessment, connectedTo, Home Workout Programs>
+<Functional Fitness Training, connectedTo, Cardiovascular Training>
+<Functional Fitness Training, connectedTo, Weightlifting Techniques>
+<Functional Fitness Training, connectedTo, Yoga Instruction>
+<Group Fitness Classes, connectedTo, Virtual Fitness Classes>
+<Group Fitness Classes, partOf, Cross_Training>
+<HIIT Workouts, connectedTo, Virtual Fitness Classes>
+<HIIT Workouts, connectedTo, Yoga Instruction>
+<Home Workout Programs, connectedTo, Balance and Coordination>
+<Motivation and Goal Setting, connectedTo, Workout Planning>
+<Motivation and Goal Setting, partOf, Mind_Body Connection>
+<Posture Correction, connectedTo, Cardiovascular Training>
+<Posture Correction, partOf, Mind_Body Connection>
+<Rehabilitation Exercises, connectedTo, Cardiovascular Training>
+<Rehabilitation Exercises, yes, Core Strengthening>
+<Rehabilitation Exercises, yes, Functional Fitness Training>
+<Running Coaching, no, Fitness Assessment>
+<Virtual Fitness Classes, connectedTo, Cardiovascular Training>
+<Virtual Fitness Classes, connectedTo, Core Strengthening>
+<Virtual Fitness Classes, connectedTo, Home Workout Programs>
+<Virtual Fitness Classes, connectedTo, Rehabilitation Exercises>
+<Virtual Fitness Classes, connectedTo, Yoga Instruction>
+<Weightlifting Techniques, connectedTo, Motivation and Goal Setting>
+<Weightlifting Techniques, partOf, Mind_Body Connection>
+<Workout Planning, connectedTo, Posture Correction>
+<Workout Planning, partOf, Mind_Body Connection>
+<Workout Tracking Apps, connectedTo, Community Fitness Challenges>
+<Workout Tracking Apps, partOf, Cross_Training>
+<Yoga Instruction, connectedTo, Core Strengthening>
+<Yoga Instruction, no, Workout Tracking Apps>
+<start, connectedTo, Cardiovascular Training>
+<start, connectedTo, Core Strengthening>
+<start, connectedTo, HIIT Workouts>
+<start, connectedTo, Running Coaching>
+<start, no, Cardiovascular Training>
diff --git a/test/mermaid/hard/mermaid_255.mmd b/test/mermaid/hard/mermaid_255.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..d975a6a63a57ce797ce7700849c76e1c1aff33af
--- /dev/null
+++ b/test/mermaid/hard/mermaid_255.mmd
@@ -0,0 +1,116 @@
+graph TD
+    N0([start])
+    N1(Workout Planning)
+    N2[/Balance and Coordination/]
+    N3[Cross_Training]
+    N4(Running Coaching)
+    N5(Online Fitness Coaching)
+    N6[(Injury Prevention)]
+    N7[[Youth Fitness Programs]]
+    N8[Corporate Wellness Programs]
+    N9(Core Strengthening)
+    N10[(Endurance Training)]
+    N11[(Body Composition Analysis)]
+    N12{Personal Training}
+    N13[[Mind_Body Connection]]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Hydration for Exercise
+        nest0_0(Posture Correction)
+        nest0_1[[Yoga Instruction]]
+    end
+    subgraph Motivation and Goal Setting
+        nest1_0([Virtual Fitness Classes])
+        nest1_1[[Outdoor Fitness Activities]]
+        nest1_2[/Fitness Equipment Maintenance/]
+        nest1_3([Group Fitness Classes])
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> |no| N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> |no| N10
+    N10 --> N11
+    N11 --> N12
+    N12 -.-> N13
+    nest0_0 -.-> |no| nest0_1
+    N9 --> nest0_0
+    nest0_1 -.-> N12
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> nest1_3
+    N5 -.-> nest1_0
+    nest1_3 --> N9
+    N6 -.-> S0
+    S0 -.-> N11
+    S0 --> N12
+    N8 --> S1
+    S1 --> N12
+    S1 --> N10
+    S1 -.-> N13
+    N2 --> M0
+    N1 -.-> M0
+    N3 --> M0
+    M0 --> N6
+    N3 --> M1
+    N1 -.-> |yes| M1
+    N0 -.-> M1
+    M1 --> N7
+    N1 --> M2
+    N0 -.-> M2
+    N3 --> M2
+    M2 --> N7
+    style S0 fill:#C8E6C9,stroke:#388E3C
+    style S1 fill:#C2E8E6,stroke:#61CAC3
+    style M0 fill:#C8E6C9,stroke:#388E3C
+    style M1 fill:#FFF3E0,stroke:#FFA726
+    style M2 fill:#C2E8E6,stroke:#61CAC3
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#388E3C,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_256.txt b/test/mermaid/hard/mermaid_256.txt
new file mode 100644
index 0000000000000000000000000000000000000000..aed50e57a8a6c2a686bdf5fdb18bed7e16f70f76
--- /dev/null
+++ b/test/mermaid/hard/mermaid_256.txt
@@ -0,0 +1,44 @@
+<Acupuncture Consultation, connectedTo, Financial Wellness Planning>
+<Alternative Therapies, connectedTo, Work_Life Balance Coaching>
+<Biofeedback Training, connectedTo, Detox Programs>
+<Biofeedback Training, connectedTo, Gut Health for Wellness>
+<Breathwork Exercises, connectedTo, Self_Care Routine Development>
+<Breathwork Exercises, partOf, Holistic Health Assessment>
+<Chiropractic Care, yes, Acupuncture Consultation>
+<Detox Programs, connectedTo, Acupuncture Consultation>
+<Detox Programs, connectedTo, Chiropractic Care>
+<Employee Wellness Programs, connectedTo, end>
+<Financial Wellness Planning, connectedTo, Mindfulness Practice>
+<Gratitude Practice, connectedTo, Spiritual Exploration>
+<Gut Health for Wellness, connectedTo, Sleep Optimization>
+<Gut Health for Wellness, partOf, Stress Management>
+<Immune System Support, connectedTo, Employee Wellness Programs>
+<Massage Therapy, connectedTo, Biofeedback Training>
+<Massage Therapy, yes, Detox Programs>
+<Meditation Coaching, connectedTo, Detox Programs>
+<Meditation Coaching, connectedTo, Gratitude Practice>
+<Mindfulness Practice, connectedTo, Breathwork Exercises>
+<Mindfulness Practice, connectedTo, Employee Wellness Programs>
+<Mindfulness Practice, connectedTo, Immune System Support>
+<Mindfulness Practice, connectedTo, end>
+<Physical Activity Planning, connectedTo, Alternative Therapies>
+<Physical Activity Planning, connectedTo, Gratitude Practice>
+<Proactive Health Management, connectedTo, Acupuncture Consultation>
+<Proactive Health Management, connectedTo, Detox Programs>
+<Proactive Health Management, connectedTo, Immune System Support>
+<Proactive Health Management, connectedTo, Massage Therapy>
+<Proactive Health Management, connectedTo, Meditation Coaching>
+<Proactive Health Management, connectedTo, Mindfulness Practice>
+<Resilience Building, connectedTo, Immune System Support>
+<Resilience Building, partOf, Stress Management>
+<Self_Care Routine Development, connectedTo, Immune System Support>
+<Self_Care Routine Development, partOf, Holistic Health Assessment>
+<Sleep Optimization, connectedTo, Resilience Building>
+<Sleep Optimization, partOf, Stress Management>
+<Spiritual Exploration, connectedTo, Acupuncture Consultation>
+<Spiritual Exploration, connectedTo, Massage Therapy>
+<Work_Life Balance Coaching, connectedTo, Detox Programs>
+<Work_Life Balance Coaching, connectedTo, Gratitude Practice>
+<Work_Life Balance Coaching, connectedTo, Proactive Health Management>
+<start, connectedTo, Gratitude Practice>
+<start, connectedTo, Physical Activity Planning>
diff --git a/test/mermaid/hard/mermaid_257.mmd b/test/mermaid/hard/mermaid_257.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..c1b3a0265e367a038d91f1a0ac858473da5fc04d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_257.mmd
@@ -0,0 +1,112 @@
+graph TD
+    N0([start])
+    N1{Self_Care Routine Development}
+    N2(Wellness Retreat Planning)
+    N3(Community Wellness Programs)
+    N4{Breathwork Exercises}
+    N5{Meditation Coaching}
+    N6[Acupuncture Consultation]
+    N7(Journaling for Wellness)
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Physical Activity Planning
+        nest0_0[/Hydrotherapy/]
+        nest0_1[[Environmental Wellness]]
+        nest0_2[(Personal Growth Planning)]
+    end
+    subgraph Detox Programs
+        nest1_0[[Massage Therapy]]
+        nest1_1[Emotional Well_being]
+        nest1_2[Employee Wellness Programs]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> |eats| N6
+    N6 -.-> N7
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N6 -.-> nest0_0
+    nest0_2 --> N5
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> |integrates| nest1_2
+    N1 --> nest1_0
+    nest1_2 --> N7
+    N3 -.-> S0
+    S0 --> N7
+    S0 -.-> N6
+    S0 -.-> N5
+    N0 --> S1
+    S1 -.-> N4
+    S1 --> |reduces| N3
+    S1 --> N2
+    N0 --> S2
+    S2 -.-> N2
+    S2 -.-> N3
+    S2 -.-> N5
+    S2 --> N7
+    N1 -.-> M0
+    N0 -.-> M0
+    M0 --> N3
+    N2 -.-> M2
+    N0 --> M2
+    M2 -.-> N5
+    style N0 fill:#E3F2FD,stroke:#64B5F6
+    style N1 fill:#D1C4E9,stroke:#7E57C2
+    style N2 fill:#E3F2FD,stroke:#64B5F6
+    style N3 fill:#E3F2FD,stroke:#64B5F6
+    style N4 fill:#FFFAE0,stroke:#FFE470
+    style N5 fill:#E3F2FD,stroke:#64B5F6
+    style N6 fill:#FFFAE0,stroke:#FFE470
+    style N7 fill:#E3F2FD,stroke:#64B5F6
+    style S0 fill:#FFFAE0,stroke:#FFE470
+    style S1 fill:#E3F2FD,stroke:#64B5F6
+    style S2 fill:#E3F2FD,stroke:#64B5F6
+    style M0 fill:#D1C4E9,stroke:#7E57C2
+    style M2 fill:#FFFAE0,stroke:#FFE470
+    style nest0_0 fill:#E3F2FD,stroke:#64B5F6
+    style nest0_1 fill:#FFFAE0,stroke:#FFE470
+    style nest0_2 fill:#FFFAE0,stroke:#FFE470
+    style nest1_0 fill:#E3F2FD,stroke:#64B5F6
+    style nest1_1 fill:#FFFAE0,stroke:#FFE470
+    style nest1_2 fill:#FFFAE0,stroke:#FFE470
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#7E57C2,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_257.txt b/test/mermaid/hard/mermaid_257.txt
new file mode 100644
index 0000000000000000000000000000000000000000..14a418fef858d5d7747227da2e1f60445f3c4b59
--- /dev/null
+++ b/test/mermaid/hard/mermaid_257.txt
@@ -0,0 +1,32 @@
+<Acupuncture Consultation, connectedTo, Hydrotherapy>
+<Acupuncture Consultation, connectedTo, Journaling for Wellness>
+<Breathwork Exercises, connectedTo, Meditation Coaching>
+<Community Wellness Programs, connectedTo, Acupuncture Consultation>
+<Community Wellness Programs, connectedTo, Breathwork Exercises>
+<Community Wellness Programs, connectedTo, Journaling for Wellness>
+<Community Wellness Programs, connectedTo, Meditation Coaching>
+<Emotional Well_being, integrates, Employee Wellness Programs>
+<Emotional Well_being, partOf, Detox Programs>
+<Employee Wellness Programs, connectedTo, Journaling for Wellness>
+<Employee Wellness Programs, partOf, Detox Programs>
+<Environmental Wellness, connectedTo, Personal Growth Planning>
+<Environmental Wellness, partOf, Physical Activity Planning>
+<Hydrotherapy, connectedTo, Environmental Wellness>
+<Hydrotherapy, partOf, Physical Activity Planning>
+<Massage Therapy, connectedTo, Emotional Well_being>
+<Massage Therapy, partOf, Detox Programs>
+<Meditation Coaching, eats, Acupuncture Consultation>
+<Personal Growth Planning, connectedTo, Meditation Coaching>
+<Personal Growth Planning, partOf, Physical Activity Planning>
+<Self_Care Routine Development, connectedTo, Community Wellness Programs>
+<Self_Care Routine Development, connectedTo, Massage Therapy>
+<Self_Care Routine Development, connectedTo, Wellness Retreat Planning>
+<Wellness Retreat Planning, connectedTo, Community Wellness Programs>
+<Wellness Retreat Planning, connectedTo, Meditation Coaching>
+<start, connectedTo, Breathwork Exercises>
+<start, connectedTo, Community Wellness Programs>
+<start, connectedTo, Journaling for Wellness>
+<start, connectedTo, Meditation Coaching>
+<start, connectedTo, Self_Care Routine Development>
+<start, connectedTo, Wellness Retreat Planning>
+<start, reduces, Community Wellness Programs>
diff --git a/test/mermaid/hard/mermaid_259.mmd b/test/mermaid/hard/mermaid_259.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..069c0b3379912da273cb49ecbd2a15b5420f7b93
--- /dev/null
+++ b/test/mermaid/hard/mermaid_259.mmd
@@ -0,0 +1,118 @@
+graph TD
+    N0([start])
+    N1[(Bathroom Design)]
+    N2[Mood Board Creation]
+    N3[Living Room Design]
+    N4[/Lighting Design/]
+    N5[Color Scheme Selection]
+    N6(Smart Home Technology Integration)
+    N7(Contractor Coordination)
+    N8{Construction Documentation}
+    N9{Client Consultation}
+    N10(Project Management)
+    N11(Building Code Compliance)
+    N12{Concept Development}
+    N13{Installation Supervision}
+    N14(Flooring Specification)
+    N15([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Acoustic Treatment
+        nest0_0[/Material and Finish Specification/]
+        nest0_1[3D Rendering]
+        nest0_2[/Ventilation Planning/]
+        nest0_3([Hospitality Interior Design])
+    end
+    subgraph Textile and Fabric Selection
+        nest1_0[Bedroom Design]
+        nest1_1(Feng Shui Consultation)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 --> N15
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N5 --> nest0_0
+    nest0_3 --> N1
+    nest1_0 -.-> |yes| nest1_1
+    N2 --> nest1_0
+    nest1_1 --> N14
+    N4 -.-> S0
+    S0 -.-> |yes| N12
+    S0 -.-> N15
+    S0 --> N13
+    N12 -.-> S1
+    S1 --> N14
+    S1 -.-> N15
+    N1 -.-> M0
+    N4 -.-> M0
+    M0 --> N10
+    N4 --> M1
+    N2 -.-> M1
+    N1 --> M1
+    M1 --> N7
+    N1 -.-> M2
+    N2 --> |no| M2
+    M2 --> N4
+    style S0 fill:#FFFDE7,stroke:#FBC02D
+    style S1 fill:#FFE88D,stroke:#FFDA4E
+    style M0 fill:#C9F0F0,stroke:#4DD0E1
+    style M1 fill:#FFE88D,stroke:#FFDA4E
+    style M2 fill:#FFFDE7,stroke:#FBC02D
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FFDA4E,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_259.txt b/test/mermaid/hard/mermaid_259.txt
new file mode 100644
index 0000000000000000000000000000000000000000..33db8c6d3475906c004a719ad2b502c2eb3cc29d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_259.txt
@@ -0,0 +1,41 @@
+<3D Rendering, connectedTo, Ventilation Planning>
+<3D Rendering, partOf, Acoustic Treatment>
+<Bathroom Design, connectedTo, Contractor Coordination>
+<Bathroom Design, connectedTo, Lighting Design>
+<Bathroom Design, connectedTo, Mood Board Creation>
+<Bathroom Design, connectedTo, Project Management>
+<Bedroom Design, partOf, Textile and Fabric Selection>
+<Bedroom Design, yes, Feng Shui Consultation>
+<Building Code Compliance, connectedTo, Concept Development>
+<Client Consultation, connectedTo, Project Management>
+<Color Scheme Selection, connectedTo, Material and Finish Specification>
+<Color Scheme Selection, connectedTo, Smart Home Technology Integration>
+<Concept Development, connectedTo, Flooring Specification>
+<Concept Development, connectedTo, Installation Supervision>
+<Concept Development, connectedTo, end>
+<Construction Documentation, connectedTo, Client Consultation>
+<Contractor Coordination, connectedTo, Construction Documentation>
+<Feng Shui Consultation, connectedTo, Flooring Specification>
+<Feng Shui Consultation, partOf, Textile and Fabric Selection>
+<Flooring Specification, connectedTo, end>
+<Hospitality Interior Design, connectedTo, Bathroom Design>
+<Hospitality Interior Design, partOf, Acoustic Treatment>
+<Installation Supervision, connectedTo, Flooring Specification>
+<Lighting Design, connectedTo, Color Scheme Selection>
+<Lighting Design, connectedTo, Contractor Coordination>
+<Lighting Design, connectedTo, Installation Supervision>
+<Lighting Design, connectedTo, Project Management>
+<Lighting Design, connectedTo, end>
+<Lighting Design, yes, Concept Development>
+<Living Room Design, connectedTo, Lighting Design>
+<Material and Finish Specification, connectedTo, 3D Rendering>
+<Material and Finish Specification, partOf, Acoustic Treatment>
+<Mood Board Creation, connectedTo, Bedroom Design>
+<Mood Board Creation, connectedTo, Contractor Coordination>
+<Mood Board Creation, connectedTo, Living Room Design>
+<Mood Board Creation, no, Lighting Design>
+<Project Management, connectedTo, Building Code Compliance>
+<Smart Home Technology Integration, connectedTo, Contractor Coordination>
+<Ventilation Planning, connectedTo, Hospitality Interior Design>
+<Ventilation Planning, partOf, Acoustic Treatment>
+<start, connectedTo, Bathroom Design>
diff --git a/test/mermaid/hard/mermaid_26.mmd b/test/mermaid/hard/mermaid_26.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..c915cb5dbd9dc1595f9e60f20a23756580a4a9e4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_26.mmd
@@ -0,0 +1,110 @@
+graph LR
+    N0([start])
+    N1(Cold Chain Management)
+    N2{Hazardous Material Transport}
+    N3[[Supply Chain Visibility]]
+    N4([Inventory Sync])
+    N5[(Pickup Request)]
+    N6[Cross_docking]
+    N7(Pallet Stacking)
+    N8[[Fleet Maintenance Scheduling]]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Yard Management
+        nest0_0[(Rail Transport Coordination)]
+        nest0_1[[Hub Transfer]]
+        nest0_2[[Proof of Delivery]]
+        nest0_3[[Carrier Selection]]
+    end
+    subgraph Driver Check_in
+        nest1_0([Invoice Matching])
+        nest1_1(Last_mile Dispatch)
+        nest1_2[(Freight Booking)]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N5 --> nest0_0
+    nest0_3 -.-> N1
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N1 --> nest1_0
+    nest1_2 --> N8
+    N0 -.-> S0
+    S0 -.-> N5
+    S0 -.-> N4
+    S0 --> N7
+    N1 --> S1
+    S1 --> N8
+    S1 --> N5
+    N4 -.-> S2
+    S2 -.-> N7
+    S2 -.-> N6
+    S2 --> N8
+    N0 -.-> M0
+    N1 -.-> M0
+    M0 --> N3
+    N1 --> M1
+    N5 -.-> M1
+    M1 -.-> N8
+    N0 --> M2
+    N2 -.-> M2
+    N1 -.-> M2
+    M2 --> N5
+    style S0 fill:#F6F6F6,stroke:#CFCFCF
+    style S1 fill:#BBDEFB,stroke:#2196F3
+    style S2 fill:#BBDEFB,stroke:#2196F3
+    style M0 fill:#BBDEFB,stroke:#2196F3
+    style M1 fill:#EFEBE9,stroke:#A1887F
+    style M2 fill:#EFEBE9,stroke:#A1887F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_26.txt b/test/mermaid/hard/mermaid_26.txt
new file mode 100644
index 0000000000000000000000000000000000000000..05876183619f73ecdb6943838a47a31d6252de78
--- /dev/null
+++ b/test/mermaid/hard/mermaid_26.txt
@@ -0,0 +1,36 @@
+<Carrier Selection, connectedTo, Cold Chain Management>
+<Carrier Selection, partOf, Yard Management>
+<Cold Chain Management, connectedTo, Fleet Maintenance Scheduling>
+<Cold Chain Management, connectedTo, Hazardous Material Transport>
+<Cold Chain Management, connectedTo, Invoice Matching>
+<Cold Chain Management, connectedTo, Pickup Request>
+<Cold Chain Management, connectedTo, Supply Chain Visibility>
+<Cross_docking, connectedTo, Pallet Stacking>
+<Freight Booking, connectedTo, Fleet Maintenance Scheduling>
+<Freight Booking, partOf, Driver Check_in>
+<Hazardous Material Transport, connectedTo, Pickup Request>
+<Hazardous Material Transport, connectedTo, Supply Chain Visibility>
+<Hub Transfer, connectedTo, Proof of Delivery>
+<Hub Transfer, partOf, Yard Management>
+<Inventory Sync, connectedTo, Cross_docking>
+<Inventory Sync, connectedTo, Fleet Maintenance Scheduling>
+<Inventory Sync, connectedTo, Pallet Stacking>
+<Inventory Sync, connectedTo, Pickup Request>
+<Invoice Matching, connectedTo, Last_mile Dispatch>
+<Invoice Matching, partOf, Driver Check_in>
+<Last_mile Dispatch, connectedTo, Freight Booking>
+<Last_mile Dispatch, partOf, Driver Check_in>
+<Pallet Stacking, connectedTo, Fleet Maintenance Scheduling>
+<Pickup Request, connectedTo, Cross_docking>
+<Pickup Request, connectedTo, Fleet Maintenance Scheduling>
+<Pickup Request, connectedTo, Rail Transport Coordination>
+<Proof of Delivery, connectedTo, Carrier Selection>
+<Proof of Delivery, partOf, Yard Management>
+<Rail Transport Coordination, connectedTo, Hub Transfer>
+<Rail Transport Coordination, partOf, Yard Management>
+<Supply Chain Visibility, connectedTo, Inventory Sync>
+<start, connectedTo, Cold Chain Management>
+<start, connectedTo, Inventory Sync>
+<start, connectedTo, Pallet Stacking>
+<start, connectedTo, Pickup Request>
+<start, connectedTo, Supply Chain Visibility>
diff --git a/test/mermaid/hard/mermaid_260.mmd b/test/mermaid/hard/mermaid_260.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..924a9a250bfb235f661160265e6871b0e859942d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_260.mmd
@@ -0,0 +1,102 @@
+graph LR
+    N0([Universal Design Principles])
+    N1([Budget Management])
+    N2[(Kitchen Design)]
+    N3[[Client Consultation]]
+    N4([3D Rendering])
+    N5[/Furniture Selection/]
+    N6[/Hospitality Interior Design/]
+    N7(Art and Accessory Curation)
+    N8[(Bedroom Design)]
+    N9[Material and Finish Specification]
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Retail Interior Design
+        nest0_0[/Contractor Coordination/]
+        nest0_1[Color Scheme Selection]
+    end
+    subgraph Ventilation Planning
+        nest1_0[Concept Development]
+        nest1_1[Lighting Design]
+        nest1_2[(Bathroom Design)]
+        nest1_3[(Mood Board Creation)]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    nest0_0 --> nest0_1
+    N2 --> nest0_0
+    nest0_1 -.-> N3
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N4 --> nest1_0
+    nest1_3 -.-> |colors| N2
+    N5 -.-> S1
+    S1 -.-> N9
+    S1 --> N8
+    S1 --> N7
+    N3 --> M0
+    N4 --> M0
+    M0 --> N8
+    N5 --> M1
+    N6 --> M1
+    N4 --> M1
+    N3 --> M1
+    M1 --> N8
+    style N0 fill:#F3E5F5,stroke:#BA68C8
+    style N1 fill:#C8EDFF,stroke:#82DAFF
+    style N2 fill:#C8EDFF,stroke:#82DAFF
+    style N3 fill:#F3E5F5,stroke:#BA68C8
+    style N4 fill:#CADEDE,stroke:#94C0C0
+    style N5 fill:#F3E5F5,stroke:#BA68C8
+    style N6 fill:#F3E5F5,stroke:#BA68C8
+    style N7 fill:#F3E5F5,stroke:#BA68C8
+    style N8 fill:#CADEDE,stroke:#94C0C0
+    style N9 fill:#CADEDE,stroke:#94C0C0
+    style S1 fill:#C8EDFF,stroke:#82DAFF
+    style M0 fill:#CADEDE,stroke:#94C0C0
+    style M1 fill:#F3E5F5,stroke:#BA68C8
+    style nest0_0 fill:#F3E5F5,stroke:#BA68C8
+    style nest0_1 fill:#F3E5F5,stroke:#BA68C8
+    style nest1_0 fill:#F3E5F5,stroke:#BA68C8
+    style nest1_1 fill:#C8EDFF,stroke:#82DAFF
+    style nest1_2 fill:#CADEDE,stroke:#94C0C0
+    style nest1_3 fill:#F3E5F5,stroke:#BA68C8
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#94C0C0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_260.txt b/test/mermaid/hard/mermaid_260.txt
new file mode 100644
index 0000000000000000000000000000000000000000..bc4c0eee875d135fa141e24c39691ed712289a44
--- /dev/null
+++ b/test/mermaid/hard/mermaid_260.txt
@@ -0,0 +1,29 @@
+<3D Rendering, connectedTo, Bedroom Design>
+<3D Rendering, connectedTo, Concept Development>
+<3D Rendering, connectedTo, Furniture Selection>
+<Art and Accessory Curation, connectedTo, Bedroom Design>
+<Bathroom Design, connectedTo, Mood Board Creation>
+<Bathroom Design, partOf, Ventilation Planning>
+<Bedroom Design, connectedTo, Material and Finish Specification>
+<Budget Management, connectedTo, Kitchen Design>
+<Client Consultation, connectedTo, 3D Rendering>
+<Client Consultation, connectedTo, Bedroom Design>
+<Color Scheme Selection, connectedTo, Client Consultation>
+<Color Scheme Selection, partOf, Retail Interior Design>
+<Concept Development, connectedTo, Lighting Design>
+<Concept Development, partOf, Ventilation Planning>
+<Contractor Coordination, connectedTo, Color Scheme Selection>
+<Contractor Coordination, partOf, Retail Interior Design>
+<Furniture Selection, connectedTo, Art and Accessory Curation>
+<Furniture Selection, connectedTo, Bedroom Design>
+<Furniture Selection, connectedTo, Hospitality Interior Design>
+<Furniture Selection, connectedTo, Material and Finish Specification>
+<Hospitality Interior Design, connectedTo, Art and Accessory Curation>
+<Hospitality Interior Design, connectedTo, Bedroom Design>
+<Kitchen Design, connectedTo, Client Consultation>
+<Kitchen Design, connectedTo, Contractor Coordination>
+<Lighting Design, connectedTo, Bathroom Design>
+<Lighting Design, partOf, Ventilation Planning>
+<Mood Board Creation, colors, Kitchen Design>
+<Mood Board Creation, partOf, Ventilation Planning>
+<Universal Design Principles, connectedTo, Budget Management>
diff --git a/test/mermaid/hard/mermaid_261.mmd b/test/mermaid/hard/mermaid_261.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..0f89ed387de22e42205a55e3ab00a3726a45ee7d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_261.mmd
@@ -0,0 +1,117 @@
+graph RL
+    N0([start])
+    N1[/Site Measurement/]
+    N2[Bathroom Design]
+    N3([Sustainable Design Practices])
+    N4[[Flooring Specification]]
+    N5(Custom Furniture Design)
+    N6[/Universal Design Principles/]
+    N7(Mood Board Creation)
+    N8([Material and Finish Specification])
+    N9[(Budget Management)]
+    N10[3D Rendering]
+    N11[/Feng Shui Consultation/]
+    N12[(Concept Development)]
+    N13[Hospitality Interior Design]
+    N14[Post_Occupancy Evaluation]
+    N15([Construction Documentation])
+    N16([end])
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Kitchen Design
+        nest0_0{Client Consultation}
+        nest0_1[Acoustic Treatment]
+        nest0_2([Office Space Design])
+        nest0_3[Ergonomics Integration]
+    end
+    subgraph Living Room Design
+        nest1_0[(CAD Drafting)]
+        nest1_1[[Bedroom Design]]
+    end
+    N0 --> |no| N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> |no| N10
+    N10 --> N11
+    N11 --> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 -.-> N16
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N3 --> nest0_0
+    nest0_3 --> N4
+    nest1_0 --> nest1_1
+    N14 --> nest1_0
+    nest1_1 --> N14
+    N3 -.-> S1
+    S1 -.-> N11
+    S1 -.-> N10
+    N8 -.-> S2
+    S2 --> N12
+    S2 -.-> N15
+    S2 --> |yes| N14
+    S2 --> N16
+    N0 -.-> |yes| M1
+    N5 -.-> M1
+    M1 --> N9
+    N6 --> M2
+    N7 -.-> M2
+    N8 -.-> M2
+    N0 --> M2
+    M2 -.-> N10
+    style S1 fill:#B3E5FC,stroke:#03A9F4
+    style S2 fill:#B3E5FC,stroke:#03A9F4
+    style M1 fill:#BBDEFB,stroke:#2196F3
+    style M2 fill:#BBDEFB,stroke:#2196F3
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#CDDC39,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_262.txt b/test/mermaid/hard/mermaid_262.txt
new file mode 100644
index 0000000000000000000000000000000000000000..daec371b26df3cdb1b0190c9ec83318e867f217f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_262.txt
@@ -0,0 +1,42 @@
+<Accent Adaptation, connectedTo, Cross_Lingual Communication>
+<Accent Adaptation, connectedTo, Customer Support Translation>
+<Consecutive Interpretation, connectedTo, Machine Translation Engine>
+<Consecutive Interpretation, partOf, Glossary Management>
+<Contextual Understanding, connectedTo, Pronunciation Correction>
+<Cross_Lingual Communication, connectedTo, Social Media Translation>
+<Cross_Lingual Communication, connectedTo, Technical Manual Translation>
+<Customer Support Translation, connectedTo, Pronunciation Correction>
+<Customer Support Translation, secures, Contextual Understanding>
+<Data Security for Translated Content, connectedTo, Rule_Based Machine Translation>
+<Domain_Specific Translation Models, integrates, Simultaneous Interpretation>
+<Domain_Specific Translation Models, partOf, Dialect Recognition>
+<Emotion Detection in Speech, connectedTo, Consecutive Interpretation>
+<Emotion Detection in Speech, partOf, Glossary Management>
+<Machine Translation Engine, connectedTo, Noise Reduction for Speech Input>
+<Machine Translation Engine, connectedTo, Voice Biometrics>
+<Neural Machine Translation, connectedTo, Emotion Detection in Speech>
+<Neural Machine Translation, partOf, Glossary Management>
+<Noise Reduction for Speech Input, connectedTo, Domain_Specific Translation Models>
+<Noise Reduction for Speech Input, partOf, Dialect Recognition>
+<Offline Translation Capabilities, connectedTo, Pronunciation Correction>
+<Offline Translation Capabilities, connectedTo, Text_to_Speech Synthesis>
+<Pronunciation Correction, processes, Speaker Diarization>
+<Rule_Based Machine Translation, connectedTo, Statistical Machine Translation>
+<Simultaneous Interpretation, connectedTo, Text_to_Speech Synthesis>
+<Simultaneous Interpretation, partOf, Dialect Recognition>
+<Social Media Translation, connectedTo, Neural Machine Translation>
+<Social Media Translation, partOf, Glossary Management>
+<Speaker Diarization, connectedTo, Data Security for Translated Content>
+<Statistical Machine Translation, connectedTo, Real_Time Document Translation>
+<Technical Manual Translation, connectedTo, Customer Support Translation>
+<Technical Manual Translation, develops, Offline Translation Capabilities>
+<Text_to_Speech Synthesis, connectedTo, Machine Translation Engine>
+<Voice Biometrics, connectedTo, Data Security for Translated Content>
+<Voice Biometrics, connectedTo, Pronunciation Correction>
+<Voice Biometrics, connectedTo, Wearable Translation Devices>
+<Wearable Translation Devices, connectedTo, Customer Support Translation>
+<Wearable Translation Devices, connectedTo, Pronunciation Correction>
+<Wearable Translation Devices, connectedTo, Real_Time Document Translation>
+<Wearable Translation Devices, connectedTo, Statistical Machine Translation>
+<start, connectedTo, Accent Adaptation>
+<start, connectedTo, Customer Support Translation>
diff --git a/test/mermaid/hard/mermaid_263.txt b/test/mermaid/hard/mermaid_263.txt
new file mode 100644
index 0000000000000000000000000000000000000000..afaec5bf970ccaae61124e439dd178ee36153a32
--- /dev/null
+++ b/test/mermaid/hard/mermaid_263.txt
@@ -0,0 +1,33 @@
+<Accent Adaptation, connectedTo, Legal Document Translation>
+<Accent Adaptation, connectedTo, Noise Reduction for Speech Input>
+<Accent Adaptation, connectedTo, Offline Translation Capabilities>
+<Cross_Lingual Communication, connectedTo, Legal Document Translation>
+<Cross_Lingual Communication, connectedTo, Offline Translation Capabilities>
+<Cross_Lingual Communication, connectedTo, Voice Biometrics>
+<Language Detection, connectedTo, Speech Recognition>
+<Language Detection, partOf, Consecutive Interpretation>
+<Legal Document Translation, connectedTo, Language Detection>
+<Legal Document Translation, connectedTo, Offline Translation Capabilities>
+<Machine Translation Engine, connectedTo, Multimodal Translation>
+<Machine Translation Engine, partOf, Rule_Based Machine Translation>
+<Multimodal Translation, connectedTo, Offline Translation Capabilities>
+<Multimodal Translation, partOf, Rule_Based Machine Translation>
+<Noise Reduction for Speech Input, connectedTo, Legal Document Translation>
+<Noise Reduction for Speech Input, connectedTo, Sentiment Analysis in Translation>
+<Real_Time Document Translation, connectedTo, Text_to_Speech Synthesis>
+<Real_Time Document Translation, partOf, Consecutive Interpretation>
+<Sentiment Analysis in Translation, yes, Cross_Lingual Communication>
+<Social Media Translation, connectedTo, Machine Translation Engine>
+<Social Media Translation, partOf, Rule_Based Machine Translation>
+<Speech Recognition, connectedTo, Real_Time Document Translation>
+<Speech Recognition, partOf, Consecutive Interpretation>
+<Text_to_Speech Synthesis, no, Accent Adaptation>
+<Text_to_Speech Synthesis, partOf, Consecutive Interpretation>
+<Tone Recognition, connectedTo, Legal Document Translation>
+<Voice Biometrics, connectedTo, Legal Document Translation>
+<Voice Biometrics, connectedTo, Offline Translation Capabilities>
+<Voice Biometrics, connectedTo, Social Media Translation>
+<Voice Biometrics, connectedTo, Tone Recognition>
+<start, connectedTo, Accent Adaptation>
+<start, connectedTo, Noise Reduction for Speech Input>
+<start, connectedTo, Sentiment Analysis in Translation>
diff --git a/test/mermaid/hard/mermaid_264.mmd b/test/mermaid/hard/mermaid_264.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..8575d8bcd3ab843365b4dccdf00f141b7b37589e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_264.mmd
@@ -0,0 +1,136 @@
+graph BT
+    N0([start])
+    N1(Voice Biometrics)
+    N2(Offline Translation Capabilities)
+    N3[[Noise Reduction for Speech Input]]
+    N4(Statistical Machine Translation)
+    N5[Text_to_Speech Synthesis]
+    N6[/Social Media Translation/]
+    N7(Real_Time Captioning)
+    N8([Medical Translation])
+    N9[/Speech Recognition/]
+    N10(Real_Time Document Translation)
+    N11[/Machine Translation Engine/]
+    N12[Sentiment Analysis in Translation]
+    N13[Wearable Translation Devices]
+    N14(Speaker Diarization)
+    N15[Technical Manual Translation]
+    N16[[Neural Machine Translation]]
+    N17{Low_Latency Processing}
+    N18([Tone Recognition])
+    N19([Glossary Management])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    subgraph Cross_Lingual Communication
+        nest0_0[[Dialect Recognition]]
+        nest0_1[/Accent Adaptation/]
+    end
+    subgraph Live Event Translation
+        nest1_0[Meeting Translation Systems]
+        nest1_1[[Data Security for Translated Content]]
+        nest1_2(Simultaneous Interpretation)
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> |streams| N10
+    N10 --> N11
+    N11 --> N12
+    N12 --> N13
+    N13 --> N14
+    N14 -.-> N15
+    N15 -.-> N16
+    N16 --> N17
+    N17 --> N18
+    N18 --> N19
+    nest0_0 -.-> |transcribes| nest0_1
+    N2 -.-> nest0_0
+    nest0_1 -.-> N2
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N12 -.-> nest1_0
+    nest1_2 --> N7
+    N1 --> S0
+    S0 -.-> N7
+    S0 -.-> N13
+    S0 -.-> N15
+    N1 -.-> S1
+    S1 -.-> N14
+    S1 --> N3
+    S1 -.-> N8
+    N0 --> M0
+    N1 --> M0
+    M0 --> N4
+    style N0 fill:#E6EE9C,stroke:#CDDC39
+    style N1 fill:#E8F5E9,stroke:#66BB6A
+    style N2 fill:#E6EE9C,stroke:#CDDC39
+    style N3 fill:#E8F5E9,stroke:#66BB6A
+    style N4 fill:#E6EE9C,stroke:#CDDC39
+    style N5 fill:#D1C4E9,stroke:#7E57C2
+    style N6 fill:#E8F5E9,stroke:#66BB6A
+    style N7 fill:#E6EE9C,stroke:#CDDC39
+    style N8 fill:#D1C4E9,stroke:#7E57C2
+    style N9 fill:#D1C4E9,stroke:#7E57C2
+    style N10 fill:#E8F5E9,stroke:#66BB6A
+    style N11 fill:#E6EE9C,stroke:#CDDC39
+    style N12 fill:#E8F5E9,stroke:#66BB6A
+    style N13 fill:#D1C4E9,stroke:#7E57C2
+    style N14 fill:#D1C4E9,stroke:#7E57C2
+    style N15 fill:#E8F5E9,stroke:#66BB6A
+    style N16 fill:#D1C4E9,stroke:#7E57C2
+    style N17 fill:#D1C4E9,stroke:#7E57C2
+    style N18 fill:#E6EE9C,stroke:#CDDC39
+    style N19 fill:#E6EE9C,stroke:#CDDC39
+    style S0 fill:#E6EE9C,stroke:#CDDC39
+    style S1 fill:#D1C4E9,stroke:#7E57C2
+    style M0 fill:#E8F5E9,stroke:#66BB6A
+    style nest0_0 fill:#E6EE9C,stroke:#CDDC39
+    style nest0_1 fill:#E8F5E9,stroke:#66BB6A
+    style nest1_0 fill:#D1C4E9,stroke:#7E57C2
+    style nest1_1 fill:#E8F5E9,stroke:#66BB6A
+    style nest1_2 fill:#E8F5E9,stroke:#66BB6A
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#7E57C2,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_265.mmd b/test/mermaid/hard/mermaid_265.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..2955bf232e2df9ba1f0c019d7d9b7e4336f1273f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_265.mmd
@@ -0,0 +1,92 @@
+graph LR
+    N0([start])
+    N1([AI for Drone Autonomy])
+    N2[(Wildlife Tracking)]
+    N3[/Data Processing from Drones/]
+    N4([Aerial Photography])
+    N5[/Delivery Services/]
+    N6([Security Surveillance])
+    N7[/Collision Avoidance Systems/]
+    N8[(Mapping and Surveying)]
+    N9(Swarm Robotics for Drones)
+    N10[/Navigation System/]
+    N11[[Remote Piloting Training]]
+    N12[Precision Agriculture]
+    N13[Battery Management System]
+    N14(Airspace Management for Drones)
+    N15([end])
+    S0(( ))
+    M1(( ))
+    subgraph Payload Customization
+        nest0_0([Drone Delivery Logistics])
+        nest0_1[[Inspection]]
+    end
+    subgraph Drone Data Security
+        nest1_0[[Drone Design]]
+        nest1_1[/Payload Integration/]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    nest0_0 --> |no| nest0_1
+    N14 -.-> nest0_0
+    nest0_1 -.-> N5
+    nest1_0 --> nest1_1
+    N11 --> nest1_0
+    nest1_1 -.-> N12
+    N2 -.-> S0
+    S0 -.-> N12
+    S0 -.-> N15
+    N9 --> M1
+    N11 --> M1
+    N13 --> M1
+    M1 --> N15
+    nest1_1 --> N15
+    N7 --> nest0_1
+    N11 -.-> N2
+    style S0 fill:#FFFAE0,stroke:#FFE470
+    style M1 fill:#FFEBEB,stroke:#FFC2C2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFC2C2,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_265.txt b/test/mermaid/hard/mermaid_265.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6a0763b5dc9fe13d380e478708928b70ff831869
--- /dev/null
+++ b/test/mermaid/hard/mermaid_265.txt
@@ -0,0 +1,33 @@
+<AI for Drone Autonomy, connectedTo, Wildlife Tracking>
+<Aerial Photography, connectedTo, Delivery Services>
+<Airspace Management for Drones, connectedTo, Drone Delivery Logistics>
+<Airspace Management for Drones, connectedTo, end>
+<Battery Management System, connectedTo, Airspace Management for Drones>
+<Battery Management System, connectedTo, end>
+<Collision Avoidance Systems, connectedTo, Inspection>
+<Collision Avoidance Systems, connectedTo, Mapping and Surveying>
+<Data Processing from Drones, connectedTo, Aerial Photography>
+<Delivery Services, connectedTo, Security Surveillance>
+<Drone Delivery Logistics, no, Inspection>
+<Drone Delivery Logistics, partOf, Payload Customization>
+<Drone Design, connectedTo, Payload Integration>
+<Drone Design, partOf, Drone Data Security>
+<Inspection, connectedTo, Delivery Services>
+<Inspection, partOf, Payload Customization>
+<Mapping and Surveying, connectedTo, Swarm Robotics for Drones>
+<Navigation System, connectedTo, Remote Piloting Training>
+<Payload Integration, connectedTo, Precision Agriculture>
+<Payload Integration, connectedTo, end>
+<Payload Integration, partOf, Drone Data Security>
+<Precision Agriculture, connectedTo, Battery Management System>
+<Remote Piloting Training, connectedTo, Drone Design>
+<Remote Piloting Training, connectedTo, Precision Agriculture>
+<Remote Piloting Training, connectedTo, Wildlife Tracking>
+<Remote Piloting Training, connectedTo, end>
+<Security Surveillance, connectedTo, Collision Avoidance Systems>
+<Swarm Robotics for Drones, connectedTo, Navigation System>
+<Swarm Robotics for Drones, connectedTo, end>
+<Wildlife Tracking, connectedTo, Data Processing from Drones>
+<Wildlife Tracking, connectedTo, Precision Agriculture>
+<Wildlife Tracking, connectedTo, end>
+<start, connectedTo, AI for Drone Autonomy>
diff --git a/test/mermaid/hard/mermaid_266.mmd b/test/mermaid/hard/mermaid_266.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..a896ca355f3aa5c1c4a0b659d9b0a08584d47be1
--- /dev/null
+++ b/test/mermaid/hard/mermaid_266.mmd
@@ -0,0 +1,128 @@
+graph BT
+    N0([start])
+    N1[Airspace Management for Drones]
+    N2[Drone Delivery Logistics]
+    N3[/Battery Management System/]
+    N4[Videography]
+    N5[Delivery Services]
+    N6(Drone Maintenance)
+    N7[Endurance Optimization]
+    N8[(Inspection)]
+    N9(Payload Customization)
+    N10([Drone Regulations Compliance])
+    N11{Wildlife Tracking}
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Ethical Drone Use
+        nest0_0[Sensor Integration]
+        nest0_1(Remote Piloting Training)
+        nest0_2[/Flight Control System/]
+    end
+    subgraph Propulsion System Development
+        nest1_0([Security Surveillance])
+        nest1_1[[Aerial Photography]]
+        nest1_2([Environmental Monitoring])
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N5 -.-> nest0_0
+    nest0_2 --> |visualizes| N9
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N1 --> nest1_0
+    nest1_2 -.-> N3
+    N7 --> S0
+    S0 -.-> N10
+    S0 -.-> N11
+    S0 -.-> |captures| N9
+    N2 -.-> S1
+    S1 --> N9
+    S1 -.-> N7
+    N4 --> M0
+    N5 --> M0
+    M0 --> N7
+    N1 --> M1
+    N2 --> |flies| M1
+    N3 -.-> M1
+    M1 -.-> N10
+    N9 --> |surveys| M2
+    N1 --> |optimizes| M2
+    N8 -.-> M2
+    N6 -.-> M2
+    M2 --> N11
+    style N0 fill:#D0EFEE,stroke:#73C6BC
+    style N1 fill:#FFCDD2,stroke:#F44336
+    style N2 fill:#FCE4EC,stroke:#F06292
+    style N3 fill:#FFCDD2,stroke:#F44336
+    style N4 fill:#FCE4EC,stroke:#F06292
+    style N5 fill:#FCE4EC,stroke:#F06292
+    style N6 fill:#FCE4EC,stroke:#F06292
+    style N7 fill:#FCE4EC,stroke:#F06292
+    style N8 fill:#D0EFEE,stroke:#73C6BC
+    style N9 fill:#FFCDD2,stroke:#F44336
+    style N10 fill:#D0EFEE,stroke:#73C6BC
+    style N11 fill:#FFCDD2,stroke:#F44336
+    style S0 fill:#FFCDD2,stroke:#F44336
+    style S1 fill:#FCE4EC,stroke:#F06292
+    style M0 fill:#D0EFEE,stroke:#73C6BC
+    style M1 fill:#FCE4EC,stroke:#F06292
+    style M2 fill:#D0EFEE,stroke:#73C6BC
+    style nest0_0 fill:#D0EFEE,stroke:#73C6BC
+    style nest0_1 fill:#D0EFEE,stroke:#73C6BC
+    style nest0_2 fill:#D0EFEE,stroke:#73C6BC
+    style nest1_0 fill:#FCE4EC,stroke:#F06292
+    style nest1_1 fill:#FCE4EC,stroke:#F06292
+    style nest1_2 fill:#FCE4EC,stroke:#F06292
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#F44336,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#F44336,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#F44336,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#F44336,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#F44336,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#F44336,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#F44336,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#F44336,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#73C6BC,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_266.txt b/test/mermaid/hard/mermaid_266.txt
new file mode 100644
index 0000000000000000000000000000000000000000..f3c37aec17ae5ca5416e12275e8c1dbc1075ddbd
--- /dev/null
+++ b/test/mermaid/hard/mermaid_266.txt
@@ -0,0 +1,39 @@
+<Aerial Photography, connectedTo, Environmental Monitoring>
+<Aerial Photography, partOf, Propulsion System Development>
+<Airspace Management for Drones, connectedTo, Drone Delivery Logistics>
+<Airspace Management for Drones, connectedTo, Drone Regulations Compliance>
+<Airspace Management for Drones, connectedTo, Security Surveillance>
+<Airspace Management for Drones, optimizes, Wildlife Tracking>
+<Battery Management System, connectedTo, Drone Regulations Compliance>
+<Battery Management System, connectedTo, Videography>
+<Delivery Services, connectedTo, Drone Maintenance>
+<Delivery Services, connectedTo, Endurance Optimization>
+<Delivery Services, connectedTo, Sensor Integration>
+<Drone Delivery Logistics, connectedTo, Battery Management System>
+<Drone Delivery Logistics, connectedTo, Endurance Optimization>
+<Drone Delivery Logistics, connectedTo, Payload Customization>
+<Drone Delivery Logistics, flies, Drone Regulations Compliance>
+<Drone Maintenance, connectedTo, Endurance Optimization>
+<Drone Maintenance, connectedTo, Wildlife Tracking>
+<Drone Regulations Compliance, connectedTo, Wildlife Tracking>
+<Endurance Optimization, captures, Payload Customization>
+<Endurance Optimization, connectedTo, Drone Regulations Compliance>
+<Endurance Optimization, connectedTo, Inspection>
+<Endurance Optimization, connectedTo, Wildlife Tracking>
+<Environmental Monitoring, connectedTo, Battery Management System>
+<Environmental Monitoring, partOf, Propulsion System Development>
+<Flight Control System, partOf, Ethical Drone Use>
+<Flight Control System, visualizes, Payload Customization>
+<Inspection, connectedTo, Payload Customization>
+<Inspection, connectedTo, Wildlife Tracking>
+<Payload Customization, connectedTo, Drone Regulations Compliance>
+<Payload Customization, surveys, Wildlife Tracking>
+<Remote Piloting Training, connectedTo, Flight Control System>
+<Remote Piloting Training, partOf, Ethical Drone Use>
+<Security Surveillance, connectedTo, Aerial Photography>
+<Security Surveillance, partOf, Propulsion System Development>
+<Sensor Integration, connectedTo, Remote Piloting Training>
+<Sensor Integration, partOf, Ethical Drone Use>
+<Videography, connectedTo, Delivery Services>
+<Videography, connectedTo, Endurance Optimization>
+<start, connectedTo, Airspace Management for Drones>
diff --git a/test/mermaid/hard/mermaid_267.mmd b/test/mermaid/hard/mermaid_267.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..879f7062a114acf9162c3186ad3211fa783682be
--- /dev/null
+++ b/test/mermaid/hard/mermaid_267.mmd
@@ -0,0 +1,110 @@
+graph BT
+    N0([start])
+    N1[Wildlife Tracking]
+    N2{Urban Air Mobility Planning}
+    N3[(Thermal Imaging with Drones)]
+    N4[/Environmental Monitoring/]
+    N5([Geofencing Implementation])
+    N6[Drone Regulations Compliance]
+    N7[Precision Agriculture]
+    N8{3D Modeling from Drone Data}
+    N9([Communication Systems])
+    N10[Endurance Optimization]
+    N11[Propeller Design]
+    N12[(Payload Customization)]
+    N13([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Drone Design
+        nest0_0[[Mapping and Surveying]]
+        nest0_1{Collision Avoidance Systems}
+    end
+    subgraph Payload Integration
+        nest1_0(Ethical Drone Use)
+        nest1_1{Remote Piloting Training}
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> N13
+    nest0_0 -.-> nest0_1
+    N10 -.-> nest0_0
+    nest0_1 -.-> N11
+    nest1_0 --> nest1_1
+    N2 --> nest1_0
+    nest1_1 -.-> N9
+    N0 --> S0
+    S0 -.-> N12
+    S0 --> N5
+    S0 -.-> N8
+    N5 -.-> S1
+    S1 -.-> N11
+    S1 -.-> N7
+    S1 --> N12
+    S1 -.-> N10
+    N3 -.-> M0
+    N2 -.-> M0
+    N1 -.-> M0
+    M0 -.-> N9
+    N1 -.-> M1
+    N3 --> M1
+    M1 -.-> N9
+    N0 --> M2
+    N1 -.-> M2
+    M2 -.-> N4
+    style S0 fill:#F0F4C3,stroke:#AED581
+    style S1 fill:#DED7F0,stroke:#A188DB
+    style M0 fill:#F0F4C3,stroke:#AED581
+    style M1 fill:#DED7F0,stroke:#A188DB
+    style M2 fill:#FFDCD6,stroke:#FFB2A5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#AED581,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_267.txt b/test/mermaid/hard/mermaid_267.txt
new file mode 100644
index 0000000000000000000000000000000000000000..a535f711eb7458290a962e9a64bbd342654fb991
--- /dev/null
+++ b/test/mermaid/hard/mermaid_267.txt
@@ -0,0 +1,35 @@
+<3D Modeling from Drone Data, connectedTo, Communication Systems>
+<Collision Avoidance Systems, connectedTo, Propeller Design>
+<Collision Avoidance Systems, partOf, Drone Design>
+<Communication Systems, connectedTo, Endurance Optimization>
+<Drone Regulations Compliance, connectedTo, Precision Agriculture>
+<Endurance Optimization, connectedTo, Mapping and Surveying>
+<Endurance Optimization, connectedTo, Propeller Design>
+<Environmental Monitoring, connectedTo, Geofencing Implementation>
+<Ethical Drone Use, connectedTo, Remote Piloting Training>
+<Ethical Drone Use, partOf, Payload Integration>
+<Geofencing Implementation, connectedTo, Drone Regulations Compliance>
+<Geofencing Implementation, connectedTo, Endurance Optimization>
+<Geofencing Implementation, connectedTo, Payload Customization>
+<Geofencing Implementation, connectedTo, Precision Agriculture>
+<Geofencing Implementation, connectedTo, Propeller Design>
+<Mapping and Surveying, connectedTo, Collision Avoidance Systems>
+<Mapping and Surveying, partOf, Drone Design>
+<Payload Customization, connectedTo, end>
+<Precision Agriculture, connectedTo, 3D Modeling from Drone Data>
+<Propeller Design, connectedTo, Payload Customization>
+<Remote Piloting Training, connectedTo, Communication Systems>
+<Remote Piloting Training, partOf, Payload Integration>
+<Thermal Imaging with Drones, connectedTo, Communication Systems>
+<Thermal Imaging with Drones, connectedTo, Environmental Monitoring>
+<Urban Air Mobility Planning, connectedTo, Communication Systems>
+<Urban Air Mobility Planning, connectedTo, Ethical Drone Use>
+<Urban Air Mobility Planning, connectedTo, Thermal Imaging with Drones>
+<Wildlife Tracking, connectedTo, Communication Systems>
+<Wildlife Tracking, connectedTo, Environmental Monitoring>
+<Wildlife Tracking, connectedTo, Urban Air Mobility Planning>
+<start, connectedTo, 3D Modeling from Drone Data>
+<start, connectedTo, Environmental Monitoring>
+<start, connectedTo, Geofencing Implementation>
+<start, connectedTo, Payload Customization>
+<start, connectedTo, Wildlife Tracking>
diff --git a/test/mermaid/hard/mermaid_268.mmd b/test/mermaid/hard/mermaid_268.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..d78a4a61676c28d38de0a0e3ab7eb51767985eb0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_268.mmd
@@ -0,0 +1,104 @@
+graph LR
+    N0([start])
+    N1([Parking Assistance Systems])
+    N2[/Redundancy in Sensors/]
+    N3[(Accident Reconstruction for AVs)]
+    N4(Lane Keeping Assist)
+    N5[/Traffic Sign Recognition/]
+    N6([Vehicle Diagnostics])
+    N7[Charging Infrastructure]
+    N8{Fail_Safe Systems}
+    N9[(Regulatory Compliance)]
+    N10[Pedestrian Detection]
+    N11[Simulation and Testing]
+    N12[[Human_Machine Interface]]
+    N13([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    subgraph Ethical Decision_Making
+        nest0_0([Vehicle_to_Infrastructure Communication])
+        nest0_1(Battery Management for EVs)
+        nest0_2[Over_the_Air Updates]
+    end
+    subgraph Vehicle_to_Vehicle Communication
+        nest1_0(Simulation Environment Development)
+        nest1_1(Cloud Connectivity for AVs)
+        nest1_2{Edge Computing for AVs}
+    end
+    N0 -.-> N1
+    N1 --> |no| N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> |no| N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 -.-> |yes| N13
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N12 -.-> nest0_0
+    nest0_2 --> N12
+    nest1_0 -.-> |yes| nest1_1
+    nest1_1 -.-> nest1_2
+    N2 --> |yes| nest1_0
+    nest1_2 -.-> N10
+    N10 --> S0
+    S0 -.-> N12
+    S0 -.-> N13
+    N7 --> S1
+    S1 --> N12
+    S1 --> N13
+    S1 -.-> N9
+    N7 --> S2
+    S2 -.-> N9
+    S2 --> N10
+    S2 -.-> N12
+    N4 -.-> M0
+    N3 --> M0
+    M0 --> N8
+    style S0 fill:#FCE4EC,stroke:#F06292
+    style S1 fill:#C8E6C9,stroke:#4CAF50
+    style S2 fill:#FCE4EC,stroke:#F06292
+    style M0 fill:#E8F5E9,stroke:#66BB6A
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#66BB6A,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_268.txt b/test/mermaid/hard/mermaid_268.txt
new file mode 100644
index 0000000000000000000000000000000000000000..675c71d4466ac2f1625727e8b3bab2b699031dd9
--- /dev/null
+++ b/test/mermaid/hard/mermaid_268.txt
@@ -0,0 +1,35 @@
+<Accident Reconstruction for AVs, connectedTo, Fail_Safe Systems>
+<Accident Reconstruction for AVs, connectedTo, Lane Keeping Assist>
+<Battery Management for EVs, connectedTo, Over_the_Air Updates>
+<Battery Management for EVs, partOf, Ethical Decision_Making>
+<Charging Infrastructure, connectedTo, Fail_Safe Systems>
+<Charging Infrastructure, connectedTo, Human_Machine Interface>
+<Charging Infrastructure, connectedTo, Pedestrian Detection>
+<Charging Infrastructure, connectedTo, Regulatory Compliance>
+<Charging Infrastructure, connectedTo, end>
+<Cloud Connectivity for AVs, connectedTo, Edge Computing for AVs>
+<Cloud Connectivity for AVs, partOf, Vehicle_to_Vehicle Communication>
+<Edge Computing for AVs, connectedTo, Pedestrian Detection>
+<Edge Computing for AVs, partOf, Vehicle_to_Vehicle Communication>
+<Fail_Safe Systems, no, Regulatory Compliance>
+<Human_Machine Interface, connectedTo, Vehicle_to_Infrastructure Communication>
+<Human_Machine Interface, yes, end>
+<Lane Keeping Assist, connectedTo, Fail_Safe Systems>
+<Lane Keeping Assist, connectedTo, Traffic Sign Recognition>
+<Over_the_Air Updates, connectedTo, Human_Machine Interface>
+<Over_the_Air Updates, partOf, Ethical Decision_Making>
+<Parking Assistance Systems, no, Redundancy in Sensors>
+<Pedestrian Detection, connectedTo, Human_Machine Interface>
+<Pedestrian Detection, connectedTo, Simulation and Testing>
+<Pedestrian Detection, connectedTo, end>
+<Redundancy in Sensors, connectedTo, Accident Reconstruction for AVs>
+<Redundancy in Sensors, yes, Simulation Environment Development>
+<Regulatory Compliance, connectedTo, Pedestrian Detection>
+<Simulation Environment Development, partOf, Vehicle_to_Vehicle Communication>
+<Simulation Environment Development, yes, Cloud Connectivity for AVs>
+<Simulation and Testing, connectedTo, Human_Machine Interface>
+<Traffic Sign Recognition, connectedTo, Vehicle Diagnostics>
+<Vehicle Diagnostics, connectedTo, Charging Infrastructure>
+<Vehicle_to_Infrastructure Communication, connectedTo, Battery Management for EVs>
+<Vehicle_to_Infrastructure Communication, partOf, Ethical Decision_Making>
+<start, connectedTo, Parking Assistance Systems>
diff --git a/test/mermaid/hard/mermaid_269.mmd b/test/mermaid/hard/mermaid_269.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..1d5e47fffd2a1e7417edfbad74ca6289160a5512
--- /dev/null
+++ b/test/mermaid/hard/mermaid_269.mmd
@@ -0,0 +1,116 @@
+graph BT
+    N0([Cybersecurity for AVs])
+    N1{Public Acceptance and Trust}
+    N2{Cloud Connectivity for AVs}
+    N3[Perception System]
+    N4[[Driver Monitoring Systems]]
+    N5[Charging Infrastructure]
+    N6{Simulation Environment Development}
+    N7[(Ethical Decision_Making)]
+    N8[/Sensor Integration/]
+    N9[[Motion Control]]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Software Development
+        nest0_0[/Battery Management for EVs/]
+        nest0_1(Parking Assistance Systems)
+        nest0_2[(Decision_Making Algorithms)]
+        nest0_3{Hardware Design}
+    end
+    subgraph Data Collection and Annotation
+        nest1_0([Map Data Management])
+        nest1_1[[Pedestrian Detection]]
+        nest1_2[/Remote Operation Capability/]
+        nest1_3{Edge Computing for AVs}
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> |updates| N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> |integrates| nest0_2
+    nest0_2 --> |learns| nest0_3
+    N7 --> nest0_0
+    nest0_3 --> N7
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> nest1_3
+    N5 --> nest1_0
+    nest1_3 --> N6
+    N6 -.-> S0
+    S0 -.-> N8
+    S0 -.-> N9
+    N6 -.-> S1
+    S1 --> N8
+    S1 --> N9
+    N3 --> M0
+    N2 -.-> M0
+    N1 --> |regulates| M0
+    M0 --> N5
+    N0 -.-> M1
+    N4 -.-> |predicts| M1
+    N1 --> M1
+    M1 -.-> N6
+    style N0 fill:#F1F8E9,stroke:#388E3C
+    style N1 fill:#E4E0DF,stroke:#BDAFA8
+    style N2 fill:#E4E0DF,stroke:#BDAFA8
+    style N3 fill:#E4E0DF,stroke:#BDAFA8
+    style N4 fill:#D3F7F9,stroke:#80DDEA
+    style N5 fill:#F1F8E9,stroke:#388E3C
+    style N6 fill:#E4E0DF,stroke:#BDAFA8
+    style N7 fill:#D3F7F9,stroke:#80DDEA
+    style N8 fill:#D3F7F9,stroke:#80DDEA
+    style N9 fill:#F1F8E9,stroke:#388E3C
+    style S0 fill:#D3F7F9,stroke:#80DDEA
+    style S1 fill:#F1F8E9,stroke:#388E3C
+    style M0 fill:#F1F8E9,stroke:#388E3C
+    style M1 fill:#E4E0DF,stroke:#BDAFA8
+    style nest0_0 fill:#E4E0DF,stroke:#BDAFA8
+    style nest0_1 fill:#F1F8E9,stroke:#388E3C
+    style nest0_2 fill:#E4E0DF,stroke:#BDAFA8
+    style nest0_3 fill:#D3F7F9,stroke:#80DDEA
+    style nest1_0 fill:#F1F8E9,stroke:#388E3C
+    style nest1_1 fill:#F1F8E9,stroke:#388E3C
+    style nest1_2 fill:#D3F7F9,stroke:#80DDEA
+    style nest1_3 fill:#D3F7F9,stroke:#80DDEA
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_269.txt b/test/mermaid/hard/mermaid_269.txt
new file mode 100644
index 0000000000000000000000000000000000000000..a5ac3693cabfe66b1a9e9c32575eba4254b665fe
--- /dev/null
+++ b/test/mermaid/hard/mermaid_269.txt
@@ -0,0 +1,35 @@
+<Battery Management for EVs, connectedTo, Parking Assistance Systems>
+<Battery Management for EVs, partOf, Software Development>
+<Charging Infrastructure, connectedTo, Map Data Management>
+<Charging Infrastructure, connectedTo, Simulation Environment Development>
+<Cloud Connectivity for AVs, connectedTo, Charging Infrastructure>
+<Cloud Connectivity for AVs, updates, Perception System>
+<Cybersecurity for AVs, connectedTo, Public Acceptance and Trust>
+<Cybersecurity for AVs, connectedTo, Simulation Environment Development>
+<Decision_Making Algorithms, learns, Hardware Design>
+<Decision_Making Algorithms, partOf, Software Development>
+<Driver Monitoring Systems, connectedTo, Charging Infrastructure>
+<Driver Monitoring Systems, predicts, Simulation Environment Development>
+<Edge Computing for AVs, connectedTo, Simulation Environment Development>
+<Edge Computing for AVs, partOf, Data Collection and Annotation>
+<Ethical Decision_Making, connectedTo, Battery Management for EVs>
+<Ethical Decision_Making, connectedTo, Sensor Integration>
+<Hardware Design, connectedTo, Ethical Decision_Making>
+<Hardware Design, partOf, Software Development>
+<Map Data Management, connectedTo, Pedestrian Detection>
+<Map Data Management, partOf, Data Collection and Annotation>
+<Parking Assistance Systems, integrates, Decision_Making Algorithms>
+<Parking Assistance Systems, partOf, Software Development>
+<Pedestrian Detection, connectedTo, Remote Operation Capability>
+<Pedestrian Detection, partOf, Data Collection and Annotation>
+<Perception System, connectedTo, Charging Infrastructure>
+<Perception System, connectedTo, Driver Monitoring Systems>
+<Public Acceptance and Trust, connectedTo, Cloud Connectivity for AVs>
+<Public Acceptance and Trust, connectedTo, Simulation Environment Development>
+<Public Acceptance and Trust, regulates, Charging Infrastructure>
+<Remote Operation Capability, connectedTo, Edge Computing for AVs>
+<Remote Operation Capability, partOf, Data Collection and Annotation>
+<Sensor Integration, connectedTo, Motion Control>
+<Simulation Environment Development, connectedTo, Ethical Decision_Making>
+<Simulation Environment Development, connectedTo, Motion Control>
+<Simulation Environment Development, connectedTo, Sensor Integration>
diff --git a/test/mermaid/hard/mermaid_27.mmd b/test/mermaid/hard/mermaid_27.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..3335cde2c56c17f86f186ae5db9df81d2e7dd30e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_27.mmd
@@ -0,0 +1,140 @@
+graph RL
+    N0([start])
+    N1[[Consolidation]]
+    N2(Damage Reporting)
+    N3[[Supply Chain Visibility]]
+    N4(Packing Process)
+    N5(Deconsolidation)
+    N6[/Sorting Center/]
+    N7[Package Labeling]
+    N8[Delay Notification]
+    N9[Hub Transfer]
+    N10[/Global Trade Compliance/]
+    N11[Hazardous Material Transport]
+    N12[Pickup Request]
+    N13[/Rail Transport Coordination/]
+    N14([Return Logistics])
+    N15(Cold Chain Management)
+    N16[/Customs Clearance/]
+    N17([Cross_docking])
+    S0(( ))
+    S1(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Ocean Freight Management
+        nest0_0[[Inventory Sync]]
+        nest0_1[Demand Forecasting Integration]
+    end
+    subgraph Route Optimization Software
+        nest1_0{Pallet Stacking}
+        nest1_1[Warehouse Entry]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 -.-> N16
+    N16 -.-> N17
+    nest0_0 -.-> nest0_1
+    N8 -.-> nest0_0
+    nest0_1 -.-> N2
+    nest1_0 --> nest1_1
+    N4 -.-> nest1_0
+    nest1_1 --> N10
+    N5 -.-> S0
+    S0 -.-> N9
+    S0 --> N10
+    S0 --> N16
+    S0 -.-> N15
+    N8 --> S1
+    S1 --> N17
+    S1 -.-> N11
+    S1 -.-> N16
+    S1 -.-> |transfers| N15
+    N5 -.-> M1
+    N0 -.-> M1
+    N3 --> M1
+    M1 -.-> N7
+    N2 -.-> M2
+    N3 --> M2
+    N4 -.-> M2
+    M2 --> N7
+    style N0 fill:#E0E6E9,stroke:#AABEC6
+    style N1 fill:#EBEBEB,stroke:#E0E0E0
+    style N2 fill:#E0E6E9,stroke:#AABEC6
+    style N3 fill:#E0E6E9,stroke:#AABEC6
+    style N4 fill:#FCE4EC,stroke:#E91E63
+    style N5 fill:#EBEBEB,stroke:#E0E0E0
+    style N6 fill:#FCE4EC,stroke:#E91E63
+    style N7 fill:#FCE4EC,stroke:#E91E63
+    style N8 fill:#E0E6E9,stroke:#AABEC6
+    style N9 fill:#E0E6E9,stroke:#AABEC6
+    style N10 fill:#E0E6E9,stroke:#AABEC6
+    style N11 fill:#EBEBEB,stroke:#E0E0E0
+    style N12 fill:#EBEBEB,stroke:#E0E0E0
+    style N13 fill:#E0E6E9,stroke:#AABEC6
+    style N14 fill:#EBEBEB,stroke:#E0E0E0
+    style N15 fill:#FCE4EC,stroke:#E91E63
+    style N16 fill:#EBEBEB,stroke:#E0E0E0
+    style N17 fill:#FCE4EC,stroke:#E91E63
+    style S0 fill:#FCE4EC,stroke:#E91E63
+    style S1 fill:#EBEBEB,stroke:#E0E0E0
+    style M1 fill:#E0E6E9,stroke:#AABEC6
+    style M2 fill:#E0E6E9,stroke:#AABEC6
+    style nest0_0 fill:#E0E6E9,stroke:#AABEC6
+    style nest0_1 fill:#E0E6E9,stroke:#AABEC6
+    style nest1_0 fill:#E0E6E9,stroke:#AABEC6
+    style nest1_1 fill:#E0E6E9,stroke:#AABEC6
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#E91E63,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_27.txt b/test/mermaid/hard/mermaid_27.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ab0ee2e10e83cd7d4e41841313bf23a72979d46b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_27.txt
@@ -0,0 +1,40 @@
+<Cold Chain Management, connectedTo, Customs Clearance>
+<Consolidation, connectedTo, Damage Reporting>
+<Customs Clearance, connectedTo, Cross_docking>
+<Damage Reporting, connectedTo, Package Labeling>
+<Damage Reporting, connectedTo, Supply Chain Visibility>
+<Deconsolidation, connectedTo, Cold Chain Management>
+<Deconsolidation, connectedTo, Customs Clearance>
+<Deconsolidation, connectedTo, Global Trade Compliance>
+<Deconsolidation, connectedTo, Hub Transfer>
+<Deconsolidation, connectedTo, Package Labeling>
+<Deconsolidation, connectedTo, Sorting Center>
+<Delay Notification, connectedTo, Cross_docking>
+<Delay Notification, connectedTo, Customs Clearance>
+<Delay Notification, connectedTo, Hazardous Material Transport>
+<Delay Notification, connectedTo, Hub Transfer>
+<Delay Notification, connectedTo, Inventory Sync>
+<Delay Notification, transfers, Cold Chain Management>
+<Demand Forecasting Integration, connectedTo, Damage Reporting>
+<Demand Forecasting Integration, partOf, Ocean Freight Management>
+<Global Trade Compliance, connectedTo, Hazardous Material Transport>
+<Hazardous Material Transport, connectedTo, Pickup Request>
+<Hub Transfer, connectedTo, Global Trade Compliance>
+<Inventory Sync, connectedTo, Demand Forecasting Integration>
+<Inventory Sync, partOf, Ocean Freight Management>
+<Package Labeling, connectedTo, Delay Notification>
+<Packing Process, connectedTo, Deconsolidation>
+<Packing Process, connectedTo, Package Labeling>
+<Packing Process, connectedTo, Pallet Stacking>
+<Pallet Stacking, connectedTo, Warehouse Entry>
+<Pallet Stacking, partOf, Route Optimization Software>
+<Pickup Request, connectedTo, Rail Transport Coordination>
+<Rail Transport Coordination, connectedTo, Return Logistics>
+<Return Logistics, connectedTo, Cold Chain Management>
+<Sorting Center, connectedTo, Package Labeling>
+<Supply Chain Visibility, connectedTo, Package Labeling>
+<Supply Chain Visibility, connectedTo, Packing Process>
+<Warehouse Entry, connectedTo, Global Trade Compliance>
+<Warehouse Entry, partOf, Route Optimization Software>
+<start, connectedTo, Consolidation>
+<start, connectedTo, Package Labeling>
diff --git a/test/mermaid/hard/mermaid_270.mmd b/test/mermaid/hard/mermaid_270.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..8a82f037e0159f44029820d3d967e7593778774f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_270.mmd
@@ -0,0 +1,124 @@
+graph RL
+    N0([start])
+    N1[Predictive Maintenance]
+    N2(Object Detection and Classification)
+    N3{Vehicle_to_Infrastructure Communication}
+    N4([Accident Reconstruction for AVs])
+    N5(Remote Operation Capability)
+    N6([Public Acceptance and Trust])
+    N7[(Simulation and Testing)]
+    N8(Vehicle Diagnostics)
+    N9{Vehicle_to_Vehicle Communication}
+    N10[[Fail_Safe Systems]]
+    N11([Traffic Sign Recognition])
+    N12(Hardware Design)
+    N13[[Ethical Decision_Making]]
+    N14(Path Planning)
+    N15([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    subgraph Cloud Connectivity for AVs
+        nest0_0[[Parking Assistance Systems]]
+        nest0_1[Charging Infrastructure]
+        nest0_2(Perception System)
+    end
+    subgraph Lane Keeping Assist
+        nest1_0([Human_Machine Interface])
+        nest1_1([Edge Computing for AVs])
+        nest1_2[[Pedestrian Detection]]
+    end
+    N0 -.-> |certifies| N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> |validates| N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N3 -.-> nest0_0
+    nest0_2 -.-> N15
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N10 -.-> nest1_0
+    nest1_2 -.-> N7
+    N6 --> S0
+    S0 -.-> N15
+    S0 --> N12
+    N10 -.-> S1
+    S1 -.-> N14
+    S1 --> N12
+    N1 --> |alerts| M0
+    N2 -.-> M0
+    N0 -.-> M0
+    M0 --> N5
+    N6 --> N14
+    style N0 fill:#E0F7FA,stroke:#00BCD4
+    style N1 fill:#E0F7FA,stroke:#00BCD4
+    style N2 fill:#E8F0FF,stroke:#A2D0FF
+    style N3 fill:#E8F0FF,stroke:#A2D0FF
+    style N4 fill:#E0F7FA,stroke:#00BCD4
+    style N5 fill:#C8E6C9,stroke:#388E3C
+    style N6 fill:#E0F7FA,stroke:#00BCD4
+    style N7 fill:#E8F0FF,stroke:#A2D0FF
+    style N8 fill:#E8F0FF,stroke:#A2D0FF
+    style N9 fill:#E0F7FA,stroke:#00BCD4
+    style N10 fill:#E8F0FF,stroke:#A2D0FF
+    style N11 fill:#C8E6C9,stroke:#388E3C
+    style N12 fill:#E0F7FA,stroke:#00BCD4
+    style N13 fill:#E0F7FA,stroke:#00BCD4
+    style N14 fill:#C8E6C9,stroke:#388E3C
+    style N15 fill:#E8F0FF,stroke:#A2D0FF
+    style S0 fill:#E0F7FA,stroke:#00BCD4
+    style S1 fill:#E8F0FF,stroke:#A2D0FF
+    style M0 fill:#E0F7FA,stroke:#00BCD4
+    style nest0_0 fill:#E8F0FF,stroke:#A2D0FF
+    style nest0_1 fill:#E8F0FF,stroke:#A2D0FF
+    style nest0_2 fill:#C8E6C9,stroke:#388E3C
+    style nest1_0 fill:#C8E6C9,stroke:#388E3C
+    style nest1_1 fill:#E8F0FF,stroke:#A2D0FF
+    style nest1_2 fill:#E0F7FA,stroke:#00BCD4
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#00BCD4,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_270.txt b/test/mermaid/hard/mermaid_270.txt
new file mode 100644
index 0000000000000000000000000000000000000000..1daca8cc103ba986a71e27923cec06bb1a39b070
--- /dev/null
+++ b/test/mermaid/hard/mermaid_270.txt
@@ -0,0 +1,37 @@
+<Accident Reconstruction for AVs, validates, Remote Operation Capability>
+<Charging Infrastructure, connectedTo, Perception System>
+<Charging Infrastructure, partOf, Cloud Connectivity for AVs>
+<Edge Computing for AVs, connectedTo, Pedestrian Detection>
+<Edge Computing for AVs, partOf, Lane Keeping Assist>
+<Ethical Decision_Making, connectedTo, Path Planning>
+<Fail_Safe Systems, connectedTo, Hardware Design>
+<Fail_Safe Systems, connectedTo, Human_Machine Interface>
+<Fail_Safe Systems, connectedTo, Path Planning>
+<Fail_Safe Systems, connectedTo, Traffic Sign Recognition>
+<Hardware Design, connectedTo, Ethical Decision_Making>
+<Human_Machine Interface, connectedTo, Edge Computing for AVs>
+<Human_Machine Interface, partOf, Lane Keeping Assist>
+<Object Detection and Classification, connectedTo, Remote Operation Capability>
+<Object Detection and Classification, connectedTo, Vehicle_to_Infrastructure Communication>
+<Parking Assistance Systems, connectedTo, Charging Infrastructure>
+<Parking Assistance Systems, partOf, Cloud Connectivity for AVs>
+<Path Planning, connectedTo, end>
+<Pedestrian Detection, connectedTo, Simulation and Testing>
+<Pedestrian Detection, partOf, Lane Keeping Assist>
+<Perception System, connectedTo, end>
+<Perception System, partOf, Cloud Connectivity for AVs>
+<Predictive Maintenance, alerts, Remote Operation Capability>
+<Predictive Maintenance, connectedTo, Object Detection and Classification>
+<Public Acceptance and Trust, connectedTo, Hardware Design>
+<Public Acceptance and Trust, connectedTo, Path Planning>
+<Public Acceptance and Trust, connectedTo, Simulation and Testing>
+<Public Acceptance and Trust, connectedTo, end>
+<Remote Operation Capability, connectedTo, Public Acceptance and Trust>
+<Simulation and Testing, connectedTo, Vehicle Diagnostics>
+<Traffic Sign Recognition, connectedTo, Hardware Design>
+<Vehicle Diagnostics, connectedTo, Vehicle_to_Vehicle Communication>
+<Vehicle_to_Infrastructure Communication, connectedTo, Accident Reconstruction for AVs>
+<Vehicle_to_Infrastructure Communication, connectedTo, Parking Assistance Systems>
+<Vehicle_to_Vehicle Communication, connectedTo, Fail_Safe Systems>
+<start, certifies, Predictive Maintenance>
+<start, connectedTo, Remote Operation Capability>
diff --git a/test/mermaid/hard/mermaid_271.mmd b/test/mermaid/hard/mermaid_271.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..fdb7adfa890884bc40e5274f5ecfaf7b352b0972
--- /dev/null
+++ b/test/mermaid/hard/mermaid_271.mmd
@@ -0,0 +1,130 @@
+graph BT
+    N0([User Rating and Feedback Systems])
+    N1(Data Analytics for Usage Patterns)
+    N2[Scooter_sharing Services]
+    N3(Vehicle Booking)
+    N4([First_Mile or Last_Mile Solutions])
+    N5{Passenger Safety Protocols}
+    N6{Ticketing and Fare Collection}
+    N7{Geofencing for Operations}
+    N8[Insurance Models]
+    N9{Car_sharing Services}
+    N10(Sustainability Initiatives)
+    N11(Accessibility for Users)
+    N12{Dynamic Pricing}
+    N13([Ride_sharing Services])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph User Registration
+        nest0_0(Vehicle Location Tracking)
+        nest0_1[[Demand Prediction]]
+        nest0_2[Maintenance Scheduling]
+        nest0_3[/Public_Private Partnerships/]
+    end
+    subgraph Fraud Prevention
+        nest1_0[/Autonomous Shared Vehicles/]
+        nest1_1[(Smart City Integration)]
+    end
+    N0 --> N1
+    N1 --> |complies| N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> |locates| N5
+    N5 --> |pays| N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N6 --> nest0_0
+    nest0_3 -.-> N4
+    nest1_0 --> |charges| nest1_1
+    N12 --> nest1_0
+    nest1_1 -.-> N11
+    N3 -.-> S0
+    S0 --> N5
+    S0 -.-> N10
+    S0 -.-> N12
+    S0 --> N7
+    N10 --> S1
+    S1 --> |secures| N13
+    S1 --> N12
+    N3 -.-> M0
+    N1 --> |educates| M0
+    N0 --> M0
+    M0 --> N10
+    N4 --> M2
+    N8 --> M2
+    N7 -.-> M2
+    N10 --> M2
+    M2 -.-> N12
+    style N0 fill:#D0E0F8,stroke:#4285F4
+    style N1 fill:#DED7F0,stroke:#A188DB
+    style N2 fill:#DED7F0,stroke:#A188DB
+    style N3 fill:#DED7F0,stroke:#A188DB
+    style N4 fill:#FFCCBC,stroke:#FF5722
+    style N5 fill:#D0E0F8,stroke:#4285F4
+    style N6 fill:#FFCCBC,stroke:#FF5722
+    style N7 fill:#D0E0F8,stroke:#4285F4
+    style N8 fill:#DED7F0,stroke:#A188DB
+    style N9 fill:#FFCCBC,stroke:#FF5722
+    style N10 fill:#DED7F0,stroke:#A188DB
+    style N11 fill:#DED7F0,stroke:#A188DB
+    style N12 fill:#DED7F0,stroke:#A188DB
+    style N13 fill:#FFCCBC,stroke:#FF5722
+    style S0 fill:#D0E0F8,stroke:#4285F4
+    style S1 fill:#DED7F0,stroke:#A188DB
+    style M0 fill:#DED7F0,stroke:#A188DB
+    style M2 fill:#D0E0F8,stroke:#4285F4
+    style nest0_0 fill:#DED7F0,stroke:#A188DB
+    style nest0_1 fill:#DED7F0,stroke:#A188DB
+    style nest0_2 fill:#DED7F0,stroke:#A188DB
+    style nest0_3 fill:#DED7F0,stroke:#A188DB
+    style nest1_0 fill:#FFCCBC,stroke:#FF5722
+    style nest1_1 fill:#FFCCBC,stroke:#FF5722
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#A188DB,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_271.txt b/test/mermaid/hard/mermaid_271.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e3f14288df012594015fcc179df564d652b161f6
--- /dev/null
+++ b/test/mermaid/hard/mermaid_271.txt
@@ -0,0 +1,38 @@
+<Accessibility for Users, connectedTo, Dynamic Pricing>
+<Autonomous Shared Vehicles, charges, Smart City Integration>
+<Autonomous Shared Vehicles, partOf, Fraud Prevention>
+<Car_sharing Services, connectedTo, Sustainability Initiatives>
+<Data Analytics for Usage Patterns, complies, Scooter_sharing Services>
+<Data Analytics for Usage Patterns, educates, Sustainability Initiatives>
+<Demand Prediction, connectedTo, Maintenance Scheduling>
+<Demand Prediction, partOf, User Registration>
+<Dynamic Pricing, connectedTo, Autonomous Shared Vehicles>
+<Dynamic Pricing, connectedTo, Ride_sharing Services>
+<First_Mile or Last_Mile Solutions, connectedTo, Dynamic Pricing>
+<First_Mile or Last_Mile Solutions, locates, Passenger Safety Protocols>
+<Geofencing for Operations, connectedTo, Dynamic Pricing>
+<Geofencing for Operations, connectedTo, Insurance Models>
+<Insurance Models, connectedTo, Car_sharing Services>
+<Insurance Models, connectedTo, Dynamic Pricing>
+<Maintenance Scheduling, connectedTo, Public_Private Partnerships>
+<Maintenance Scheduling, partOf, User Registration>
+<Passenger Safety Protocols, pays, Ticketing and Fare Collection>
+<Public_Private Partnerships, connectedTo, First_Mile or Last_Mile Solutions>
+<Public_Private Partnerships, partOf, User Registration>
+<Scooter_sharing Services, connectedTo, Vehicle Booking>
+<Smart City Integration, connectedTo, Accessibility for Users>
+<Smart City Integration, partOf, Fraud Prevention>
+<Sustainability Initiatives, connectedTo, Accessibility for Users>
+<Sustainability Initiatives, connectedTo, Dynamic Pricing>
+<Sustainability Initiatives, secures, Ride_sharing Services>
+<Ticketing and Fare Collection, connectedTo, Geofencing for Operations>
+<Ticketing and Fare Collection, connectedTo, Vehicle Location Tracking>
+<User Rating and Feedback Systems, connectedTo, Data Analytics for Usage Patterns>
+<User Rating and Feedback Systems, connectedTo, Sustainability Initiatives>
+<Vehicle Booking, connectedTo, Dynamic Pricing>
+<Vehicle Booking, connectedTo, First_Mile or Last_Mile Solutions>
+<Vehicle Booking, connectedTo, Geofencing for Operations>
+<Vehicle Booking, connectedTo, Passenger Safety Protocols>
+<Vehicle Booking, connectedTo, Sustainability Initiatives>
+<Vehicle Location Tracking, connectedTo, Demand Prediction>
+<Vehicle Location Tracking, partOf, User Registration>
diff --git a/test/mermaid/hard/mermaid_272.mmd b/test/mermaid/hard/mermaid_272.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..644d541bd40ec147906f6cf10c651901d17540cc
--- /dev/null
+++ b/test/mermaid/hard/mermaid_272.mmd
@@ -0,0 +1,116 @@
+graph BT
+    N0([Bike_sharing Services])
+    N1([Ride_sharing Services])
+    N2(Charging or Refueling Logistics)
+    N3([Public Transit Integration])
+    N4[User Rating and Feedback Systems]
+    N5[/Ticketing and Fare Collection/]
+    N6([Maintenance Scheduling])
+    N7[Vehicle Booking]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Vehicle Rebalancing
+        nest0_0[Route Optimization]
+        nest0_1{Data Analytics for Usage Patterns}
+        nest0_2(Driver Management)
+        nest0_3[(Platform Development)]
+    end
+    subgraph Fraud Prevention
+        nest1_0(Scooter_sharing Services)
+        nest1_1[Autonomous Shared Vehicles]
+        nest1_2{Public_Private Partnerships}
+        nest1_3(Subscription Model Management)
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> |insures| N3
+    N3 --> |maintains| N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N3 -.-> nest0_0
+    nest0_3 -.-> N7
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N6 -.-> nest1_0
+    nest1_3 -.-> N3
+    N3 -.-> S0
+    S0 -.-> N7
+    S0 -.-> N6
+    N4 --> S1
+    S1 -.-> N7
+    S1 -.-> N6
+    N3 -.-> M0
+    N0 -.-> M0
+    N2 --> M0
+    M0 -.-> N5
+    N2 -.-> M1
+    N0 --> M1
+    N1 -.-> M1
+    M1 --> N4
+    N0 --> |optimizes| M2
+    N1 -.-> M2
+    M2 -.-> N5
+    style N0 fill:#F3E5F5,stroke:#AB47BC
+    style N1 fill:#F3E5F5,stroke:#AB47BC
+    style N2 fill:#E0F2F1,stroke:#26A69A
+    style N3 fill:#FFFCE6,stroke:#FFF9AE
+    style N4 fill:#FFFCE6,stroke:#FFF9AE
+    style N5 fill:#F3E5F5,stroke:#AB47BC
+    style N6 fill:#F3E5F5,stroke:#AB47BC
+    style N7 fill:#E0F2F1,stroke:#26A69A
+    style S0 fill:#F3E5F5,stroke:#AB47BC
+    style S1 fill:#F3E5F5,stroke:#AB47BC
+    style M0 fill:#F3E5F5,stroke:#AB47BC
+    style M1 fill:#F3E5F5,stroke:#AB47BC
+    style M2 fill:#F3E5F5,stroke:#AB47BC
+    style nest0_0 fill:#E0F2F1,stroke:#26A69A
+    style nest0_1 fill:#E0F2F1,stroke:#26A69A
+    style nest0_2 fill:#FFFCE6,stroke:#FFF9AE
+    style nest0_3 fill:#FFFCE6,stroke:#FFF9AE
+    style nest1_0 fill:#E0F2F1,stroke:#26A69A
+    style nest1_1 fill:#FFFCE6,stroke:#FFF9AE
+    style nest1_2 fill:#FFFCE6,stroke:#FFF9AE
+    style nest1_3 fill:#FFFCE6,stroke:#FFF9AE
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_273.mmd b/test/mermaid/hard/mermaid_273.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..d5ff2deefb3c4ec24cb9e5050f1f8c37b4192d3d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_273.mmd
@@ -0,0 +1,122 @@
+graph LR
+    N0([start])
+    N1{Charging or Refueling Logistics}
+    N2[Parking Integration]
+    N3([Dynamic Pricing])
+    N4[/Ride_sharing Services/]
+    N5[Geofencing for Operations]
+    N6{Ticketing and Fare Collection}
+    N7[First_Mile or Last_Mile Solutions]
+    N8{Micro_mobility Management}
+    N9(Data Analytics for Usage Patterns)
+    N10(Customer Support)
+    N11{Sustainability Initiatives}
+    N12[Car_sharing Services]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Regulatory Compliance
+        nest0_0(Public Transit Integration)
+        nest0_1{Scooter_sharing Services}
+        nest0_2(Passenger Safety Protocols)
+        nest0_3{Autonomous Shared Vehicles}
+    end
+    subgraph Platform Development
+        nest1_0[/Demand Prediction/]
+        nest1_1[(Driver Management)]
+        nest1_2[User Registration]
+    end
+    N0 -.-> N1
+    N1 -.-> |cleans| N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> |manages| N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N3 --> nest0_0
+    nest0_3 --> N3
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N4 --> nest1_0
+    nest1_2 --> N2
+    N3 -.-> S0
+    S0 -.-> N5
+    S0 --> |verifies| N12
+    S0 -.-> N11
+    N1 -.-> S1
+    S1 -.-> N6
+    S1 --> N12
+    N2 -.-> |pays| M0
+    N4 --> M0
+    M0 -.-> N7
+    N3 -.-> M1
+    N1 -.-> |educates| M1
+    M1 -.-> N7
+    style N0 fill:#DED7F0,stroke:#A188DB
+    style N1 fill:#D0EFEE,stroke:#73C6BC
+    style N2 fill:#F1F8E9,stroke:#81C784
+    style N3 fill:#F1F8E9,stroke:#81C784
+    style N4 fill:#D0EFEE,stroke:#73C6BC
+    style N5 fill:#F1F8E9,stroke:#81C784
+    style N6 fill:#DED7F0,stroke:#A188DB
+    style N7 fill:#D0EFEE,stroke:#73C6BC
+    style N8 fill:#D0EFEE,stroke:#73C6BC
+    style N9 fill:#D0EFEE,stroke:#73C6BC
+    style N10 fill:#D0EFEE,stroke:#73C6BC
+    style N11 fill:#DED7F0,stroke:#A188DB
+    style N12 fill:#D0EFEE,stroke:#73C6BC
+    style S0 fill:#F1F8E9,stroke:#81C784
+    style S1 fill:#DED7F0,stroke:#A188DB
+    style M0 fill:#D0EFEE,stroke:#73C6BC
+    style M1 fill:#DED7F0,stroke:#A188DB
+    style nest0_0 fill:#DED7F0,stroke:#A188DB
+    style nest0_1 fill:#DED7F0,stroke:#A188DB
+    style nest0_2 fill:#DED7F0,stroke:#A188DB
+    style nest0_3 fill:#F1F8E9,stroke:#81C784
+    style nest1_0 fill:#D0EFEE,stroke:#73C6BC
+    style nest1_1 fill:#DED7F0,stroke:#A188DB
+    style nest1_2 fill:#F1F8E9,stroke:#81C784
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#A188DB,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_273.txt b/test/mermaid/hard/mermaid_273.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e6ff57793234667d5d08777c405fe48e45ed921a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_273.txt
@@ -0,0 +1,37 @@
+<Autonomous Shared Vehicles, connectedTo, Dynamic Pricing>
+<Autonomous Shared Vehicles, partOf, Regulatory Compliance>
+<Charging or Refueling Logistics, cleans, Parking Integration>
+<Charging or Refueling Logistics, connectedTo, Car_sharing Services>
+<Charging or Refueling Logistics, connectedTo, Ticketing and Fare Collection>
+<Charging or Refueling Logistics, educates, First_Mile or Last_Mile Solutions>
+<Customer Support, connectedTo, Sustainability Initiatives>
+<Data Analytics for Usage Patterns, connectedTo, Customer Support>
+<Demand Prediction, connectedTo, Driver Management>
+<Demand Prediction, partOf, Platform Development>
+<Driver Management, connectedTo, User Registration>
+<Driver Management, partOf, Platform Development>
+<Dynamic Pricing, connectedTo, First_Mile or Last_Mile Solutions>
+<Dynamic Pricing, connectedTo, Geofencing for Operations>
+<Dynamic Pricing, connectedTo, Public Transit Integration>
+<Dynamic Pricing, connectedTo, Ride_sharing Services>
+<Dynamic Pricing, connectedTo, Sustainability Initiatives>
+<Dynamic Pricing, verifies, Car_sharing Services>
+<First_Mile or Last_Mile Solutions, manages, Micro_mobility Management>
+<Geofencing for Operations, connectedTo, Ticketing and Fare Collection>
+<Micro_mobility Management, connectedTo, Data Analytics for Usage Patterns>
+<Parking Integration, connectedTo, Dynamic Pricing>
+<Parking Integration, pays, First_Mile or Last_Mile Solutions>
+<Passenger Safety Protocols, connectedTo, Autonomous Shared Vehicles>
+<Passenger Safety Protocols, partOf, Regulatory Compliance>
+<Public Transit Integration, connectedTo, Scooter_sharing Services>
+<Public Transit Integration, partOf, Regulatory Compliance>
+<Ride_sharing Services, connectedTo, Demand Prediction>
+<Ride_sharing Services, connectedTo, First_Mile or Last_Mile Solutions>
+<Ride_sharing Services, connectedTo, Geofencing for Operations>
+<Scooter_sharing Services, connectedTo, Passenger Safety Protocols>
+<Scooter_sharing Services, partOf, Regulatory Compliance>
+<Sustainability Initiatives, connectedTo, Car_sharing Services>
+<Ticketing and Fare Collection, connectedTo, First_Mile or Last_Mile Solutions>
+<User Registration, connectedTo, Parking Integration>
+<User Registration, partOf, Platform Development>
+<start, connectedTo, Charging or Refueling Logistics>
diff --git a/test/mermaid/hard/mermaid_274.mmd b/test/mermaid/hard/mermaid_274.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..9325fc41c823048ac7b5bb27256e39a3f587bdd8
--- /dev/null
+++ b/test/mermaid/hard/mermaid_274.mmd
@@ -0,0 +1,128 @@
+graph LR
+    N0([start])
+    N1[/Mobile Parking Apps/]
+    N2[(Real_Time Information Display)]
+    N3[(Reservations System)]
+    N4([Integration with Navigation Apps])
+    N5{Electric Vehicle Charging Integration}
+    N6{Cloud_based Parking Platforms}
+    N7[Dynamic Pricing]
+    N8[Maintenance of Systems]
+    N9(IoT Sensors for Parking)
+    N10[(Vacancy Monitoring)]
+    N11{Customer Support}
+    N12[(Environmental Impact Monitoring)]
+    N13[License Plate Recognition]
+    N14[On_Street Parking Management]
+    N15([end])
+    S0(( ))
+    S1(( ))
+    M1(( ))
+    subgraph Event Parking Management
+        nest0_0(Ticketing System Integration)
+        nest0_1(Fleet Parking Solutions)
+        nest0_2[(Space Detection)]
+        nest0_3[Navigation to Open Space]
+    end
+    subgraph Demand Forecasting
+        nest1_0[Off_Street Parking Management]
+        nest1_1[Smart City Integration for Parking]
+        nest1_2[[Emergency Vehicle Access Management]]
+    end
+    N0 --> N1
+    N1 --> |navigates| N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> |manages| N11
+    N11 --> |reports| N12
+    N12 --> N13
+    N13 --> N14
+    N14 -.-> N15
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> |integrates| nest0_3
+    N13 --> nest0_0
+    nest0_3 -.-> N9
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N2 -.-> nest1_0
+    nest1_2 -.-> N4
+    N9 --> S0
+    S0 -.-> N12
+    S0 -.-> N13
+    S0 -.-> N14
+    N11 -.-> S1
+    S1 --> N15
+    S1 --> |filters| N14
+    S1 --> N13
+    N7 --> M1
+    N1 -.-> M1
+    M1 --> N10
+    style N0 fill:#D3F7F9,stroke:#80DDEA
+    style N1 fill:#C9F0F0,stroke:#4DD0E1
+    style N2 fill:#FFF8E1,stroke:#FFD54F
+    style N3 fill:#D3F7F9,stroke:#80DDEA
+    style N4 fill:#C9F0F0,stroke:#4DD0E1
+    style N5 fill:#C9F0F0,stroke:#4DD0E1
+    style N6 fill:#D3F7F9,stroke:#80DDEA
+    style N7 fill:#D3F7F9,stroke:#80DDEA
+    style N8 fill:#D3F7F9,stroke:#80DDEA
+    style N9 fill:#D3F7F9,stroke:#80DDEA
+    style N10 fill:#FFF8E1,stroke:#FFD54F
+    style N11 fill:#C9F0F0,stroke:#4DD0E1
+    style N12 fill:#FFF8E1,stroke:#FFD54F
+    style N13 fill:#C9F0F0,stroke:#4DD0E1
+    style N14 fill:#FFF8E1,stroke:#FFD54F
+    style N15 fill:#FFF8E1,stroke:#FFD54F
+    style S0 fill:#C9F0F0,stroke:#4DD0E1
+    style S1 fill:#C9F0F0,stroke:#4DD0E1
+    style M1 fill:#D3F7F9,stroke:#80DDEA
+    style nest0_0 fill:#D3F7F9,stroke:#80DDEA
+    style nest0_1 fill:#D3F7F9,stroke:#80DDEA
+    style nest0_2 fill:#FFF8E1,stroke:#FFD54F
+    style nest0_3 fill:#C9F0F0,stroke:#4DD0E1
+    style nest1_0 fill:#FFF8E1,stroke:#FFD54F
+    style nest1_1 fill:#FFF8E1,stroke:#FFD54F
+    style nest1_2 fill:#C9F0F0,stroke:#4DD0E1
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_274.txt b/test/mermaid/hard/mermaid_274.txt
new file mode 100644
index 0000000000000000000000000000000000000000..8cb858df26aecbd3ad6762f5315012c006ad56f5
--- /dev/null
+++ b/test/mermaid/hard/mermaid_274.txt
@@ -0,0 +1,39 @@
+<Cloud_based Parking Platforms, connectedTo, Dynamic Pricing>
+<Customer Support, connectedTo, License Plate Recognition>
+<Customer Support, connectedTo, end>
+<Customer Support, filters, On_Street Parking Management>
+<Customer Support, reports, Environmental Impact Monitoring>
+<Dynamic Pricing, connectedTo, Maintenance of Systems>
+<Dynamic Pricing, connectedTo, Vacancy Monitoring>
+<Electric Vehicle Charging Integration, connectedTo, Cloud_based Parking Platforms>
+<Emergency Vehicle Access Management, connectedTo, Integration with Navigation Apps>
+<Emergency Vehicle Access Management, partOf, Demand Forecasting>
+<Environmental Impact Monitoring, connectedTo, License Plate Recognition>
+<Fleet Parking Solutions, connectedTo, Space Detection>
+<Fleet Parking Solutions, partOf, Event Parking Management>
+<Integration with Navigation Apps, connectedTo, Electric Vehicle Charging Integration>
+<IoT Sensors for Parking, connectedTo, Environmental Impact Monitoring>
+<IoT Sensors for Parking, connectedTo, License Plate Recognition>
+<IoT Sensors for Parking, connectedTo, On_Street Parking Management>
+<IoT Sensors for Parking, connectedTo, Vacancy Monitoring>
+<License Plate Recognition, connectedTo, On_Street Parking Management>
+<License Plate Recognition, connectedTo, Ticketing System Integration>
+<Maintenance of Systems, connectedTo, IoT Sensors for Parking>
+<Mobile Parking Apps, connectedTo, Vacancy Monitoring>
+<Mobile Parking Apps, navigates, Real_Time Information Display>
+<Navigation to Open Space, connectedTo, IoT Sensors for Parking>
+<Navigation to Open Space, partOf, Event Parking Management>
+<Off_Street Parking Management, connectedTo, Smart City Integration for Parking>
+<Off_Street Parking Management, partOf, Demand Forecasting>
+<On_Street Parking Management, connectedTo, end>
+<Real_Time Information Display, connectedTo, Off_Street Parking Management>
+<Real_Time Information Display, connectedTo, Reservations System>
+<Reservations System, connectedTo, Integration with Navigation Apps>
+<Smart City Integration for Parking, connectedTo, Emergency Vehicle Access Management>
+<Smart City Integration for Parking, partOf, Demand Forecasting>
+<Space Detection, integrates, Navigation to Open Space>
+<Space Detection, partOf, Event Parking Management>
+<Ticketing System Integration, connectedTo, Fleet Parking Solutions>
+<Ticketing System Integration, partOf, Event Parking Management>
+<Vacancy Monitoring, manages, Customer Support>
+<start, connectedTo, Mobile Parking Apps>
diff --git a/test/mermaid/hard/mermaid_275.mmd b/test/mermaid/hard/mermaid_275.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..ce212f7c7b5f4a8a9333cc67ff862127eb233c7e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_275.mmd
@@ -0,0 +1,134 @@
+graph RL
+    N0([On_Street Parking Management])
+    N1{Intelligent Traffic Management Interaction}
+    N2[Demand Forecasting]
+    N3[(Electric Vehicle Charging Integration)]
+    N4[/Edge Computing for Parking Data/]
+    N5(Data Analytics for Parking Usage)
+    N6([Enforcement and Fines Management])
+    N7(Parking Guidance Systems)
+    N8[Billing and Reconciliation]
+    N9[(Space Detection)]
+    N10[Reservations System]
+    N11[Automated Parking Garages]
+    N12[/Mobile Parking Apps/]
+    N13[/Customer Support/]
+    N14[(Valet Parking Automation)]
+    N15([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Ticketing System Integration
+        nest0_0([Real_Time Information Display])
+        nest0_1[[Integration with Navigation Apps]]
+        nest0_2[[Smart Parking Meters]]
+        nest0_3[[Revenue Management]]
+    end
+    subgraph Smart City Integration for Parking
+        nest1_0[[Event Parking Management]]
+        nest1_1{Access Control Systems}
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> |guides| N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> |validates| N12
+    N12 --> N13
+    N13 --> N14
+    N14 -.-> N15
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N9 -.-> nest0_0
+    nest0_3 --> |automates| N2
+    nest1_0 -.-> nest1_1
+    N13 -.-> nest1_0
+    nest1_1 --> N11
+    N0 -.-> S0
+    S0 -.-> N3
+    S0 --> N4
+    S0 --> N11
+    N12 -.-> S1
+    S1 --> N15
+    S1 --> N14
+    N7 -.-> M0
+    N5 --> M0
+    N13 --> M0
+    M0 -.-> N15
+    N0 -.-> M1
+    N2 --> M1
+    N4 -.-> M1
+    M1 -.-> N8
+    style N0 fill:#EDF5F3,stroke:#A1D7CD
+    style N1 fill:#EDF5F3,stroke:#A1D7CD
+    style N2 fill:#F5F5DC,stroke:#BCB88A
+    style N3 fill:#FDFCEB,stroke:#EAEFA5
+    style N4 fill:#F5F5DC,stroke:#BCB88A
+    style N5 fill:#FDFCEB,stroke:#EAEFA5
+    style N6 fill:#F5F5DC,stroke:#BCB88A
+    style N7 fill:#F5F5DC,stroke:#BCB88A
+    style N8 fill:#F5F5DC,stroke:#BCB88A
+    style N9 fill:#F5F5DC,stroke:#BCB88A
+    style N10 fill:#FDFCEB,stroke:#EAEFA5
+    style N11 fill:#EDF5F3,stroke:#A1D7CD
+    style N12 fill:#FDFCEB,stroke:#EAEFA5
+    style N13 fill:#EDF5F3,stroke:#A1D7CD
+    style N14 fill:#EDF5F3,stroke:#A1D7CD
+    style N15 fill:#FDFCEB,stroke:#EAEFA5
+    style S0 fill:#EDF5F3,stroke:#A1D7CD
+    style S1 fill:#F5F5DC,stroke:#BCB88A
+    style M0 fill:#EDF5F3,stroke:#A1D7CD
+    style M1 fill:#F5F5DC,stroke:#BCB88A
+    style nest0_0 fill:#FDFCEB,stroke:#EAEFA5
+    style nest0_1 fill:#EDF5F3,stroke:#A1D7CD
+    style nest0_2 fill:#FDFCEB,stroke:#EAEFA5
+    style nest0_3 fill:#FDFCEB,stroke:#EAEFA5
+    style nest1_0 fill:#F5F5DC,stroke:#BCB88A
+    style nest1_1 fill:#FDFCEB,stroke:#EAEFA5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#EAEFA5,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_275.txt b/test/mermaid/hard/mermaid_275.txt
new file mode 100644
index 0000000000000000000000000000000000000000..2b28786c29ba40ee228b32f6ae1bbcc77f89a53b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_275.txt
@@ -0,0 +1,40 @@
+<Access Control Systems, connectedTo, Automated Parking Garages>
+<Access Control Systems, partOf, Smart City Integration for Parking>
+<Automated Parking Garages, validates, Mobile Parking Apps>
+<Billing and Reconciliation, connectedTo, Space Detection>
+<Customer Support, connectedTo, Event Parking Management>
+<Customer Support, connectedTo, Valet Parking Automation>
+<Customer Support, connectedTo, end>
+<Data Analytics for Parking Usage, connectedTo, Enforcement and Fines Management>
+<Data Analytics for Parking Usage, connectedTo, end>
+<Demand Forecasting, connectedTo, Billing and Reconciliation>
+<Demand Forecasting, connectedTo, Electric Vehicle Charging Integration>
+<Edge Computing for Parking Data, connectedTo, Billing and Reconciliation>
+<Edge Computing for Parking Data, connectedTo, Data Analytics for Parking Usage>
+<Electric Vehicle Charging Integration, guides, Edge Computing for Parking Data>
+<Enforcement and Fines Management, connectedTo, Parking Guidance Systems>
+<Event Parking Management, connectedTo, Access Control Systems>
+<Event Parking Management, partOf, Smart City Integration for Parking>
+<Integration with Navigation Apps, connectedTo, Smart Parking Meters>
+<Integration with Navigation Apps, partOf, Ticketing System Integration>
+<Intelligent Traffic Management Interaction, connectedTo, Demand Forecasting>
+<Mobile Parking Apps, connectedTo, Customer Support>
+<Mobile Parking Apps, connectedTo, Valet Parking Automation>
+<Mobile Parking Apps, connectedTo, end>
+<On_Street Parking Management, connectedTo, Automated Parking Garages>
+<On_Street Parking Management, connectedTo, Billing and Reconciliation>
+<On_Street Parking Management, connectedTo, Edge Computing for Parking Data>
+<On_Street Parking Management, connectedTo, Electric Vehicle Charging Integration>
+<On_Street Parking Management, connectedTo, Intelligent Traffic Management Interaction>
+<Parking Guidance Systems, connectedTo, Billing and Reconciliation>
+<Parking Guidance Systems, connectedTo, end>
+<Real_Time Information Display, connectedTo, Integration with Navigation Apps>
+<Real_Time Information Display, partOf, Ticketing System Integration>
+<Reservations System, connectedTo, Automated Parking Garages>
+<Revenue Management, automates, Demand Forecasting>
+<Revenue Management, partOf, Ticketing System Integration>
+<Smart Parking Meters, connectedTo, Revenue Management>
+<Smart Parking Meters, partOf, Ticketing System Integration>
+<Space Detection, connectedTo, Real_Time Information Display>
+<Space Detection, connectedTo, Reservations System>
+<Valet Parking Automation, connectedTo, end>
diff --git a/test/mermaid/hard/mermaid_276.mmd b/test/mermaid/hard/mermaid_276.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..20460c3e8f2b2e42803344b7af057e376eeeccf1
--- /dev/null
+++ b/test/mermaid/hard/mermaid_276.mmd
@@ -0,0 +1,140 @@
+graph RL
+    N0([Smart City Integration for Parking])
+    N1[(Automated Payment)]
+    N2[Environmental Impact Monitoring]
+    N3{Access Control Systems}
+    N4[Vacancy Monitoring]
+    N5(Parking Guidance Systems)
+    N6[(Mobile Parking Apps)]
+    N7(Data Analytics for Parking Usage)
+    N8[(Edge Computing for Parking Data)]
+    N9([Emergency Vehicle Access Management])
+    N10[/Cloud_based Parking Platforms/]
+    N11[IoT Sensors for Parking]
+    N12([Dynamic Pricing])
+    N13[[Security Surveillance]]
+    N14([Real_Time Information Display])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Fleet Parking Solutions
+        nest0_0{Maintenance of Systems}
+        nest0_1[(Smart Parking Meters)]
+        nest0_2(On_Street Parking Management)
+    end
+    subgraph Navigation to Open Space
+        nest1_0[Revenue Management]
+        nest1_1(User Experience Design for Apps)
+        nest1_2[Event Parking Management]
+        nest1_3[/Customer Support/]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> |controls| N12
+    N12 -.-> N13
+    N13 -.-> N14
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N4 --> nest0_0
+    nest0_2 --> N8
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N11 --> nest1_0
+    nest1_3 -.-> N1
+    N9 --> S0
+    S0 -.-> N13
+    S0 -.-> N12
+    S0 -.-> N11
+    N11 --> S1
+    S1 -.-> N13
+    S1 -.-> |develops| N14
+    N5 --> S2
+    S2 -.-> N14
+    S2 --> N8
+    N3 -.-> M0
+    N2 -.-> M0
+    N4 --> M0
+    M0 --> N6
+    N4 -.-> M1
+    N2 -.-> M1
+    M1 -.-> N7
+    style N0 fill:#C2E8E6,stroke:#61CAC3
+    style N1 fill:#FDFCEB,stroke:#EAEFA5
+    style N2 fill:#FFF6D9,stroke:#FFCC7A
+    style N3 fill:#C2E8E6,stroke:#61CAC3
+    style N4 fill:#C2E8E6,stroke:#61CAC3
+    style N5 fill:#C2E8E6,stroke:#61CAC3
+    style N6 fill:#FFF6D9,stroke:#FFCC7A
+    style N7 fill:#FDFCEB,stroke:#EAEFA5
+    style N8 fill:#C2E8E6,stroke:#61CAC3
+    style N9 fill:#FDFCEB,stroke:#EAEFA5
+    style N10 fill:#FFF6D9,stroke:#FFCC7A
+    style N11 fill:#FFF6D9,stroke:#FFCC7A
+    style N12 fill:#FFF6D9,stroke:#FFCC7A
+    style N13 fill:#FDFCEB,stroke:#EAEFA5
+    style N14 fill:#FFF6D9,stroke:#FFCC7A
+    style S0 fill:#FFF6D9,stroke:#FFCC7A
+    style S1 fill:#FFF6D9,stroke:#FFCC7A
+    style S2 fill:#C2E8E6,stroke:#61CAC3
+    style M0 fill:#FDFCEB,stroke:#EAEFA5
+    style M1 fill:#C2E8E6,stroke:#61CAC3
+    style nest0_0 fill:#FFF6D9,stroke:#FFCC7A
+    style nest0_1 fill:#C2E8E6,stroke:#61CAC3
+    style nest0_2 fill:#FDFCEB,stroke:#EAEFA5
+    style nest1_0 fill:#FFF6D9,stroke:#FFCC7A
+    style nest1_1 fill:#FDFCEB,stroke:#EAEFA5
+    style nest1_2 fill:#FFF6D9,stroke:#FFCC7A
+    style nest1_3 fill:#FFF6D9,stroke:#FFCC7A
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#61CAC3,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_276.txt b/test/mermaid/hard/mermaid_276.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c0a1dab28aa287e65ed95aa1e0261d8337d7d00c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_276.txt
@@ -0,0 +1,42 @@
+<Access Control Systems, connectedTo, Mobile Parking Apps>
+<Access Control Systems, connectedTo, Vacancy Monitoring>
+<Automated Payment, connectedTo, Environmental Impact Monitoring>
+<Cloud_based Parking Platforms, connectedTo, IoT Sensors for Parking>
+<Customer Support, connectedTo, Automated Payment>
+<Customer Support, partOf, Navigation to Open Space>
+<Data Analytics for Parking Usage, connectedTo, Edge Computing for Parking Data>
+<Dynamic Pricing, connectedTo, Security Surveillance>
+<Edge Computing for Parking Data, connectedTo, Emergency Vehicle Access Management>
+<Emergency Vehicle Access Management, connectedTo, Cloud_based Parking Platforms>
+<Emergency Vehicle Access Management, connectedTo, Dynamic Pricing>
+<Emergency Vehicle Access Management, connectedTo, IoT Sensors for Parking>
+<Emergency Vehicle Access Management, connectedTo, Security Surveillance>
+<Environmental Impact Monitoring, connectedTo, Access Control Systems>
+<Environmental Impact Monitoring, connectedTo, Data Analytics for Parking Usage>
+<Environmental Impact Monitoring, connectedTo, Mobile Parking Apps>
+<Event Parking Management, connectedTo, Customer Support>
+<Event Parking Management, partOf, Navigation to Open Space>
+<IoT Sensors for Parking, connectedTo, Revenue Management>
+<IoT Sensors for Parking, connectedTo, Security Surveillance>
+<IoT Sensors for Parking, controls, Dynamic Pricing>
+<IoT Sensors for Parking, develops, Real_Time Information Display>
+<Maintenance of Systems, connectedTo, Smart Parking Meters>
+<Maintenance of Systems, partOf, Fleet Parking Solutions>
+<Mobile Parking Apps, connectedTo, Data Analytics for Parking Usage>
+<On_Street Parking Management, connectedTo, Edge Computing for Parking Data>
+<On_Street Parking Management, partOf, Fleet Parking Solutions>
+<Parking Guidance Systems, connectedTo, Edge Computing for Parking Data>
+<Parking Guidance Systems, connectedTo, Mobile Parking Apps>
+<Parking Guidance Systems, connectedTo, Real_Time Information Display>
+<Revenue Management, connectedTo, User Experience Design for Apps>
+<Revenue Management, partOf, Navigation to Open Space>
+<Security Surveillance, connectedTo, Real_Time Information Display>
+<Smart City Integration for Parking, connectedTo, Automated Payment>
+<Smart Parking Meters, connectedTo, On_Street Parking Management>
+<Smart Parking Meters, partOf, Fleet Parking Solutions>
+<User Experience Design for Apps, connectedTo, Event Parking Management>
+<User Experience Design for Apps, partOf, Navigation to Open Space>
+<Vacancy Monitoring, connectedTo, Data Analytics for Parking Usage>
+<Vacancy Monitoring, connectedTo, Maintenance of Systems>
+<Vacancy Monitoring, connectedTo, Mobile Parking Apps>
+<Vacancy Monitoring, connectedTo, Parking Guidance Systems>
diff --git a/test/mermaid/hard/mermaid_277.mmd b/test/mermaid/hard/mermaid_277.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..62764351f8a61858a9d51761924370345c34329a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_277.mmd
@@ -0,0 +1,158 @@
+graph RL
+    N0([start])
+    N1{Refund Management}
+    N2[Mobile Ticketing]
+    N3(Personalized Ticket Offers)
+    N4(Festival Ticketing)
+    N5[(Museum Ticketing)]
+    N6[Biometric Ticketing]
+    N7[[Theme Park Ticketing]]
+    N8([Subscription or Season Pass Management])
+    N9([Pricing Configuration])
+    N10[[Seat Mapping]]
+    N11([Public Transport Ticketing])
+    N12[/Ticket Sales/]
+    N13[Access Control]
+    N14([Post_Event Feedback Collection])
+    N15[Audience Segmentation]
+    N16(Fan Loyalty Programs)
+    N17[[Queue Management]]
+    N18([Venue Capacity Management])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Theater Ticketing
+        nest0_0[[Scalper Prevention]]
+        nest0_1{Analytics on Sales Data}
+    end
+    subgraph Waiting List Management
+        nest1_0[Blockchain Ticketing for Authenticity]
+        nest1_1([Dynamic Pricing])
+        nest1_2[[Event Creation]]
+        nest1_3(Group Booking Management)
+    end
+    N0 --> |publishes| N1
+    N1 -.-> |markets| N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    N15 --> |reserves| N16
+    N16 -.-> N17
+    N17 --> N18
+    nest0_0 --> nest0_1
+    N4 --> nest0_0
+    nest0_1 --> N4
+    nest1_0 -.-> |advertises| nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 -.-> nest1_3
+    N4 --> nest1_0
+    nest1_3 -.-> |upgrades| N11
+    N6 --> S0
+    S0 --> N14
+    S0 --> N16
+    S0 --> N11
+    N11 -.-> S1
+    S1 --> N18
+    S1 -.-> N13
+    S1 -.-> |cancels| N16
+    S1 -.-> N17
+    N14 -.-> S2
+    S2 -.-> N16
+    S2 -.-> |creates| N18
+    N3 --> M0
+    N2 --> M0
+    M0 --> N5
+    N2 -.-> M1
+    N3 --> |redeems| M1
+    N6 --> M1
+    N4 -.-> |secures| M1
+    M1 --> N8
+    style N0 fill:#D3D7EB,stroke:#8C9EFF
+    style N1 fill:#FFF3E0,stroke:#FFB74D
+    style N2 fill:#FFF3E0,stroke:#FFB74D
+    style N3 fill:#FFF3E0,stroke:#FFB74D
+    style N4 fill:#FFF3E0,stroke:#FFB74D
+    style N5 fill:#FFF3E0,stroke:#FFB74D
+    style N6 fill:#FFFDE0,stroke:#FFF8A6
+    style N7 fill:#FFFDE0,stroke:#FFF8A6
+    style N8 fill:#FFFDE0,stroke:#FFF8A6
+    style N9 fill:#FFF3E0,stroke:#FFB74D
+    style N10 fill:#FFFDE0,stroke:#FFF8A6
+    style N11 fill:#FFFDE0,stroke:#FFF8A6
+    style N12 fill:#FFF3E0,stroke:#FFB74D
+    style N13 fill:#D3D7EB,stroke:#8C9EFF
+    style N14 fill:#FFF3E0,stroke:#FFB74D
+    style N15 fill:#FFF3E0,stroke:#FFB74D
+    style N16 fill:#FFFDE0,stroke:#FFF8A6
+    style N17 fill:#D3D7EB,stroke:#8C9EFF
+    style N18 fill:#D3D7EB,stroke:#8C9EFF
+    style S0 fill:#FFF3E0,stroke:#FFB74D
+    style S1 fill:#D3D7EB,stroke:#8C9EFF
+    style S2 fill:#FFFDE0,stroke:#FFF8A6
+    style M0 fill:#FFF3E0,stroke:#FFB74D
+    style M1 fill:#FFF3E0,stroke:#FFB74D
+    style nest0_0 fill:#FFF3E0,stroke:#FFB74D
+    style nest0_1 fill:#D3D7EB,stroke:#8C9EFF
+    style nest1_0 fill:#FFFDE0,stroke:#FFF8A6
+    style nest1_1 fill:#FFFDE0,stroke:#FFF8A6
+    style nest1_2 fill:#FFF3E0,stroke:#FFB74D
+    style nest1_3 fill:#FFF3E0,stroke:#FFB74D
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#8C9EFF,stroke-width:2px,fill:none;
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+    linkStyle 18 stroke:#FFF8A6,stroke-width:2px,fill:none;
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+    linkStyle 21 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 44 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 45 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_277.txt b/test/mermaid/hard/mermaid_277.txt
new file mode 100644
index 0000000000000000000000000000000000000000..edd97bddcc4797f6c7c56ec8a4c64a469128472a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_277.txt
@@ -0,0 +1,47 @@
+<Access Control, connectedTo, Post_Event Feedback Collection>
+<Analytics on Sales Data, connectedTo, Festival Ticketing>
+<Analytics on Sales Data, partOf, Theater Ticketing>
+<Audience Segmentation, reserves, Fan Loyalty Programs>
+<Biometric Ticketing, connectedTo, Fan Loyalty Programs>
+<Biometric Ticketing, connectedTo, Post_Event Feedback Collection>
+<Biometric Ticketing, connectedTo, Public Transport Ticketing>
+<Biometric Ticketing, connectedTo, Subscription or Season Pass Management>
+<Biometric Ticketing, connectedTo, Theme Park Ticketing>
+<Blockchain Ticketing for Authenticity, advertises, Dynamic Pricing>
+<Blockchain Ticketing for Authenticity, partOf, Waiting List Management>
+<Dynamic Pricing, connectedTo, Event Creation>
+<Dynamic Pricing, partOf, Waiting List Management>
+<Event Creation, connectedTo, Group Booking Management>
+<Event Creation, partOf, Waiting List Management>
+<Fan Loyalty Programs, connectedTo, Queue Management>
+<Festival Ticketing, connectedTo, Blockchain Ticketing for Authenticity>
+<Festival Ticketing, connectedTo, Museum Ticketing>
+<Festival Ticketing, connectedTo, Scalper Prevention>
+<Festival Ticketing, secures, Subscription or Season Pass Management>
+<Group Booking Management, partOf, Waiting List Management>
+<Group Booking Management, upgrades, Public Transport Ticketing>
+<Mobile Ticketing, connectedTo, Museum Ticketing>
+<Mobile Ticketing, connectedTo, Personalized Ticket Offers>
+<Mobile Ticketing, connectedTo, Subscription or Season Pass Management>
+<Museum Ticketing, connectedTo, Biometric Ticketing>
+<Personalized Ticket Offers, connectedTo, Festival Ticketing>
+<Personalized Ticket Offers, connectedTo, Museum Ticketing>
+<Personalized Ticket Offers, redeems, Subscription or Season Pass Management>
+<Post_Event Feedback Collection, connectedTo, Audience Segmentation>
+<Post_Event Feedback Collection, connectedTo, Fan Loyalty Programs>
+<Post_Event Feedback Collection, creates, Venue Capacity Management>
+<Pricing Configuration, connectedTo, Seat Mapping>
+<Public Transport Ticketing, cancels, Fan Loyalty Programs>
+<Public Transport Ticketing, connectedTo, Access Control>
+<Public Transport Ticketing, connectedTo, Queue Management>
+<Public Transport Ticketing, connectedTo, Ticket Sales>
+<Public Transport Ticketing, connectedTo, Venue Capacity Management>
+<Queue Management, connectedTo, Venue Capacity Management>
+<Refund Management, markets, Mobile Ticketing>
+<Scalper Prevention, connectedTo, Analytics on Sales Data>
+<Scalper Prevention, partOf, Theater Ticketing>
+<Seat Mapping, connectedTo, Public Transport Ticketing>
+<Subscription or Season Pass Management, connectedTo, Pricing Configuration>
+<Theme Park Ticketing, connectedTo, Subscription or Season Pass Management>
+<Ticket Sales, connectedTo, Access Control>
+<start, publishes, Refund Management>
diff --git a/test/mermaid/hard/mermaid_278.mmd b/test/mermaid/hard/mermaid_278.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..fba3a028c9d3109d29ff13f401afc88982bc9fd6
--- /dev/null
+++ b/test/mermaid/hard/mermaid_278.mmd
@@ -0,0 +1,128 @@
+graph TD
+    N0([Theater Ticketing])
+    N1[[Blockchain Ticketing for Authenticity]]
+    N2{Box Office Management}
+    N3(Festival Ticketing)
+    N4(Event Promotion Tools)
+    N5[[Airline Ticketing]]
+    N6[(Public Transport Ticketing)]
+    N7[Payment Processing]
+    N8[[Group Booking Management]]
+    N9[/Waiting List Management/]
+    N10(Sports Event Ticketing)
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Resale Market Integration
+        nest0_0[(Post_Event Feedback Collection)]
+        nest0_1[/Biometric Ticketing/]
+        nest0_2(Concert Ticketing)
+        nest0_3([Theme Park Ticketing])
+    end
+    subgraph Audience Segmentation
+        nest1_0(Agent Network Management)
+        nest1_1(Subscription or Season Pass Management)
+        nest1_2([Seat Mapping])
+        nest1_3[/Pricing Configuration/]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N8 --> nest0_0
+    nest0_3 -.-> N8
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 -.-> nest1_3
+    N3 -.-> nest1_0
+    nest1_3 -.-> N3
+    N5 -.-> S0
+    S0 --> N10
+    S0 --> N8
+    S0 -.-> |publishes| N7
+    N7 -.-> S1
+    S1 -.-> N10
+    S1 -.-> N9
+    N7 --> M0
+    N5 -.-> M0
+    M0 --> N9
+    N2 --> M1
+    N0 --> M1
+    M1 --> N9
+    N3 -.-> M2
+    N1 --> |cancels| M2
+    N0 -.-> M2
+    M2 -.-> N5
+    style N0 fill:#F1F8FF,stroke:#42A5F5
+    style N1 fill:#D6D9F0,stroke:#9FA9E1
+    style N2 fill:#E0F7FA,stroke:#00BCD4
+    style N3 fill:#F1F8FF,stroke:#42A5F5
+    style N4 fill:#E0F7FA,stroke:#00BCD4
+    style N5 fill:#F1F8FF,stroke:#42A5F5
+    style N6 fill:#F1F8FF,stroke:#42A5F5
+    style N7 fill:#D6D9F0,stroke:#9FA9E1
+    style N8 fill:#D6D9F0,stroke:#9FA9E1
+    style N9 fill:#D6D9F0,stroke:#9FA9E1
+    style N10 fill:#E0F7FA,stroke:#00BCD4
+    style S0 fill:#E0F7FA,stroke:#00BCD4
+    style S1 fill:#D6D9F0,stroke:#9FA9E1
+    style M0 fill:#E0F7FA,stroke:#00BCD4
+    style M1 fill:#E0F7FA,stroke:#00BCD4
+    style M2 fill:#F1F8FF,stroke:#42A5F5
+    style nest0_0 fill:#F1F8FF,stroke:#42A5F5
+    style nest0_1 fill:#E0F7FA,stroke:#00BCD4
+    style nest0_2 fill:#D6D9F0,stroke:#9FA9E1
+    style nest0_3 fill:#F1F8FF,stroke:#42A5F5
+    style nest1_0 fill:#F1F8FF,stroke:#42A5F5
+    style nest1_1 fill:#D6D9F0,stroke:#9FA9E1
+    style nest1_2 fill:#E0F7FA,stroke:#00BCD4
+    style nest1_3 fill:#F1F8FF,stroke:#42A5F5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#9FA9E1,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_278.txt b/test/mermaid/hard/mermaid_278.txt
new file mode 100644
index 0000000000000000000000000000000000000000..4df5bcabaf7bacd960f216571408a50e9e488401
--- /dev/null
+++ b/test/mermaid/hard/mermaid_278.txt
@@ -0,0 +1,39 @@
+<Agent Network Management, connectedTo, Subscription or Season Pass Management>
+<Agent Network Management, partOf, Audience Segmentation>
+<Airline Ticketing, connectedTo, Group Booking Management>
+<Airline Ticketing, connectedTo, Public Transport Ticketing>
+<Airline Ticketing, connectedTo, Sports Event Ticketing>
+<Airline Ticketing, connectedTo, Waiting List Management>
+<Airline Ticketing, publishes, Payment Processing>
+<Biometric Ticketing, connectedTo, Concert Ticketing>
+<Biometric Ticketing, partOf, Resale Market Integration>
+<Blockchain Ticketing for Authenticity, cancels, Airline Ticketing>
+<Blockchain Ticketing for Authenticity, connectedTo, Box Office Management>
+<Box Office Management, connectedTo, Festival Ticketing>
+<Box Office Management, connectedTo, Waiting List Management>
+<Concert Ticketing, connectedTo, Theme Park Ticketing>
+<Concert Ticketing, partOf, Resale Market Integration>
+<Event Promotion Tools, connectedTo, Airline Ticketing>
+<Festival Ticketing, connectedTo, Agent Network Management>
+<Festival Ticketing, connectedTo, Airline Ticketing>
+<Festival Ticketing, connectedTo, Event Promotion Tools>
+<Group Booking Management, connectedTo, Post_Event Feedback Collection>
+<Group Booking Management, connectedTo, Waiting List Management>
+<Payment Processing, connectedTo, Group Booking Management>
+<Payment Processing, connectedTo, Sports Event Ticketing>
+<Payment Processing, connectedTo, Waiting List Management>
+<Post_Event Feedback Collection, connectedTo, Biometric Ticketing>
+<Post_Event Feedback Collection, partOf, Resale Market Integration>
+<Pricing Configuration, connectedTo, Festival Ticketing>
+<Pricing Configuration, partOf, Audience Segmentation>
+<Public Transport Ticketing, connectedTo, Payment Processing>
+<Seat Mapping, connectedTo, Pricing Configuration>
+<Seat Mapping, partOf, Audience Segmentation>
+<Subscription or Season Pass Management, connectedTo, Seat Mapping>
+<Subscription or Season Pass Management, partOf, Audience Segmentation>
+<Theater Ticketing, connectedTo, Airline Ticketing>
+<Theater Ticketing, connectedTo, Blockchain Ticketing for Authenticity>
+<Theater Ticketing, connectedTo, Waiting List Management>
+<Theme Park Ticketing, connectedTo, Group Booking Management>
+<Theme Park Ticketing, partOf, Resale Market Integration>
+<Waiting List Management, connectedTo, Sports Event Ticketing>
diff --git a/test/mermaid/hard/mermaid_279.mmd b/test/mermaid/hard/mermaid_279.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..fb482e6a62aa8783940418800cb5fe027b52da91
--- /dev/null
+++ b/test/mermaid/hard/mermaid_279.mmd
@@ -0,0 +1,96 @@
+graph RL
+    N0([start])
+    N1[[Customer Relationship Management Integration]]
+    N2(API Integration for Partners)
+    N3{Blockchain Ticketing for Authenticity}
+    N4{Seat Mapping}
+    N5[/Mobile Ticketing/]
+    N6[[Waiting List Management]]
+    N7[[Concert Ticketing]]
+    N8[Festival Ticketing]
+    N9[/Fan Loyalty Programs/]
+    S1(( ))
+    M2(( ))
+    subgraph Post_Event Feedback Collection
+        nest0_0[Theme Park Ticketing]
+        nest0_1[/Order Confirmation/]
+        nest0_2[Biometric Ticketing]
+    end
+    subgraph Agent Network Management
+        nest1_0{Sports Event Ticketing}
+        nest1_1[Promotional Code Management]
+        nest1_2{Airline Ticketing}
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> |maintains| N8
+    N8 -.-> |creates| N9
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N5 -.-> |refunds| nest0_0
+    nest0_2 -.-> N9
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N5 -.-> nest1_0
+    nest1_2 -.-> N3
+    N1 --> S1
+    S1 --> N7
+    S1 --> N6
+    S1 -.-> N5
+    S1 -.-> N4
+    N1 -.-> |reserves| M2
+    N0 --> M2
+    M2 -.-> N3
+    N0 --> N2
+    N4 -.-> N9
+    style N0 fill:#E1BEE7,stroke:#9C27B0
+    style N1 fill:#F3E5F5,stroke:#AB47BC
+    style N2 fill:#E1BEE7,stroke:#9C27B0
+    style N3 fill:#F5F5DC,stroke:#BCB88A
+    style N4 fill:#F3E5F5,stroke:#AB47BC
+    style N5 fill:#F3E5F5,stroke:#AB47BC
+    style N6 fill:#F5F5DC,stroke:#BCB88A
+    style N7 fill:#F5F5DC,stroke:#BCB88A
+    style N8 fill:#E1BEE7,stroke:#9C27B0
+    style N9 fill:#F5F5DC,stroke:#BCB88A
+    style S1 fill:#E1BEE7,stroke:#9C27B0
+    style M2 fill:#F3E5F5,stroke:#AB47BC
+    style nest0_0 fill:#E1BEE7,stroke:#9C27B0
+    style nest0_1 fill:#F3E5F5,stroke:#AB47BC
+    style nest0_2 fill:#F5F5DC,stroke:#BCB88A
+    style nest1_0 fill:#F3E5F5,stroke:#AB47BC
+    style nest1_1 fill:#F3E5F5,stroke:#AB47BC
+    style nest1_2 fill:#F5F5DC,stroke:#BCB88A
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#9C27B0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_28.mmd b/test/mermaid/hard/mermaid_28.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..16a568536e0437332d596c57c94bcc8e3ca5c5e0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_28.mmd
@@ -0,0 +1,111 @@
+graph TD
+    N0([start])
+    N1[[Antenna Maintenance]]
+    N2[(Data Usage Logging)]
+    N3[(Bill Generation)]
+    N4(Payment Received)
+    N5[Billing Inquiry]
+    N6[/Usage Monitoring/]
+    N7[Service Activation Request]
+    N8(Mobile Top_up)
+    N9[[Service Complaint]]
+    N10([Number Porting])
+    N11[(Customer Relationship Management)]
+    N12[/VoIP Service/]
+    N13([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Bandwidth Allocation
+        nest0_0[Call Recording]
+        nest0_1(SMS Delivery)
+        nest0_2[/Broadband Provisioning/]
+        nest0_3[Network Upgrade]
+    end
+    subgraph Customer Support
+        nest1_0(SIM Registration)
+        nest1_1{Contract Termination}
+        nest1_2{Plan Renewal}
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 -.-> |yes| N11
+    N11 --> N12
+    N12 -.-> N13
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N7 --> nest0_0
+    nest0_3 -.-> N9
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N5 --> nest1_0
+    nest1_2 -.-> N7
+    N0 --> S0
+    S0 --> N2
+    S0 --> N7
+    S0 -.-> N5
+    N2 -.-> S1
+    S1 -.-> N11
+    S1 --> N12
+    N3 --> M0
+    N2 -.-> M0
+    N1 -.-> M0
+    N0 --> M0
+    M0 -.-> N5
+    N0 -.-> M1
+    N2 -.-> M1
+    N1 -.-> M1
+    M1 -.-> N5
+    style S0 fill:#B3E5FC,stroke:#03A9F4
+    style S1 fill:#F1F8E9,stroke:#81C784
+    style M0 fill:#B3E5FC,stroke:#03A9F4
+    style M1 fill:#B3E5FC,stroke:#03A9F4
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
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+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
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+    linkStyle 24 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#5C6BC0,stroke-width:2px,fill:none;
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+    linkStyle 28 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#03A9F4,stroke-width:2px,fill:none;
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+    linkStyle 36 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#81C784,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_280.mmd b/test/mermaid/hard/mermaid_280.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..2f9d5232ddf849ac7a449c3fa9d0e2676563796d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_280.mmd
@@ -0,0 +1,122 @@
+graph LR
+    N0([Anonymous Credential Systems])
+    N1{Vote Counting}
+    N2[[Optical Scan Systems]]
+    N3[(Public Trust Building)]
+    N4([Biometric Voter ID])
+    N5([Undue Influence Prevention])
+    N6[/Voter Authentication/]
+    N7[(Auditability)]
+    N8[(Online Voting Systems)]
+    N9[Secure Data Transmission]
+    N10[[Transparency]]
+    N11[[Election Official Training]]
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Legal Framework Compliance
+        nest0_0{Voter Education Programs}
+        nest0_1[Touchscreen Voting Machines]
+        nest0_2{Risk Management for Elections}
+        nest0_3(Accessibility Features)
+    end
+    subgraph Zero_Knowledge Proofs for Privacy
+        nest1_0[(Post_Election Audits)]
+        nest1_1[[Voter Privacy Protection]]
+        nest1_2(Security Protocols)
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> |receives| N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    nest0_0 --> |detects| nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> |prevents| nest0_3
+    N9 --> nest0_0
+    nest0_3 --> N10
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N6 -.-> nest1_0
+    nest1_2 -.-> N5
+    N3 -.-> S2
+    S2 --> N10
+    S2 -.-> N8
+    S2 --> N5
+    S2 -.-> |maintains| N6
+    N2 --> M0
+    N7 --> M0
+    N4 -.-> M0
+    M0 --> N9
+    N0 --> M1
+    N1 -.-> M1
+    M1 --> N3
+    N5 -.-> |develops| M2
+    N1 --> |recovers| M2
+    M2 -.-> N9
+    style N0 fill:#B2EBF2,stroke:#00BCD4
+    style N1 fill:#B2EBF2,stroke:#00BCD4
+    style N2 fill:#F0F4C3,stroke:#AED581
+    style N3 fill:#B2EBF2,stroke:#00BCD4
+    style N4 fill:#F0F4C3,stroke:#AED581
+    style N5 fill:#F0F4C3,stroke:#AED581
+    style N6 fill:#F0F4C3,stroke:#AED581
+    style N7 fill:#FDFCEB,stroke:#EAEFA5
+    style N8 fill:#B2EBF2,stroke:#00BCD4
+    style N9 fill:#FDFCEB,stroke:#EAEFA5
+    style N10 fill:#FDFCEB,stroke:#EAEFA5
+    style N11 fill:#B2EBF2,stroke:#00BCD4
+    style S2 fill:#FDFCEB,stroke:#EAEFA5
+    style M0 fill:#FDFCEB,stroke:#EAEFA5
+    style M1 fill:#F0F4C3,stroke:#AED581
+    style M2 fill:#F0F4C3,stroke:#AED581
+    style nest0_0 fill:#FDFCEB,stroke:#EAEFA5
+    style nest0_1 fill:#F0F4C3,stroke:#AED581
+    style nest0_2 fill:#F0F4C3,stroke:#AED581
+    style nest0_3 fill:#F0F4C3,stroke:#AED581
+    style nest1_0 fill:#B2EBF2,stroke:#00BCD4
+    style nest1_1 fill:#FDFCEB,stroke:#EAEFA5
+    style nest1_2 fill:#B2EBF2,stroke:#00BCD4
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#00BCD4,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_280.txt b/test/mermaid/hard/mermaid_280.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ead9ad841caddec921cdbd93f740b5ac568afa05
--- /dev/null
+++ b/test/mermaid/hard/mermaid_280.txt
@@ -0,0 +1,38 @@
+<Accessibility Features, connectedTo, Transparency>
+<Accessibility Features, partOf, Legal Framework Compliance>
+<Anonymous Credential Systems, connectedTo, Public Trust Building>
+<Anonymous Credential Systems, connectedTo, Vote Counting>
+<Auditability, connectedTo, Online Voting Systems>
+<Auditability, connectedTo, Secure Data Transmission>
+<Biometric Voter ID, connectedTo, Secure Data Transmission>
+<Biometric Voter ID, connectedTo, Undue Influence Prevention>
+<Online Voting Systems, connectedTo, Secure Data Transmission>
+<Optical Scan Systems, connectedTo, Public Trust Building>
+<Optical Scan Systems, connectedTo, Secure Data Transmission>
+<Post_Election Audits, connectedTo, Voter Privacy Protection>
+<Post_Election Audits, partOf, Zero_Knowledge Proofs for Privacy>
+<Public Trust Building, connectedTo, Biometric Voter ID>
+<Public Trust Building, connectedTo, Online Voting Systems>
+<Public Trust Building, connectedTo, Transparency>
+<Public Trust Building, connectedTo, Undue Influence Prevention>
+<Public Trust Building, maintains, Voter Authentication>
+<Risk Management for Elections, partOf, Legal Framework Compliance>
+<Risk Management for Elections, prevents, Accessibility Features>
+<Secure Data Transmission, connectedTo, Transparency>
+<Secure Data Transmission, connectedTo, Voter Education Programs>
+<Security Protocols, connectedTo, Undue Influence Prevention>
+<Security Protocols, partOf, Zero_Knowledge Proofs for Privacy>
+<Touchscreen Voting Machines, connectedTo, Risk Management for Elections>
+<Touchscreen Voting Machines, partOf, Legal Framework Compliance>
+<Transparency, connectedTo, Election Official Training>
+<Undue Influence Prevention, connectedTo, Voter Authentication>
+<Undue Influence Prevention, develops, Secure Data Transmission>
+<Vote Counting, connectedTo, Optical Scan Systems>
+<Vote Counting, connectedTo, Public Trust Building>
+<Vote Counting, recovers, Secure Data Transmission>
+<Voter Authentication, connectedTo, Post_Election Audits>
+<Voter Authentication, receives, Auditability>
+<Voter Education Programs, detects, Touchscreen Voting Machines>
+<Voter Education Programs, partOf, Legal Framework Compliance>
+<Voter Privacy Protection, connectedTo, Security Protocols>
+<Voter Privacy Protection, partOf, Zero_Knowledge Proofs for Privacy>
diff --git a/test/mermaid/hard/mermaid_281.txt b/test/mermaid/hard/mermaid_281.txt
new file mode 100644
index 0000000000000000000000000000000000000000..045e413a5f2c41462db28abc3125e43fd45f8b23
--- /dev/null
+++ b/test/mermaid/hard/mermaid_281.txt
@@ -0,0 +1,39 @@
+<Accessibility Features, connectedTo, Cryptographic Security>
+<Anonymous Credential Systems, connectedTo, Risk Management for Elections>
+<Ballot Creation, connectedTo, Accessibility Features>
+<Ballot Creation, connectedTo, Direct Recording Electronic Systems>
+<Ballot Creation, connectedTo, Risk Management for Elections>
+<Cryptographic Security, connectedTo, Secure Data Transmission>
+<Cybersecurity for Voting Systems, connectedTo, Penetration Testing>
+<Cybersecurity for Voting Systems, connectedTo, Undue Influence Prevention>
+<Direct Recording Electronic Systems, connectedTo, Transparency>
+<Direct Recording Electronic Systems, connectedTo, end>
+<Direct Recording Electronic Systems, no, Threat Modeling>
+<Hardware Tamper Detection, connectedTo, Voter Education Programs>
+<Legal Framework Compliance, connectedTo, Ballot Creation>
+<Legal Framework Compliance, connectedTo, Cryptographic Security>
+<Legal Framework Compliance, connectedTo, Cybersecurity for Voting Systems>
+<Legal Framework Compliance, connectedTo, Public Trust Building>
+<Online Voting Systems, connectedTo, Zero_Knowledge Proofs for Privacy>
+<Penetration Testing, connectedTo, Online Voting Systems>
+<Public Trust Building, connectedTo, Cybersecurity for Voting Systems>
+<Remote Voting Solutions, connectedTo, Hardware Tamper Detection>
+<Remote Voting Solutions, connectedTo, Results Aggregation>
+<Remote Voting Solutions, connectedTo, end>
+<Results Aggregation, connectedTo, end>
+<Results Aggregation, partOf, Election Official Training>
+<Risk Management for Elections, connectedTo, end>
+<Secure Data Transmission, connectedTo, Direct Recording Electronic Systems>
+<Software Integrity Checks, connectedTo, Voter Education Programs>
+<Software Integrity Checks, partOf, Blockchain for Voting>
+<Threat Modeling, connectedTo, Anonymous Credential Systems>
+<Transparency, connectedTo, Results Aggregation>
+<Transparency, partOf, Election Official Training>
+<Undue Influence Prevention, connectedTo, Voter Authentication>
+<Undue Influence Prevention, partOf, Blockchain for Voting>
+<Voter Authentication, connectedTo, Software Integrity Checks>
+<Voter Authentication, partOf, Blockchain for Voting>
+<Voter Education Programs, connectedTo, Ballot Creation>
+<Voting Machine Design, connectedTo, Remote Voting Solutions>
+<Zero_Knowledge Proofs for Privacy, connectedTo, Voting Machine Design>
+<start, connectedTo, Legal Framework Compliance>
diff --git a/test/mermaid/hard/mermaid_282.mmd b/test/mermaid/hard/mermaid_282.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..2788e0f525df0fd39a9c4487bc5378127e6b4a54
--- /dev/null
+++ b/test/mermaid/hard/mermaid_282.mmd
@@ -0,0 +1,108 @@
+graph LR
+    N0([start])
+    N1[/Vote Counting/]
+    N2[Risk Management for Elections]
+    N3{Voter Education Programs}
+    N4{Optical Scan Systems}
+    N5(Voting Machine Design)
+    N6{Remote Voting Solutions}
+    N7[Biometric Voter ID]
+    N8{Hardware Tamper Detection}
+    N9(Blockchain for Voting)
+    N10[[Security Protocols]]
+    S1(( ))
+    M1(( ))
+    subgraph Secure Data Transmission
+        nest0_0[(Touchscreen Voting Machines)]
+        nest0_1{Cryptographic Security}
+        nest0_2[/Results Aggregation/]
+        nest0_3[[Accessibility Features]]
+    end
+    subgraph Public Trust Building
+        nest1_0[Auditability]
+        nest1_1{Voter Authentication}
+        nest1_2(Penetration Testing)
+        nest1_3(Undue Influence Prevention)
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> |registers| N3
+    N3 -.-> N4
+    N4 --> |authenticates| N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> |transmits| N9
+    N9 --> N10
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N1 -.-> nest0_0
+    nest0_3 --> |educates| N1
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N3 --> nest1_0
+    nest1_3 -.-> N4
+    N2 --> S1
+    S1 -.-> N8
+    S1 --> N4
+    S1 -.-> |regulates| N9
+    S1 --> N5
+    N3 -.-> M1
+    N1 -.-> |encrypts| M1
+    N2 -.-> M1
+    N0 -.-> M1
+    M1 -.-> N5
+    style N0 fill:#FFE0B2,stroke:#FF9800
+    style N1 fill:#FFF6D9,stroke:#FFCC7A
+    style N2 fill:#FFE0B2,stroke:#FF9800
+    style N3 fill:#EBEBEB,stroke:#E0E0E0
+    style N4 fill:#FFF6D9,stroke:#FFCC7A
+    style N5 fill:#FFF6D9,stroke:#FFCC7A
+    style N6 fill:#EBEBEB,stroke:#E0E0E0
+    style N7 fill:#FFF6D9,stroke:#FFCC7A
+    style N8 fill:#FFE0B2,stroke:#FF9800
+    style N9 fill:#FFF6D9,stroke:#FFCC7A
+    style N10 fill:#EBEBEB,stroke:#E0E0E0
+    style S1 fill:#FFF6D9,stroke:#FFCC7A
+    style M1 fill:#FFF6D9,stroke:#FFCC7A
+    style nest0_0 fill:#FFF6D9,stroke:#FFCC7A
+    style nest0_1 fill:#EBEBEB,stroke:#E0E0E0
+    style nest0_2 fill:#FFE0B2,stroke:#FF9800
+    style nest0_3 fill:#FFF6D9,stroke:#FFCC7A
+    style nest1_0 fill:#FFF6D9,stroke:#FFCC7A
+    style nest1_1 fill:#FFE0B2,stroke:#FF9800
+    style nest1_2 fill:#FFE0B2,stroke:#FF9800
+    style nest1_3 fill:#EBEBEB,stroke:#E0E0E0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_282.txt b/test/mermaid/hard/mermaid_282.txt
new file mode 100644
index 0000000000000000000000000000000000000000..eeee552330e2c42044c3eba3312e077b91b37a23
--- /dev/null
+++ b/test/mermaid/hard/mermaid_282.txt
@@ -0,0 +1,35 @@
+<Accessibility Features, educates, Vote Counting>
+<Accessibility Features, partOf, Secure Data Transmission>
+<Auditability, connectedTo, Voter Authentication>
+<Auditability, partOf, Public Trust Building>
+<Biometric Voter ID, connectedTo, Hardware Tamper Detection>
+<Blockchain for Voting, connectedTo, Security Protocols>
+<Cryptographic Security, connectedTo, Results Aggregation>
+<Cryptographic Security, partOf, Secure Data Transmission>
+<Hardware Tamper Detection, transmits, Blockchain for Voting>
+<Optical Scan Systems, authenticates, Voting Machine Design>
+<Penetration Testing, connectedTo, Undue Influence Prevention>
+<Penetration Testing, partOf, Public Trust Building>
+<Remote Voting Solutions, connectedTo, Biometric Voter ID>
+<Results Aggregation, connectedTo, Accessibility Features>
+<Results Aggregation, partOf, Secure Data Transmission>
+<Risk Management for Elections, connectedTo, Hardware Tamper Detection>
+<Risk Management for Elections, connectedTo, Optical Scan Systems>
+<Risk Management for Elections, connectedTo, Voting Machine Design>
+<Risk Management for Elections, registers, Voter Education Programs>
+<Risk Management for Elections, regulates, Blockchain for Voting>
+<Touchscreen Voting Machines, connectedTo, Cryptographic Security>
+<Touchscreen Voting Machines, partOf, Secure Data Transmission>
+<Undue Influence Prevention, connectedTo, Optical Scan Systems>
+<Undue Influence Prevention, partOf, Public Trust Building>
+<Vote Counting, connectedTo, Risk Management for Elections>
+<Vote Counting, connectedTo, Touchscreen Voting Machines>
+<Vote Counting, encrypts, Voting Machine Design>
+<Voter Authentication, connectedTo, Penetration Testing>
+<Voter Authentication, partOf, Public Trust Building>
+<Voter Education Programs, connectedTo, Auditability>
+<Voter Education Programs, connectedTo, Optical Scan Systems>
+<Voter Education Programs, connectedTo, Voting Machine Design>
+<Voting Machine Design, connectedTo, Remote Voting Solutions>
+<start, connectedTo, Vote Counting>
+<start, connectedTo, Voting Machine Design>
diff --git a/test/mermaid/hard/mermaid_283.mmd b/test/mermaid/hard/mermaid_283.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..691964fc2da75195ee0bcef67434f55702f49e75
--- /dev/null
+++ b/test/mermaid/hard/mermaid_283.mmd
@@ -0,0 +1,158 @@
+graph RL
+    N0([International Policy Analysis])
+    N1([Communication Strategy])
+    N2[(Ethical Considerations)]
+    N3[/Data Visualization for Policy/]
+    N4[[Risk Assessment]]
+    N5[[Stakeholder Analysis]]
+    N6(Presentation Skills)
+    N7([Budgetary Implications])
+    N8[Policy Simulation Models]
+    N9[[Monitoring and Evaluation Framework]]
+    N10[Impact Assessment]
+    N11[/Regulatory Impact Assessment/]
+    N12(Program Design)
+    N13(Recommendation Formulation)
+    N14{Advocacy Strategy}
+    N15(Forecasting and Scenario Planning)
+    N16[/Interagency Coordination/]
+    N17(Feasibility Study)
+    N18(Public Opinion Research)
+    N19([Public Consultation Process])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Policy Brief Writing
+        nest0_0[Comparative Policy Analysis]
+        nest0_1[(Political Feasibility Assessment)]
+    end
+    subgraph Legal Review
+        nest1_0[Cost_Benefit Analysis]
+        nest1_1(Problem Identification)
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> |develops| N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> |advises| N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 -.-> |revises| N15
+    N15 -.-> N16
+    N16 -.-> N17
+    N17 --> N18
+    N18 -.-> |analyzes| N19
+    nest0_0 --> nest0_1
+    N6 --> |audits| nest0_0
+    nest0_1 -.-> N3
+    nest1_0 -.-> nest1_1
+    N16 --> nest1_0
+    nest1_1 --> N5
+    N14 -.-> S0
+    S0 --> N19
+    S0 --> N17
+    S0 -.-> |trains| N16
+    N3 -.-> S1
+    S1 -.-> N18
+    S1 --> |ethics| N11
+    S1 -.-> N17
+    N5 -.-> S2
+    S2 --> N8
+    S2 -.-> N10
+    N9 -.-> M0
+    N5 -.-> M0
+    M0 -.-> N15
+    N1 -.-> M1
+    N0 --> M1
+    M1 --> N8
+    N1 -.-> M2
+    N2 -.-> M2
+    N6 --> M2
+    M2 --> N16
+    style N0 fill:#E0E6E9,stroke:#AABEC6
+    style N1 fill:#C2E8E6,stroke:#61CAC3
+    style N2 fill:#E0E6E9,stroke:#AABEC6
+    style N3 fill:#E8F0FF,stroke:#A2D0FF
+    style N4 fill:#E8F0FF,stroke:#A2D0FF
+    style N5 fill:#E0E6E9,stroke:#AABEC6
+    style N6 fill:#E0E6E9,stroke:#AABEC6
+    style N7 fill:#E0E6E9,stroke:#AABEC6
+    style N8 fill:#E8F0FF,stroke:#A2D0FF
+    style N9 fill:#E0E6E9,stroke:#AABEC6
+    style N10 fill:#E8F0FF,stroke:#A2D0FF
+    style N11 fill:#E0E6E9,stroke:#AABEC6
+    style N12 fill:#E8F0FF,stroke:#A2D0FF
+    style N13 fill:#E0E6E9,stroke:#AABEC6
+    style N14 fill:#C2E8E6,stroke:#61CAC3
+    style N15 fill:#C2E8E6,stroke:#61CAC3
+    style N16 fill:#E0E6E9,stroke:#AABEC6
+    style N17 fill:#C2E8E6,stroke:#61CAC3
+    style N18 fill:#E8F0FF,stroke:#A2D0FF
+    style N19 fill:#E8F0FF,stroke:#A2D0FF
+    style S0 fill:#E0E6E9,stroke:#AABEC6
+    style S1 fill:#E0E6E9,stroke:#AABEC6
+    style S2 fill:#C2E8E6,stroke:#61CAC3
+    style M0 fill:#E8F0FF,stroke:#A2D0FF
+    style M1 fill:#C2E8E6,stroke:#61CAC3
+    style M2 fill:#C2E8E6,stroke:#61CAC3
+    style nest0_0 fill:#C2E8E6,stroke:#61CAC3
+    style nest0_1 fill:#E8F0FF,stroke:#A2D0FF
+    style nest1_0 fill:#C2E8E6,stroke:#61CAC3
+    style nest1_1 fill:#C2E8E6,stroke:#61CAC3
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
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+    linkStyle 14 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#A2D0FF,stroke-width:2px,fill:none;
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+    linkStyle 20 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A2D0FF,stroke-width:2px,fill:none;
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+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
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+    linkStyle 27 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A2D0FF,stroke-width:2px,fill:none;
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+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#61CAC3,stroke-width:2px,fill:none;
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+    linkStyle 44 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 45 stroke:#A2D0FF,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_283.txt b/test/mermaid/hard/mermaid_283.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ccb50c2f0e3e29f2078008ac550d9e9d89906718
--- /dev/null
+++ b/test/mermaid/hard/mermaid_283.txt
@@ -0,0 +1,44 @@
+<Advocacy Strategy, connectedTo, Feasibility Study>
+<Advocacy Strategy, connectedTo, Public Consultation Process>
+<Advocacy Strategy, revises, Forecasting and Scenario Planning>
+<Advocacy Strategy, trains, Interagency Coordination>
+<Budgetary Implications, connectedTo, Policy Simulation Models>
+<Communication Strategy, connectedTo, Ethical Considerations>
+<Communication Strategy, connectedTo, Interagency Coordination>
+<Communication Strategy, connectedTo, Policy Simulation Models>
+<Comparative Policy Analysis, connectedTo, Political Feasibility Assessment>
+<Comparative Policy Analysis, partOf, Policy Brief Writing>
+<Cost_Benefit Analysis, connectedTo, Problem Identification>
+<Cost_Benefit Analysis, partOf, Legal Review>
+<Data Visualization for Policy, connectedTo, Feasibility Study>
+<Data Visualization for Policy, connectedTo, Public Opinion Research>
+<Data Visualization for Policy, connectedTo, Risk Assessment>
+<Data Visualization for Policy, ethics, Regulatory Impact Assessment>
+<Ethical Considerations, connectedTo, Interagency Coordination>
+<Ethical Considerations, develops, Data Visualization for Policy>
+<Feasibility Study, connectedTo, Public Opinion Research>
+<Forecasting and Scenario Planning, connectedTo, Interagency Coordination>
+<Impact Assessment, connectedTo, Regulatory Impact Assessment>
+<Interagency Coordination, connectedTo, Cost_Benefit Analysis>
+<Interagency Coordination, connectedTo, Feasibility Study>
+<International Policy Analysis, connectedTo, Communication Strategy>
+<International Policy Analysis, connectedTo, Policy Simulation Models>
+<Monitoring and Evaluation Framework, connectedTo, Forecasting and Scenario Planning>
+<Monitoring and Evaluation Framework, connectedTo, Impact Assessment>
+<Policy Simulation Models, connectedTo, Monitoring and Evaluation Framework>
+<Political Feasibility Assessment, connectedTo, Data Visualization for Policy>
+<Political Feasibility Assessment, partOf, Policy Brief Writing>
+<Presentation Skills, advises, Budgetary Implications>
+<Presentation Skills, audits, Comparative Policy Analysis>
+<Presentation Skills, connectedTo, Interagency Coordination>
+<Problem Identification, connectedTo, Stakeholder Analysis>
+<Problem Identification, partOf, Legal Review>
+<Program Design, connectedTo, Recommendation Formulation>
+<Public Opinion Research, analyzes, Public Consultation Process>
+<Recommendation Formulation, connectedTo, Advocacy Strategy>
+<Regulatory Impact Assessment, connectedTo, Program Design>
+<Risk Assessment, connectedTo, Stakeholder Analysis>
+<Stakeholder Analysis, connectedTo, Forecasting and Scenario Planning>
+<Stakeholder Analysis, connectedTo, Impact Assessment>
+<Stakeholder Analysis, connectedTo, Policy Simulation Models>
+<Stakeholder Analysis, connectedTo, Presentation Skills>
diff --git a/test/mermaid/hard/mermaid_285.txt b/test/mermaid/hard/mermaid_285.txt
new file mode 100644
index 0000000000000000000000000000000000000000..169d1b424c43b8e1375523ba8c7f0da296c3bf48
--- /dev/null
+++ b/test/mermaid/hard/mermaid_285.txt
@@ -0,0 +1,39 @@
+<Behavioral Economics in Policy, connectedTo, Legal Review>
+<Behavioral Economics in Policy, connectedTo, Public Opinion Research>
+<Budgetary Implications, connectedTo, Political Feasibility Assessment>
+<Budgetary Implications, partOf, Impact Assessment>
+<Criteria Establishment, connectedTo, Data Visualization for Policy>
+<Criteria Establishment, connectedTo, Interagency Coordination>
+<Criteria Establishment, connectedTo, National Policy Development>
+<Data Visualization for Policy, connectedTo, National Policy Development>
+<Data Visualization for Policy, connectedTo, Regulatory Impact Assessment>
+<Evidence_Based Policymaking, partOf, Problem Identification>
+<Evidence_Based Policymaking, strategies, Recommendation Formulation>
+<Forecasting and Scenario Planning, connectedTo, Policy Learning>
+<Forecasting and Scenario Planning, partOf, Impact Assessment>
+<Interagency Coordination, connectedTo, Data Visualization for Policy>
+<Interagency Coordination, connectedTo, Stakeholder Analysis>
+<Legal Review, connectedTo, Comparative Policy Analysis>
+<National Policy Development, analyzes, Political Feasibility Assessment>
+<National Policy Development, connectedTo, Behavioral Economics in Policy>
+<National Policy Development, connectedTo, Legal Review>
+<Policy Advocacy and Lobbying, connectedTo, Evidence_Based Policymaking>
+<Policy Advocacy and Lobbying, partOf, Problem Identification>
+<Policy Learning, connectedTo, Quantitative Analysis>
+<Policy Learning, partOf, Impact Assessment>
+<Political Feasibility Assessment, connectedTo, Behavioral Economics in Policy>
+<Public Opinion Research, connectedTo, Policy Advocacy and Lobbying>
+<Public Opinion Research, partOf, Problem Identification>
+<Quantitative Analysis, connectedTo, Budgetary Implications>
+<Quantitative Analysis, partOf, Impact Assessment>
+<Recommendation Formulation, connectedTo, Stakeholder Analysis>
+<Recommendation Formulation, partOf, Problem Identification>
+<Regulatory Impact Assessment, connectedTo, National Policy Development>
+<Report Drafting, connectedTo, Data Visualization for Policy>
+<Report Drafting, connectedTo, Forecasting and Scenario Planning>
+<Report Drafting, connectedTo, National Policy Development>
+<Report Drafting, connectedTo, Political Feasibility Assessment>
+<Report Drafting, drafts, Comparative Policy Analysis>
+<Stakeholder Analysis, connectedTo, Report Drafting>
+<start, connectedTo, Criteria Establishment>
+<start, connectedTo, Data Visualization for Policy>
diff --git a/test/mermaid/hard/mermaid_286.mmd b/test/mermaid/hard/mermaid_286.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..5b2dbe5629a9db892677f0ae555f367e86ef4e10
--- /dev/null
+++ b/test/mermaid/hard/mermaid_286.mmd
@@ -0,0 +1,77 @@
+graph BT
+    N0([start])
+    N1([Citation Management])
+    N2[Data Visualization for Research]
+    N3[Presentation at Conferences]
+    N4{Poster Session Preparation}
+    N5(Sampling Techniques)
+    N6[(Model Building)]
+    N7([Software for Statistical Analysis])
+    N8(Academic Mentorship)
+    N9[/Meta_Analysis/]
+    N10(Reproducibility Studies)
+    M1(( ))
+    subgraph Experiment Design
+        nest0_0[Data Management Plan]
+        nest0_1([Variable Identification])
+        nest0_2(Power Analysis)
+        nest0_3[/Journal Publication/]
+    end
+    subgraph Methodology Selection
+        nest1_0[[Research Ethics Application]]
+        nest1_1[Research Question Refinement]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> |yes| N10
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N2 --> nest0_0
+    nest0_3 --> N1
+    nest1_0 --> nest1_1
+    N5 -.-> nest1_0
+    nest1_1 -.-> N8
+    N5 -.-> M1
+    N7 -.-> M1
+    N1 --> |yes| M1
+    N4 --> M1
+    M1 -.-> N10
+    N10 --> N8
+    nest1_1 -.-> nest0_3
+    nest0_1 -.-> nest0_0
+    style M1 fill:#FFE88D,stroke:#FFDA4E
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFDA4E,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_287.mmd b/test/mermaid/hard/mermaid_287.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..f3e56b5bb79cf43a8e145dd81f18760d17ab79ce
--- /dev/null
+++ b/test/mermaid/hard/mermaid_287.mmd
@@ -0,0 +1,97 @@
+graph RL
+    N0([start])
+    N1(Funding Agency Reporting)
+    N2[(Data Collection)]
+    N3(Research Impact Assessment)
+    N4{Research Ethics Application}
+    N5[[Data Visualization for Research]]
+    N6(Hypothesis Formulation)
+    N7([Peer Review Process])
+    N8{Experiment Design}
+    N9[[Intellectual Property in Research]]
+    N10{Model Building}
+    N11(Plagiarism Detection)
+    N12(Grant Proposal Writing)
+    N13[/Qualitative Analysis/]
+    N14([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    subgraph Reproducibility Studies
+        nest0_0[(Presentation at Conferences)]
+        nest0_1[[Methodology Selection]]
+    end
+    subgraph Manuscript Writing
+        nest1_0[[Research Collaboration]]
+        nest1_1(Citation Management)
+        nest1_2([Sampling Techniques])
+        nest1_3(Thesis or Dissertation Writing)
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> |no| N13
+    N13 -.-> N14
+    nest0_0 --> nest0_1
+    N6 -.-> |yes| nest0_0
+    nest0_1 --> N14
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N2 --> |no| nest1_0
+    nest1_3 --> N10
+    N0 --> S0
+    S0 --> N13
+    S0 --> |yes| N14
+    S0 -.-> N9
+    N3 --> S1
+    S1 --> |no| N6
+    S1 -.-> N7
+    N6 --> M0
+    N4 --> M0
+    M0 -.-> N10
+    style S0 fill:#FCE4EC,stroke:#F06292
+    style S1 fill:#E4E0DF,stroke:#BDAFA8
+    style M0 fill:#E4E0DF,stroke:#BDAFA8
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_288.mmd b/test/mermaid/hard/mermaid_288.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..b36134314044b43b44523adec43ce82e77d13999
--- /dev/null
+++ b/test/mermaid/hard/mermaid_288.mmd
@@ -0,0 +1,127 @@
+graph BT
+    N0([start])
+    N1[Thesis or Dissertation Writing]
+    N2(Manuscript Writing)
+    N3[Research Question Refinement]
+    N4(Poster Session Preparation)
+    N5{Peer Review Process}
+    N6[[Intellectual Property in Research]]
+    N7{Public Engagement with Research}
+    N8[Open Science Practices]
+    N9[Hypothesis Formulation]
+    N10(Research Design)
+    N11[Meta_Analysis]
+    N12[Research Ethics Application]
+    N13[Academic Mentorship]
+    N14[Survey Design]
+    N15([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Data Visualization for Research
+        nest0_0[[Model Building]]
+        nest0_1[/Citation Management/]
+        nest0_2{Methodology Selection}
+    end
+    subgraph Bias Mitigation
+        nest1_0[/Grant Proposal Writing/]
+        nest1_1[/Research Collaboration/]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> |yes| N3
+    N3 -.-> |yes| N4
+    N4 -.-> |no| N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 -.-> N15
+    nest0_0 --> nest0_1
+    nest0_1 --> |yes| nest0_2
+    N14 --> nest0_0
+    nest0_2 --> |yes| N2
+    nest1_0 --> nest1_1
+    N9 -.-> nest1_0
+    nest1_1 --> N6
+    N2 --> S0
+    S0 --> |no| N8
+    S0 -.-> N10
+    S0 -.-> N9
+    N3 -.-> S1
+    S1 -.-> N11
+    S1 -.-> N9
+    N0 --> S2
+    S2 -.-> N8
+    S2 -.-> N5
+    S2 -.-> N10
+    N3 --> M0
+    N0 -.-> M0
+    N2 --> M0
+    N4 --> M0
+    M0 --> N6
+    N2 --> M1
+    N3 --> M1
+    M1 --> N7
+    N5 -.-> M2
+    N0 -.-> M2
+    M2 --> N10
+    style S0 fill:#DED7F0,stroke:#A188DB
+    style S1 fill:#FFF9D4,stroke:#FFE69C
+    style S2 fill:#DED7F0,stroke:#A188DB
+    style M0 fill:#FFFDE7,stroke:#FFF176
+    style M1 fill:#FFF9D4,stroke:#FFE69C
+    style M2 fill:#FFF9D4,stroke:#FFE69C
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_288.txt b/test/mermaid/hard/mermaid_288.txt
new file mode 100644
index 0000000000000000000000000000000000000000..49d176afd51754a4b364dd3848130c85e0f86bba
--- /dev/null
+++ b/test/mermaid/hard/mermaid_288.txt
@@ -0,0 +1,42 @@
+<Academic Mentorship, connectedTo, Survey Design>
+<Citation Management, partOf, Data Visualization for Research>
+<Citation Management, yes, Methodology Selection>
+<Grant Proposal Writing, connectedTo, Research Collaboration>
+<Grant Proposal Writing, partOf, Bias Mitigation>
+<Hypothesis Formulation, connectedTo, Grant Proposal Writing>
+<Hypothesis Formulation, connectedTo, Research Design>
+<Intellectual Property in Research, connectedTo, Public Engagement with Research>
+<Manuscript Writing, connectedTo, Hypothesis Formulation>
+<Manuscript Writing, connectedTo, Intellectual Property in Research>
+<Manuscript Writing, connectedTo, Public Engagement with Research>
+<Manuscript Writing, connectedTo, Research Design>
+<Manuscript Writing, no, Open Science Practices>
+<Manuscript Writing, yes, Research Question Refinement>
+<Meta_Analysis, connectedTo, Research Ethics Application>
+<Methodology Selection, partOf, Data Visualization for Research>
+<Methodology Selection, yes, Manuscript Writing>
+<Model Building, connectedTo, Citation Management>
+<Model Building, partOf, Data Visualization for Research>
+<Open Science Practices, connectedTo, Hypothesis Formulation>
+<Peer Review Process, connectedTo, Intellectual Property in Research>
+<Peer Review Process, connectedTo, Research Design>
+<Poster Session Preparation, connectedTo, Intellectual Property in Research>
+<Poster Session Preparation, no, Peer Review Process>
+<Public Engagement with Research, connectedTo, Open Science Practices>
+<Research Collaboration, connectedTo, Intellectual Property in Research>
+<Research Collaboration, partOf, Bias Mitigation>
+<Research Design, connectedTo, Meta_Analysis>
+<Research Ethics Application, connectedTo, Academic Mentorship>
+<Research Question Refinement, connectedTo, Hypothesis Formulation>
+<Research Question Refinement, connectedTo, Intellectual Property in Research>
+<Research Question Refinement, connectedTo, Meta_Analysis>
+<Research Question Refinement, connectedTo, Public Engagement with Research>
+<Research Question Refinement, yes, Poster Session Preparation>
+<Survey Design, connectedTo, Model Building>
+<Survey Design, connectedTo, end>
+<Thesis or Dissertation Writing, connectedTo, Manuscript Writing>
+<start, connectedTo, Intellectual Property in Research>
+<start, connectedTo, Open Science Practices>
+<start, connectedTo, Peer Review Process>
+<start, connectedTo, Research Design>
+<start, connectedTo, Thesis or Dissertation Writing>
diff --git a/test/mermaid/hard/mermaid_289.mmd b/test/mermaid/hard/mermaid_289.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..b40853f8d366ff1636d2ae951e0d87605447f73e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_289.mmd
@@ -0,0 +1,104 @@
+graph BT
+    N0([Authority Control])
+    N1[(AI in Library Services)]
+    N2[(Linked Data for Libraries)]
+    N3{Collection Development}
+    N4[(Subject Indexing)]
+    N5(Open Access Repository Management)
+    N6{Patron Services}
+    N7(System Upgrades)
+    N8(Acquisitions)
+    N9[[Serials Control]]
+    N10[Mobile App for Library]
+    N11(Technical Support for Systems)
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Data Migration
+        nest0_0(RFID System Implementation)
+        nest0_1[(Personalized Recommendations)]
+    end
+    subgraph Resource Sharing Networks
+        nest1_0{Preservation of Materials}
+        nest1_1[Electronic Resource Management]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> |accesses| N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> |indexes| N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    nest0_0 --> nest0_1
+    N8 --> nest0_0
+    nest0_1 --> N1
+    nest1_0 --> nest1_1
+    N7 -.-> nest1_0
+    nest1_1 -.-> N10
+    N0 --> S0
+    S0 --> N2
+    S0 -.-> N6
+    N2 -.-> S1
+    S1 -.-> N4
+    S1 -.-> N6
+    N1 --> M0
+    N0 -.-> M0
+    M0 -.-> N3
+    N1 -.-> M1
+    N0 -.-> M1
+    M1 -.-> N3
+    style N0 fill:#E3F2FD,stroke:#64B5F6
+    style N1 fill:#E3F2FD,stroke:#64B5F6
+    style N2 fill:#D3D7EB,stroke:#8C9EFF
+    style N3 fill:#D3D7EB,stroke:#8C9EFF
+    style N4 fill:#DFE7EB,stroke:#B0C5CD
+    style N5 fill:#E3F2FD,stroke:#64B5F6
+    style N6 fill:#E3F2FD,stroke:#64B5F6
+    style N7 fill:#D3D7EB,stroke:#8C9EFF
+    style N8 fill:#D3D7EB,stroke:#8C9EFF
+    style N9 fill:#E3F2FD,stroke:#64B5F6
+    style N10 fill:#D3D7EB,stroke:#8C9EFF
+    style N11 fill:#E3F2FD,stroke:#64B5F6
+    style S0 fill:#D3D7EB,stroke:#8C9EFF
+    style S1 fill:#E3F2FD,stroke:#64B5F6
+    style M0 fill:#DFE7EB,stroke:#B0C5CD
+    style M1 fill:#D3D7EB,stroke:#8C9EFF
+    style nest0_0 fill:#DFE7EB,stroke:#B0C5CD
+    style nest0_1 fill:#DFE7EB,stroke:#B0C5CD
+    style nest1_0 fill:#D3D7EB,stroke:#8C9EFF
+    style nest1_1 fill:#DFE7EB,stroke:#B0C5CD
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_289.txt b/test/mermaid/hard/mermaid_289.txt
new file mode 100644
index 0000000000000000000000000000000000000000..3f03740c37bcb81c59588577bf0167afe9fa5012
--- /dev/null
+++ b/test/mermaid/hard/mermaid_289.txt
@@ -0,0 +1,27 @@
+<AI in Library Services, connectedTo, Collection Development>
+<AI in Library Services, connectedTo, Linked Data for Libraries>
+<Acquisitions, connectedTo, RFID System Implementation>
+<Acquisitions, connectedTo, Serials Control>
+<Authority Control, connectedTo, AI in Library Services>
+<Authority Control, connectedTo, Collection Development>
+<Authority Control, connectedTo, Linked Data for Libraries>
+<Authority Control, connectedTo, Patron Services>
+<Collection Development, connectedTo, Subject Indexing>
+<Electronic Resource Management, connectedTo, Mobile App for Library>
+<Electronic Resource Management, partOf, Resource Sharing Networks>
+<Linked Data for Libraries, accesses, Collection Development>
+<Linked Data for Libraries, connectedTo, Patron Services>
+<Linked Data for Libraries, connectedTo, Subject Indexing>
+<Mobile App for Library, connectedTo, Technical Support for Systems>
+<Open Access Repository Management, connectedTo, Patron Services>
+<Patron Services, indexes, System Upgrades>
+<Personalized Recommendations, connectedTo, AI in Library Services>
+<Personalized Recommendations, partOf, Data Migration>
+<Preservation of Materials, connectedTo, Electronic Resource Management>
+<Preservation of Materials, partOf, Resource Sharing Networks>
+<RFID System Implementation, connectedTo, Personalized Recommendations>
+<RFID System Implementation, partOf, Data Migration>
+<Serials Control, connectedTo, Mobile App for Library>
+<Subject Indexing, connectedTo, Open Access Repository Management>
+<System Upgrades, connectedTo, Acquisitions>
+<System Upgrades, connectedTo, Preservation of Materials>
diff --git a/test/mermaid/hard/mermaid_29.mmd b/test/mermaid/hard/mermaid_29.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..a6b2de7e09c51915ec858f74fbde554c424ace18
--- /dev/null
+++ b/test/mermaid/hard/mermaid_29.mmd
@@ -0,0 +1,116 @@
+graph LR
+    N0([Data Usage Logging])
+    N1[[Broadband Provisioning]]
+    N2[[VoIP Service]]
+    N3([Antenna Maintenance])
+    N4([Device Setup])
+    N5[Outage Detection]
+    N6[[Issue Resolution]]
+    N7[Payment Received]
+    N8{Number Porting}
+    N9{Plan Renewal}
+    N10[/Mobile Top_up/]
+    N11[(Service Level Agreement)]
+    N12[Technical Support Escalation]
+    S0(( ))
+    S1(( ))
+    M2(( ))
+    subgraph Plan Selection
+        nest0_0(IoT Device Connection)
+        nest0_1(Plan Suspension)
+        nest0_2[(Roaming Activation)]
+        nest0_3([Service Complaint])
+    end
+    subgraph MMS Transmission
+        nest1_0[Call Recording]
+        nest1_1[(Service Activation Request)]
+        nest1_2[/Billing Inquiry/]
+    end
+    N0 -.-> N1
+    N1 --> |transmits| N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N3 -.-> nest0_0
+    nest0_3 -.-> N5
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> |filters| nest1_2
+    N1 -.-> nest1_0
+    nest1_2 -.-> N7
+    N4 -.-> S0
+    S0 -.-> N10
+    S0 -.-> N7
+    N4 -.-> S1
+    S1 -.-> |authorizes| N7
+    S1 --> N8
+    S1 -.-> |authenticates| N6
+    N3 --> M2
+    N2 -.-> M2
+    N0 -.-> M2
+    M2 -.-> N7
+    style N0 fill:#FFECB3,stroke:#FFC107
+    style N1 fill:#DFE7EB,stroke:#B0C5CD
+    style N2 fill:#FCE4EC,stroke:#E91E63
+    style N3 fill:#DFE7EB,stroke:#B0C5CD
+    style N4 fill:#FFECB3,stroke:#FFC107
+    style N5 fill:#FCE4EC,stroke:#E91E63
+    style N6 fill:#FFECB3,stroke:#FFC107
+    style N7 fill:#FFECB3,stroke:#FFC107
+    style N8 fill:#FFECB3,stroke:#FFC107
+    style N9 fill:#FCE4EC,stroke:#E91E63
+    style N10 fill:#FFECB3,stroke:#FFC107
+    style N11 fill:#FCE4EC,stroke:#E91E63
+    style N12 fill:#DFE7EB,stroke:#B0C5CD
+    style S0 fill:#DFE7EB,stroke:#B0C5CD
+    style S1 fill:#FCE4EC,stroke:#E91E63
+    style M2 fill:#FCE4EC,stroke:#E91E63
+    style nest0_0 fill:#FCE4EC,stroke:#E91E63
+    style nest0_1 fill:#FFECB3,stroke:#FFC107
+    style nest0_2 fill:#DFE7EB,stroke:#B0C5CD
+    style nest0_3 fill:#DFE7EB,stroke:#B0C5CD
+    style nest1_0 fill:#FFECB3,stroke:#FFC107
+    style nest1_1 fill:#FCE4EC,stroke:#E91E63
+    style nest1_2 fill:#FFECB3,stroke:#FFC107
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFC107,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_29.txt b/test/mermaid/hard/mermaid_29.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0655b18b28d22223aa5949951a17805db43bca00
--- /dev/null
+++ b/test/mermaid/hard/mermaid_29.txt
@@ -0,0 +1,36 @@
+<Antenna Maintenance, connectedTo, Device Setup>
+<Antenna Maintenance, connectedTo, IoT Device Connection>
+<Antenna Maintenance, connectedTo, Payment Received>
+<Billing Inquiry, connectedTo, Payment Received>
+<Billing Inquiry, partOf, MMS Transmission>
+<Broadband Provisioning, connectedTo, Call Recording>
+<Broadband Provisioning, transmits, VoIP Service>
+<Call Recording, connectedTo, Service Activation Request>
+<Call Recording, partOf, MMS Transmission>
+<Data Usage Logging, connectedTo, Broadband Provisioning>
+<Data Usage Logging, connectedTo, Payment Received>
+<Device Setup, authenticates, Issue Resolution>
+<Device Setup, authorizes, Payment Received>
+<Device Setup, connectedTo, Mobile Top_up>
+<Device Setup, connectedTo, Number Porting>
+<Device Setup, connectedTo, Outage Detection>
+<Device Setup, connectedTo, Payment Received>
+<IoT Device Connection, connectedTo, Plan Suspension>
+<IoT Device Connection, partOf, Plan Selection>
+<Issue Resolution, connectedTo, Payment Received>
+<Mobile Top_up, connectedTo, Service Level Agreement>
+<Number Porting, connectedTo, Plan Renewal>
+<Outage Detection, connectedTo, Issue Resolution>
+<Payment Received, connectedTo, Number Porting>
+<Plan Renewal, connectedTo, Mobile Top_up>
+<Plan Suspension, connectedTo, Roaming Activation>
+<Plan Suspension, partOf, Plan Selection>
+<Roaming Activation, connectedTo, Service Complaint>
+<Roaming Activation, partOf, Plan Selection>
+<Service Activation Request, filters, Billing Inquiry>
+<Service Activation Request, partOf, MMS Transmission>
+<Service Complaint, connectedTo, Outage Detection>
+<Service Complaint, partOf, Plan Selection>
+<Service Level Agreement, connectedTo, Technical Support Escalation>
+<VoIP Service, connectedTo, Antenna Maintenance>
+<VoIP Service, connectedTo, Payment Received>
diff --git a/test/mermaid/hard/mermaid_290.txt b/test/mermaid/hard/mermaid_290.txt
new file mode 100644
index 0000000000000000000000000000000000000000..d5be1f519b72fc3bf756ec8bc222fae64e90469d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_290.txt
@@ -0,0 +1,33 @@
+<Authority Control, connectedTo, Digitization Projects>
+<Authority Control, connectedTo, Federated Search>
+<Authority Control, connectedTo, Integrated Library Systems>
+<Authority Control, connectedTo, System Security>
+<Cataloging and Classification, connectedTo, System Upgrades>
+<Digital Resource Management, connectedTo, Patron Services>
+<Digitization Projects, connectedTo, Personalized Recommendations>
+<Digitization Projects, partOf, Circulation Management>
+<Discovery Layers, connectedTo, Digital Resource Management>
+<Federated Search, connectedTo, Search Functionality>
+<Federated Search, connectedTo, System Upgrades>
+<Integrated Library Systems, connectedTo, Federated Search>
+<Integrated Library Systems, connectedTo, System Upgrades>
+<Metadata Creation, no, Search Functionality>
+<Metadata Creation, partOf, Subject Indexing>
+<Online Public Access Catalog, partOf, Circulation Management>
+<Online Public Access Catalog, yes, Federated Search>
+<Personalized Recommendations, connectedTo, User Training on Systems>
+<Personalized Recommendations, partOf, Circulation Management>
+<Resource Sharing Networks, connectedTo, Serials Control>
+<Resource Sharing Networks, partOf, Subject Indexing>
+<Search Functionality, no, Cataloging and Classification>
+<Serials Control, partOf, Subject Indexing>
+<Serials Control, yes, Metadata Creation>
+<System Security, connectedTo, Resource Sharing Networks>
+<System Security, partOf, Subject Indexing>
+<System Upgrades, connectedTo, Digital Resource Management>
+<System Upgrades, connectedTo, Discovery Layers>
+<System Upgrades, connectedTo, Patron Services>
+<User Training on Systems, connectedTo, Online Public Access Catalog>
+<User Training on Systems, partOf, Circulation Management>
+<start, connectedTo, Authority Control>
+<start, connectedTo, Federated Search>
diff --git a/test/mermaid/hard/mermaid_291.mmd b/test/mermaid/hard/mermaid_291.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..f4901f15d717d5fb68235d791c0cc70e5cb1f6aa
--- /dev/null
+++ b/test/mermaid/hard/mermaid_291.mmd
@@ -0,0 +1,114 @@
+graph RL
+    N0([Discovery Layers])
+    N1[Open Access Repository Management]
+    N2[[Digitization Projects]]
+    N3(Data Migration)
+    N4[Resource Sharing Networks]
+    N5[AI in Library Services]
+    N6[/Library Management Systems/]
+    N7[User Account Management]
+    N8([Cataloging and Classification])
+    N9[Collection Development]
+    S0(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Authority Control
+        nest0_0[/Archival Integration/]
+        nest0_1[/System Security/]
+        nest0_2[RFID System Implementation]
+        nest0_3{Patron Services}
+    end
+    subgraph Personalized Recommendations
+        nest1_0[[Preservation of Materials]]
+        nest1_1[/User Training on Systems/]
+        nest1_2[/Automated Materials Handling/]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    nest0_0 --> nest0_1
+    nest0_1 --> |fines| nest0_2
+    nest0_2 --> nest0_3
+    N8 -.-> nest0_0
+    nest0_3 --> N1
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N4 -.-> nest1_0
+    nest1_2 --> N9
+    N0 -.-> S0
+    S0 --> N3
+    S0 -.-> |guides| N8
+    N4 -.-> S2
+    S2 --> N7
+    S2 -.-> N8
+    S2 -.-> N9
+    N1 --> M0
+    N3 --> M0
+    M0 -.-> N7
+    N6 --> M1
+    N2 -.-> |develops| M1
+    N5 --> M1
+    N0 -.-> M1
+    M1 -.-> N8
+    style N0 fill:#E4E0DF,stroke:#BDAFA8
+    style N1 fill:#E4E0DF,stroke:#BDAFA8
+    style N2 fill:#E4E0DF,stroke:#BDAFA8
+    style N3 fill:#E8EAF6,stroke:#7986CB
+    style N4 fill:#E4E0DF,stroke:#BDAFA8
+    style N5 fill:#E8EAF6,stroke:#7986CB
+    style N6 fill:#E8EAF6,stroke:#7986CB
+    style N7 fill:#E8EAF6,stroke:#7986CB
+    style N8 fill:#E8EAF6,stroke:#7986CB
+    style N9 fill:#E0F7FA,stroke:#00BCD4
+    style S0 fill:#E8EAF6,stroke:#7986CB
+    style S2 fill:#E0F7FA,stroke:#00BCD4
+    style M0 fill:#E8EAF6,stroke:#7986CB
+    style M1 fill:#E0F7FA,stroke:#00BCD4
+    style nest0_0 fill:#E8EAF6,stroke:#7986CB
+    style nest0_1 fill:#E8EAF6,stroke:#7986CB
+    style nest0_2 fill:#E8EAF6,stroke:#7986CB
+    style nest0_3 fill:#E8EAF6,stroke:#7986CB
+    style nest1_0 fill:#E4E0DF,stroke:#BDAFA8
+    style nest1_1 fill:#E8EAF6,stroke:#7986CB
+    style nest1_2 fill:#E4E0DF,stroke:#BDAFA8
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_291.txt b/test/mermaid/hard/mermaid_291.txt
new file mode 100644
index 0000000000000000000000000000000000000000..070cdbc9fa56c67ed5925962b2f9e0674c3e4340
--- /dev/null
+++ b/test/mermaid/hard/mermaid_291.txt
@@ -0,0 +1,36 @@
+<AI in Library Services, connectedTo, Cataloging and Classification>
+<AI in Library Services, connectedTo, Library Management Systems>
+<Archival Integration, connectedTo, System Security>
+<Archival Integration, partOf, Authority Control>
+<Automated Materials Handling, connectedTo, Collection Development>
+<Automated Materials Handling, partOf, Personalized Recommendations>
+<Cataloging and Classification, connectedTo, Archival Integration>
+<Cataloging and Classification, connectedTo, Collection Development>
+<Data Migration, connectedTo, Resource Sharing Networks>
+<Data Migration, connectedTo, User Account Management>
+<Digitization Projects, connectedTo, Data Migration>
+<Digitization Projects, develops, Cataloging and Classification>
+<Discovery Layers, connectedTo, Cataloging and Classification>
+<Discovery Layers, connectedTo, Data Migration>
+<Discovery Layers, connectedTo, Open Access Repository Management>
+<Discovery Layers, guides, Cataloging and Classification>
+<Library Management Systems, connectedTo, Cataloging and Classification>
+<Library Management Systems, connectedTo, User Account Management>
+<Open Access Repository Management, connectedTo, Digitization Projects>
+<Open Access Repository Management, connectedTo, User Account Management>
+<Patron Services, connectedTo, Open Access Repository Management>
+<Patron Services, partOf, Authority Control>
+<Preservation of Materials, connectedTo, User Training on Systems>
+<Preservation of Materials, partOf, Personalized Recommendations>
+<RFID System Implementation, connectedTo, Patron Services>
+<RFID System Implementation, partOf, Authority Control>
+<Resource Sharing Networks, connectedTo, AI in Library Services>
+<Resource Sharing Networks, connectedTo, Cataloging and Classification>
+<Resource Sharing Networks, connectedTo, Collection Development>
+<Resource Sharing Networks, connectedTo, Preservation of Materials>
+<Resource Sharing Networks, connectedTo, User Account Management>
+<System Security, fines, RFID System Implementation>
+<System Security, partOf, Authority Control>
+<User Account Management, connectedTo, Cataloging and Classification>
+<User Training on Systems, connectedTo, Automated Materials Handling>
+<User Training on Systems, partOf, Personalized Recommendations>
diff --git a/test/mermaid/hard/mermaid_292.txt b/test/mermaid/hard/mermaid_292.txt
new file mode 100644
index 0000000000000000000000000000000000000000..d14f1a16182b7b06a5c7baebe8933c7ceda51bf3
--- /dev/null
+++ b/test/mermaid/hard/mermaid_292.txt
@@ -0,0 +1,31 @@
+<Access and Reference Services, connectedTo, Digital Forensics for Archives>
+<Access and Reference Services, connectedTo, Ethical Use of Archival Materials>
+<Acquisition and Accessioning, connectedTo, Appraisal and Selection>
+<Acquisition and Accessioning, connectedTo, Collection Management Policy>
+<Appraisal and Selection, references, Digital Forensics for Archives>
+<Archival Advocacy, connectedTo, Community Archiving Projects>
+<Archival Advocacy, partOf, Security of Holdings>
+<Collection Management Policy, connectedTo, Conservation Treatment>
+<Community Archiving Projects, connectedTo, Subject Indexing for Archives>
+<Community Archiving Projects, partOf, Security of Holdings>
+<Database Management, connectedTo, Archival Advocacy>
+<Database Management, partOf, Security of Holdings>
+<Digital Forensics for Archives, connectedTo, Collection Management Policy>
+<Digital Forensics for Archives, connectedTo, Conservation Treatment>
+<Digital Forensics for Archives, connectedTo, Disaster Preparedness for Archives>
+<Digital Forensics for Archives, connectedTo, Public Access Systems>
+<Disaster Preparedness for Archives, connectedTo, Metadata Creation>
+<Disaster Preparedness for Archives, partOf, Digitization of Records>
+<Emulation for Obsolete Formats, connectedTo, Access and Reference Services>
+<Emulation for Obsolete Formats, connectedTo, Collection Management Policy>
+<Emulation for Obsolete Formats, connectedTo, Database Management>
+<Emulation for Obsolete Formats, connectedTo, Digital Forensics for Archives>
+<Environmental Control, connectedTo, Emulation for Obsolete Formats>
+<Ethical Use of Archival Materials, connectedTo, Long_Term Digital Preservation>
+<Long_Term Digital Preservation, connectedTo, Acquisition and Accessioning>
+<Long_Term Digital Preservation, connectedTo, Digital Forensics for Archives>
+<Metadata Creation, connectedTo, Digital Forensics for Archives>
+<Metadata Creation, partOf, Digitization of Records>
+<Public Access Systems, connectedTo, Collection Management Policy>
+<Subject Indexing for Archives, partOf, Security of Holdings>
+<Subject Indexing for Archives, restores, Conservation Treatment>
diff --git a/test/mermaid/hard/mermaid_293.mmd b/test/mermaid/hard/mermaid_293.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..967cbee8d88ff63c4a9de544641d08a4107d536f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_293.mmd
@@ -0,0 +1,102 @@
+graph BT
+    N0([Intellectual Property Rights Management])
+    N1[[Oral History Collection]]
+    N2[[Researchers Support]]
+    N3(Public Access Systems)
+    N4[(Serialization and Item Control)]
+    N5(Appraisal and Selection)
+    N6{Grant Writing for Archives}
+    N7{Ethical Use of Archival Materials}
+    N8{Preservation Planning}
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Community Archiving Projects
+        nest0_0(Metadata Creation)
+        nest0_1[Digital Forensics for Archives]
+        nest0_2([Records Management Integration])
+        nest0_3[Long_Term Digital Preservation]
+    end
+    subgraph Records Retention Scheduling
+        nest1_0([Conservation Treatment])
+        nest1_1[/Security of Holdings/]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> |preserves| N3
+    N3 -.-> N4
+    N4 -.-> |audits| N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N1 --> nest0_0
+    nest0_3 --> N5
+    nest1_0 --> nest1_1
+    N1 --> nest1_0
+    nest1_1 -.-> N7
+    N1 --> S0
+    S0 -.-> N6
+    S0 --> |complies| N3
+    N0 --> S1
+    S1 -.-> N7
+    S1 --> N4
+    N3 -.-> M0
+    N5 --> M0
+    N0 --> M0
+    M0 --> N8
+    N0 -.-> M2
+    N2 -.-> |governs| M2
+    M2 --> N8
+    style N0 fill:#EFE6FF,stroke:#C2B2F0
+    style N1 fill:#EDE7F6,stroke:#7E57C2
+    style N2 fill:#EFE6FF,stroke:#C2B2F0
+    style N3 fill:#EDE7F6,stroke:#7E57C2
+    style N4 fill:#B3E5FC,stroke:#03A9F4
+    style N5 fill:#EFE6FF,stroke:#C2B2F0
+    style N6 fill:#EFE6FF,stroke:#C2B2F0
+    style N7 fill:#EDE7F6,stroke:#7E57C2
+    style N8 fill:#B3E5FC,stroke:#03A9F4
+    style S0 fill:#B3E5FC,stroke:#03A9F4
+    style S1 fill:#B3E5FC,stroke:#03A9F4
+    style M0 fill:#B3E5FC,stroke:#03A9F4
+    style M2 fill:#B3E5FC,stroke:#03A9F4
+    style nest0_0 fill:#EFE6FF,stroke:#C2B2F0
+    style nest0_1 fill:#B3E5FC,stroke:#03A9F4
+    style nest0_2 fill:#EDE7F6,stroke:#7E57C2
+    style nest0_3 fill:#B3E5FC,stroke:#03A9F4
+    style nest1_0 fill:#EFE6FF,stroke:#C2B2F0
+    style nest1_1 fill:#EFE6FF,stroke:#C2B2F0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_293.txt b/test/mermaid/hard/mermaid_293.txt
new file mode 100644
index 0000000000000000000000000000000000000000..996145e4ad6e195e84a78a6ddb3db22839454207
--- /dev/null
+++ b/test/mermaid/hard/mermaid_293.txt
@@ -0,0 +1,30 @@
+<Appraisal and Selection, connectedTo, Grant Writing for Archives>
+<Appraisal and Selection, connectedTo, Preservation Planning>
+<Conservation Treatment, connectedTo, Security of Holdings>
+<Conservation Treatment, partOf, Records Retention Scheduling>
+<Digital Forensics for Archives, connectedTo, Records Management Integration>
+<Digital Forensics for Archives, partOf, Community Archiving Projects>
+<Ethical Use of Archival Materials, connectedTo, Preservation Planning>
+<Grant Writing for Archives, connectedTo, Ethical Use of Archival Materials>
+<Intellectual Property Rights Management, connectedTo, Ethical Use of Archival Materials>
+<Intellectual Property Rights Management, connectedTo, Oral History Collection>
+<Intellectual Property Rights Management, connectedTo, Preservation Planning>
+<Intellectual Property Rights Management, connectedTo, Serialization and Item Control>
+<Long_Term Digital Preservation, connectedTo, Appraisal and Selection>
+<Long_Term Digital Preservation, partOf, Community Archiving Projects>
+<Metadata Creation, connectedTo, Digital Forensics for Archives>
+<Metadata Creation, partOf, Community Archiving Projects>
+<Oral History Collection, complies, Public Access Systems>
+<Oral History Collection, connectedTo, Conservation Treatment>
+<Oral History Collection, connectedTo, Grant Writing for Archives>
+<Oral History Collection, connectedTo, Metadata Creation>
+<Oral History Collection, connectedTo, Researchers Support>
+<Public Access Systems, connectedTo, Preservation Planning>
+<Public Access Systems, connectedTo, Serialization and Item Control>
+<Records Management Integration, connectedTo, Long_Term Digital Preservation>
+<Records Management Integration, partOf, Community Archiving Projects>
+<Researchers Support, governs, Preservation Planning>
+<Researchers Support, preserves, Public Access Systems>
+<Security of Holdings, connectedTo, Ethical Use of Archival Materials>
+<Security of Holdings, partOf, Records Retention Scheduling>
+<Serialization and Item Control, audits, Appraisal and Selection>
diff --git a/test/mermaid/hard/mermaid_294.mmd b/test/mermaid/hard/mermaid_294.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..92cd48f3e1b4a186e535d5fd230c38571d42347a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_294.mmd
@@ -0,0 +1,90 @@
+graph TD
+    N0([start])
+    N1(Emulation for Obsolete Formats)
+    N2(Disaster Preparedness for Archives)
+    N3{Community Archiving Projects}
+    N4[[Subject Indexing for Archives]]
+    N5(Finding Aid Creation)
+    N6[Grant Writing for Archives]
+    N7[(Appraisal and Selection)]
+    N8[(Collection Management Policy)]
+    N9[Serialization and Item Control]
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Arrangement and Description
+        nest0_0{Data Migration for Digital Archives}
+        nest0_1{Intellectual Property Rights Management}
+        nest0_2[(Exhibition Curation)]
+        nest0_3([Archival Advocacy])
+    end
+    subgraph Security of Holdings
+        nest1_0[/Digital Asset Management/]
+        nest1_1[Access and Reference Services]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N5 --> nest0_0
+    nest0_3 -.-> N2
+    nest1_0 --> nest1_1
+    N2 --> nest1_0
+    nest1_1 --> N1
+    N2 -.-> S1
+    S1 -.-> N8
+    S1 -.-> N5
+    S1 --> N9
+    S1 -.-> N7
+    N1 -.-> M0
+    N6 -.-> M0
+    N2 --> M0
+    N4 --> M0
+    M0 --> N8
+    N0 -.-> M1
+    N3 --> M1
+    N1 -.-> M1
+    M1 -.-> N5
+    style S1 fill:#BBDEFB,stroke:#2196F3
+    style M0 fill:#BBDEFB,stroke:#2196F3
+    style M1 fill:#BBDEFB,stroke:#2196F3
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#81C784,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_295.mmd b/test/mermaid/hard/mermaid_295.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..379bb021c811aeda47d10d9d2b139ef2751910fd
--- /dev/null
+++ b/test/mermaid/hard/mermaid_295.mmd
@@ -0,0 +1,144 @@
+graph TD
+    N0([Digital Storytelling])
+    N1{Educational Technology Integration}
+    N2[Virtual Reality Experiences]
+    N3[(Predictive Maintenance for Tech)]
+    N4(Digital Signage)
+    N5[(Content Management Systems)]
+    N6[[Accessibility Technology for Visitors]]
+    N7(Conservation Technology)
+    N8[Digital Archiving]
+    N9[/Wayfinding Systems/]
+    N10[/User Experience Design/]
+    N11[Member Management Systems]
+    N12([Research Databases Access])
+    N13{Digital Preservation Strategies}
+    N14(Security Systems Integration)
+    N15[Crowdsourcing for Collections]
+    N16[[Interactive Display Development]]
+    N17[(Augmented Reality Experiences)]
+    N18([Collection Digitization])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph 3D Scanning of Artifacts
+        nest0_0[/Environmental Control Systems/]
+        nest0_1[[Online Shop Integration]]
+    end
+    subgraph Multisensory Exhibits
+        nest1_0(Cybersecurity for Museum Data)
+        nest1_1(RFID for Object Tracking)
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> |renders| N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 --> N14
+    N14 --> N15
+    N15 -.-> N16
+    N16 --> N17
+    N17 --> N18
+    nest0_0 -.-> nest0_1
+    N1 --> nest0_0
+    nest0_1 -.-> |scans| N9
+    nest1_0 --> nest1_1
+    N8 --> nest1_0
+    nest1_1 -.-> N17
+    N10 -.-> S0
+    S0 --> N17
+    S0 -.-> N16
+    S0 -.-> N14
+    S0 --> N15
+    N11 -.-> S1
+    S1 --> N17
+    S1 -.-> N14
+    S1 -.-> N16
+    S1 --> N18
+    N4 --> M0
+    N2 -.-> M0
+    N3 --> M0
+    N1 --> M0
+    M0 -.-> N6
+    N0 --> M2
+    N1 -.-> M2
+    M2 -.-> N3
+    style N0 fill:#EDF5F3,stroke:#A1D7CD
+    style N1 fill:#EFE6FF,stroke:#C2B2F0
+    style N2 fill:#EDF5F3,stroke:#A1D7CD
+    style N3 fill:#EDF5F3,stroke:#A1D7CD
+    style N4 fill:#EFE6FF,stroke:#C2B2F0
+    style N5 fill:#EFE6FF,stroke:#C2B2F0
+    style N6 fill:#C8E6C9,stroke:#4CAF50
+    style N7 fill:#EFE6FF,stroke:#C2B2F0
+    style N8 fill:#EDF5F3,stroke:#A1D7CD
+    style N9 fill:#EFE6FF,stroke:#C2B2F0
+    style N10 fill:#EFE6FF,stroke:#C2B2F0
+    style N11 fill:#C8E6C9,stroke:#4CAF50
+    style N12 fill:#EFE6FF,stroke:#C2B2F0
+    style N13 fill:#EFE6FF,stroke:#C2B2F0
+    style N14 fill:#EDF5F3,stroke:#A1D7CD
+    style N15 fill:#C8E6C9,stroke:#4CAF50
+    style N16 fill:#EDF5F3,stroke:#A1D7CD
+    style N17 fill:#EFE6FF,stroke:#C2B2F0
+    style N18 fill:#EFE6FF,stroke:#C2B2F0
+    style S0 fill:#EDF5F3,stroke:#A1D7CD
+    style S1 fill:#EFE6FF,stroke:#C2B2F0
+    style M0 fill:#EFE6FF,stroke:#C2B2F0
+    style M2 fill:#C8E6C9,stroke:#4CAF50
+    style nest0_0 fill:#EDF5F3,stroke:#A1D7CD
+    style nest0_1 fill:#EFE6FF,stroke:#C2B2F0
+    style nest1_0 fill:#EFE6FF,stroke:#C2B2F0
+    style nest1_1 fill:#EDF5F3,stroke:#A1D7CD
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#4CAF50,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#C2B2F0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_296.mmd b/test/mermaid/hard/mermaid_296.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..728e88e5b12e3a29a31f5fe679db9e43802c4938
--- /dev/null
+++ b/test/mermaid/hard/mermaid_296.mmd
@@ -0,0 +1,128 @@
+graph LR
+    N0([start])
+    N1(Multisensory Exhibits)
+    N2[Soundscape Design]
+    N3[/Security Systems Integration/]
+    N4([Visitor Flow Analysis])
+    N5[Research Databases Access]
+    N6([Content Management Systems])
+    N7[/Fundraising Technology/]
+    N8(Robotics in Exhibits)
+    N9[Digital Preservation Strategies]
+    N10[/Virtual Reality Experiences/]
+    N11{Digital Storytelling}
+    N12{Educational Technology Integration}
+    N13[/Database Management/]
+    N14([3D Scanning of Artifacts])
+    N15(Exhibition Lighting Design)
+    N16[[Gamification of Museum Experiences]]
+    N17(Digital Signage)
+    N18[/Environmental Control Systems/]
+    N19[/Accessibility Technology for Visitors/]
+    N20([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Digital Archiving
+        nest0_0([Online Shop Integration])
+        nest0_1{Community Engagement Platforms}
+    end
+    subgraph 3D Printing for Replicas
+        nest1_0[Mobile App Development]
+        nest1_1[[Ticketing and Visitor Systems]]
+        nest1_2[/Visitor Analytics/]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> |no| N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    N15 --> N16
+    N16 --> |yes| N17
+    N17 --> N18
+    N18 -.-> N19
+    N19 -.-> N20
+    nest0_0 -.-> nest0_1
+    N4 -.-> nest0_0
+    nest0_1 --> N10
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N16 -.-> nest1_0
+    nest1_2 -.-> N11
+    N7 --> S0
+    S0 --> N17
+    S0 -.-> N10
+    S0 --> N14
+    S0 -.-> N16
+    N10 -.-> S1
+    S1 --> N20
+    S1 -.-> N19
+    S1 --> N13
+    N3 --> M0
+    N13 -.-> M0
+    N16 -.-> M0
+    N9 --> M0
+    M0 --> N18
+    N1 -.-> M1
+    N11 -.-> M1
+    M1 --> N13
+    style S0 fill:#DFE7EB,stroke:#B0C5CD
+    style S1 fill:#DFE7EB,stroke:#B0C5CD
+    style M0 fill:#F8BBD0,stroke:#E91E63
+    style M1 fill:#F8BBD0,stroke:#E91E63
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#9FA9E1,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_296.txt b/test/mermaid/hard/mermaid_296.txt
new file mode 100644
index 0000000000000000000000000000000000000000..64078cffefffff7567dc4c6e14b0cf5297d245f4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_296.txt
@@ -0,0 +1,45 @@
+<3D Scanning of Artifacts, connectedTo, Exhibition Lighting Design>
+<Accessibility Technology for Visitors, connectedTo, end>
+<Community Engagement Platforms, connectedTo, Virtual Reality Experiences>
+<Community Engagement Platforms, partOf, Digital Archiving>
+<Content Management Systems, connectedTo, Fundraising Technology>
+<Database Management, connectedTo, 3D Scanning of Artifacts>
+<Database Management, connectedTo, Environmental Control Systems>
+<Digital Preservation Strategies, connectedTo, Environmental Control Systems>
+<Digital Preservation Strategies, connectedTo, Virtual Reality Experiences>
+<Digital Signage, connectedTo, Environmental Control Systems>
+<Digital Storytelling, connectedTo, Database Management>
+<Digital Storytelling, connectedTo, Educational Technology Integration>
+<Educational Technology Integration, connectedTo, Database Management>
+<Environmental Control Systems, connectedTo, Accessibility Technology for Visitors>
+<Exhibition Lighting Design, connectedTo, Gamification of Museum Experiences>
+<Fundraising Technology, connectedTo, 3D Scanning of Artifacts>
+<Fundraising Technology, connectedTo, Digital Signage>
+<Fundraising Technology, connectedTo, Gamification of Museum Experiences>
+<Fundraising Technology, connectedTo, Robotics in Exhibits>
+<Fundraising Technology, connectedTo, Virtual Reality Experiences>
+<Gamification of Museum Experiences, connectedTo, Environmental Control Systems>
+<Gamification of Museum Experiences, connectedTo, Mobile App Development>
+<Gamification of Museum Experiences, yes, Digital Signage>
+<Mobile App Development, connectedTo, Ticketing and Visitor Systems>
+<Mobile App Development, partOf, 3D Printing for Replicas>
+<Multisensory Exhibits, connectedTo, Database Management>
+<Multisensory Exhibits, connectedTo, Soundscape Design>
+<Online Shop Integration, connectedTo, Community Engagement Platforms>
+<Online Shop Integration, partOf, Digital Archiving>
+<Research Databases Access, connectedTo, Content Management Systems>
+<Robotics in Exhibits, connectedTo, Digital Preservation Strategies>
+<Security Systems Integration, connectedTo, Environmental Control Systems>
+<Security Systems Integration, connectedTo, Visitor Flow Analysis>
+<Soundscape Design, connectedTo, Security Systems Integration>
+<Ticketing and Visitor Systems, connectedTo, Visitor Analytics>
+<Ticketing and Visitor Systems, partOf, 3D Printing for Replicas>
+<Virtual Reality Experiences, connectedTo, Accessibility Technology for Visitors>
+<Virtual Reality Experiences, connectedTo, Database Management>
+<Virtual Reality Experiences, connectedTo, end>
+<Virtual Reality Experiences, no, Digital Storytelling>
+<Visitor Analytics, connectedTo, Digital Storytelling>
+<Visitor Analytics, partOf, 3D Printing for Replicas>
+<Visitor Flow Analysis, connectedTo, Online Shop Integration>
+<Visitor Flow Analysis, connectedTo, Research Databases Access>
+<start, connectedTo, Multisensory Exhibits>
diff --git a/test/mermaid/hard/mermaid_297.mmd b/test/mermaid/hard/mermaid_297.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..91848b5a8b2f7ae98b1d9ef954ac1fd579e9ae6c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_297.mmd
@@ -0,0 +1,120 @@
+graph TD
+    N0([3D Scanning of Artifacts])
+    N1(Digital Archiving)
+    N2([Interactive Display Development])
+    N3(Database Management)
+    N4{Accessibility Technology for Visitors}
+    N5[(Online Shop Integration)]
+    N6[Research Databases Access]
+    N7[Collection Digitization]
+    N8([Soundscape Design])
+    N9[/Educational Technology Integration/]
+    N10[User Experience Design]
+    N11([Mobile App Development])
+    N12[Exhibition Lighting Design]
+    N13[Predictive Maintenance for Tech]
+    S0(( ))
+    M0(( ))
+    subgraph Multisensory Exhibits
+        nest0_0(Crowdsourcing for Collections)
+        nest0_1(Security Systems Integration)
+        nest0_2[/Interactive Kiosks/]
+        nest0_3(Ticketing and Visitor Systems)
+    end
+    subgraph Robotics in Exhibits
+        nest1_0(Gamification of Museum Experiences)
+        nest1_1[/Digital Preservation Strategies/]
+        nest1_2[3D Printing for Replicas]
+        nest1_3(Community Engagement Platforms)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> |designs| N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> N13
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N8 --> nest0_0
+    nest0_3 --> N9
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N6 -.-> nest1_0
+    nest1_3 -.-> N1
+    N1 -.-> S0
+    S0 -.-> N12
+    S0 -.-> N6
+    S0 --> N7
+    N1 --> M0
+    N2 -.-> M0
+    N0 --> M0
+    M0 --> N4
+    N0 -.-> nest1_2
+    N4 -.-> nest1_1
+    style N0 fill:#F6F6F6,stroke:#CFCFCF
+    style N1 fill:#E9F7E8,stroke:#6EB76D
+    style N2 fill:#F6F6F6,stroke:#CFCFCF
+    style N3 fill:#E9F7E8,stroke:#6EB76D
+    style N4 fill:#F6F6F6,stroke:#CFCFCF
+    style N5 fill:#F6F6F6,stroke:#CFCFCF
+    style N6 fill:#E9F7E8,stroke:#6EB76D
+    style N7 fill:#F6F6F6,stroke:#CFCFCF
+    style N8 fill:#E9F7E8,stroke:#6EB76D
+    style N9 fill:#F6F6F6,stroke:#CFCFCF
+    style N10 fill:#E9F7E8,stroke:#6EB76D
+    style N11 fill:#FFFCE6,stroke:#FFF9AE
+    style N12 fill:#F6F6F6,stroke:#CFCFCF
+    style N13 fill:#E9F7E8,stroke:#6EB76D
+    style S0 fill:#E9F7E8,stroke:#6EB76D
+    style M0 fill:#E9F7E8,stroke:#6EB76D
+    style nest0_0 fill:#E9F7E8,stroke:#6EB76D
+    style nest0_1 fill:#FFFCE6,stroke:#FFF9AE
+    style nest0_2 fill:#FFFCE6,stroke:#FFF9AE
+    style nest0_3 fill:#E9F7E8,stroke:#6EB76D
+    style nest1_0 fill:#E9F7E8,stroke:#6EB76D
+    style nest1_1 fill:#F6F6F6,stroke:#CFCFCF
+    style nest1_2 fill:#FFFCE6,stroke:#FFF9AE
+    style nest1_3 fill:#E9F7E8,stroke:#6EB76D
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#6EB76D,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_297.txt b/test/mermaid/hard/mermaid_297.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c28a29bb720c5c9fc2ad9e5f8c5d075fb5ad05d3
--- /dev/null
+++ b/test/mermaid/hard/mermaid_297.txt
@@ -0,0 +1,39 @@
+<3D Printing for Replicas, connectedTo, Community Engagement Platforms>
+<3D Printing for Replicas, partOf, Robotics in Exhibits>
+<3D Scanning of Artifacts, connectedTo, 3D Printing for Replicas>
+<3D Scanning of Artifacts, connectedTo, Accessibility Technology for Visitors>
+<3D Scanning of Artifacts, connectedTo, Digital Archiving>
+<Accessibility Technology for Visitors, connectedTo, Digital Preservation Strategies>
+<Accessibility Technology for Visitors, connectedTo, Online Shop Integration>
+<Collection Digitization, connectedTo, Soundscape Design>
+<Community Engagement Platforms, connectedTo, Digital Archiving>
+<Community Engagement Platforms, partOf, Robotics in Exhibits>
+<Crowdsourcing for Collections, connectedTo, Security Systems Integration>
+<Crowdsourcing for Collections, partOf, Multisensory Exhibits>
+<Database Management, connectedTo, Accessibility Technology for Visitors>
+<Digital Archiving, connectedTo, Accessibility Technology for Visitors>
+<Digital Archiving, connectedTo, Collection Digitization>
+<Digital Archiving, connectedTo, Exhibition Lighting Design>
+<Digital Archiving, connectedTo, Interactive Display Development>
+<Digital Archiving, connectedTo, Research Databases Access>
+<Digital Preservation Strategies, connectedTo, 3D Printing for Replicas>
+<Digital Preservation Strategies, partOf, Robotics in Exhibits>
+<Educational Technology Integration, designs, User Experience Design>
+<Exhibition Lighting Design, connectedTo, Predictive Maintenance for Tech>
+<Gamification of Museum Experiences, connectedTo, Digital Preservation Strategies>
+<Gamification of Museum Experiences, partOf, Robotics in Exhibits>
+<Interactive Display Development, connectedTo, Accessibility Technology for Visitors>
+<Interactive Display Development, connectedTo, Database Management>
+<Interactive Kiosks, connectedTo, Ticketing and Visitor Systems>
+<Interactive Kiosks, partOf, Multisensory Exhibits>
+<Mobile App Development, connectedTo, Exhibition Lighting Design>
+<Online Shop Integration, connectedTo, Research Databases Access>
+<Research Databases Access, connectedTo, Collection Digitization>
+<Research Databases Access, connectedTo, Gamification of Museum Experiences>
+<Security Systems Integration, connectedTo, Interactive Kiosks>
+<Security Systems Integration, partOf, Multisensory Exhibits>
+<Soundscape Design, connectedTo, Crowdsourcing for Collections>
+<Soundscape Design, connectedTo, Educational Technology Integration>
+<Ticketing and Visitor Systems, connectedTo, Educational Technology Integration>
+<Ticketing and Visitor Systems, partOf, Multisensory Exhibits>
+<User Experience Design, connectedTo, Mobile App Development>
diff --git a/test/mermaid/hard/mermaid_298.mmd b/test/mermaid/hard/mermaid_298.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..b05b5a385582a8ff82233e41319c481a8d3eefeb
--- /dev/null
+++ b/test/mermaid/hard/mermaid_298.mmd
@@ -0,0 +1,110 @@
+graph BT
+    N0([start])
+    N1[[Supplier Code of Conduct]]
+    N2(Ethics Committee Formation)
+    N3[/Stakeholder Engagement on Ethics/]
+    N4[[Export Control Compliance]]
+    N5[(Healthcare Compliance)]
+    N6[[Anti_Bribery and Corruption Compliance]]
+    N7[/Sanctions Compliance/]
+    N8[/Incident Response Planning/]
+    N9(Transparent Communication)
+    N10[Financial Regulations Compliance]
+    N11([Data Ethics])
+    N12(Regulatory Interpretation)
+    N13[[Code of Conduct Implementation]]
+    N14([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Monitoring and Enforcement
+        nest0_0[Compliance Training]
+        nest0_1([CSR Reporting])
+        nest0_2[Compliance Software Implementation]
+    end
+    subgraph Labor Law Compliance
+        nest1_0(Ethical Leadership Development)
+        nest1_1(Third_Party Due Diligence)
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> |no| N10
+    N10 --> N11
+    N11 --> N12
+    N12 --> N13
+    N13 -.-> N14
+    nest0_0 --> |yes| nest0_1
+    nest0_1 -.-> nest0_2
+    N8 --> nest0_0
+    nest0_2 -.-> N2
+    nest1_0 -.-> nest1_1
+    N2 --> nest1_0
+    nest1_1 --> N11
+    N6 -.-> S0
+    S0 --> N9
+    S0 --> N14
+    N0 -.-> S1
+    S1 -.-> N14
+    S1 -.-> N10
+    N1 -.-> S2
+    S2 -.-> N9
+    S2 -.-> N3
+    N0 --> |no| M0
+    N3 -.-> M0
+    M0 --> N10
+    N4 --> M1
+    N3 -.-> M1
+    N2 --> M1
+    M1 --> N6
+    style S0 fill:#C2E8E6,stroke:#61CAC3
+    style S1 fill:#FFEBEE,stroke:#E57373
+    style S2 fill:#FFEBEE,stroke:#E57373
+    style M0 fill:#E1F5FE,stroke:#4FC3F7
+    style M1 fill:#C2E8E6,stroke:#61CAC3
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#61CAC3,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_298.txt b/test/mermaid/hard/mermaid_298.txt
new file mode 100644
index 0000000000000000000000000000000000000000..d690c154d0b8706b339e07e217df163e456ef25b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_298.txt
@@ -0,0 +1,37 @@
+<Anti_Bribery and Corruption Compliance, connectedTo, Sanctions Compliance>
+<Anti_Bribery and Corruption Compliance, connectedTo, Transparent Communication>
+<Anti_Bribery and Corruption Compliance, connectedTo, end>
+<CSR Reporting, connectedTo, Compliance Software Implementation>
+<CSR Reporting, partOf, Monitoring and Enforcement>
+<Code of Conduct Implementation, connectedTo, end>
+<Compliance Software Implementation, connectedTo, Ethics Committee Formation>
+<Compliance Software Implementation, partOf, Monitoring and Enforcement>
+<Compliance Training, partOf, Monitoring and Enforcement>
+<Compliance Training, yes, CSR Reporting>
+<Data Ethics, connectedTo, Regulatory Interpretation>
+<Ethical Leadership Development, connectedTo, Third_Party Due Diligence>
+<Ethical Leadership Development, partOf, Labor Law Compliance>
+<Ethics Committee Formation, connectedTo, Anti_Bribery and Corruption Compliance>
+<Ethics Committee Formation, connectedTo, Ethical Leadership Development>
+<Ethics Committee Formation, connectedTo, Stakeholder Engagement on Ethics>
+<Export Control Compliance, connectedTo, Anti_Bribery and Corruption Compliance>
+<Export Control Compliance, connectedTo, Healthcare Compliance>
+<Financial Regulations Compliance, connectedTo, Data Ethics>
+<Healthcare Compliance, connectedTo, Anti_Bribery and Corruption Compliance>
+<Incident Response Planning, connectedTo, Compliance Training>
+<Incident Response Planning, connectedTo, Transparent Communication>
+<Regulatory Interpretation, connectedTo, Code of Conduct Implementation>
+<Sanctions Compliance, connectedTo, Incident Response Planning>
+<Stakeholder Engagement on Ethics, connectedTo, Anti_Bribery and Corruption Compliance>
+<Stakeholder Engagement on Ethics, connectedTo, Export Control Compliance>
+<Stakeholder Engagement on Ethics, connectedTo, Financial Regulations Compliance>
+<Supplier Code of Conduct, connectedTo, Ethics Committee Formation>
+<Supplier Code of Conduct, connectedTo, Stakeholder Engagement on Ethics>
+<Supplier Code of Conduct, connectedTo, Transparent Communication>
+<Third_Party Due Diligence, connectedTo, Data Ethics>
+<Third_Party Due Diligence, partOf, Labor Law Compliance>
+<Transparent Communication, no, Financial Regulations Compliance>
+<start, connectedTo, Financial Regulations Compliance>
+<start, connectedTo, Supplier Code of Conduct>
+<start, connectedTo, end>
+<start, no, Financial Regulations Compliance>
diff --git a/test/mermaid/hard/mermaid_299.mmd b/test/mermaid/hard/mermaid_299.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..89ff627a7f28dd39e4d2a6a8542d08d614382ff5
--- /dev/null
+++ b/test/mermaid/hard/mermaid_299.mmd
@@ -0,0 +1,152 @@
+graph BT
+    N0([Regulatory Interpretation])
+    N1[/Labor Law Compliance/]
+    N2[(Sanctions Compliance)]
+    N3[Export Control Compliance]
+    N4{Information Security Compliance}
+    N5[(Bias Mitigation)]
+    N6[[Anti_Bribery and Corruption Compliance]]
+    N7{Policy Development}
+    N8[CSR Reporting]
+    N9[Incident Response Planning]
+    N10(Transparent Communication)
+    N11{Ethical Decision_Making Frameworks}
+    N12[Third_Party Due Diligence]
+    N13([Monitoring and Enforcement])
+    N14[/Compliance Hotlines/]
+    N15[(Compliance Training)]
+    N16([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Ethical AI Guidelines
+        nest0_0(Healthcare Compliance)
+        nest0_1[Consumer Protection Compliance]
+    end
+    subgraph Environmental Compliance
+        nest1_0(Conflict of Interest Management)
+        nest1_1(Ethics Committee Formation)
+        nest1_2(Stakeholder Engagement on Ethics)
+        nest1_3[Risk Assessment]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    N15 --> N16
+    nest0_0 -.-> nest0_1
+    N13 --> nest0_0
+    nest0_1 -.-> N14
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N6 -.-> nest1_0
+    nest1_3 --> N4
+    N7 --> S0
+    S0 -.-> N13
+    S0 --> N15
+    S0 -.-> N12
+    N4 -.-> S1
+    S1 -.-> N13
+    S1 -.-> N9
+    S1 -.-> |codes| N14
+    N1 --> S2
+    S2 --> N15
+    S2 -.-> N14
+    N7 -.-> M0
+    N1 -.-> M0
+    M0 -.-> N13
+    N2 -.-> M1
+    N3 --> M1
+    M1 -.-> N6
+    N5 --> |regulations| M2
+    N4 -.-> M2
+    M2 -.-> N10
+    style N0 fill:#ECEFF1,stroke:#90A4AE
+    style N1 fill:#F3E5F5,stroke:#AB47BC
+    style N2 fill:#ECEFF1,stroke:#90A4AE
+    style N3 fill:#F3E5F5,stroke:#AB47BC
+    style N4 fill:#E1BEE7,stroke:#9C27B0
+    style N5 fill:#F3E5F5,stroke:#AB47BC
+    style N6 fill:#E1BEE7,stroke:#9C27B0
+    style N7 fill:#E1BEE7,stroke:#9C27B0
+    style N8 fill:#F3E5F5,stroke:#AB47BC
+    style N9 fill:#ECEFF1,stroke:#90A4AE
+    style N10 fill:#ECEFF1,stroke:#90A4AE
+    style N11 fill:#E1BEE7,stroke:#9C27B0
+    style N12 fill:#ECEFF1,stroke:#90A4AE
+    style N13 fill:#ECEFF1,stroke:#90A4AE
+    style N14 fill:#ECEFF1,stroke:#90A4AE
+    style N15 fill:#ECEFF1,stroke:#90A4AE
+    style N16 fill:#E1BEE7,stroke:#9C27B0
+    style S0 fill:#F3E5F5,stroke:#AB47BC
+    style S1 fill:#F3E5F5,stroke:#AB47BC
+    style S2 fill:#E1BEE7,stroke:#9C27B0
+    style M0 fill:#E1BEE7,stroke:#9C27B0
+    style M1 fill:#ECEFF1,stroke:#90A4AE
+    style M2 fill:#ECEFF1,stroke:#90A4AE
+    style nest0_0 fill:#ECEFF1,stroke:#90A4AE
+    style nest0_1 fill:#F3E5F5,stroke:#AB47BC
+    style nest1_0 fill:#ECEFF1,stroke:#90A4AE
+    style nest1_1 fill:#F3E5F5,stroke:#AB47BC
+    style nest1_2 fill:#ECEFF1,stroke:#90A4AE
+    style nest1_3 fill:#E1BEE7,stroke:#9C27B0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#90A4AE,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_299.txt b/test/mermaid/hard/mermaid_299.txt
new file mode 100644
index 0000000000000000000000000000000000000000..1cc074225b8499270792bf5700f4e01bae68e8c0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_299.txt
@@ -0,0 +1,43 @@
+<Anti_Bribery and Corruption Compliance, connectedTo, Conflict of Interest Management>
+<Anti_Bribery and Corruption Compliance, connectedTo, Policy Development>
+<Bias Mitigation, connectedTo, Anti_Bribery and Corruption Compliance>
+<Bias Mitigation, regulations, Transparent Communication>
+<CSR Reporting, connectedTo, Incident Response Planning>
+<Compliance Hotlines, connectedTo, Compliance Training>
+<Compliance Training, connectedTo, end>
+<Conflict of Interest Management, connectedTo, Ethics Committee Formation>
+<Conflict of Interest Management, partOf, Environmental Compliance>
+<Consumer Protection Compliance, connectedTo, Compliance Hotlines>
+<Consumer Protection Compliance, partOf, Ethical AI Guidelines>
+<Ethical Decision_Making Frameworks, connectedTo, Third_Party Due Diligence>
+<Ethics Committee Formation, connectedTo, Stakeholder Engagement on Ethics>
+<Ethics Committee Formation, partOf, Environmental Compliance>
+<Export Control Compliance, connectedTo, Anti_Bribery and Corruption Compliance>
+<Export Control Compliance, connectedTo, Information Security Compliance>
+<Healthcare Compliance, connectedTo, Consumer Protection Compliance>
+<Healthcare Compliance, partOf, Ethical AI Guidelines>
+<Incident Response Planning, connectedTo, Transparent Communication>
+<Information Security Compliance, codes, Compliance Hotlines>
+<Information Security Compliance, connectedTo, Bias Mitigation>
+<Information Security Compliance, connectedTo, Incident Response Planning>
+<Information Security Compliance, connectedTo, Monitoring and Enforcement>
+<Information Security Compliance, connectedTo, Transparent Communication>
+<Labor Law Compliance, connectedTo, Compliance Hotlines>
+<Labor Law Compliance, connectedTo, Compliance Training>
+<Labor Law Compliance, connectedTo, Monitoring and Enforcement>
+<Labor Law Compliance, connectedTo, Sanctions Compliance>
+<Monitoring and Enforcement, connectedTo, Compliance Hotlines>
+<Monitoring and Enforcement, connectedTo, Healthcare Compliance>
+<Policy Development, connectedTo, CSR Reporting>
+<Policy Development, connectedTo, Compliance Training>
+<Policy Development, connectedTo, Monitoring and Enforcement>
+<Policy Development, connectedTo, Third_Party Due Diligence>
+<Regulatory Interpretation, connectedTo, Labor Law Compliance>
+<Risk Assessment, connectedTo, Information Security Compliance>
+<Risk Assessment, partOf, Environmental Compliance>
+<Sanctions Compliance, connectedTo, Anti_Bribery and Corruption Compliance>
+<Sanctions Compliance, connectedTo, Export Control Compliance>
+<Stakeholder Engagement on Ethics, connectedTo, Risk Assessment>
+<Stakeholder Engagement on Ethics, partOf, Environmental Compliance>
+<Third_Party Due Diligence, connectedTo, Monitoring and Enforcement>
+<Transparent Communication, connectedTo, Ethical Decision_Making Frameworks>
diff --git a/test/mermaid/hard/mermaid_3.txt b/test/mermaid/hard/mermaid_3.txt
new file mode 100644
index 0000000000000000000000000000000000000000..a5d3540b2002a6f0f557a6dde4d33463a058ecca
--- /dev/null
+++ b/test/mermaid/hard/mermaid_3.txt
@@ -0,0 +1,36 @@
+<AML Screening, connectedTo, KYC Validation>
+<AML Screening, partOf, Transaction Audit>
+<Account Closure, connectedTo, AML Screening>
+<Account Closure, connectedTo, Loan Processing>
+<Approval Decision, connectedTo, Asset Management>
+<Approval Decision, connectedTo, Dispute Resolution>
+<Approval Decision, connectedTo, Loan Processing>
+<Approval Decision, loans, Credit Scoring>
+<Asset Management, budgets, Credit Scoring>
+<Asset Management, connectedTo, Fraud Check>
+<Blockchain Verification, connectedTo, Merger and Acquisition>
+<Blockchain Verification, partOf, Collateral Evaluation>
+<Credit Scoring, connectedTo, Account Closure>
+<Credit Scoring, connectedTo, Loan Processing>
+<Credit Scoring, connectedTo, Market Analysis>
+<Credit Scoring, connectedTo, Mortgage Application>
+<Dispute Resolution, connectedTo, Mortgage Application>
+<Fraud Check, connectedTo, Dispute Resolution>
+<Fraud Check, connectedTo, Payment Gateway Integration>
+<Fraud Check, invests, Investment Planning>
+<Investment Planning, connectedTo, Credit Scoring>
+<KYC Validation, connectedTo, Tax Preparation>
+<KYC Validation, partOf, Transaction Audit>
+<Loan Processing, connectedTo, Dispute Resolution>
+<Loan Processing, connectedTo, Mortgage Application>
+<Loan Processing, disburses, Market Analysis>
+<Market Analysis, connectedTo, Dispute Resolution>
+<Merger and Acquisition, connectedTo, Approval Decision>
+<Merger and Acquisition, partOf, Collateral Evaluation>
+<Payment Gateway Integration, connectedTo, Blockchain Verification>
+<Payment Gateway Integration, partOf, Collateral Evaluation>
+<Tax Preparation, connectedTo, Fraud Check>
+<Tax Preparation, partOf, Transaction Audit>
+<start, connectedTo, Approval Decision>
+<start, connectedTo, Dispute Resolution>
+<start, connectedTo, Loan Processing>
diff --git a/test/mermaid/hard/mermaid_30.mmd b/test/mermaid/hard/mermaid_30.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..cf76234463db6b55e3221cab7faba5295f5f82d4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_30.mmd
@@ -0,0 +1,108 @@
+graph TD
+    N0([start])
+    N1([Video Conferencing])
+    N2{Service Complaint}
+    N3[(Plan Suspension)]
+    N4([Payment Received])
+    N5[/Fraudulent Call Blocking/]
+    N6{Call Recording}
+    N7{Speed Throttling}
+    N8[Device Setup]
+    N9[SIM Registration]
+    N10[(Plan Selection)]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Bill Generation
+        nest0_0[[Technical Support Escalation]]
+        nest0_1(Issue Resolution)
+        nest0_2[/Base Station Installation/]
+        nest0_3{Plan Renewal}
+    end
+    subgraph Spectrum Management
+        nest1_0[(Service Activation Request)]
+        nest1_1(Fiber Optic Deployment)
+        nest1_2[MMS Transmission]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N5 -.-> nest0_0
+    nest0_3 -.-> N1
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N5 --> |yes| nest1_0
+    nest1_2 -.-> |no| N3
+    N1 --> S0
+    S0 -.-> N8
+    S0 -.-> N7
+    S0 -.-> N5
+    N3 -.-> S1
+    S1 --> N7
+    S1 -.-> N5
+    N3 --> S2
+    S2 --> N9
+    S2 --> N7
+    S2 --> N10
+    N1 -.-> M0
+    N4 --> M0
+    N0 --> M0
+    M0 --> N8
+    N0 --> M1
+    N3 --> |yes| M1
+    M1 -.-> N5
+    style S0 fill:#E8F0EA,stroke:#92C79A
+    style S1 fill:#DDCEDD,stroke:#AF56A6
+    style S2 fill:#DDCEDD,stroke:#AF56A6
+    style M0 fill:#DDCEDD,stroke:#AF56A6
+    style M1 fill:#DDCEDD,stroke:#AF56A6
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFEB3B,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_300.mmd b/test/mermaid/hard/mermaid_300.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..4f88c3d1d4907aee254d281d04df69443fb35d56
--- /dev/null
+++ b/test/mermaid/hard/mermaid_300.mmd
@@ -0,0 +1,110 @@
+graph RL
+    N0([start])
+    N1{Healthcare Compliance}
+    N2[[Financial Regulations Compliance]]
+    N3(Ethics Committee Formation)
+    N4[Compliance Training]
+    N5([Corporate Governance Standards])
+    N6(Risk Assessment)
+    N7{Information Security Compliance}
+    N8[[Fair Competition Compliance]]
+    N9[Ethical Decision_Making Frameworks]
+    N10[/Environmental Compliance/]
+    N11[[Ethical AI Guidelines]]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Product Safety Compliance
+        nest0_0[[Data Ethics]]
+        nest0_1[/Data Privacy Compliance/]
+    end
+    subgraph Compliance Software Implementation
+        nest1_0[[Ethical Leadership Development]]
+        nest1_1[Policy Development]
+        nest1_2(Third_Party Due Diligence)
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> |defines| N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    nest0_0 -.-> nest0_1
+    N1 --> nest0_0
+    nest0_1 -.-> N3
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N1 -.-> |consults| nest1_0
+    nest1_2 --> N1
+    N8 -.-> S0
+    S0 --> N10
+    S0 -.-> N11
+    N4 -.-> S1
+    S1 -.-> N7
+    S1 -.-> N8
+    N5 --> M0
+    N0 -.-> |investigates| M0
+    M0 -.-> N9
+    N5 -.-> M1
+    N6 -.-> M1
+    N2 --> M1
+    M1 --> N9
+    style N0 fill:#E9F7E8,stroke:#6EB76D
+    style N1 fill:#FBE9E7,stroke:#FF8A65
+    style N2 fill:#FFECB3,stroke:#FFC107
+    style N3 fill:#FBE9E7,stroke:#FF8A65
+    style N4 fill:#E9F7E8,stroke:#6EB76D
+    style N5 fill:#E9F7E8,stroke:#6EB76D
+    style N6 fill:#E9F7E8,stroke:#6EB76D
+    style N7 fill:#FFECB3,stroke:#FFC107
+    style N8 fill:#E9F7E8,stroke:#6EB76D
+    style N9 fill:#FFECB3,stroke:#FFC107
+    style N10 fill:#E9F7E8,stroke:#6EB76D
+    style N11 fill:#FBE9E7,stroke:#FF8A65
+    style S0 fill:#FBE9E7,stroke:#FF8A65
+    style S1 fill:#FBE9E7,stroke:#FF8A65
+    style M0 fill:#FBE9E7,stroke:#FF8A65
+    style M1 fill:#FBE9E7,stroke:#FF8A65
+    style nest0_0 fill:#E9F7E8,stroke:#6EB76D
+    style nest0_1 fill:#FFECB3,stroke:#FFC107
+    style nest1_0 fill:#FBE9E7,stroke:#FF8A65
+    style nest1_1 fill:#FBE9E7,stroke:#FF8A65
+    style nest1_2 fill:#E9F7E8,stroke:#6EB76D
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FF8A65,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_300.txt b/test/mermaid/hard/mermaid_300.txt
new file mode 100644
index 0000000000000000000000000000000000000000..34634c80eb6077530630b4499248781a49f1460e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_300.txt
@@ -0,0 +1,31 @@
+<Compliance Training, connectedTo, Corporate Governance Standards>
+<Compliance Training, connectedTo, Fair Competition Compliance>
+<Compliance Training, connectedTo, Information Security Compliance>
+<Corporate Governance Standards, connectedTo, Ethical Decision_Making Frameworks>
+<Corporate Governance Standards, defines, Risk Assessment>
+<Data Ethics, connectedTo, Data Privacy Compliance>
+<Data Ethics, partOf, Product Safety Compliance>
+<Data Privacy Compliance, connectedTo, Ethics Committee Formation>
+<Data Privacy Compliance, partOf, Product Safety Compliance>
+<Environmental Compliance, connectedTo, Ethical AI Guidelines>
+<Ethical Decision_Making Frameworks, connectedTo, Environmental Compliance>
+<Ethical Leadership Development, connectedTo, Policy Development>
+<Ethical Leadership Development, partOf, Compliance Software Implementation>
+<Ethics Committee Formation, connectedTo, Compliance Training>
+<Fair Competition Compliance, connectedTo, Environmental Compliance>
+<Fair Competition Compliance, connectedTo, Ethical AI Guidelines>
+<Fair Competition Compliance, connectedTo, Ethical Decision_Making Frameworks>
+<Financial Regulations Compliance, connectedTo, Ethical Decision_Making Frameworks>
+<Financial Regulations Compliance, connectedTo, Ethics Committee Formation>
+<Healthcare Compliance, connectedTo, Data Ethics>
+<Healthcare Compliance, connectedTo, Financial Regulations Compliance>
+<Healthcare Compliance, consults, Ethical Leadership Development>
+<Information Security Compliance, connectedTo, Fair Competition Compliance>
+<Policy Development, connectedTo, Third_Party Due Diligence>
+<Policy Development, partOf, Compliance Software Implementation>
+<Risk Assessment, connectedTo, Ethical Decision_Making Frameworks>
+<Risk Assessment, connectedTo, Information Security Compliance>
+<Third_Party Due Diligence, connectedTo, Healthcare Compliance>
+<Third_Party Due Diligence, partOf, Compliance Software Implementation>
+<start, connectedTo, Healthcare Compliance>
+<start, investigates, Ethical Decision_Making Frameworks>
diff --git a/test/mermaid/hard/mermaid_301.mmd b/test/mermaid/hard/mermaid_301.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..702d80071027598abec19f12f51ac622d237d07e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_301.mmd
@@ -0,0 +1,132 @@
+graph BT
+    N0([Voice Recognition])
+    N1([Cyber Crime Investigation])
+    N2[[Courtroom Presentation]]
+    N3(Handwriting Analysis)
+    N4[[Forensic Psychology]]
+    N5[[DNA Profiling]]
+    N6[(Legal Standards Compliance)]
+    N7[/Laboratory Analysis/]
+    N8[Data Recovery]
+    N9[[Forensic Botany]]
+    N10(Facial Recognition)
+    N11[(Network Forensics)]
+    N12[(Vehicle Forensics)]
+    N13([Cloud Forensics])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Forensic Entomology
+        nest0_0[Polygraph Examination]
+        nest0_1[/Toxicology Testing/]
+        nest0_2[/Ballistics Analysis/]
+        nest0_3(Fingerprint Analysis)
+    end
+    subgraph Cold Case Review
+        nest1_0([Chain of Custody Management])
+        nest1_1[(Digital Forensics)]
+        nest1_2[Forensic Pathology]
+    end
+    N0 --> |processes| N1
+    N1 -.-> |examines| N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> |trace_evidence| N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 --> N13
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N5 -.-> nest0_0
+    nest0_3 --> |protects| N8
+    nest1_0 -.-> nest1_1
+    nest1_1 --> |investigates| nest1_2
+    N12 --> nest1_0
+    nest1_2 -.-> N8
+    N3 --> S0
+    S0 -.-> N10
+    S0 -.-> N7
+    S0 -.-> N12
+    N5 --> S1
+    S1 -.-> N10
+    S1 --> N11
+    S1 --> N9
+    N0 --> M0
+    N2 --> M0
+    N5 -.-> |complies| M0
+    M0 -.-> N8
+    N0 --> M1
+    N9 --> M1
+    N7 --> M1
+    M1 --> N12
+    style N0 fill:#DED7F0,stroke:#A188DB
+    style N1 fill:#DED7F0,stroke:#A188DB
+    style N2 fill:#DED7F0,stroke:#A188DB
+    style N3 fill:#E3F2FD,stroke:#64B5F6
+    style N4 fill:#E3F2FD,stroke:#64B5F6
+    style N5 fill:#DED7F0,stroke:#A188DB
+    style N6 fill:#FFE88D,stroke:#FFDA4E
+    style N7 fill:#E3F2FD,stroke:#64B5F6
+    style N8 fill:#E3F2FD,stroke:#64B5F6
+    style N9 fill:#DED7F0,stroke:#A188DB
+    style N10 fill:#E3F2FD,stroke:#64B5F6
+    style N11 fill:#FFE88D,stroke:#FFDA4E
+    style N12 fill:#E3F2FD,stroke:#64B5F6
+    style N13 fill:#E3F2FD,stroke:#64B5F6
+    style S0 fill:#E3F2FD,stroke:#64B5F6
+    style S1 fill:#FFE88D,stroke:#FFDA4E
+    style M0 fill:#FFE88D,stroke:#FFDA4E
+    style M1 fill:#E3F2FD,stroke:#64B5F6
+    style nest0_0 fill:#FFE88D,stroke:#FFDA4E
+    style nest0_1 fill:#E3F2FD,stroke:#64B5F6
+    style nest0_2 fill:#E3F2FD,stroke:#64B5F6
+    style nest0_3 fill:#DED7F0,stroke:#A188DB
+    style nest1_0 fill:#FFE88D,stroke:#FFDA4E
+    style nest1_1 fill:#FFE88D,stroke:#FFDA4E
+    style nest1_2 fill:#FFE88D,stroke:#FFDA4E
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_301.txt b/test/mermaid/hard/mermaid_301.txt
new file mode 100644
index 0000000000000000000000000000000000000000..bcdbbeb1771e980f9649ff4d389b47cb83ba1957
--- /dev/null
+++ b/test/mermaid/hard/mermaid_301.txt
@@ -0,0 +1,41 @@
+<Ballistics Analysis, connectedTo, Fingerprint Analysis>
+<Ballistics Analysis, partOf, Forensic Entomology>
+<Chain of Custody Management, connectedTo, Digital Forensics>
+<Chain of Custody Management, partOf, Cold Case Review>
+<Courtroom Presentation, connectedTo, Data Recovery>
+<Courtroom Presentation, connectedTo, Handwriting Analysis>
+<Cyber Crime Investigation, examines, Courtroom Presentation>
+<DNA Profiling, complies, Data Recovery>
+<DNA Profiling, connectedTo, Facial Recognition>
+<DNA Profiling, connectedTo, Forensic Botany>
+<DNA Profiling, connectedTo, Legal Standards Compliance>
+<DNA Profiling, connectedTo, Network Forensics>
+<DNA Profiling, connectedTo, Polygraph Examination>
+<Data Recovery, connectedTo, Forensic Botany>
+<Digital Forensics, investigates, Forensic Pathology>
+<Digital Forensics, partOf, Cold Case Review>
+<Facial Recognition, connectedTo, Network Forensics>
+<Fingerprint Analysis, partOf, Forensic Entomology>
+<Fingerprint Analysis, protects, Data Recovery>
+<Forensic Botany, connectedTo, Vehicle Forensics>
+<Forensic Botany, trace_evidence, Facial Recognition>
+<Forensic Pathology, connectedTo, Data Recovery>
+<Forensic Pathology, partOf, Cold Case Review>
+<Forensic Psychology, connectedTo, DNA Profiling>
+<Handwriting Analysis, connectedTo, Facial Recognition>
+<Handwriting Analysis, connectedTo, Forensic Psychology>
+<Handwriting Analysis, connectedTo, Laboratory Analysis>
+<Handwriting Analysis, connectedTo, Vehicle Forensics>
+<Laboratory Analysis, connectedTo, Data Recovery>
+<Laboratory Analysis, connectedTo, Vehicle Forensics>
+<Legal Standards Compliance, connectedTo, Laboratory Analysis>
+<Network Forensics, connectedTo, Vehicle Forensics>
+<Polygraph Examination, connectedTo, Toxicology Testing>
+<Polygraph Examination, partOf, Forensic Entomology>
+<Toxicology Testing, connectedTo, Ballistics Analysis>
+<Toxicology Testing, partOf, Forensic Entomology>
+<Vehicle Forensics, connectedTo, Chain of Custody Management>
+<Vehicle Forensics, connectedTo, Cloud Forensics>
+<Voice Recognition, connectedTo, Data Recovery>
+<Voice Recognition, connectedTo, Vehicle Forensics>
+<Voice Recognition, processes, Cyber Crime Investigation>
diff --git a/test/mermaid/hard/mermaid_302.mmd b/test/mermaid/hard/mermaid_302.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..28b1208a885b5397574171156c400749613fb335
--- /dev/null
+++ b/test/mermaid/hard/mermaid_302.mmd
@@ -0,0 +1,118 @@
+graph RL
+    N0([Forensic Accounting])
+    N1[Expert Witness Testimony]
+    N2[Cyber Crime Investigation]
+    N3[Vehicle Forensics]
+    N4(Trace Evidence Analysis)
+    N5[/Forensic Interviewing/]
+    N6[[Toxicology Testing]]
+    N7(Facial Recognition)
+    N8([Network Forensics])
+    N9{Mobile Device Forensics}
+    N10[Voice Recognition]
+    N11(Digital Forensics)
+    N12([Toolmark Analysis])
+    N13[Cloud Forensics]
+    N14[Legal Standards Compliance]
+    N15{Evidence Preservation}
+    N16([Arson Investigation])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    subgraph DNA Profiling
+        nest0_0[[Crime Database Search]]
+        nest0_1([Forensic Entomology])
+    end
+    subgraph Forensic Psychology
+        nest1_0([Fingerprint Analysis])
+        nest1_1[(Forensic Anthropology)]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> |ballistics| N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> |audits| N9
+    N9 --> N10
+    N10 --> N11
+    N11 --> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    N15 -.-> N16
+    nest0_0 -.-> nest0_1
+    N13 --> nest0_0
+    nest0_1 -.-> N16
+    nest1_0 --> |develops| nest1_1
+    N8 -.-> nest1_0
+    nest1_1 --> N16
+    N8 -.-> S0
+    S0 -.-> N10
+    S0 --> N15
+    S0 -.-> N11
+    N13 -.-> S1
+    S1 -.-> N16
+    S1 -.-> |tests| N15
+    N7 --> M0
+    N8 -.-> M0
+    M0 -.-> N10
+    style N0 fill:#EDE7F6,stroke:#9575CD
+    style N1 fill:#E8F0EA,stroke:#92C79A
+    style N2 fill:#E8F0EA,stroke:#92C79A
+    style N3 fill:#E1F5FE,stroke:#4FC3F7
+    style N4 fill:#E1F5FE,stroke:#4FC3F7
+    style N5 fill:#E8F0EA,stroke:#92C79A
+    style N6 fill:#E8F0EA,stroke:#92C79A
+    style N7 fill:#EDE7F6,stroke:#9575CD
+    style N8 fill:#EDE7F6,stroke:#9575CD
+    style N9 fill:#EDE7F6,stroke:#9575CD
+    style N10 fill:#EDE7F6,stroke:#9575CD
+    style N11 fill:#E8F0EA,stroke:#92C79A
+    style N12 fill:#E1F5FE,stroke:#4FC3F7
+    style N13 fill:#E8F0EA,stroke:#92C79A
+    style N14 fill:#E1F5FE,stroke:#4FC3F7
+    style N15 fill:#E1F5FE,stroke:#4FC3F7
+    style N16 fill:#EDE7F6,stroke:#9575CD
+    style S0 fill:#EDE7F6,stroke:#9575CD
+    style S1 fill:#E8F0EA,stroke:#92C79A
+    style M0 fill:#E1F5FE,stroke:#4FC3F7
+    style nest0_0 fill:#E8F0EA,stroke:#92C79A
+    style nest0_1 fill:#E8F0EA,stroke:#92C79A
+    style nest1_0 fill:#E1F5FE,stroke:#4FC3F7
+    style nest1_1 fill:#EDE7F6,stroke:#9575CD
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_302.txt b/test/mermaid/hard/mermaid_302.txt
new file mode 100644
index 0000000000000000000000000000000000000000..69f3b98d9b3b50271ca04372f8278a41797dbed4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_302.txt
@@ -0,0 +1,32 @@
+<Cloud Forensics, connectedTo, Arson Investigation>
+<Cloud Forensics, connectedTo, Crime Database Search>
+<Cloud Forensics, connectedTo, Legal Standards Compliance>
+<Cloud Forensics, tests, Evidence Preservation>
+<Crime Database Search, connectedTo, Forensic Entomology>
+<Crime Database Search, partOf, DNA Profiling>
+<Cyber Crime Investigation, connectedTo, Vehicle Forensics>
+<Digital Forensics, connectedTo, Toolmark Analysis>
+<Evidence Preservation, connectedTo, Arson Investigation>
+<Expert Witness Testimony, connectedTo, Cyber Crime Investigation>
+<Facial Recognition, connectedTo, Network Forensics>
+<Facial Recognition, connectedTo, Voice Recognition>
+<Fingerprint Analysis, develops, Forensic Anthropology>
+<Fingerprint Analysis, partOf, Forensic Psychology>
+<Forensic Accounting, connectedTo, Expert Witness Testimony>
+<Forensic Anthropology, connectedTo, Arson Investigation>
+<Forensic Anthropology, partOf, Forensic Psychology>
+<Forensic Entomology, connectedTo, Arson Investigation>
+<Forensic Entomology, partOf, DNA Profiling>
+<Forensic Interviewing, connectedTo, Toxicology Testing>
+<Legal Standards Compliance, connectedTo, Evidence Preservation>
+<Mobile Device Forensics, connectedTo, Voice Recognition>
+<Network Forensics, audits, Mobile Device Forensics>
+<Network Forensics, connectedTo, Digital Forensics>
+<Network Forensics, connectedTo, Evidence Preservation>
+<Network Forensics, connectedTo, Fingerprint Analysis>
+<Network Forensics, connectedTo, Voice Recognition>
+<Toolmark Analysis, connectedTo, Cloud Forensics>
+<Toxicology Testing, connectedTo, Facial Recognition>
+<Trace Evidence Analysis, connectedTo, Forensic Interviewing>
+<Vehicle Forensics, ballistics, Trace Evidence Analysis>
+<Voice Recognition, connectedTo, Digital Forensics>
diff --git a/test/mermaid/hard/mermaid_303.mmd b/test/mermaid/hard/mermaid_303.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..8927d9f64a1e8e892064f03f6ed264f151fbec66
--- /dev/null
+++ b/test/mermaid/hard/mermaid_303.mmd
@@ -0,0 +1,85 @@
+graph RL
+    N0([start])
+    N1{Cloud Forensics}
+    N2[Digital Forensics]
+    N3[Mobile Device Forensics]
+    N4{Toxicology Testing}
+    N5[/Data Recovery/]
+    N6(Forensic Odontology)
+    N7[Courtroom Presentation]
+    N8{Legal Standards Compliance}
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Vehicle Forensics
+        nest0_0[Forensic Photography]
+        nest0_1{Polygraph Examination}
+        nest0_2[Evidence Preservation]
+        nest0_3[(Laboratory Analysis)]
+    end
+    subgraph Voice Recognition
+        nest1_0[/Cyber Crime Investigation/]
+        nest1_1{Toolmark Analysis}
+        nest1_2(Facial Recognition)
+        nest1_3(Arson Investigation)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> N8
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> |yes| nest0_3
+    N4 -.-> nest0_0
+    nest0_3 --> N4
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 -.-> nest1_3
+    N4 --> nest1_0
+    nest1_3 --> N6
+    N0 --> S1
+    S1 --> N7
+    S1 -.-> N4
+    N4 -.-> S2
+    S2 --> N8
+    S2 --> N7
+    S2 --> N6
+    N1 --> M1
+    N0 -.-> M1
+    M1 --> N3
+    style S1 fill:#C8E6C9,stroke:#388E3C
+    style S2 fill:#EFE6FF,stroke:#C2B2F0
+    style M1 fill:#EFE6FF,stroke:#C2B2F0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_303.txt b/test/mermaid/hard/mermaid_303.txt
new file mode 100644
index 0000000000000000000000000000000000000000..01bfa771afb21f6d46d36acc6201900caf49076e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_303.txt
@@ -0,0 +1,33 @@
+<Arson Investigation, connectedTo, Forensic Odontology>
+<Arson Investigation, partOf, Voice Recognition>
+<Cloud Forensics, connectedTo, Digital Forensics>
+<Cloud Forensics, connectedTo, Mobile Device Forensics>
+<Courtroom Presentation, connectedTo, Legal Standards Compliance>
+<Cyber Crime Investigation, connectedTo, Toolmark Analysis>
+<Cyber Crime Investigation, partOf, Voice Recognition>
+<Data Recovery, connectedTo, Forensic Odontology>
+<Digital Forensics, connectedTo, Mobile Device Forensics>
+<Evidence Preservation, partOf, Vehicle Forensics>
+<Evidence Preservation, yes, Laboratory Analysis>
+<Facial Recognition, connectedTo, Arson Investigation>
+<Facial Recognition, partOf, Voice Recognition>
+<Forensic Odontology, connectedTo, Courtroom Presentation>
+<Forensic Photography, connectedTo, Polygraph Examination>
+<Forensic Photography, partOf, Vehicle Forensics>
+<Laboratory Analysis, connectedTo, Toxicology Testing>
+<Laboratory Analysis, partOf, Vehicle Forensics>
+<Mobile Device Forensics, connectedTo, Toxicology Testing>
+<Polygraph Examination, connectedTo, Evidence Preservation>
+<Polygraph Examination, partOf, Vehicle Forensics>
+<Toolmark Analysis, connectedTo, Facial Recognition>
+<Toolmark Analysis, partOf, Voice Recognition>
+<Toxicology Testing, connectedTo, Courtroom Presentation>
+<Toxicology Testing, connectedTo, Cyber Crime Investigation>
+<Toxicology Testing, connectedTo, Data Recovery>
+<Toxicology Testing, connectedTo, Forensic Odontology>
+<Toxicology Testing, connectedTo, Forensic Photography>
+<Toxicology Testing, connectedTo, Legal Standards Compliance>
+<start, connectedTo, Cloud Forensics>
+<start, connectedTo, Courtroom Presentation>
+<start, connectedTo, Mobile Device Forensics>
+<start, connectedTo, Toxicology Testing>
diff --git a/test/mermaid/hard/mermaid_305.mmd b/test/mermaid/hard/mermaid_305.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..cfc3d25825573619f5795562c72f3e50d9fa4afc
--- /dev/null
+++ b/test/mermaid/hard/mermaid_305.mmd
@@ -0,0 +1,114 @@
+graph BT
+    N0([start])
+    N1[[Risk Analysis]]
+    N2[Information Sharing]
+    N3(Threat Assessment)
+    N4[Hostage Negotiation]
+    N5[(Fusion Center Operations)]
+    N6[/Port Security/]
+    N7[(Training Exercises)]
+    N8[(Homeland Security Planning)]
+    N9[[Intelligence Gathering]]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Risk_Based Security Measures
+        nest0_0(Drone Countermeasures)
+        nest0_1([Data Analytics for Terrorism])
+        nest0_2[Legislation and Policy Development]
+        nest0_3(Radicalization Prevention)
+    end
+    subgraph Biometric Screening
+        nest1_0[/Transportation Security/]
+        nest1_1{Behavioral Threat Assessment}
+        nest1_2[/Vulnerability Assessment/]
+        nest1_3(Psychological Operations)
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> |yes| N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N3 -.-> nest0_0
+    nest0_3 --> |yes| N5
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N3 --> |yes| nest1_0
+    nest1_3 -.-> N8
+    N0 -.-> S0
+    S0 -.-> N6
+    S0 --> N4
+    S0 -.-> N9
+    S0 -.-> N2
+    N2 -.-> S1
+    S1 --> N6
+    S1 --> N4
+    S1 --> N5
+    S1 --> |no| N7
+    N1 --> S2
+    S2 -.-> N5
+    S2 --> N3
+    S2 --> N4
+    S2 --> N8
+    N1 --> M1
+    N0 --> M1
+    M1 -.-> N3
+    N5 -.-> |yes| M2
+    N1 -.-> M2
+    M2 -.-> N9
+    style S0 fill:#FCFCE7,stroke:#DCE775
+    style S1 fill:#FCFCE7,stroke:#DCE775
+    style S2 fill:#EFE6FF,stroke:#C2B2F0
+    style M1 fill:#FCFCE7,stroke:#DCE775
+    style M2 fill:#FCFCE7,stroke:#DCE775
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#DCE775,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_305.txt b/test/mermaid/hard/mermaid_305.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6894d741e1fd292db413967443c844cebb145f51
--- /dev/null
+++ b/test/mermaid/hard/mermaid_305.txt
@@ -0,0 +1,42 @@
+<Behavioral Threat Assessment, connectedTo, Vulnerability Assessment>
+<Behavioral Threat Assessment, partOf, Biometric Screening>
+<Data Analytics for Terrorism, connectedTo, Legislation and Policy Development>
+<Data Analytics for Terrorism, partOf, Risk_Based Security Measures>
+<Drone Countermeasures, connectedTo, Data Analytics for Terrorism>
+<Drone Countermeasures, partOf, Risk_Based Security Measures>
+<Fusion Center Operations, connectedTo, Port Security>
+<Fusion Center Operations, yes, Intelligence Gathering>
+<Homeland Security Planning, connectedTo, Intelligence Gathering>
+<Hostage Negotiation, connectedTo, Fusion Center Operations>
+<Information Sharing, connectedTo, Fusion Center Operations>
+<Information Sharing, connectedTo, Hostage Negotiation>
+<Information Sharing, connectedTo, Port Security>
+<Information Sharing, no, Training Exercises>
+<Information Sharing, yes, Threat Assessment>
+<Legislation and Policy Development, connectedTo, Radicalization Prevention>
+<Legislation and Policy Development, partOf, Risk_Based Security Measures>
+<Port Security, connectedTo, Training Exercises>
+<Psychological Operations, connectedTo, Homeland Security Planning>
+<Psychological Operations, partOf, Biometric Screening>
+<Radicalization Prevention, partOf, Risk_Based Security Measures>
+<Radicalization Prevention, yes, Fusion Center Operations>
+<Risk Analysis, connectedTo, Fusion Center Operations>
+<Risk Analysis, connectedTo, Homeland Security Planning>
+<Risk Analysis, connectedTo, Hostage Negotiation>
+<Risk Analysis, connectedTo, Information Sharing>
+<Risk Analysis, connectedTo, Intelligence Gathering>
+<Risk Analysis, connectedTo, Threat Assessment>
+<Threat Assessment, connectedTo, Drone Countermeasures>
+<Threat Assessment, connectedTo, Hostage Negotiation>
+<Threat Assessment, yes, Transportation Security>
+<Training Exercises, connectedTo, Homeland Security Planning>
+<Transportation Security, connectedTo, Behavioral Threat Assessment>
+<Transportation Security, partOf, Biometric Screening>
+<Vulnerability Assessment, connectedTo, Psychological Operations>
+<Vulnerability Assessment, partOf, Biometric Screening>
+<start, connectedTo, Hostage Negotiation>
+<start, connectedTo, Information Sharing>
+<start, connectedTo, Intelligence Gathering>
+<start, connectedTo, Port Security>
+<start, connectedTo, Risk Analysis>
+<start, connectedTo, Threat Assessment>
diff --git a/test/mermaid/hard/mermaid_306.txt b/test/mermaid/hard/mermaid_306.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7018574e6739dc66fae8ddb8f9a01f2f5951058a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_306.txt
@@ -0,0 +1,42 @@
+<Border Security, connectedTo, Fusion Center Operations>
+<Border Security, connectedTo, Intelligence Analysis>
+<Chemical Biological Radiological Nuclear Defense, connectedTo, Border Security>
+<Chemical Biological Radiological Nuclear Defense, connectedTo, Intelligence Analysis>
+<Chemical Biological Radiological Nuclear Defense, connectedTo, Terrorism Financing Interdiction>
+<Counter_Propaganda, connectedTo, Terrorism Financing Interdiction>
+<Counter_Propaganda, partOf, Biometric Screening>
+<Crisis Response Planning, connectedTo, Target Hardening>
+<Crisis Response Planning, partOf, Law Enforcement Operations>
+<Data Analytics for Terrorism, connectedTo, Legislation and Policy Development>
+<Data Analytics for Terrorism, connectedTo, Threat Assessment>
+<Emergency Preparedness, connectedTo, Threat Assessment>
+<Forensic Investigation of Attacks, connectedTo, Emergency Preparedness>
+<Fusion Center Operations, trains, Intelligence Analysis>
+<Information Sharing, connectedTo, Fusion Center Operations>
+<Information Sharing, partOf, Law Enforcement Operations>
+<Intelligence Analysis, connectedTo, Military Counterterrorism>
+<Intelligence Analysis, connectedTo, Risk Analysis>
+<Intelligence Analysis, connectedTo, Threat Assessment>
+<Legislation and Policy Development, connectedTo, Port Security>
+<Legislation and Policy Development, connectedTo, Threat Assessment>
+<Military Counterterrorism, connectedTo, Vulnerability Assessment>
+<Port Security, connectedTo, Emergency Preparedness>
+<Port Security, connectedTo, Forensic Investigation of Attacks>
+<Port Security, connectedTo, Threat Assessment>
+<Risk Analysis, connectedTo, Transportation Security>
+<Risk Analysis, partOf, Biometric Screening>
+<Risk_Based Security Measures, connectedTo, Border Security>
+<Risk_Based Security Measures, connectedTo, Chemical Biological Radiological Nuclear Defense>
+<Surveillance and Monitoring, connectedTo, Border Security>
+<Surveillance and Monitoring, connectedTo, Data Analytics for Terrorism>
+<Surveillance and Monitoring, connectedTo, Intelligence Analysis>
+<Surveillance and Monitoring, connectedTo, Risk_Based Security Measures>
+<Surveillance and Monitoring, connectedTo, Terrorism Financing Interdiction>
+<Target Hardening, detects, Information Sharing>
+<Target Hardening, partOf, Law Enforcement Operations>
+<Terrorism Financing Interdiction, connectedTo, Border Security>
+<Terrorism Financing Interdiction, connectedTo, Intelligence Analysis>
+<Transportation Security, connectedTo, Counter_Propaganda>
+<Transportation Security, partOf, Biometric Screening>
+<Vulnerability Assessment, connectedTo, Crisis Response Planning>
+<Vulnerability Assessment, connectedTo, Data Analytics for Terrorism>
diff --git a/test/mermaid/hard/mermaid_307.txt b/test/mermaid/hard/mermaid_307.txt
new file mode 100644
index 0000000000000000000000000000000000000000..55a0c2d8da3cddc1459ce88c71b53891ed5581bc
--- /dev/null
+++ b/test/mermaid/hard/mermaid_307.txt
@@ -0,0 +1,37 @@
+<Access Control Systems, connectedTo, Wildlife Tracking>
+<Anomaly Detection, connectedTo, Drone Surveillance>
+<Anomaly Detection, connectedTo, Remote Sensing>
+<Anomaly Detection, no, Real_time Alerts>
+<Audio Surveillance, connectedTo, Legal Compliance>
+<Audio Surveillance, partOf, Internet Traffic Monitoring>
+<Automated Threat Detection, connectedTo, Access Control Systems>
+<Automated Threat Detection, connectedTo, Biometric Data Analysis>
+<Automated Threat Detection, connectedTo, Mobile Phone Interception>
+<Automated Threat Detection, connectedTo, Wildlife Tracking>
+<Drone Surveillance, connectedTo, Access Control Systems>
+<Drone Surveillance, connectedTo, Network Monitoring>
+<Drone Surveillance, connectedTo, Real_time Alerts>
+<Industrial Surveillance, connectedTo, Anomaly Detection>
+<Industrial Surveillance, partOf, Predictive Policing>
+<Intrusion Detection, connectedTo, Perimeter Security>
+<Intrusion Detection, partOf, Internet Traffic Monitoring>
+<Legal Compliance, connectedTo, Intrusion Detection>
+<Legal Compliance, partOf, Internet Traffic Monitoring>
+<Mobile Phone Interception, connectedTo, Biometric Data Analysis>
+<Network Monitoring, connectedTo, Real_time Alerts>
+<Pattern Recognition, connectedTo, Industrial Surveillance>
+<Pattern Recognition, partOf, Predictive Policing>
+<Perimeter Security, connectedTo, Anomaly Detection>
+<Perimeter Security, connectedTo, Drone Surveillance>
+<Perimeter Security, connectedTo, Real_time Alerts>
+<Privacy Concerns Mitigation, connectedTo, Audio Surveillance>
+<Privacy Concerns Mitigation, partOf, Internet Traffic Monitoring>
+<Real_time Alerts, connectedTo, Automated Threat Detection>
+<Remote Sensing, connectedTo, Drone Surveillance>
+<Remote Sensing, connectedTo, Mobile Phone Interception>
+<Remote Sensing, connectedTo, Real_time Alerts>
+<Video Analytics, connectedTo, Mobile Phone Interception>
+<Video Analytics, connectedTo, Pattern Recognition>
+<Video Analytics, connectedTo, Privacy Concerns Mitigation>
+<Wildlife Tracking, connectedTo, Video Analytics>
+<start, connectedTo, Perimeter Security>
diff --git a/test/mermaid/hard/mermaid_308.mmd b/test/mermaid/hard/mermaid_308.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..41fea62cc55bfbc8049bac3c4febe72a6517cbbc
--- /dev/null
+++ b/test/mermaid/hard/mermaid_308.mmd
@@ -0,0 +1,98 @@
+graph LR
+    N0([start])
+    N1{GPS Tracking}
+    N2[Mobile Phone Interception]
+    N3([Thermal Imaging])
+    N4[(Physical Security Integration)]
+    N5[/Night Vision Technology/]
+    S0(( ))
+    S2(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Pattern Recognition
+        nest0_0{Industrial Surveillance}
+        nest0_1(Data Storage and Retention)
+        nest0_2[/Perimeter Security/]
+        nest0_3(Ethical Guidelines)
+    end
+    subgraph Biometric Data Analysis
+        nest1_0[(Privacy Concerns Mitigation)]
+        nest1_1[Real_time Alerts]
+        nest1_2{Legal Compliance}
+        nest1_3([Anomaly Detection])
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N3 -.-> nest0_0
+    nest0_3 --> N1
+    nest1_0 -.-> nest1_1
+    nest1_1 --> |monitors| nest1_2
+    nest1_2 -.-> nest1_3
+    N2 --> nest1_0
+    nest1_3 -.-> N2
+    N2 --> S0
+    S0 --> N4
+    S0 --> N5
+    N2 --> S2
+    S2 --> N4
+    S2 -.-> N5
+    N0 -.-> M1
+    N3 --> |privacy_protects| M1
+    N1 --> M1
+    M1 -.-> N5
+    N1 -.-> M2
+    N0 -.-> M2
+    M2 --> N3
+    style N0 fill:#E0F2F1,stroke:#26A69A
+    style N1 fill:#FFFAE0,stroke:#FFE470
+    style N2 fill:#FFFAE0,stroke:#FFE470
+    style N3 fill:#FFFAE0,stroke:#FFE470
+    style N4 fill:#E0F2F1,stroke:#26A69A
+    style N5 fill:#FFFAE0,stroke:#FFE470
+    style S0 fill:#E8F5E9,stroke:#66BB6A
+    style S2 fill:#E8F5E9,stroke:#66BB6A
+    style M1 fill:#FFFAE0,stroke:#FFE470
+    style M2 fill:#E0F2F1,stroke:#26A69A
+    style nest0_0 fill:#E8F5E9,stroke:#66BB6A
+    style nest0_1 fill:#E8F5E9,stroke:#66BB6A
+    style nest0_2 fill:#E0F2F1,stroke:#26A69A
+    style nest0_3 fill:#E0F2F1,stroke:#26A69A
+    style nest1_0 fill:#FFFAE0,stroke:#FFE470
+    style nest1_1 fill:#E8F5E9,stroke:#66BB6A
+    style nest1_2 fill:#E8F5E9,stroke:#66BB6A
+    style nest1_3 fill:#E0F2F1,stroke:#26A69A
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_308.txt b/test/mermaid/hard/mermaid_308.txt
new file mode 100644
index 0000000000000000000000000000000000000000..36ade7d4fbeb2c8ac03ed165b706dd318e41c995
--- /dev/null
+++ b/test/mermaid/hard/mermaid_308.txt
@@ -0,0 +1,30 @@
+<Anomaly Detection, connectedTo, Mobile Phone Interception>
+<Anomaly Detection, partOf, Biometric Data Analysis>
+<Data Storage and Retention, connectedTo, Perimeter Security>
+<Data Storage and Retention, partOf, Pattern Recognition>
+<Ethical Guidelines, connectedTo, GPS Tracking>
+<Ethical Guidelines, partOf, Pattern Recognition>
+<GPS Tracking, connectedTo, Mobile Phone Interception>
+<GPS Tracking, connectedTo, Night Vision Technology>
+<GPS Tracking, connectedTo, Thermal Imaging>
+<Industrial Surveillance, connectedTo, Data Storage and Retention>
+<Industrial Surveillance, partOf, Pattern Recognition>
+<Legal Compliance, connectedTo, Anomaly Detection>
+<Legal Compliance, partOf, Biometric Data Analysis>
+<Mobile Phone Interception, connectedTo, Night Vision Technology>
+<Mobile Phone Interception, connectedTo, Physical Security Integration>
+<Mobile Phone Interception, connectedTo, Privacy Concerns Mitigation>
+<Mobile Phone Interception, connectedTo, Thermal Imaging>
+<Perimeter Security, connectedTo, Ethical Guidelines>
+<Perimeter Security, partOf, Pattern Recognition>
+<Physical Security Integration, connectedTo, Night Vision Technology>
+<Privacy Concerns Mitigation, connectedTo, Real_time Alerts>
+<Privacy Concerns Mitigation, partOf, Biometric Data Analysis>
+<Real_time Alerts, monitors, Legal Compliance>
+<Real_time Alerts, partOf, Biometric Data Analysis>
+<Thermal Imaging, connectedTo, Industrial Surveillance>
+<Thermal Imaging, connectedTo, Physical Security Integration>
+<Thermal Imaging, privacy_protects, Night Vision Technology>
+<start, connectedTo, GPS Tracking>
+<start, connectedTo, Night Vision Technology>
+<start, connectedTo, Thermal Imaging>
diff --git a/test/mermaid/hard/mermaid_309.mmd b/test/mermaid/hard/mermaid_309.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..dba51d2bce6953240a046327f58fe64117cfa64f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_309.mmd
@@ -0,0 +1,104 @@
+graph LR
+    N0([start])
+    N1(Intrusion Detection)
+    N2(Environmental Monitoring)
+    N3{Real_time Alerts}
+    N4(Video Analytics)
+    N5[/Satellite Imaging/]
+    N6(Internet Traffic Monitoring)
+    N7{Remote Sensing}
+    N8[(Wildlife Tracking)]
+    N9[[Social Media Monitoring]]
+    N10([Automated Threat Detection])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Industrial Surveillance
+        nest0_0([Facial Recognition Systems])
+        nest0_1[Audio Surveillance]
+    end
+    subgraph Physical Security Integration
+        nest1_0(Night Vision Technology)
+        nest1_1([Asset Tracking])
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> |visualizes| N5
+    N5 --> |observes| N6
+    N6 --> N7
+    N7 --> |monitors| N8
+    N8 -.-> N9
+    N9 -.-> N10
+    nest0_0 --> nest0_1
+    N9 --> |optimizes| nest0_0
+    nest0_1 --> N3
+    nest1_0 --> nest1_1
+    N1 -.-> nest1_0
+    nest1_1 -.-> N9
+    N1 -.-> S0
+    S0 --> N5
+    S0 --> N10
+    N3 -.-> S1
+    S1 --> |complies| N8
+    S1 -.-> N7
+    N2 -.-> S2
+    S2 -.-> N6
+    S2 --> N10
+    S2 --> N5
+    N2 --> M1
+    N5 -.-> M1
+    N3 -.-> M1
+    M1 -.-> N7
+    style N0 fill:#DFE7EB,stroke:#B0C5CD
+    style N1 fill:#FFFCE6,stroke:#FFF9AE
+    style N2 fill:#FFFCE6,stroke:#FFF9AE
+    style N3 fill:#FFFCE6,stroke:#FFF9AE
+    style N4 fill:#DFE7EB,stroke:#B0C5CD
+    style N5 fill:#FFF9D4,stroke:#FFE69C
+    style N6 fill:#FFFCE6,stroke:#FFF9AE
+    style N7 fill:#DFE7EB,stroke:#B0C5CD
+    style N8 fill:#FFFCE6,stroke:#FFF9AE
+    style N9 fill:#FFF9D4,stroke:#FFE69C
+    style N10 fill:#DFE7EB,stroke:#B0C5CD
+    style S0 fill:#DFE7EB,stroke:#B0C5CD
+    style S1 fill:#DFE7EB,stroke:#B0C5CD
+    style S2 fill:#FFF9D4,stroke:#FFE69C
+    style M1 fill:#FFFCE6,stroke:#FFF9AE
+    style nest0_0 fill:#FFF9D4,stroke:#FFE69C
+    style nest0_1 fill:#FFF9D4,stroke:#FFE69C
+    style nest1_0 fill:#FFF9D4,stroke:#FFE69C
+    style nest1_1 fill:#FFF9D4,stroke:#FFE69C
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFE69C,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_309.txt b/test/mermaid/hard/mermaid_309.txt
new file mode 100644
index 0000000000000000000000000000000000000000..9c13ec4f2e490e0e28507dea0bdc55e3af1f99c5
--- /dev/null
+++ b/test/mermaid/hard/mermaid_309.txt
@@ -0,0 +1,29 @@
+<Asset Tracking, connectedTo, Social Media Monitoring>
+<Asset Tracking, partOf, Physical Security Integration>
+<Audio Surveillance, connectedTo, Real_time Alerts>
+<Audio Surveillance, partOf, Industrial Surveillance>
+<Environmental Monitoring, connectedTo, Automated Threat Detection>
+<Environmental Monitoring, connectedTo, Internet Traffic Monitoring>
+<Environmental Monitoring, connectedTo, Real_time Alerts>
+<Environmental Monitoring, connectedTo, Remote Sensing>
+<Environmental Monitoring, connectedTo, Satellite Imaging>
+<Facial Recognition Systems, connectedTo, Audio Surveillance>
+<Facial Recognition Systems, partOf, Industrial Surveillance>
+<Internet Traffic Monitoring, connectedTo, Remote Sensing>
+<Intrusion Detection, connectedTo, Automated Threat Detection>
+<Intrusion Detection, connectedTo, Environmental Monitoring>
+<Intrusion Detection, connectedTo, Night Vision Technology>
+<Intrusion Detection, connectedTo, Satellite Imaging>
+<Night Vision Technology, connectedTo, Asset Tracking>
+<Night Vision Technology, partOf, Physical Security Integration>
+<Real_time Alerts, complies, Wildlife Tracking>
+<Real_time Alerts, connectedTo, Remote Sensing>
+<Real_time Alerts, connectedTo, Video Analytics>
+<Remote Sensing, monitors, Wildlife Tracking>
+<Satellite Imaging, connectedTo, Remote Sensing>
+<Satellite Imaging, observes, Internet Traffic Monitoring>
+<Social Media Monitoring, connectedTo, Automated Threat Detection>
+<Social Media Monitoring, optimizes, Facial Recognition Systems>
+<Video Analytics, visualizes, Satellite Imaging>
+<Wildlife Tracking, connectedTo, Social Media Monitoring>
+<start, connectedTo, Intrusion Detection>
diff --git a/test/mermaid/hard/mermaid_31.mmd b/test/mermaid/hard/mermaid_31.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..09ffc0dd69e168ad876122600e5ac880dbce6395
--- /dev/null
+++ b/test/mermaid/hard/mermaid_31.mmd
@@ -0,0 +1,124 @@
+graph RL
+    N0([Water Level Measurement])
+    N1[[Forestry Management]]
+    N2(Storage)
+    N3(Seedling Transplanting)
+    N4[Equipment Repair]
+    N5[Disease Detection]
+    N6[(Fencing Installation)]
+    N7([Produce Sorting])
+    N8([Aquaculture Farming])
+    N9{Farm Maintenance}
+    N10(Automated Milking)
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Irrigation Scheduling
+        nest0_0[/Weather Tracking/]
+        nest0_1[(Hydroponic System Management)]
+        nest0_2[Traceability System]
+        nest0_3[Agricultural Research]
+    end
+    subgraph Market Transportation
+        nest1_0[(Crop Monitoring)]
+        nest1_1([Soil Testing])
+        nest1_2(Drone Scouting)
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> |sells| nest0_3
+    N5 --> nest0_0
+    nest0_3 -.-> N2
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N2 --> nest1_0
+    nest1_2 --> N5
+    N3 --> S0
+    S0 -.-> N7
+    S0 -.-> N8
+    S0 --> N9
+    N7 --> S1
+    S1 --> N10
+    S1 --> N9
+    N7 --> S2
+    S2 --> |tests| N10
+    S2 -.-> N9
+    N0 -.-> M0
+    N1 --> M0
+    M0 --> N3
+    N0 -.-> M1
+    N2 -.-> M1
+    N1 --> M1
+    M1 --> N4
+    style N0 fill:#E3F2FD,stroke:#64B5F6
+    style N1 fill:#F8FDD3,stroke:#D3EB9F
+    style N2 fill:#E3F2FD,stroke:#64B5F6
+    style N3 fill:#F8FDD3,stroke:#D3EB9F
+    style N4 fill:#F8FDD3,stroke:#D3EB9F
+    style N5 fill:#F8FDD3,stroke:#D3EB9F
+    style N6 fill:#E3F2FD,stroke:#64B5F6
+    style N7 fill:#F8FDD3,stroke:#D3EB9F
+    style N8 fill:#E3F2FD,stroke:#64B5F6
+    style N9 fill:#E3F2FD,stroke:#64B5F6
+    style N10 fill:#D3D7EB,stroke:#8C9EFF
+    style S0 fill:#E3F2FD,stroke:#64B5F6
+    style S1 fill:#E3F2FD,stroke:#64B5F6
+    style S2 fill:#F8FDD3,stroke:#D3EB9F
+    style M0 fill:#D3D7EB,stroke:#8C9EFF
+    style M1 fill:#F8FDD3,stroke:#D3EB9F
+    style nest0_0 fill:#D3D7EB,stroke:#8C9EFF
+    style nest0_1 fill:#F8FDD3,stroke:#D3EB9F
+    style nest0_2 fill:#D3D7EB,stroke:#8C9EFF
+    style nest0_3 fill:#F8FDD3,stroke:#D3EB9F
+    style nest1_0 fill:#F8FDD3,stroke:#D3EB9F
+    style nest1_1 fill:#D3D7EB,stroke:#8C9EFF
+    style nest1_2 fill:#F8FDD3,stroke:#D3EB9F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#64B5F6,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#D3EB9F,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_31.txt b/test/mermaid/hard/mermaid_31.txt
new file mode 100644
index 0000000000000000000000000000000000000000..164d4b8c3e03556420463370462c63e7f9322ae0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_31.txt
@@ -0,0 +1,37 @@
+<Agricultural Research, connectedTo, Storage>
+<Agricultural Research, partOf, Irrigation Scheduling>
+<Aquaculture Farming, connectedTo, Farm Maintenance>
+<Crop Monitoring, connectedTo, Soil Testing>
+<Crop Monitoring, partOf, Market Transportation>
+<Disease Detection, connectedTo, Fencing Installation>
+<Disease Detection, connectedTo, Weather Tracking>
+<Drone Scouting, connectedTo, Disease Detection>
+<Drone Scouting, partOf, Market Transportation>
+<Equipment Repair, connectedTo, Disease Detection>
+<Farm Maintenance, connectedTo, Automated Milking>
+<Fencing Installation, connectedTo, Produce Sorting>
+<Forestry Management, connectedTo, Equipment Repair>
+<Forestry Management, connectedTo, Seedling Transplanting>
+<Forestry Management, connectedTo, Storage>
+<Hydroponic System Management, connectedTo, Traceability System>
+<Hydroponic System Management, partOf, Irrigation Scheduling>
+<Produce Sorting, connectedTo, Aquaculture Farming>
+<Produce Sorting, connectedTo, Automated Milking>
+<Produce Sorting, connectedTo, Farm Maintenance>
+<Produce Sorting, tests, Automated Milking>
+<Seedling Transplanting, connectedTo, Aquaculture Farming>
+<Seedling Transplanting, connectedTo, Equipment Repair>
+<Seedling Transplanting, connectedTo, Farm Maintenance>
+<Seedling Transplanting, connectedTo, Produce Sorting>
+<Soil Testing, connectedTo, Drone Scouting>
+<Soil Testing, partOf, Market Transportation>
+<Storage, connectedTo, Crop Monitoring>
+<Storage, connectedTo, Equipment Repair>
+<Storage, connectedTo, Seedling Transplanting>
+<Traceability System, partOf, Irrigation Scheduling>
+<Traceability System, sells, Agricultural Research>
+<Water Level Measurement, connectedTo, Equipment Repair>
+<Water Level Measurement, connectedTo, Forestry Management>
+<Water Level Measurement, connectedTo, Seedling Transplanting>
+<Weather Tracking, connectedTo, Hydroponic System Management>
+<Weather Tracking, partOf, Irrigation Scheduling>
diff --git a/test/mermaid/hard/mermaid_310.mmd b/test/mermaid/hard/mermaid_310.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..2971b4ada6b7062ab93fc3837ca3a90b79d56a3e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_310.mmd
@@ -0,0 +1,138 @@
+graph BT
+    N0([start])
+    N1[Public Awareness Campaigns]
+    N2{Restorative Justice}
+    N3[/Police_Community Relations/]
+    N4(Domestic Violence Prevention)
+    N5[Mediation Services]
+    N6[Crime Prevention Through Education]
+    N7(Conflict Resolution Training)
+    N8[Hotspot Policing]
+    N9(Cybercrime Prevention)
+    N10(Law Enforcement Training)
+    N11[Youth Programs]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Gang Intervention
+        nest0_0[Patrol Operations]
+        nest0_1(Identity Theft Prevention)
+        nest0_2(Early Intervention Programs)
+    end
+    subgraph Target Hardening
+        nest1_0{Fraud Prevention}
+        nest1_1[/Crisis Intervention/]
+        nest1_2(Environmental Design)
+    end
+    N0 --> N1
+    N1 --> |certifies| N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N9 --> |communicates| nest0_0
+    nest0_2 -.-> N4
+    nest1_0 --> nest1_1
+    nest1_1 -.-> |hotspots| nest1_2
+    N8 --> nest1_0
+    nest1_2 --> |deters| N1
+    N5 --> S0
+    S0 -.-> N9
+    S0 -.-> N11
+    S0 --> N7
+    S0 -.-> N10
+    N1 -.-> S1
+    S1 --> N7
+    S1 -.-> |identifies_risks| N11
+    N3 -.-> S2
+    S2 --> |rehabilitates_offenders| N10
+    S2 -.-> N11
+    N3 --> M0
+    N2 --> |secures| M0
+    N1 --> M0
+    N0 -.-> M0
+    M0 --> N5
+    N1 -.-> M1
+    N0 -.-> M1
+    N3 --> M1
+    M1 --> N5
+    N0 -.-> M2
+    N1 --> M2
+    M2 --> N3
+    style N0 fill:#D0EFEE,stroke:#73C6BC
+    style N1 fill:#DDCEDD,stroke:#AF56A6
+    style N2 fill:#E1F5FE,stroke:#4FC3F7
+    style N3 fill:#D0EFEE,stroke:#73C6BC
+    style N4 fill:#D0EFEE,stroke:#73C6BC
+    style N5 fill:#DDCEDD,stroke:#AF56A6
+    style N6 fill:#E1F5FE,stroke:#4FC3F7
+    style N7 fill:#E1F5FE,stroke:#4FC3F7
+    style N8 fill:#E1F5FE,stroke:#4FC3F7
+    style N9 fill:#D0EFEE,stroke:#73C6BC
+    style N10 fill:#E1F5FE,stroke:#4FC3F7
+    style N11 fill:#DDCEDD,stroke:#AF56A6
+    style S0 fill:#DDCEDD,stroke:#AF56A6
+    style S1 fill:#DDCEDD,stroke:#AF56A6
+    style S2 fill:#D0EFEE,stroke:#73C6BC
+    style M0 fill:#E1F5FE,stroke:#4FC3F7
+    style M1 fill:#D0EFEE,stroke:#73C6BC
+    style M2 fill:#D0EFEE,stroke:#73C6BC
+    style nest0_0 fill:#E1F5FE,stroke:#4FC3F7
+    style nest0_1 fill:#DDCEDD,stroke:#AF56A6
+    style nest0_2 fill:#DDCEDD,stroke:#AF56A6
+    style nest1_0 fill:#D0EFEE,stroke:#73C6BC
+    style nest1_1 fill:#DDCEDD,stroke:#AF56A6
+    style nest1_2 fill:#E1F5FE,stroke:#4FC3F7
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#4FC3F7,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_310.txt b/test/mermaid/hard/mermaid_310.txt
new file mode 100644
index 0000000000000000000000000000000000000000..9fd0afcd16886aa771bc3f1a3bc8ca886bcfb45f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_310.txt
@@ -0,0 +1,39 @@
+<Conflict Resolution Training, connectedTo, Hotspot Policing>
+<Crime Prevention Through Education, connectedTo, Conflict Resolution Training>
+<Crisis Intervention, hotspots, Environmental Design>
+<Crisis Intervention, partOf, Target Hardening>
+<Cybercrime Prevention, communicates, Patrol Operations>
+<Cybercrime Prevention, connectedTo, Law Enforcement Training>
+<Domestic Violence Prevention, connectedTo, Mediation Services>
+<Early Intervention Programs, connectedTo, Domestic Violence Prevention>
+<Early Intervention Programs, partOf, Gang Intervention>
+<Environmental Design, deters, Public Awareness Campaigns>
+<Environmental Design, partOf, Target Hardening>
+<Fraud Prevention, connectedTo, Crisis Intervention>
+<Fraud Prevention, partOf, Target Hardening>
+<Hotspot Policing, connectedTo, Cybercrime Prevention>
+<Hotspot Policing, connectedTo, Fraud Prevention>
+<Identity Theft Prevention, connectedTo, Early Intervention Programs>
+<Identity Theft Prevention, partOf, Gang Intervention>
+<Law Enforcement Training, connectedTo, Youth Programs>
+<Mediation Services, connectedTo, Conflict Resolution Training>
+<Mediation Services, connectedTo, Crime Prevention Through Education>
+<Mediation Services, connectedTo, Cybercrime Prevention>
+<Mediation Services, connectedTo, Law Enforcement Training>
+<Mediation Services, connectedTo, Youth Programs>
+<Patrol Operations, connectedTo, Identity Theft Prevention>
+<Patrol Operations, partOf, Gang Intervention>
+<Police_Community Relations, connectedTo, Domestic Violence Prevention>
+<Police_Community Relations, connectedTo, Mediation Services>
+<Police_Community Relations, connectedTo, Youth Programs>
+<Police_Community Relations, rehabilitates_offenders, Law Enforcement Training>
+<Public Awareness Campaigns, certifies, Restorative Justice>
+<Public Awareness Campaigns, connectedTo, Conflict Resolution Training>
+<Public Awareness Campaigns, connectedTo, Mediation Services>
+<Public Awareness Campaigns, connectedTo, Police_Community Relations>
+<Public Awareness Campaigns, identifies_risks, Youth Programs>
+<Restorative Justice, connectedTo, Police_Community Relations>
+<Restorative Justice, secures, Mediation Services>
+<start, connectedTo, Mediation Services>
+<start, connectedTo, Police_Community Relations>
+<start, connectedTo, Public Awareness Campaigns>
diff --git a/test/mermaid/hard/mermaid_311.txt b/test/mermaid/hard/mermaid_311.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b3aae8fb9ac46bc8b8fee7056fb779fa060a19b5
--- /dev/null
+++ b/test/mermaid/hard/mermaid_311.txt
@@ -0,0 +1,41 @@
+<CCTV Installation, connectedTo, Mediation Services>
+<CCTV Installation, connectedTo, Restorative Justice>
+<Crisis Intervention, connectedTo, Neighborhood Watch Programs>
+<Cybercrime Prevention, connectedTo, Restorative Justice>
+<Cybercrime Prevention, partOf, Reintegration Programs>
+<Drug Prevention Initiatives, connectedTo, Crisis Intervention>
+<Early Intervention Programs, connectedTo, Hotspot Policing>
+<Early Intervention Programs, connectedTo, Restorative Justice>
+<Early Intervention Programs, connectedTo, Sexual Assault Prevention>
+<Early Intervention Programs, connectedTo, Target Hardening>
+<Fraud Prevention, connectedTo, Crisis Intervention>
+<Fraud Prevention, connectedTo, Drug Prevention Initiatives>
+<Fraud Prevention, connectedTo, Gang Intervention>
+<Fraud Prevention, connectedTo, Neighborhood Watch Programs>
+<Gang Intervention, connectedTo, Public Awareness Campaigns>
+<Hotspot Policing, connectedTo, Police_Community Relations>
+<Hotspot Policing, connectedTo, Restorative Justice>
+<Mediation Services, connectedTo, Drug Prevention Initiatives>
+<Mediation Services, connectedTo, Early Intervention Programs>
+<Neighborhood Watch Programs, connectedTo, Gang Intervention>
+<Police_Community Relations, connectedTo, Drug Prevention Initiatives>
+<Police_Community Relations, connectedTo, Fraud Prevention>
+<Police_Community Relations, connectedTo, Gang Intervention>
+<Police_Community Relations, connectedTo, Neighborhood Watch Programs>
+<Police_Community Relations, connectedTo, Public Awareness Campaigns>
+<Police_Community Relations, connectedTo, Restorative Justice>
+<Rehabilitation Programs, connectedTo, Youth Programs>
+<Rehabilitation Programs, partOf, Burglary Prevention>
+<Restorative Justice, connectedTo, Drug Prevention Initiatives>
+<Restorative Justice, connectedTo, Fraud Prevention>
+<School Safety Programs, connectedTo, Mediation Services>
+<School Safety Programs, partOf, Burglary Prevention>
+<Security Lighting, connectedTo, Cybercrime Prevention>
+<Security Lighting, partOf, Reintegration Programs>
+<Sexual Assault Prevention, connectedTo, Security Lighting>
+<Sexual Assault Prevention, partOf, Reintegration Programs>
+<Target Hardening, connectedTo, Rehabilitation Programs>
+<Target Hardening, partOf, Burglary Prevention>
+<Youth Programs, connectedTo, School Safety Programs>
+<Youth Programs, partOf, Burglary Prevention>
+<start, connectedTo, CCTV Installation>
diff --git a/test/mermaid/hard/mermaid_312.mmd b/test/mermaid/hard/mermaid_312.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..cd66e8dbeb1575bc6c34b091156820d824a0958b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_312.mmd
@@ -0,0 +1,132 @@
+graph BT
+    N0([start])
+    N1[[Fraud Prevention]]
+    N2([Reintegration Programs])
+    N3[(Law Enforcement Training)]
+    N4(Crisis Intervention)
+    N5[Hotspot Policing]
+    N6(Public Awareness Campaigns)
+    N7{Burglary Prevention}
+    N8[Early Intervention Programs]
+    N9(Environmental Design)
+    N10[(Conflict Resolution Training)]
+    N11[[Target Hardening]]
+    N12(Identity Theft Prevention)
+    N13([Security Lighting])
+    N14([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    subgraph Gang Intervention
+        nest0_0([Sexual Assault Prevention])
+        nest0_1[[Vehicle Theft Prevention]]
+    end
+    subgraph Drug Prevention Initiatives
+        nest1_0[[Rehabilitation Programs]]
+        nest1_1{Cybercrime Prevention}
+        nest1_2[(Crime Prevention Through Education)]
+        nest1_3[/Victim Support Services/]
+    end
+    N0 -.-> |models| N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> |monitors| N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> |deters| N12
+    N12 -.-> N13
+    N13 -.-> N14
+    nest0_0 --> nest0_1
+    N10 -.-> nest0_0
+    nest0_1 -.-> N14
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> |collaborates| nest1_3
+    N7 -.-> nest1_0
+    nest1_3 --> N1
+    N9 -.-> S0
+    S0 --> N14
+    S0 --> |audits| N13
+    N4 --> S1
+    S1 --> N7
+    S1 --> N9
+    S1 -.-> |community_engages| N12
+    S1 --> N6
+    N6 --> S2
+    S2 --> N14
+    S2 -.-> N13
+    S2 --> N8
+    S2 --> |reduces| N10
+    N4 -.-> M0
+    N3 -.-> M0
+    M0 -.-> N6
+    style N0 fill:#E0F7FA,stroke:#00BCD4
+    style N1 fill:#E0F7FA,stroke:#00BCD4
+    style N2 fill:#E0F7FA,stroke:#00BCD4
+    style N3 fill:#FFF9C4,stroke:#FFEB3B
+    style N4 fill:#FFF9C4,stroke:#FFEB3B
+    style N5 fill:#E0F2F1,stroke:#26A69A
+    style N6 fill:#FFF9C4,stroke:#FFEB3B
+    style N7 fill:#E0F7FA,stroke:#00BCD4
+    style N8 fill:#E0F2F1,stroke:#26A69A
+    style N9 fill:#FFF9C4,stroke:#FFEB3B
+    style N10 fill:#E0F2F1,stroke:#26A69A
+    style N11 fill:#E0F2F1,stroke:#26A69A
+    style N12 fill:#FFF9C4,stroke:#FFEB3B
+    style N13 fill:#E0F7FA,stroke:#00BCD4
+    style N14 fill:#E0F7FA,stroke:#00BCD4
+    style S0 fill:#E0F2F1,stroke:#26A69A
+    style S1 fill:#FFF9C4,stroke:#FFEB3B
+    style S2 fill:#E0F7FA,stroke:#00BCD4
+    style M0 fill:#E0F2F1,stroke:#26A69A
+    style nest0_0 fill:#E0F7FA,stroke:#00BCD4
+    style nest0_1 fill:#FFF9C4,stroke:#FFEB3B
+    style nest1_0 fill:#E0F2F1,stroke:#26A69A
+    style nest1_1 fill:#FFF9C4,stroke:#FFEB3B
+    style nest1_2 fill:#E0F7FA,stroke:#00BCD4
+    style nest1_3 fill:#FFF9C4,stroke:#FFEB3B
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_312.txt b/test/mermaid/hard/mermaid_312.txt
new file mode 100644
index 0000000000000000000000000000000000000000..36019951a2f3a4706c79e03ce21230f0030fe7c4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_312.txt
@@ -0,0 +1,39 @@
+<Burglary Prevention, connectedTo, Early Intervention Programs>
+<Burglary Prevention, connectedTo, Rehabilitation Programs>
+<Conflict Resolution Training, connectedTo, Sexual Assault Prevention>
+<Conflict Resolution Training, connectedTo, Target Hardening>
+<Crime Prevention Through Education, collaborates, Victim Support Services>
+<Crime Prevention Through Education, partOf, Drug Prevention Initiatives>
+<Crisis Intervention, community_engages, Identity Theft Prevention>
+<Crisis Intervention, connectedTo, Burglary Prevention>
+<Crisis Intervention, connectedTo, Environmental Design>
+<Crisis Intervention, connectedTo, Hotspot Policing>
+<Crisis Intervention, connectedTo, Public Awareness Campaigns>
+<Cybercrime Prevention, connectedTo, Crime Prevention Through Education>
+<Cybercrime Prevention, partOf, Drug Prevention Initiatives>
+<Early Intervention Programs, connectedTo, Environmental Design>
+<Environmental Design, audits, Security Lighting>
+<Environmental Design, connectedTo, Conflict Resolution Training>
+<Environmental Design, connectedTo, end>
+<Fraud Prevention, connectedTo, Reintegration Programs>
+<Hotspot Policing, connectedTo, Public Awareness Campaigns>
+<Identity Theft Prevention, connectedTo, Security Lighting>
+<Law Enforcement Training, connectedTo, Crisis Intervention>
+<Law Enforcement Training, connectedTo, Public Awareness Campaigns>
+<Public Awareness Campaigns, connectedTo, Early Intervention Programs>
+<Public Awareness Campaigns, connectedTo, Security Lighting>
+<Public Awareness Campaigns, connectedTo, end>
+<Public Awareness Campaigns, monitors, Burglary Prevention>
+<Public Awareness Campaigns, reduces, Conflict Resolution Training>
+<Rehabilitation Programs, connectedTo, Cybercrime Prevention>
+<Rehabilitation Programs, partOf, Drug Prevention Initiatives>
+<Reintegration Programs, connectedTo, Law Enforcement Training>
+<Security Lighting, connectedTo, end>
+<Sexual Assault Prevention, connectedTo, Vehicle Theft Prevention>
+<Sexual Assault Prevention, partOf, Gang Intervention>
+<Target Hardening, deters, Identity Theft Prevention>
+<Vehicle Theft Prevention, connectedTo, end>
+<Vehicle Theft Prevention, partOf, Gang Intervention>
+<Victim Support Services, connectedTo, Fraud Prevention>
+<Victim Support Services, partOf, Drug Prevention Initiatives>
+<start, models, Fraud Prevention>
diff --git a/test/mermaid/hard/mermaid_313.mmd b/test/mermaid/hard/mermaid_313.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..c51254514ad1712d192373c5edd73366ec5f5650
--- /dev/null
+++ b/test/mermaid/hard/mermaid_313.mmd
@@ -0,0 +1,102 @@
+graph TD
+    N0([GIS Mapping for Habitats])
+    N1[/Remote Sensing for Conservation/]
+    N2[Protected Area Management]
+    N3[Population Dynamics Study]
+    N4[[Invasive Species Control]]
+    N5[Camera Trap Deployment]
+    N6(Marine Conservation)
+    N7([Policy Advocacy])
+    N8(Freshwater Conservation)
+    N9{Grassland Conservation}
+    N10{Carbon Sequestration in Habitats}
+    N11[/Captive Breeding Programs/]
+    S0(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Drone_based Monitoring
+        nest0_0[[Translocation of Species]]
+        nest0_1[[Data Management for Conservation]]
+    end
+    subgraph Ecological Survey
+        nest1_0[Wetland Restoration]
+        nest1_1[(Ecotourism Management)]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> |warns| N10
+    N10 --> N11
+    nest0_0 --> nest0_1
+    N3 -.-> |partners| nest0_0
+    nest0_1 --> |researches| N9
+    nest1_0 -.-> nest1_1
+    N8 -.-> nest1_0
+    nest1_1 --> |community_engages| N4
+    N3 --> S0
+    S0 --> N6
+    S0 -.-> N11
+    S0 --> N10
+    N4 -.-> M0
+    N3 -.-> M0
+    N0 --> M0
+    M0 -.-> N6
+    N3 -.-> |alerts| M2
+    N2 -.-> |habitats_preserves| M2
+    N6 --> M2
+    M2 -.-> N8
+    style N0 fill:#E8EAF6,stroke:#5C6BC0
+    style N1 fill:#C9EFEC,stroke:#6FE1D5
+    style N2 fill:#E8EAF6,stroke:#5C6BC0
+    style N3 fill:#E8EAF6,stroke:#5C6BC0
+    style N4 fill:#FFF9C4,stroke:#FFEB3B
+    style N5 fill:#E8EAF6,stroke:#5C6BC0
+    style N6 fill:#FFF9C4,stroke:#FFEB3B
+    style N7 fill:#E8EAF6,stroke:#5C6BC0
+    style N8 fill:#FFF9C4,stroke:#FFEB3B
+    style N9 fill:#E8EAF6,stroke:#5C6BC0
+    style N10 fill:#C9EFEC,stroke:#6FE1D5
+    style N11 fill:#E8EAF6,stroke:#5C6BC0
+    style S0 fill:#FFF9C4,stroke:#FFEB3B
+    style M0 fill:#FFF9C4,stroke:#FFEB3B
+    style M2 fill:#E8EAF6,stroke:#5C6BC0
+    style nest0_0 fill:#C9EFEC,stroke:#6FE1D5
+    style nest0_1 fill:#E8EAF6,stroke:#5C6BC0
+    style nest1_0 fill:#FFF9C4,stroke:#FFEB3B
+    style nest1_1 fill:#E8EAF6,stroke:#5C6BC0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_313.txt b/test/mermaid/hard/mermaid_313.txt
new file mode 100644
index 0000000000000000000000000000000000000000..65466bdabe44ed676397534578b0e5a642a4734d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_313.txt
@@ -0,0 +1,29 @@
+<Camera Trap Deployment, connectedTo, Marine Conservation>
+<Carbon Sequestration in Habitats, connectedTo, Captive Breeding Programs>
+<Data Management for Conservation, partOf, Drone_based Monitoring>
+<Data Management for Conservation, researches, Grassland Conservation>
+<Ecotourism Management, community_engages, Invasive Species Control>
+<Ecotourism Management, partOf, Ecological Survey>
+<Freshwater Conservation, connectedTo, Grassland Conservation>
+<Freshwater Conservation, connectedTo, Wetland Restoration>
+<GIS Mapping for Habitats, connectedTo, Marine Conservation>
+<GIS Mapping for Habitats, connectedTo, Remote Sensing for Conservation>
+<Grassland Conservation, warns, Carbon Sequestration in Habitats>
+<Invasive Species Control, connectedTo, Camera Trap Deployment>
+<Invasive Species Control, connectedTo, Marine Conservation>
+<Marine Conservation, connectedTo, Freshwater Conservation>
+<Marine Conservation, connectedTo, Policy Advocacy>
+<Policy Advocacy, connectedTo, Freshwater Conservation>
+<Population Dynamics Study, alerts, Freshwater Conservation>
+<Population Dynamics Study, connectedTo, Captive Breeding Programs>
+<Population Dynamics Study, connectedTo, Carbon Sequestration in Habitats>
+<Population Dynamics Study, connectedTo, Invasive Species Control>
+<Population Dynamics Study, connectedTo, Marine Conservation>
+<Population Dynamics Study, partners, Translocation of Species>
+<Protected Area Management, connectedTo, Population Dynamics Study>
+<Protected Area Management, habitats_preserves, Freshwater Conservation>
+<Remote Sensing for Conservation, connectedTo, Protected Area Management>
+<Translocation of Species, connectedTo, Data Management for Conservation>
+<Translocation of Species, partOf, Drone_based Monitoring>
+<Wetland Restoration, connectedTo, Ecotourism Management>
+<Wetland Restoration, partOf, Ecological Survey>
diff --git a/test/mermaid/hard/mermaid_314.txt b/test/mermaid/hard/mermaid_314.txt
new file mode 100644
index 0000000000000000000000000000000000000000..66f579acef6a3eb1f0bc01b99da45b7dc9d46750
--- /dev/null
+++ b/test/mermaid/hard/mermaid_314.txt
@@ -0,0 +1,41 @@
+<Anti_Poaching Operations, connectedTo, Carbon Sequestration in Habitats>
+<Anti_Poaching Operations, connectedTo, Policy Advocacy>
+<Anti_Poaching Operations, connectedTo, Satellite Tracking of Animals>
+<Anti_Poaching Operations, connectedTo, Wetland Restoration>
+<Carbon Sequestration in Habitats, connectedTo, Climate Change Adaptation for Wildlife>
+<Carbon Sequestration in Habitats, connectedTo, Grassland Conservation>
+<Carbon Sequestration in Habitats, connectedTo, Policy Advocacy>
+<Carbon Sequestration in Habitats, connectedTo, Satellite Tracking of Animals>
+<Climate Change Adaptation for Wildlife, connectedTo, Satellite Tracking of Animals>
+<Data Management for Conservation, connectedTo, Ecological Survey>
+<Data Management for Conservation, warns, Satellite Tracking of Animals>
+<Ecological Survey, connectedTo, Policy Advocacy>
+<Ecological Survey, invasive_removes, Sustainable Resource Management>
+<GIS Mapping for Habitats, connectedTo, Translocation of Species>
+<GIS Mapping for Habitats, partOf, Ecotourism Management>
+<Habitat Restoration, connectedTo, Marine Conservation>
+<Habitat Restoration, partOf, Captive Breeding Programs>
+<Human_Wildlife Conflict Mitigation, connectedTo, Policy Advocacy>
+<Human_Wildlife Conflict Mitigation, partOf, Ecotourism Management>
+<International Treaties Enforcement, connectedTo, Anti_Poaching Operations>
+<International Treaties Enforcement, connectedTo, Grassland Conservation>
+<International Treaties Enforcement, connectedTo, Rewilding Initiatives>
+<International Treaties Enforcement, connectedTo, Satellite Tracking of Animals>
+<Marine Conservation, connectedTo, Species Monitoring>
+<Marine Conservation, partOf, Captive Breeding Programs>
+<Policy Advocacy, connectedTo, Grassland Conservation>
+<Rewilding Initiatives, partOf, Captive Breeding Programs>
+<Rewilding Initiatives, rescues, Habitat Restoration>
+<Satellite Tracking of Animals, connectedTo, Policy Advocacy>
+<Species Monitoring, connectedTo, Ecological Survey>
+<Species Monitoring, partOf, Captive Breeding Programs>
+<Sustainable Resource Management, connectedTo, International Treaties Enforcement>
+<Sustainable Resource Management, connectedTo, Policy Advocacy>
+<Translocation of Species, connectedTo, Human_Wildlife Conflict Mitigation>
+<Translocation of Species, partOf, Ecotourism Management>
+<Wetland Restoration, connectedTo, Carbon Sequestration in Habitats>
+<Wetland Restoration, connectedTo, Climate Change Adaptation for Wildlife>
+<Wetland Restoration, connectedTo, GIS Mapping for Habitats>
+<Wetland Restoration, connectedTo, Grassland Conservation>
+<Wetland Restoration, connectedTo, Policy Advocacy>
+<Wetland Restoration, connectedTo, Satellite Tracking of Animals>
diff --git a/test/mermaid/hard/mermaid_315.mmd b/test/mermaid/hard/mermaid_315.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..02bd73fbd857700221371019c601b7bba7f41e75
--- /dev/null
+++ b/test/mermaid/hard/mermaid_315.mmd
@@ -0,0 +1,102 @@
+graph BT
+    N0([Reintroduction Programs])
+    N1{Species Monitoring}
+    N2([Genetic Diversity Analysis])
+    N3[Fundraising for Conservation]
+    N4[/Law Enforcement/]
+    N5([Carbon Sequestration in Habitats])
+    N6([Drone_based Monitoring])
+    N7[[Community Engagement]]
+    N8[Sustainable Resource Management]
+    N9[(Satellite Tracking of Animals)]
+    S0(( ))
+    S2(( ))
+    M0(( ))
+    M2(( ))
+    subgraph GIS Mapping for Habitats
+        nest0_0([Protected Area Management])
+        nest0_1[Habitat Restoration]
+    end
+    subgraph Anti_Poaching Operations
+        nest1_0(Data Management for Conservation)
+        nest1_1{Wildlife Rescue and Rehabilitation}
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> |climate_adapts| N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    nest0_0 --> |translocates| nest0_1
+    N6 -.-> nest0_0
+    nest0_1 --> N2
+    nest1_0 -.-> nest1_1
+    N2 -.-> |protects| nest1_0
+    nest1_1 --> N5
+    N3 --> S0
+    S0 --> N7
+    S0 --> N8
+    S0 -.-> |funds_raises| N9
+    N4 -.-> S2
+    S2 --> N6
+    S2 -.-> N8
+    N1 -.-> |eco_tourism_promotes| M0
+    N0 -.-> M0
+    N2 -.-> M0
+    M0 --> N4
+    N1 -.-> M2
+    N6 -.-> M2
+    N2 --> M2
+    M2 --> N8
+    style N0 fill:#E0E6E9,stroke:#AABEC6
+    style N1 fill:#EFEBE9,stroke:#A1887F
+    style N2 fill:#E0E6E9,stroke:#AABEC6
+    style N3 fill:#E0E6E9,stroke:#AABEC6
+    style N4 fill:#EFEBE9,stroke:#A1887F
+    style N5 fill:#E0E6E9,stroke:#AABEC6
+    style N6 fill:#C9EFEC,stroke:#6FE1D5
+    style N7 fill:#E0E6E9,stroke:#AABEC6
+    style N8 fill:#C9EFEC,stroke:#6FE1D5
+    style N9 fill:#E0E6E9,stroke:#AABEC6
+    style S0 fill:#C9EFEC,stroke:#6FE1D5
+    style S2 fill:#C9EFEC,stroke:#6FE1D5
+    style M0 fill:#EFEBE9,stroke:#A1887F
+    style M2 fill:#E0E6E9,stroke:#AABEC6
+    style nest0_0 fill:#E0E6E9,stroke:#AABEC6
+    style nest0_1 fill:#EFEBE9,stroke:#A1887F
+    style nest1_0 fill:#EFEBE9,stroke:#A1887F
+    style nest1_1 fill:#EFEBE9,stroke:#A1887F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_316.txt b/test/mermaid/hard/mermaid_316.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c31d874085b0ddf783a3b50a70e2667e27366695
--- /dev/null
+++ b/test/mermaid/hard/mermaid_316.txt
@@ -0,0 +1,45 @@
+<Biological Oceanography, connectedTo, Ocean Modeling>
+<Buoy Deployment, partOf, Marine Life Observation>
+<Buoy Deployment, reports, Coastal Zone Management>
+<Coastal Zone Management, connectedTo, Marine Hazards Assessment>
+<Coastal Zone Management, partOf, Marine Life Observation>
+<Coral Reef Monitoring, connectedTo, Plastic Pollution Research>
+<Coral Reef Monitoring, partOf, Ocean Data Archiving>
+<Data Visualization, connectedTo, Hydrothermal Vent Exploration>
+<Deep_Sea Exploration, connectedTo, Ocean Temperature Sensing>
+<Fisheries Management, connectedTo, Underwater Acoustics>
+<Hydrothermal Vent Exploration, connectedTo, Deep_Sea Exploration>
+<Hydrothermal Vent Exploration, connectedTo, Fisheries Management>
+<Hydrothermal Vent Exploration, connectedTo, Marine Geology>
+<Hydrothermal Vent Exploration, connectedTo, Ocean Floor Mapping>
+<Hydrothermal Vent Exploration, connectedTo, Seabed Resource Exploration>
+<Hydrothermal Vent Exploration, connectedTo, Underwater Acoustics>
+<Hydrothermal Vent Exploration, processes_images, Ocean Floor Mapping>
+<Marine Geology, connectedTo, Deep_Sea Exploration>
+<Marine Geology, connectedTo, Marine Protected Area Planning>
+<Marine Hazards Assessment, connectedTo, Polar Oceanography>
+<Marine Protected Area Planning, connectedTo, Marine Hazards Assessment>
+<Ocean Acidification Research, connectedTo, Ocean Drilling Programs>
+<Ocean Acidification Research, partOf, Ocean Data Archiving>
+<Ocean Drilling Programs, connectedTo, Coral Reef Monitoring>
+<Ocean Drilling Programs, partOf, Ocean Data Archiving>
+<Ocean Floor Mapping, connectedTo, Sediment Analysis>
+<Ocean Floor Mapping, monitors, Marine Protected Area Planning>
+<Ocean Modeling, connectedTo, Climate Change Impact Study>
+<Ocean Modeling, connectedTo, Marine Hazards Assessment>
+<Ocean Modeling, connectedTo, Marine Protected Area Planning>
+<Ocean Modeling, connectedTo, Ocean Acidification Research>
+<Ocean Modeling, connectedTo, Seabed Resource Exploration>
+<Ocean Temperature Sensing, connectedTo, Climate Change Impact Study>
+<Ocean Temperature Sensing, connectedTo, Fisheries Management>
+<Ocean Temperature Sensing, connectedTo, Marine Protected Area Planning>
+<Ocean Temperature Sensing, connectedTo, Satellite Oceanography>
+<Plastic Pollution Research, connectedTo, Ocean Floor Mapping>
+<Plastic Pollution Research, partOf, Ocean Data Archiving>
+<Polar Oceanography, connectedTo, Climate Change Impact Study>
+<Satellite Oceanography, deploys_sensors, Buoy Deployment>
+<Satellite Oceanography, partOf, Marine Life Observation>
+<Seabed Resource Exploration, develops_instruments, Marine Protected Area Planning>
+<Sediment Analysis, connectedTo, Biological Oceanography>
+<Underwater Acoustics, connectedTo, Climate Change Impact Study>
+<Underwater Acoustics, connectedTo, Ocean Floor Mapping>
diff --git a/test/mermaid/hard/mermaid_317.mmd b/test/mermaid/hard/mermaid_317.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..3926fbe87c7788777683b293bb16a5281a421842
--- /dev/null
+++ b/test/mermaid/hard/mermaid_317.mmd
@@ -0,0 +1,148 @@
+graph RL
+    N0([Hydrothermal Vent Exploration])
+    N1([Coastal Erosion Research])
+    N2[(Buoy Deployment)]
+    N3[/Tsunami Prediction/]
+    N4[(Ocean Data Archiving)]
+    N5{Plastic Pollution Research}
+    N6([Coral Reef Monitoring])
+    N7(Acoustic Oceanography)
+    N8[Ocean Modeling]
+    N9[[Marine Hazards Assessment]]
+    N10([Fisheries Management])
+    N11[[Marine Pollution Monitoring]]
+    N12[[Chemical Oceanography]]
+    N13[(Marine Ecosystem Health)]
+    N14[(Sediment Analysis)]
+    N15[/Marine Protected Area Planning/]
+    N16([Physical Oceanography])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Marine Biodiversity Assessment
+        nest0_0[Climate Change Impact Study]
+        nest0_1{Ocean Temperature Sensing}
+        nest0_2[Ocean Acidification Research]
+    end
+    subgraph Ocean Floor Mapping
+        nest1_0(Ocean Current Measurement)
+        nest1_1[Salinity Measurement]
+        nest1_2[(Satellite Oceanography)]
+        nest1_3[/Ocean Carbon Cycle/]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    N15 --> N16
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N14 -.-> nest0_0
+    nest0_2 --> N9
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> nest1_3
+    N1 -.-> nest1_0
+    nest1_3 -.-> N12
+    N6 --> S0
+    S0 --> N8
+    S0 --> N9
+    S0 -.-> N16
+    N6 --> S1
+    S1 -.-> N11
+    S1 --> N15
+    S1 -.-> N9
+    N5 -.-> M0
+    N3 --> M0
+    N9 --> M0
+    N4 -.-> M0
+    M0 -.-> N11
+    N1 -.-> M1
+    N3 -.-> M1
+    N2 --> M1
+    N0 -.-> M1
+    M1 -.-> N5
+    style N0 fill:#FFF8E1,stroke:#FFD54F
+    style N1 fill:#FFF8E1,stroke:#FFD54F
+    style N2 fill:#FFF8E1,stroke:#FFD54F
+    style N3 fill:#FFF8E1,stroke:#FFD54F
+    style N4 fill:#DFE7EB,stroke:#B0C5CD
+    style N5 fill:#FFF8E1,stroke:#FFD54F
+    style N6 fill:#DFE7EB,stroke:#B0C5CD
+    style N7 fill:#DFE7EB,stroke:#B0C5CD
+    style N8 fill:#DFE7EB,stroke:#B0C5CD
+    style N9 fill:#FFF8E1,stroke:#FFD54F
+    style N10 fill:#DFE7EB,stroke:#B0C5CD
+    style N11 fill:#DFE7EB,stroke:#B0C5CD
+    style N12 fill:#DFE7EB,stroke:#B0C5CD
+    style N13 fill:#EFE6FF,stroke:#C2B2F0
+    style N14 fill:#FFF8E1,stroke:#FFD54F
+    style N15 fill:#DFE7EB,stroke:#B0C5CD
+    style N16 fill:#FFF8E1,stroke:#FFD54F
+    style S0 fill:#FFF8E1,stroke:#FFD54F
+    style S1 fill:#DFE7EB,stroke:#B0C5CD
+    style M0 fill:#EFE6FF,stroke:#C2B2F0
+    style M1 fill:#FFF8E1,stroke:#FFD54F
+    style nest0_0 fill:#FFF8E1,stroke:#FFD54F
+    style nest0_1 fill:#EFE6FF,stroke:#C2B2F0
+    style nest0_2 fill:#FFF8E1,stroke:#FFD54F
+    style nest1_0 fill:#DFE7EB,stroke:#B0C5CD
+    style nest1_1 fill:#FFF8E1,stroke:#FFD54F
+    style nest1_2 fill:#DFE7EB,stroke:#B0C5CD
+    style nest1_3 fill:#FFF8E1,stroke:#FFD54F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#B0C5CD,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_318.mmd b/test/mermaid/hard/mermaid_318.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..041f9e2c4ced043f7fc7d8d9a10039235b4a68a0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_318.mmd
@@ -0,0 +1,138 @@
+graph RL
+    N0([start])
+    N1([Fisheries Management])
+    N2(Salinity Measurement)
+    N3[/Marine Life Observation/]
+    N4{Biological Oceanography}
+    N5[Satellite Oceanography]
+    N6[Marine Biodiversity Assessment]
+    N7[[Ocean Floor Mapping]]
+    N8(Underwater Acoustics)
+    N9{Ocean Acidification Research}
+    N10([Plastic Pollution Research])
+    N11[[Coral Reef Monitoring]]
+    N12[/Ocean Carbon Cycle/]
+    N13[[Acoustic Oceanography]]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Marine Pollution Monitoring
+        nest0_0([Data Visualization])
+        nest0_1[Coastal Zone Management]
+        nest0_2(Deep_Sea Exploration)
+    end
+    subgraph Marine Hazards Assessment
+        nest1_0[/Sediment Analysis/]
+        nest1_1[(Ocean Data Archiving)]
+        nest1_2{Polar Oceanography}
+        nest1_3(Ocean Drilling Programs)
+    end
+    N0 -.-> |analyzes_data| N1
+    N1 --> N2
+    N2 --> |maintains_buoys| N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 -.-> N13
+    nest0_0 --> |measures| nest0_1
+    nest0_1 --> nest0_2
+    N3 --> |operates_ROVs| nest0_0
+    nest0_2 --> N5
+    nest1_0 -.-> |simulates| nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N2 --> nest1_0
+    nest1_3 --> N13
+    N6 -.-> S0
+    S0 --> N8
+    S0 --> N13
+    S0 --> N12
+    N6 -.-> S1
+    S1 -.-> N13
+    S1 -.-> N11
+    S1 -.-> |waves| N9
+    N9 --> S2
+    S2 -.-> N11
+    S2 --> N12
+    N1 -.-> M1
+    N8 -.-> M1
+    N2 --> M1
+    M1 --> N11
+    N1 --> |charts| M2
+    N0 --> M2
+    M2 --> N5
+    style N0 fill:#CFD8DC,stroke:#607D8B
+    style N1 fill:#CFD8DC,stroke:#607D8B
+    style N2 fill:#D3F7F9,stroke:#80DDEA
+    style N3 fill:#B2EBF2,stroke:#00BCD4
+    style N4 fill:#B2EBF2,stroke:#00BCD4
+    style N5 fill:#CFD8DC,stroke:#607D8B
+    style N6 fill:#CFD8DC,stroke:#607D8B
+    style N7 fill:#D3F7F9,stroke:#80DDEA
+    style N8 fill:#CFD8DC,stroke:#607D8B
+    style N9 fill:#B2EBF2,stroke:#00BCD4
+    style N10 fill:#B2EBF2,stroke:#00BCD4
+    style N11 fill:#CFD8DC,stroke:#607D8B
+    style N12 fill:#CFD8DC,stroke:#607D8B
+    style N13 fill:#CFD8DC,stroke:#607D8B
+    style S0 fill:#D3F7F9,stroke:#80DDEA
+    style S1 fill:#CFD8DC,stroke:#607D8B
+    style S2 fill:#CFD8DC,stroke:#607D8B
+    style M1 fill:#B2EBF2,stroke:#00BCD4
+    style M2 fill:#D3F7F9,stroke:#80DDEA
+    style nest0_0 fill:#B2EBF2,stroke:#00BCD4
+    style nest0_1 fill:#B2EBF2,stroke:#00BCD4
+    style nest0_2 fill:#B2EBF2,stroke:#00BCD4
+    style nest1_0 fill:#D3F7F9,stroke:#80DDEA
+    style nest1_1 fill:#B2EBF2,stroke:#00BCD4
+    style nest1_2 fill:#D3F7F9,stroke:#80DDEA
+    style nest1_3 fill:#D3F7F9,stroke:#80DDEA
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#80DDEA,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_319.txt b/test/mermaid/hard/mermaid_319.txt
new file mode 100644
index 0000000000000000000000000000000000000000..991430558ce03133cc52b06ee467e3084dea5062
--- /dev/null
+++ b/test/mermaid/hard/mermaid_319.txt
@@ -0,0 +1,27 @@
+<Building Code Development, connectedTo, Data Archiving and Distribution>
+<Building Code Development, connectedTo, Seismic Risk Mitigation>
+<Data Archiving and Distribution, connectedTo, Ground Motion Prediction>
+<Data Archiving and Distribution, partOf, Strong Motion Instrumentation>
+<Earthquake Early Warning Systems, connectedTo, Building Code Development>
+<Earthquake Early Warning Systems, connectedTo, Earthquake Prediction Research>
+<Earthquake Early Warning Systems, connectedTo, Seismic Risk Mitigation>
+<Earthquake Early Warning Systems, connectedTo, Tectonic Plate Movement Monitoring>
+<Earthquake Prediction Research, connectedTo, Building Code Development>
+<Epicenter Location, connectedTo, Seismic Network Operations>
+<Ground Motion Prediction, connectedTo, Volcanic Seismology>
+<Ground Motion Prediction, partOf, Strong Motion Instrumentation>
+<Planetary Seismology, connectedTo, Epicenter Location>
+<Planetary Seismology, partOf, Nuclear Test Monitoring>
+<Seismic Data Processing, connectedTo, Planetary Seismology>
+<Seismic Data Processing, partOf, Nuclear Test Monitoring>
+<Seismic Network Operations, connectedTo, Geophysical Exploration>
+<Seismic Risk Mitigation, connectedTo, Subsurface Imaging>
+<Seismic Risk Mitigation, connectedTo, Tectonic Plate Movement Monitoring>
+<Subsurface Imaging, connectedTo, Seismic Data Processing>
+<Subsurface Imaging, partOf, Nuclear Test Monitoring>
+<Tectonic Plate Movement Monitoring, connectedTo, Epicenter Location>
+<Volcanic Seismology, connectedTo, Seismic Risk Mitigation>
+<Volcanic Seismology, partOf, Strong Motion Instrumentation>
+<start, connectedTo, Building Code Development>
+<start, connectedTo, Seismic Risk Mitigation>
+<start, yes, Earthquake Early Warning Systems>
diff --git a/test/mermaid/hard/mermaid_32.mmd b/test/mermaid/hard/mermaid_32.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..64795a286a5f6f455ac16410c43c284d45bee161
--- /dev/null
+++ b/test/mermaid/hard/mermaid_32.mmd
@@ -0,0 +1,140 @@
+graph LR
+    N0([Food Processing])
+    N1(Pest Spraying)
+    N2[/Seedling Transplanting/]
+    N3{Yield Prediction}
+    N4(Barn Cleaning)
+    N5(Fencing Installation)
+    N6(Disease Detection)
+    N7[Grain Drying]
+    N8(Traceability System)
+    N9[Produce Sorting]
+    N10{Precision Farming}
+    N11(Farm Maintenance)
+    N12(Forestry Management)
+    N13[Livestock Feeding]
+    N14[/Weed Removal/]
+    N15[/Farm Machinery Operation/]
+    N16[/Automated Milking/]
+    N17[Soil Nutrient Management]
+    N18([Crop Monitoring])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Agricultural Research
+        nest0_0{Organic Certification}
+        nest0_1(Harvesting)
+    end
+    subgraph Irrigation Scheduling
+        nest1_0[Greenhouse Control]
+        nest1_1{Packaging for Sale}
+        nest1_2[[Fertilizer Application]]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> |irrigates| N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    N15 -.-> N16
+    N16 -.-> N17
+    N17 -.-> N18
+    nest0_0 --> nest0_1
+    N15 -.-> nest0_0
+    nest0_1 -.-> N12
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N12 -.-> |controls| nest1_0
+    nest1_2 --> N12
+    N4 --> S0
+    S0 -.-> |stores| N8
+    S0 --> N6
+    S0 --> N11
+    N11 -.-> S1
+    S1 -.-> N18
+    S1 -.-> N15
+    N0 -.-> M0
+    N3 --> M0
+    N6 -.-> M0
+    M0 -.-> N8
+    N10 -.-> |sustains| M2
+    N13 --> M2
+    M2 -.-> N18
+    style N0 fill:#FFE0B2,stroke:#FF9800
+    style N1 fill:#C9EFEC,stroke:#6FE1D5
+    style N2 fill:#C5CAE9,stroke:#3F51B5
+    style N3 fill:#C5CAE9,stroke:#3F51B5
+    style N4 fill:#C5CAE9,stroke:#3F51B5
+    style N5 fill:#C5CAE9,stroke:#3F51B5
+    style N6 fill:#C5CAE9,stroke:#3F51B5
+    style N7 fill:#C9EFEC,stroke:#6FE1D5
+    style N8 fill:#FFE0B2,stroke:#FF9800
+    style N9 fill:#FFE0B2,stroke:#FF9800
+    style N10 fill:#C5CAE9,stroke:#3F51B5
+    style N11 fill:#FFE0B2,stroke:#FF9800
+    style N12 fill:#C5CAE9,stroke:#3F51B5
+    style N13 fill:#FFE0B2,stroke:#FF9800
+    style N14 fill:#C9EFEC,stroke:#6FE1D5
+    style N15 fill:#C5CAE9,stroke:#3F51B5
+    style N16 fill:#C9EFEC,stroke:#6FE1D5
+    style N17 fill:#C5CAE9,stroke:#3F51B5
+    style N18 fill:#FFE0B2,stroke:#FF9800
+    style S0 fill:#C5CAE9,stroke:#3F51B5
+    style S1 fill:#FFE0B2,stroke:#FF9800
+    style M0 fill:#C9EFEC,stroke:#6FE1D5
+    style M2 fill:#C5CAE9,stroke:#3F51B5
+    style nest0_0 fill:#C5CAE9,stroke:#3F51B5
+    style nest0_1 fill:#FFE0B2,stroke:#FF9800
+    style nest1_0 fill:#C9EFEC,stroke:#6FE1D5
+    style nest1_1 fill:#FFE0B2,stroke:#FF9800
+    style nest1_2 fill:#C5CAE9,stroke:#3F51B5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#3F51B5,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_32.txt b/test/mermaid/hard/mermaid_32.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ef9ec1a705fb7bdca4aa522cb9742a581d340fb9
--- /dev/null
+++ b/test/mermaid/hard/mermaid_32.txt
@@ -0,0 +1,40 @@
+<Automated Milking, connectedTo, Soil Nutrient Management>
+<Barn Cleaning, connectedTo, Disease Detection>
+<Barn Cleaning, connectedTo, Farm Maintenance>
+<Barn Cleaning, connectedTo, Fencing Installation>
+<Barn Cleaning, stores, Traceability System>
+<Disease Detection, connectedTo, Grain Drying>
+<Disease Detection, connectedTo, Traceability System>
+<Farm Machinery Operation, connectedTo, Automated Milking>
+<Farm Machinery Operation, connectedTo, Organic Certification>
+<Farm Maintenance, connectedTo, Crop Monitoring>
+<Farm Maintenance, connectedTo, Farm Machinery Operation>
+<Farm Maintenance, connectedTo, Forestry Management>
+<Fencing Installation, irrigates, Disease Detection>
+<Fertilizer Application, connectedTo, Forestry Management>
+<Fertilizer Application, partOf, Irrigation Scheduling>
+<Food Processing, connectedTo, Pest Spraying>
+<Food Processing, connectedTo, Traceability System>
+<Forestry Management, connectedTo, Livestock Feeding>
+<Forestry Management, controls, Greenhouse Control>
+<Grain Drying, connectedTo, Traceability System>
+<Greenhouse Control, connectedTo, Packaging for Sale>
+<Greenhouse Control, partOf, Irrigation Scheduling>
+<Harvesting, connectedTo, Forestry Management>
+<Harvesting, partOf, Agricultural Research>
+<Livestock Feeding, connectedTo, Crop Monitoring>
+<Livestock Feeding, connectedTo, Weed Removal>
+<Organic Certification, connectedTo, Harvesting>
+<Organic Certification, partOf, Agricultural Research>
+<Packaging for Sale, connectedTo, Fertilizer Application>
+<Packaging for Sale, partOf, Irrigation Scheduling>
+<Pest Spraying, connectedTo, Seedling Transplanting>
+<Precision Farming, connectedTo, Farm Maintenance>
+<Precision Farming, sustains, Crop Monitoring>
+<Produce Sorting, connectedTo, Precision Farming>
+<Seedling Transplanting, connectedTo, Yield Prediction>
+<Soil Nutrient Management, connectedTo, Crop Monitoring>
+<Traceability System, connectedTo, Produce Sorting>
+<Weed Removal, connectedTo, Farm Machinery Operation>
+<Yield Prediction, connectedTo, Barn Cleaning>
+<Yield Prediction, connectedTo, Traceability System>
diff --git a/test/mermaid/hard/mermaid_320.mmd b/test/mermaid/hard/mermaid_320.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..161f0be2cad7f5cbcdbfe7e5a557c0c183244f02
--- /dev/null
+++ b/test/mermaid/hard/mermaid_320.mmd
@@ -0,0 +1,146 @@
+graph TD
+    N0([Fault Line Mapping])
+    N1[P_Wave or S_Wave Distinction]
+    N2{Earthquake Prediction Research}
+    N3(Aftershock Analysis)
+    N4{Magnitude Determination}
+    N5[Seismic Data Processing]
+    N6[/Seismic Inversion/]
+    N7(Emergency Preparedness for Earthquakes)
+    N8([Building Code Development])
+    N9(Nuclear Test Monitoring)
+    N10([Tsunami Warning Systems])
+    N11[/Deep Earth Seismology/]
+    N12(Seismic Array Deployment)
+    N13[Computational Seismology]
+    N14([Data Archiving and Distribution])
+    N15[Induced Seismicity Monitoring]
+    N16(Structural Response to Earthquakes)
+    N17{Tectonic Stress Measurement}
+    N18[Seismic Hazard Assessment]
+    N19(Liquefaction Potential Assessment)
+    N20([Geophysical Exploration])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Seismic Risk Mitigation
+        nest0_0(Seismic Instrumentation Maintenance)
+        nest0_1[(Planetary Seismology)]
+        nest0_2[Seismic Network Operations]
+    end
+    subgraph Earthquake Detection
+        nest1_0[/Subsurface Imaging/]
+        nest1_1[(Paleoseismology)]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    N15 -.-> N16
+    N16 -.-> N17
+    N17 --> N18
+    N18 --> |notifies| N19
+    N19 --> N20
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    N15 --> nest0_0
+    nest0_2 --> N17
+    nest1_0 -.-> |visualizes| nest1_1
+    N5 -.-> nest1_0
+    nest1_1 -.-> N17
+    N9 -.-> S0
+    S0 -.-> N13
+    S0 --> N14
+    N8 -.-> S1
+    S1 -.-> N19
+    S1 -.-> N15
+    S1 -.-> |earthquakes_studies| N20
+    N3 -.-> M0
+    N10 --> M0
+    M0 -.-> N14
+    N3 -.-> M1
+    N0 -.-> M1
+    M1 -.-> N6
+    style N0 fill:#E1F5FE,stroke:#4FC3F7
+    style N1 fill:#F1F8E9,stroke:#388E3C
+    style N2 fill:#F1F8E9,stroke:#388E3C
+    style N3 fill:#F8BBD0,stroke:#E91E63
+    style N4 fill:#F8BBD0,stroke:#E91E63
+    style N5 fill:#F1F8E9,stroke:#388E3C
+    style N6 fill:#F1F8E9,stroke:#388E3C
+    style N7 fill:#F1F8E9,stroke:#388E3C
+    style N8 fill:#E1F5FE,stroke:#4FC3F7
+    style N9 fill:#E1F5FE,stroke:#4FC3F7
+    style N10 fill:#F1F8E9,stroke:#388E3C
+    style N11 fill:#E1F5FE,stroke:#4FC3F7
+    style N12 fill:#F1F8E9,stroke:#388E3C
+    style N13 fill:#F8BBD0,stroke:#E91E63
+    style N14 fill:#E1F5FE,stroke:#4FC3F7
+    style N15 fill:#E1F5FE,stroke:#4FC3F7
+    style N16 fill:#F1F8E9,stroke:#388E3C
+    style N17 fill:#E1F5FE,stroke:#4FC3F7
+    style N18 fill:#F8BBD0,stroke:#E91E63
+    style N19 fill:#E1F5FE,stroke:#4FC3F7
+    style N20 fill:#F8BBD0,stroke:#E91E63
+    style S0 fill:#E1F5FE,stroke:#4FC3F7
+    style S1 fill:#F1F8E9,stroke:#388E3C
+    style M0 fill:#E1F5FE,stroke:#4FC3F7
+    style M1 fill:#E1F5FE,stroke:#4FC3F7
+    style nest0_0 fill:#E1F5FE,stroke:#4FC3F7
+    style nest0_1 fill:#E1F5FE,stroke:#4FC3F7
+    style nest0_2 fill:#E1F5FE,stroke:#4FC3F7
+    style nest1_0 fill:#E1F5FE,stroke:#4FC3F7
+    style nest1_1 fill:#E1F5FE,stroke:#4FC3F7
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#E91E63,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_320.txt b/test/mermaid/hard/mermaid_320.txt
new file mode 100644
index 0000000000000000000000000000000000000000..af68b5422ee56d8599a99bd57ceffc9395fc3339
--- /dev/null
+++ b/test/mermaid/hard/mermaid_320.txt
@@ -0,0 +1,41 @@
+<Aftershock Analysis, connectedTo, Data Archiving and Distribution>
+<Aftershock Analysis, connectedTo, Magnitude Determination>
+<Aftershock Analysis, connectedTo, Seismic Inversion>
+<Building Code Development, connectedTo, Induced Seismicity Monitoring>
+<Building Code Development, connectedTo, Liquefaction Potential Assessment>
+<Building Code Development, connectedTo, Nuclear Test Monitoring>
+<Building Code Development, earthquakes_studies, Geophysical Exploration>
+<Computational Seismology, connectedTo, Data Archiving and Distribution>
+<Data Archiving and Distribution, connectedTo, Induced Seismicity Monitoring>
+<Deep Earth Seismology, connectedTo, Seismic Array Deployment>
+<Earthquake Prediction Research, connectedTo, Aftershock Analysis>
+<Emergency Preparedness for Earthquakes, connectedTo, Building Code Development>
+<Fault Line Mapping, connectedTo, P_Wave or S_Wave Distinction>
+<Fault Line Mapping, connectedTo, Seismic Inversion>
+<Induced Seismicity Monitoring, connectedTo, Seismic Instrumentation Maintenance>
+<Induced Seismicity Monitoring, connectedTo, Structural Response to Earthquakes>
+<Liquefaction Potential Assessment, connectedTo, Geophysical Exploration>
+<Magnitude Determination, connectedTo, Seismic Data Processing>
+<Nuclear Test Monitoring, connectedTo, Computational Seismology>
+<Nuclear Test Monitoring, connectedTo, Data Archiving and Distribution>
+<Nuclear Test Monitoring, connectedTo, Tsunami Warning Systems>
+<P_Wave or S_Wave Distinction, connectedTo, Earthquake Prediction Research>
+<Paleoseismology, connectedTo, Tectonic Stress Measurement>
+<Paleoseismology, partOf, Earthquake Detection>
+<Planetary Seismology, connectedTo, Seismic Network Operations>
+<Planetary Seismology, partOf, Seismic Risk Mitigation>
+<Seismic Array Deployment, connectedTo, Computational Seismology>
+<Seismic Data Processing, connectedTo, Seismic Inversion>
+<Seismic Data Processing, connectedTo, Subsurface Imaging>
+<Seismic Hazard Assessment, notifies, Liquefaction Potential Assessment>
+<Seismic Instrumentation Maintenance, connectedTo, Planetary Seismology>
+<Seismic Instrumentation Maintenance, partOf, Seismic Risk Mitigation>
+<Seismic Inversion, connectedTo, Emergency Preparedness for Earthquakes>
+<Seismic Network Operations, connectedTo, Tectonic Stress Measurement>
+<Seismic Network Operations, partOf, Seismic Risk Mitigation>
+<Structural Response to Earthquakes, connectedTo, Tectonic Stress Measurement>
+<Subsurface Imaging, partOf, Earthquake Detection>
+<Subsurface Imaging, visualizes, Paleoseismology>
+<Tectonic Stress Measurement, connectedTo, Seismic Hazard Assessment>
+<Tsunami Warning Systems, connectedTo, Data Archiving and Distribution>
+<Tsunami Warning Systems, connectedTo, Deep Earth Seismology>
diff --git a/test/mermaid/hard/mermaid_321.mmd b/test/mermaid/hard/mermaid_321.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..eb6441107023f07402e44aa3402a76aaf61a5dd1
--- /dev/null
+++ b/test/mermaid/hard/mermaid_321.mmd
@@ -0,0 +1,106 @@
+graph BT
+    N0([Earth Structure Imaging])
+    N1[/Seismic Array Deployment/]
+    N2[(Seismic Data Processing)]
+    N3(Magnitude Determination)
+    N4[[Seismic Network Operations]]
+    N5(Planetary Seismology)
+    N6[Earthquake Early Warning Systems]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Building Code Development
+        nest0_0{Nuclear Test Monitoring}
+        nest0_1(Subsurface Imaging)
+        nest0_2[(Tectonic Plate Movement Monitoring)]
+        nest0_3{Seismic Wave Analysis}
+    end
+    subgraph P_Wave or S_Wave Distinction
+        nest1_0[[Computational Seismology]]
+        nest1_1[(Seismic Inversion)]
+        nest1_2[[Seismic Noise Analysis]]
+        nest1_3[(Microseismicity Study)]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    nest0_0 -.-> nest0_1
+    nest0_1 --> |interprets| nest0_2
+    nest0_2 -.-> nest0_3
+    N3 --> nest0_0
+    nest0_3 -.-> N4
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N5 -.-> nest1_0
+    nest1_3 -.-> N6
+    N2 -.-> S0
+    S0 --> N5
+    S0 --> N4
+    N1 -.-> S1
+    S1 -.-> N4
+    S1 --> N3
+    S1 --> N5
+    N1 -.-> S2
+    S2 --> N6
+    S2 --> N5
+    N0 --> M1
+    N2 -.-> M1
+    N3 -.-> M1
+    N4 --> M1
+    M1 -.-> N6
+    style N0 fill:#F3E5F5,stroke:#BA68C8
+    style N1 fill:#F6F6F6,stroke:#CFCFCF
+    style N2 fill:#F6F6F6,stroke:#CFCFCF
+    style N3 fill:#E9F7E8,stroke:#6EB76D
+    style N4 fill:#E9F7E8,stroke:#6EB76D
+    style N5 fill:#E9F7E8,stroke:#6EB76D
+    style N6 fill:#E9F7E8,stroke:#6EB76D
+    style S0 fill:#F3E5F5,stroke:#BA68C8
+    style S1 fill:#F3E5F5,stroke:#BA68C8
+    style S2 fill:#F3E5F5,stroke:#BA68C8
+    style M1 fill:#F6F6F6,stroke:#CFCFCF
+    style nest0_0 fill:#F6F6F6,stroke:#CFCFCF
+    style nest0_1 fill:#F3E5F5,stroke:#BA68C8
+    style nest0_2 fill:#E9F7E8,stroke:#6EB76D
+    style nest0_3 fill:#F3E5F5,stroke:#BA68C8
+    style nest1_0 fill:#F3E5F5,stroke:#BA68C8
+    style nest1_1 fill:#E9F7E8,stroke:#6EB76D
+    style nest1_2 fill:#F3E5F5,stroke:#BA68C8
+    style nest1_3 fill:#F3E5F5,stroke:#BA68C8
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#BA68C8,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#BA68C8,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_321.txt b/test/mermaid/hard/mermaid_321.txt
new file mode 100644
index 0000000000000000000000000000000000000000..40b0538d59d3e3b273cd24d3a39c0be88b634895
--- /dev/null
+++ b/test/mermaid/hard/mermaid_321.txt
@@ -0,0 +1,34 @@
+<Computational Seismology, connectedTo, Seismic Inversion>
+<Computational Seismology, partOf, P_Wave or S_Wave Distinction>
+<Earth Structure Imaging, connectedTo, Earthquake Early Warning Systems>
+<Earth Structure Imaging, connectedTo, Seismic Array Deployment>
+<Magnitude Determination, connectedTo, Earthquake Early Warning Systems>
+<Magnitude Determination, connectedTo, Nuclear Test Monitoring>
+<Magnitude Determination, connectedTo, Seismic Network Operations>
+<Microseismicity Study, connectedTo, Earthquake Early Warning Systems>
+<Microseismicity Study, partOf, P_Wave or S_Wave Distinction>
+<Nuclear Test Monitoring, connectedTo, Subsurface Imaging>
+<Nuclear Test Monitoring, partOf, Building Code Development>
+<Planetary Seismology, connectedTo, Computational Seismology>
+<Planetary Seismology, connectedTo, Earthquake Early Warning Systems>
+<Seismic Array Deployment, connectedTo, Earthquake Early Warning Systems>
+<Seismic Array Deployment, connectedTo, Magnitude Determination>
+<Seismic Array Deployment, connectedTo, Planetary Seismology>
+<Seismic Array Deployment, connectedTo, Seismic Data Processing>
+<Seismic Array Deployment, connectedTo, Seismic Network Operations>
+<Seismic Data Processing, connectedTo, Earthquake Early Warning Systems>
+<Seismic Data Processing, connectedTo, Magnitude Determination>
+<Seismic Data Processing, connectedTo, Planetary Seismology>
+<Seismic Data Processing, connectedTo, Seismic Network Operations>
+<Seismic Inversion, connectedTo, Seismic Noise Analysis>
+<Seismic Inversion, partOf, P_Wave or S_Wave Distinction>
+<Seismic Network Operations, connectedTo, Earthquake Early Warning Systems>
+<Seismic Network Operations, connectedTo, Planetary Seismology>
+<Seismic Noise Analysis, connectedTo, Microseismicity Study>
+<Seismic Noise Analysis, partOf, P_Wave or S_Wave Distinction>
+<Seismic Wave Analysis, connectedTo, Seismic Network Operations>
+<Seismic Wave Analysis, partOf, Building Code Development>
+<Subsurface Imaging, interprets, Tectonic Plate Movement Monitoring>
+<Subsurface Imaging, partOf, Building Code Development>
+<Tectonic Plate Movement Monitoring, connectedTo, Seismic Wave Analysis>
+<Tectonic Plate Movement Monitoring, partOf, Building Code Development>
diff --git a/test/mermaid/hard/mermaid_322.mmd b/test/mermaid/hard/mermaid_322.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..c1fb6fc52f9590af041d9b7b7ba7dab9db9d62cc
--- /dev/null
+++ b/test/mermaid/hard/mermaid_322.mmd
@@ -0,0 +1,136 @@
+graph RL
+    N0([start])
+    N1(Methylation Analysis)
+    N2(Social Implications)
+    N3[[Disease Gene Identification]]
+    N4(Metabolomics)
+    N5[(Population Genomics)]
+    N6{Structural Genomics}
+    N7[Comparative Genomics]
+    N8[Microbial Genomics]
+    N9(Gene Expression Profiling)
+    N10(Rare Disease Genomics)
+    N11[(Next_Generation Sequencing)]
+    N12[Synthetic Genomics]
+    N13[(Functional Genomics)]
+    N14([Long_Read Sequencing])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Variant Calling
+        nest0_0[(Pharmacogenomics)]
+        nest0_1[/Biomarker Discovery/]
+        nest0_2(Genomic Data Analysis)
+    end
+    subgraph Genomic Data Visualization
+        nest1_0[(Data Privacy in Genomics)]
+        nest1_1([DNA Sequencing])
+        nest1_2[Genome Assembly]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 --> N14
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    N5 -.-> nest0_0
+    nest0_2 -.-> N3
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N12 -.-> nest1_0
+    nest1_2 -.-> N13
+    N6 --> S0
+    S0 --> N14
+    S0 -.-> |DNA_explores| N9
+    S0 --> N12
+    N4 --> S1
+    S1 --> N10
+    S1 -.-> N14
+    N0 --> M0
+    N1 -.-> M0
+    M0 -.-> N5
+    N2 --> M1
+    N5 --> M1
+    N0 --> M1
+    M1 --> N8
+    N2 --> M2
+    N0 -.-> M2
+    M2 -.-> N5
+    style N0 fill:#E6EE9C,stroke:#CDDC39
+    style N1 fill:#E0F2F1,stroke:#26A69A
+    style N2 fill:#C5CAE9,stroke:#3F51B5
+    style N3 fill:#C5CAE9,stroke:#3F51B5
+    style N4 fill:#E0F2F1,stroke:#26A69A
+    style N5 fill:#E0F2F1,stroke:#26A69A
+    style N6 fill:#C5CAE9,stroke:#3F51B5
+    style N7 fill:#C5CAE9,stroke:#3F51B5
+    style N8 fill:#E6EE9C,stroke:#CDDC39
+    style N9 fill:#E0F2F1,stroke:#26A69A
+    style N10 fill:#C5CAE9,stroke:#3F51B5
+    style N11 fill:#E6EE9C,stroke:#CDDC39
+    style N12 fill:#E0F2F1,stroke:#26A69A
+    style N13 fill:#E6EE9C,stroke:#CDDC39
+    style N14 fill:#E6EE9C,stroke:#CDDC39
+    style S0 fill:#C5CAE9,stroke:#3F51B5
+    style S1 fill:#E6EE9C,stroke:#CDDC39
+    style M0 fill:#C5CAE9,stroke:#3F51B5
+    style M1 fill:#E0F2F1,stroke:#26A69A
+    style M2 fill:#C5CAE9,stroke:#3F51B5
+    style nest0_0 fill:#C5CAE9,stroke:#3F51B5
+    style nest0_1 fill:#E0F2F1,stroke:#26A69A
+    style nest0_2 fill:#C5CAE9,stroke:#3F51B5
+    style nest1_0 fill:#E0F2F1,stroke:#26A69A
+    style nest1_1 fill:#E6EE9C,stroke:#CDDC39
+    style nest1_2 fill:#E0F2F1,stroke:#26A69A
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#26A69A,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_322.txt b/test/mermaid/hard/mermaid_322.txt
new file mode 100644
index 0000000000000000000000000000000000000000..df4edcdec825069eff6937570be971c72a56524a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_322.txt
@@ -0,0 +1,39 @@
+<Biomarker Discovery, connectedTo, Genomic Data Analysis>
+<Biomarker Discovery, partOf, Variant Calling>
+<Comparative Genomics, connectedTo, Microbial Genomics>
+<DNA Sequencing, connectedTo, Genome Assembly>
+<DNA Sequencing, partOf, Genomic Data Visualization>
+<Data Privacy in Genomics, connectedTo, DNA Sequencing>
+<Data Privacy in Genomics, partOf, Genomic Data Visualization>
+<Disease Gene Identification, connectedTo, Metabolomics>
+<Functional Genomics, connectedTo, Long_Read Sequencing>
+<Gene Expression Profiling, connectedTo, Rare Disease Genomics>
+<Genome Assembly, connectedTo, Functional Genomics>
+<Genome Assembly, partOf, Genomic Data Visualization>
+<Genomic Data Analysis, connectedTo, Disease Gene Identification>
+<Genomic Data Analysis, partOf, Variant Calling>
+<Metabolomics, connectedTo, Long_Read Sequencing>
+<Metabolomics, connectedTo, Population Genomics>
+<Metabolomics, connectedTo, Rare Disease Genomics>
+<Methylation Analysis, connectedTo, Population Genomics>
+<Methylation Analysis, connectedTo, Social Implications>
+<Microbial Genomics, connectedTo, Gene Expression Profiling>
+<Next_Generation Sequencing, connectedTo, Synthetic Genomics>
+<Pharmacogenomics, connectedTo, Biomarker Discovery>
+<Pharmacogenomics, partOf, Variant Calling>
+<Population Genomics, connectedTo, Microbial Genomics>
+<Population Genomics, connectedTo, Pharmacogenomics>
+<Population Genomics, connectedTo, Structural Genomics>
+<Rare Disease Genomics, connectedTo, Next_Generation Sequencing>
+<Social Implications, connectedTo, Disease Gene Identification>
+<Social Implications, connectedTo, Microbial Genomics>
+<Social Implications, connectedTo, Population Genomics>
+<Structural Genomics, DNA_explores, Gene Expression Profiling>
+<Structural Genomics, connectedTo, Comparative Genomics>
+<Structural Genomics, connectedTo, Long_Read Sequencing>
+<Structural Genomics, connectedTo, Synthetic Genomics>
+<Synthetic Genomics, connectedTo, Data Privacy in Genomics>
+<Synthetic Genomics, connectedTo, Functional Genomics>
+<start, connectedTo, Methylation Analysis>
+<start, connectedTo, Microbial Genomics>
+<start, connectedTo, Population Genomics>
diff --git a/test/mermaid/hard/mermaid_323.mmd b/test/mermaid/hard/mermaid_323.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..180c2d4bc2990bd94122814cda0fc9d8dd48efeb
--- /dev/null
+++ b/test/mermaid/hard/mermaid_323.mmd
@@ -0,0 +1,154 @@
+graph BT
+    N0([Synthetic Genomics])
+    N1[Genome_Wide Association Studies]
+    N2{Genomic Data Sharing}
+    N3[Disease Gene Identification]
+    N4[(Gene Therapy Development)]
+    N5[Pharmacogenomics]
+    N6[Biomarker Discovery]
+    N7[[Personalized Medicine]]
+    N8[(Genome Assembly)]
+    N9[[Structural Genomics]]
+    N10[(Bioinformatics Pipeline Development)]
+    N11([Microbial Genomics])
+    N12[(Spatial Genomics)]
+    N13[/Transcriptomics/]
+    N14{Genomic Data Analysis}
+    N15(Proteomics)
+    N16[/Single_Cell Genomics/]
+    N17{Genomic Data Visualization}
+    N18([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Computational Genomics
+        nest0_0[/Gene Expression Profiling/]
+        nest0_1[/Gene Annotation/]
+        nest0_2(Methylation Analysis)
+        nest0_3{Variant Calling}
+    end
+    subgraph Cloning Technologies
+        nest1_0[/Epigenomics/]
+        nest1_1[/Metabolomics/]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> |advises| N8
+    N8 --> N9
+    N9 --> N10
+    N10 --> N11
+    N11 --> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    N15 --> |diagnoses| N16
+    N16 -.-> N17
+    N17 -.-> N18
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N17 -.-> |algorithms_develops| nest0_0
+    nest0_3 -.-> |publishes| N3
+    nest1_0 --> nest1_1
+    N8 --> nest1_0
+    nest1_1 --> N14
+    N13 -.-> S0
+    S0 -.-> N17
+    S0 -.-> N18
+    N12 -.-> S1
+    S1 --> N15
+    S1 -.-> N18
+    S1 -.-> |visualizes_data| N17
+    N3 --> S2
+    S2 -.-> N10
+    S2 --> |genomes_researches| N14
+    N2 -.-> M0
+    N0 -.-> |interprets| M0
+    N1 -.-> M0
+    M0 -.-> N4
+    N2 --> M1
+    N0 --> M1
+    N1 -.-> M1
+    M1 --> N4
+    style N0 fill:#E4E0DF,stroke:#BDAFA8
+    style N1 fill:#E4E0DF,stroke:#BDAFA8
+    style N2 fill:#E4E0DF,stroke:#BDAFA8
+    style N3 fill:#E4E0DF,stroke:#BDAFA8
+    style N4 fill:#E4E0DF,stroke:#BDAFA8
+    style N5 fill:#E4E0DF,stroke:#BDAFA8
+    style N6 fill:#FFF3E0,stroke:#FFA726
+    style N7 fill:#E4E0DF,stroke:#BDAFA8
+    style N8 fill:#E4E0DF,stroke:#BDAFA8
+    style N9 fill:#E4E0DF,stroke:#BDAFA8
+    style N10 fill:#FFFDE0,stroke:#FFF8A6
+    style N11 fill:#FFF3E0,stroke:#FFA726
+    style N12 fill:#FFFDE0,stroke:#FFF8A6
+    style N13 fill:#FFFDE0,stroke:#FFF8A6
+    style N14 fill:#E4E0DF,stroke:#BDAFA8
+    style N15 fill:#E4E0DF,stroke:#BDAFA8
+    style N16 fill:#E4E0DF,stroke:#BDAFA8
+    style N17 fill:#FFF3E0,stroke:#FFA726
+    style N18 fill:#E4E0DF,stroke:#BDAFA8
+    style S0 fill:#FFFDE0,stroke:#FFF8A6
+    style S1 fill:#FFFDE0,stroke:#FFF8A6
+    style S2 fill:#FFF3E0,stroke:#FFA726
+    style M0 fill:#FFF3E0,stroke:#FFA726
+    style M1 fill:#FFFDE0,stroke:#FFF8A6
+    style nest0_0 fill:#E4E0DF,stroke:#BDAFA8
+    style nest0_1 fill:#E4E0DF,stroke:#BDAFA8
+    style nest0_2 fill:#FFFDE0,stroke:#FFF8A6
+    style nest0_3 fill:#E4E0DF,stroke:#BDAFA8
+    style nest1_0 fill:#FFFDE0,stroke:#FFF8A6
+    style nest1_1 fill:#FFF3E0,stroke:#FFA726
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#FFF8A6,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_323.txt b/test/mermaid/hard/mermaid_323.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b5dec4185d93e2833a9f9d9024323cd8bbd2ad11
--- /dev/null
+++ b/test/mermaid/hard/mermaid_323.txt
@@ -0,0 +1,43 @@
+<Bioinformatics Pipeline Development, connectedTo, Microbial Genomics>
+<Biomarker Discovery, connectedTo, Personalized Medicine>
+<Disease Gene Identification, connectedTo, Bioinformatics Pipeline Development>
+<Disease Gene Identification, connectedTo, Gene Therapy Development>
+<Disease Gene Identification, genomes_researches, Genomic Data Analysis>
+<Epigenomics, connectedTo, Metabolomics>
+<Epigenomics, partOf, Cloning Technologies>
+<Gene Annotation, connectedTo, Methylation Analysis>
+<Gene Annotation, partOf, Computational Genomics>
+<Gene Expression Profiling, connectedTo, Gene Annotation>
+<Gene Expression Profiling, partOf, Computational Genomics>
+<Gene Therapy Development, connectedTo, Pharmacogenomics>
+<Genome Assembly, connectedTo, Epigenomics>
+<Genome Assembly, connectedTo, Structural Genomics>
+<Genome_Wide Association Studies, connectedTo, Gene Therapy Development>
+<Genome_Wide Association Studies, connectedTo, Genomic Data Sharing>
+<Genomic Data Analysis, connectedTo, Proteomics>
+<Genomic Data Sharing, connectedTo, Disease Gene Identification>
+<Genomic Data Sharing, connectedTo, Gene Therapy Development>
+<Genomic Data Visualization, algorithms_develops, Gene Expression Profiling>
+<Genomic Data Visualization, connectedTo, end>
+<Metabolomics, connectedTo, Genomic Data Analysis>
+<Metabolomics, partOf, Cloning Technologies>
+<Methylation Analysis, connectedTo, Variant Calling>
+<Methylation Analysis, partOf, Computational Genomics>
+<Microbial Genomics, connectedTo, Spatial Genomics>
+<Personalized Medicine, advises, Genome Assembly>
+<Pharmacogenomics, connectedTo, Biomarker Discovery>
+<Proteomics, diagnoses, Single_Cell Genomics>
+<Single_Cell Genomics, connectedTo, Genomic Data Visualization>
+<Spatial Genomics, connectedTo, Proteomics>
+<Spatial Genomics, connectedTo, Transcriptomics>
+<Spatial Genomics, connectedTo, end>
+<Spatial Genomics, visualizes_data, Genomic Data Visualization>
+<Structural Genomics, connectedTo, Bioinformatics Pipeline Development>
+<Synthetic Genomics, connectedTo, Gene Therapy Development>
+<Synthetic Genomics, connectedTo, Genome_Wide Association Studies>
+<Synthetic Genomics, interprets, Gene Therapy Development>
+<Transcriptomics, connectedTo, Genomic Data Analysis>
+<Transcriptomics, connectedTo, Genomic Data Visualization>
+<Transcriptomics, connectedTo, end>
+<Variant Calling, partOf, Computational Genomics>
+<Variant Calling, publishes, Disease Gene Identification>
diff --git a/test/mermaid/hard/mermaid_324.mmd b/test/mermaid/hard/mermaid_324.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..5ebf8307bc705789db4b3a16a0a71df1d7587961
--- /dev/null
+++ b/test/mermaid/hard/mermaid_324.mmd
@@ -0,0 +1,89 @@
+graph LR
+    N0([start])
+    N1(Synthetic Genomics)
+    N2[(Long_Read Sequencing)]
+    N3(Gene Therapy Development)
+    N4(Personalized Medicine)
+    N5[/Gene Annotation/]
+    N6[/DNA Sequencing/]
+    N7[(Genome Assembly)]
+    N8[(Genetic Testing)]
+    N9([Spatial Genomics])
+    N10[(Single_Cell Genomics)]
+    N11[/CRISPR Gene Drive Research/]
+    N12[Biomarker Discovery]
+    S0(( ))
+    M0(( ))
+    subgraph Pharmacogenomics
+        nest0_0(Cloning Technologies)
+        nest0_1[Rare Disease Genomics]
+    end
+    subgraph Epigenomics
+        nest1_0[Transcriptomics]
+        nest1_1[(Metabolomics)]
+        nest1_2[/Data Privacy in Genomics/]
+        nest1_3[[Variant Calling]]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> |no| N12
+    nest0_0 --> nest0_1
+    N4 --> nest0_0
+    nest0_1 -.-> N10
+    nest1_0 -.-> |no| nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 -.-> nest1_3
+    N2 -.-> nest1_0
+    nest1_3 -.-> N4
+    N5 -.-> S0
+    S0 -.-> N12
+    S0 -.-> N9
+    N8 -.-> M0
+    N4 --> M0
+    N1 -.-> M0
+    M0 -.-> N11
+    N4 --> |no| N8
+    N12 -.-> nest1_1
+    nest1_2 --> N3
+    style S0 fill:#BBDEFB,stroke:#2196F3
+    style M0 fill:#D3D7EB,stroke:#8C9EFF
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#6EB76D,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_324.txt b/test/mermaid/hard/mermaid_324.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c1ab06388c876ecf74107f1cfb878fa03a722612
--- /dev/null
+++ b/test/mermaid/hard/mermaid_324.txt
@@ -0,0 +1,34 @@
+<Biomarker Discovery, connectedTo, Metabolomics>
+<CRISPR Gene Drive Research, no, Biomarker Discovery>
+<Cloning Technologies, connectedTo, Rare Disease Genomics>
+<Cloning Technologies, partOf, Pharmacogenomics>
+<DNA Sequencing, connectedTo, Genome Assembly>
+<Data Privacy in Genomics, connectedTo, Gene Therapy Development>
+<Data Privacy in Genomics, connectedTo, Variant Calling>
+<Data Privacy in Genomics, partOf, Epigenomics>
+<Gene Annotation, connectedTo, Biomarker Discovery>
+<Gene Annotation, connectedTo, DNA Sequencing>
+<Gene Annotation, connectedTo, Spatial Genomics>
+<Gene Therapy Development, connectedTo, Personalized Medicine>
+<Genetic Testing, connectedTo, CRISPR Gene Drive Research>
+<Genetic Testing, connectedTo, Spatial Genomics>
+<Genome Assembly, connectedTo, Genetic Testing>
+<Long_Read Sequencing, connectedTo, Gene Therapy Development>
+<Long_Read Sequencing, connectedTo, Transcriptomics>
+<Metabolomics, connectedTo, Data Privacy in Genomics>
+<Metabolomics, partOf, Epigenomics>
+<Personalized Medicine, connectedTo, CRISPR Gene Drive Research>
+<Personalized Medicine, connectedTo, Cloning Technologies>
+<Personalized Medicine, connectedTo, Gene Annotation>
+<Personalized Medicine, no, Genetic Testing>
+<Rare Disease Genomics, connectedTo, Single_Cell Genomics>
+<Rare Disease Genomics, partOf, Pharmacogenomics>
+<Single_Cell Genomics, connectedTo, CRISPR Gene Drive Research>
+<Spatial Genomics, connectedTo, Single_Cell Genomics>
+<Synthetic Genomics, connectedTo, CRISPR Gene Drive Research>
+<Synthetic Genomics, connectedTo, Long_Read Sequencing>
+<Transcriptomics, no, Metabolomics>
+<Transcriptomics, partOf, Epigenomics>
+<Variant Calling, connectedTo, Personalized Medicine>
+<Variant Calling, partOf, Epigenomics>
+<start, connectedTo, Synthetic Genomics>
diff --git a/test/mermaid/hard/mermaid_325.mmd b/test/mermaid/hard/mermaid_325.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..e9618261b7e4bc24a3d0f886062ef7a85ebe8483
--- /dev/null
+++ b/test/mermaid/hard/mermaid_325.mmd
@@ -0,0 +1,130 @@
+graph BT
+    N0([Meeting Transcription])
+    N1(Speech Data Annotation)
+    N2[Call Center Automation]
+    N3[Multimodal Speech Processing]
+    N4[Speaker Identification]
+    N5[/Voice Activity Detection/]
+    N6[Robust Speech Recognition]
+    N7[(Real_Time Captioning)]
+    N8[Contextual Understanding]
+    N9(Language Modeling)
+    N10(Voice Search Optimization)
+    N11(Cross_Lingual Speech Recognition)
+    N12(Natural Language Understanding)
+    N13[Accent Recognition]
+    N14[(Dialect Adaptation)]
+    N15([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Children's Speech Recognition
+        nest0_0[Command and Control]
+        nest0_1[Voice Assistant Development]
+    end
+    subgraph Embedded Speech Recognition
+        nest1_0{Noise Reduction}
+        nest1_1[/Phonetic Transcription/]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    nest0_0 -.-> nest0_1
+    N12 -.-> nest0_0
+    nest0_1 --> N9
+    nest1_0 -.-> nest1_1
+    N12 --> nest1_0
+    nest1_1 --> N9
+    N10 --> S0
+    S0 --> N14
+    S0 -.-> N15
+    S0 --> N12
+    N8 --> S1
+    S1 --> N14
+    S1 --> N11
+    N2 -.-> M0
+    N3 --> M0
+    M0 -.-> N7
+    N5 -.-> M1
+    N4 --> M1
+    M1 -.-> N7
+    N1 -.-> M2
+    N0 -.-> M2
+    M2 --> N3
+    style N0 fill:#FFDCD6,stroke:#FFB2A5
+    style N1 fill:#F5F5DC,stroke:#BCB88A
+    style N2 fill:#FFDCD6,stroke:#FFB2A5
+    style N3 fill:#C8EDFF,stroke:#82DAFF
+    style N4 fill:#F5F5DC,stroke:#BCB88A
+    style N5 fill:#C8EDFF,stroke:#82DAFF
+    style N6 fill:#FFDCD6,stroke:#FFB2A5
+    style N7 fill:#C8EDFF,stroke:#82DAFF
+    style N8 fill:#F5F5DC,stroke:#BCB88A
+    style N9 fill:#F5F5DC,stroke:#BCB88A
+    style N10 fill:#FFDCD6,stroke:#FFB2A5
+    style N11 fill:#F5F5DC,stroke:#BCB88A
+    style N12 fill:#F5F5DC,stroke:#BCB88A
+    style N13 fill:#C8EDFF,stroke:#82DAFF
+    style N14 fill:#FFDCD6,stroke:#FFB2A5
+    style N15 fill:#F5F5DC,stroke:#BCB88A
+    style S0 fill:#FFDCD6,stroke:#FFB2A5
+    style S1 fill:#FFDCD6,stroke:#FFB2A5
+    style M0 fill:#FFDCD6,stroke:#FFB2A5
+    style M1 fill:#F5F5DC,stroke:#BCB88A
+    style M2 fill:#FFDCD6,stroke:#FFB2A5
+    style nest0_0 fill:#C8EDFF,stroke:#82DAFF
+    style nest0_1 fill:#F5F5DC,stroke:#BCB88A
+    style nest1_0 fill:#F5F5DC,stroke:#BCB88A
+    style nest1_1 fill:#F5F5DC,stroke:#BCB88A
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#82DAFF,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_325.txt b/test/mermaid/hard/mermaid_325.txt
new file mode 100644
index 0000000000000000000000000000000000000000..aa8e1cac41cda9d07a70481df2f05f0f27c711f4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_325.txt
@@ -0,0 +1,36 @@
+<Accent Recognition, connectedTo, Dialect Adaptation>
+<Call Center Automation, connectedTo, Multimodal Speech Processing>
+<Call Center Automation, connectedTo, Real_Time Captioning>
+<Command and Control, connectedTo, Voice Assistant Development>
+<Command and Control, partOf, Children's Speech Recognition>
+<Contextual Understanding, connectedTo, Cross_Lingual Speech Recognition>
+<Contextual Understanding, connectedTo, Dialect Adaptation>
+<Contextual Understanding, connectedTo, Language Modeling>
+<Cross_Lingual Speech Recognition, connectedTo, Natural Language Understanding>
+<Dialect Adaptation, connectedTo, end>
+<Language Modeling, connectedTo, Voice Search Optimization>
+<Meeting Transcription, connectedTo, Multimodal Speech Processing>
+<Meeting Transcription, connectedTo, Speech Data Annotation>
+<Multimodal Speech Processing, connectedTo, Real_Time Captioning>
+<Multimodal Speech Processing, connectedTo, Speaker Identification>
+<Natural Language Understanding, connectedTo, Accent Recognition>
+<Natural Language Understanding, connectedTo, Command and Control>
+<Natural Language Understanding, connectedTo, Noise Reduction>
+<Noise Reduction, connectedTo, Phonetic Transcription>
+<Noise Reduction, partOf, Embedded Speech Recognition>
+<Phonetic Transcription, connectedTo, Language Modeling>
+<Phonetic Transcription, partOf, Embedded Speech Recognition>
+<Real_Time Captioning, connectedTo, Contextual Understanding>
+<Robust Speech Recognition, connectedTo, Real_Time Captioning>
+<Speaker Identification, connectedTo, Real_Time Captioning>
+<Speaker Identification, connectedTo, Voice Activity Detection>
+<Speech Data Annotation, connectedTo, Call Center Automation>
+<Speech Data Annotation, connectedTo, Multimodal Speech Processing>
+<Voice Activity Detection, connectedTo, Real_Time Captioning>
+<Voice Activity Detection, connectedTo, Robust Speech Recognition>
+<Voice Assistant Development, connectedTo, Language Modeling>
+<Voice Assistant Development, partOf, Children's Speech Recognition>
+<Voice Search Optimization, connectedTo, Cross_Lingual Speech Recognition>
+<Voice Search Optimization, connectedTo, Dialect Adaptation>
+<Voice Search Optimization, connectedTo, Natural Language Understanding>
+<Voice Search Optimization, connectedTo, end>
diff --git a/test/mermaid/hard/mermaid_326.mmd b/test/mermaid/hard/mermaid_326.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..09e2c49c5361175cf79fafcc499e97120ea7681e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_326.mmd
@@ -0,0 +1,104 @@
+graph BT
+    N0([start])
+    N1[/Feature Extraction/]
+    N2(Speech Emotion Recognition)
+    N3(Emotion Recognition from Voice)
+    N4(Medical Transcription)
+    N5[Noise Reduction]
+    N6{Phonetic Transcription}
+    N7(Acoustic Modeling)
+    N8[/Call Center Automation/]
+    N9(Accent Recognition)
+    N10(Security Authentication)
+    N11[[Dialect Adaptation]]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Embedded Speech Recognition
+        nest0_0(Children's Speech Recognition)
+        nest0_1[Multimodal Speech Processing]
+        nest0_2[[Robust Speech Recognition]]
+    end
+    subgraph Speech Data Annotation
+        nest1_0[[Voice User Interface Design]]
+        nest1_1[Cloud_based Speech Services]
+        nest1_2(Speaker Identification)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N4 -.-> nest0_0
+    nest0_2 --> N9
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N3 --> |yes| nest1_0
+    nest1_2 --> N5
+    N8 --> S0
+    S0 -.-> N11
+    S0 -.-> N10
+    N6 --> S1
+    S1 --> N9
+    S1 -.-> N8
+    N3 --> S2
+    S2 --> N6
+    S2 --> N7
+    N0 --> M0
+    N2 --> M0
+    M0 --> N4
+    N3 -.-> M1
+    N1 --> M1
+    N2 --> M1
+    M1 -.-> N5
+    style S0 fill:#FFFDE7,stroke:#FFF176
+    style S1 fill:#FFFDE7,stroke:#FFF176
+    style S2 fill:#FFEBEB,stroke:#FFC2C2
+    style M0 fill:#FFFDE7,stroke:#FFF176
+    style M1 fill:#FFFDE7,stroke:#FFF176
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_326.txt b/test/mermaid/hard/mermaid_326.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e2cfb9275af9249c07bf21186c3d868412a94ded
--- /dev/null
+++ b/test/mermaid/hard/mermaid_326.txt
@@ -0,0 +1,36 @@
+<Accent Recognition, connectedTo, Security Authentication>
+<Acoustic Modeling, connectedTo, Call Center Automation>
+<Call Center Automation, connectedTo, Accent Recognition>
+<Call Center Automation, connectedTo, Dialect Adaptation>
+<Call Center Automation, connectedTo, Security Authentication>
+<Children's Speech Recognition, connectedTo, Multimodal Speech Processing>
+<Children's Speech Recognition, partOf, Embedded Speech Recognition>
+<Cloud_based Speech Services, connectedTo, Speaker Identification>
+<Cloud_based Speech Services, partOf, Speech Data Annotation>
+<Emotion Recognition from Voice, connectedTo, Acoustic Modeling>
+<Emotion Recognition from Voice, connectedTo, Medical Transcription>
+<Emotion Recognition from Voice, connectedTo, Noise Reduction>
+<Emotion Recognition from Voice, connectedTo, Phonetic Transcription>
+<Emotion Recognition from Voice, yes, Voice User Interface Design>
+<Feature Extraction, connectedTo, Noise Reduction>
+<Feature Extraction, connectedTo, Speech Emotion Recognition>
+<Medical Transcription, connectedTo, Children's Speech Recognition>
+<Medical Transcription, connectedTo, Noise Reduction>
+<Multimodal Speech Processing, connectedTo, Robust Speech Recognition>
+<Multimodal Speech Processing, partOf, Embedded Speech Recognition>
+<Noise Reduction, connectedTo, Phonetic Transcription>
+<Phonetic Transcription, connectedTo, Accent Recognition>
+<Phonetic Transcription, connectedTo, Acoustic Modeling>
+<Phonetic Transcription, connectedTo, Call Center Automation>
+<Robust Speech Recognition, connectedTo, Accent Recognition>
+<Robust Speech Recognition, partOf, Embedded Speech Recognition>
+<Security Authentication, connectedTo, Dialect Adaptation>
+<Speaker Identification, connectedTo, Noise Reduction>
+<Speaker Identification, partOf, Speech Data Annotation>
+<Speech Emotion Recognition, connectedTo, Emotion Recognition from Voice>
+<Speech Emotion Recognition, connectedTo, Medical Transcription>
+<Speech Emotion Recognition, connectedTo, Noise Reduction>
+<Voice User Interface Design, connectedTo, Cloud_based Speech Services>
+<Voice User Interface Design, partOf, Speech Data Annotation>
+<start, connectedTo, Feature Extraction>
+<start, connectedTo, Medical Transcription>
diff --git a/test/mermaid/hard/mermaid_327.txt b/test/mermaid/hard/mermaid_327.txt
new file mode 100644
index 0000000000000000000000000000000000000000..236fcde7878c056fe1a7f04e19cbca9ceb45e854
--- /dev/null
+++ b/test/mermaid/hard/mermaid_327.txt
@@ -0,0 +1,42 @@
+<Accent Recognition, connectedTo, Contextual Understanding>
+<Accent Recognition, connectedTo, Embedded Speech Recognition>
+<Accent Recognition, connectedTo, Emotion Recognition from Voice>
+<Automatic Speech Recognition, connectedTo, Voice Activity Detection>
+<Call Center Automation, connectedTo, Medical Transcription>
+<Call Center Automation, partOf, Voice User Interface Design>
+<Command and Control, connectedTo, Contextual Understanding>
+<Command and Control, connectedTo, Feature Extraction>
+<Command and Control, no, Emotion Recognition from Voice>
+<Contextual Understanding, connectedTo, Automatic Speech Recognition>
+<Contextual Understanding, connectedTo, Emotion Recognition from Voice>
+<Contextual Understanding, connectedTo, Medical Transcription>
+<Contextual Understanding, connectedTo, Voice Activity Detection>
+<Contextual Understanding, yes, Linguistic Analysis>
+<Embedded Speech Recognition, connectedTo, Real_Time Captioning>
+<Embedded Speech Recognition, partOf, Speech Data Annotation>
+<Emotion Recognition from Voice, connectedTo, Automatic Speech Recognition>
+<Emotion Recognition from Voice, connectedTo, Speech Emotion Recognition>
+<Emotion Recognition from Voice, connectedTo, Voice Activity Detection>
+<Feature Extraction, connectedTo, Contextual Understanding>
+<Feature Extraction, connectedTo, Speaker Diarization>
+<Feature Extraction, yes, Voice Search Optimization>
+<Linguistic Analysis, connectedTo, Emotion Recognition from Voice>
+<Medical Transcription, yes, Automatic Speech Recognition>
+<Phonetic Transcription, connectedTo, Speech_to_Text Conversion>
+<Phonetic Transcription, partOf, Speech Data Annotation>
+<Real_Time Captioning, no, Phonetic Transcription>
+<Real_Time Captioning, partOf, Speech Data Annotation>
+<Robust Speech Recognition, no, Call Center Automation>
+<Robust Speech Recognition, partOf, Voice User Interface Design>
+<Speaker Diarization, connectedTo, Voice Assistant Development>
+<Speaker Diarization, partOf, Voice User Interface Design>
+<Speech Emotion Recognition, connectedTo, Medical Transcription>
+<Speech_to_Text Conversion, connectedTo, Accent Recognition>
+<Speech_to_Text Conversion, partOf, Speech Data Annotation>
+<Voice Assistant Development, partOf, Voice User Interface Design>
+<Voice Assistant Development, yes, Robust Speech Recognition>
+<Voice Search Optimization, connectedTo, Accent Recognition>
+<Voice Search Optimization, connectedTo, Contextual Understanding>
+<Voice Search Optimization, connectedTo, Emotion Recognition from Voice>
+<start, connectedTo, Command and Control>
+<start, connectedTo, Contextual Understanding>
diff --git a/test/mermaid/hard/mermaid_328.mmd b/test/mermaid/hard/mermaid_328.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..8b369e3550dd812554ad0ec0c5a7051a84b35aa4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_328.mmd
@@ -0,0 +1,94 @@
+graph TD
+    N0([start])
+    N1[Concept Extraction]
+    N2[/Text Visualization/]
+    N3[/Relationship Extraction/]
+    N4[[Named Entity Recognition]]
+    N5([Knowledge Graph Construction])
+    N6(Resume Parsing)
+    N7(Regular Expressions for Text)
+    N8[/Information Extraction/]
+    N9(Sentiment Analysis)
+    N10[[Part_of_Speech Tagging]]
+    N11[Document Summarization]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Deep Learning for NLP
+        nest0_0(Corpus Creation)
+        nest0_1([Natural Language Processing])
+    end
+    subgraph Text Clustering
+        nest1_0[Chatbot Development]
+        nest1_1[Legal Document Analysis]
+        nest1_2[/Automated Content Tagging/]
+        nest1_3[Topic Modeling]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> |yes| N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    nest0_0 -.-> nest0_1
+    N4 --> nest0_0
+    nest0_1 -.-> N8
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 -.-> nest1_3
+    N6 -.-> |no| nest1_0
+    nest1_3 --> N6
+    N7 -.-> S0
+    S0 -.-> N9
+    S0 -.-> N10
+    N2 -.-> S1
+    S1 --> N6
+    S1 -.-> N5
+    N0 -.-> |yes| M0
+    N1 -.-> M0
+    M0 --> N3
+    N1 --> M2
+    N0 -.-> M2
+    M2 -.-> N3
+    style S0 fill:#D7CCC8,stroke:#795548
+    style S1 fill:#D7CCC8,stroke:#795548
+    style M0 fill:#F5F5F5,stroke:#BDBDBD
+    style M2 fill:#D7CCC8,stroke:#795548
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_328.txt b/test/mermaid/hard/mermaid_328.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c86b9f39468b90c65ab61d31faa629d41f01116a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_328.txt
@@ -0,0 +1,32 @@
+<Automated Content Tagging, connectedTo, Topic Modeling>
+<Automated Content Tagging, partOf, Text Clustering>
+<Chatbot Development, connectedTo, Legal Document Analysis>
+<Chatbot Development, partOf, Text Clustering>
+<Concept Extraction, connectedTo, Relationship Extraction>
+<Concept Extraction, connectedTo, Text Visualization>
+<Corpus Creation, connectedTo, Natural Language Processing>
+<Corpus Creation, partOf, Deep Learning for NLP>
+<Information Extraction, connectedTo, Sentiment Analysis>
+<Knowledge Graph Construction, yes, Resume Parsing>
+<Legal Document Analysis, connectedTo, Automated Content Tagging>
+<Legal Document Analysis, partOf, Text Clustering>
+<Named Entity Recognition, connectedTo, Corpus Creation>
+<Named Entity Recognition, connectedTo, Knowledge Graph Construction>
+<Natural Language Processing, connectedTo, Information Extraction>
+<Natural Language Processing, partOf, Deep Learning for NLP>
+<Part_of_Speech Tagging, connectedTo, Document Summarization>
+<Regular Expressions for Text, connectedTo, Information Extraction>
+<Regular Expressions for Text, connectedTo, Part_of_Speech Tagging>
+<Regular Expressions for Text, connectedTo, Sentiment Analysis>
+<Relationship Extraction, connectedTo, Named Entity Recognition>
+<Resume Parsing, connectedTo, Regular Expressions for Text>
+<Resume Parsing, no, Chatbot Development>
+<Sentiment Analysis, connectedTo, Part_of_Speech Tagging>
+<Text Visualization, connectedTo, Knowledge Graph Construction>
+<Text Visualization, connectedTo, Relationship Extraction>
+<Text Visualization, connectedTo, Resume Parsing>
+<Topic Modeling, connectedTo, Resume Parsing>
+<Topic Modeling, partOf, Text Clustering>
+<start, connectedTo, Concept Extraction>
+<start, connectedTo, Relationship Extraction>
+<start, yes, Relationship Extraction>
diff --git a/test/mermaid/hard/mermaid_329.mmd b/test/mermaid/hard/mermaid_329.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..a0d8ea584344c25d9875f297fa23a83d923d8c5b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_329.mmd
@@ -0,0 +1,120 @@
+graph TD
+    N0([Language Translation for Text Mining])
+    N1([Concept Extraction])
+    N2(Relationship Extraction)
+    N3(Biomedical Text Mining)
+    N4[(Automated Content Tagging)]
+    N5(Document Summarization)
+    N6[(Data Cleaning for Text)]
+    N7[(Chatbot Development)]
+    N8[[Text Similarity Analysis]]
+    N9[[Sentiment Analysis]]
+    N10[[Legal Document Analysis]]
+    N11[Patent Analysis]
+    N12[[Topic Modeling]]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Text Classification
+        nest0_0(Customer Feedback Analysis)
+        nest0_1(Tokenization)
+    end
+    subgraph Annotation Tools
+        nest1_0[[Named Entity Recognition]]
+        nest1_1[[Spam Detection]]
+        nest1_2([Author Attribution])
+        nest1_3[(Text Clustering)]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    nest0_0 --> nest0_1
+    N6 -.-> nest0_0
+    nest0_1 -.-> N1
+    nest1_0 -.-> |data_collects| nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N7 --> nest1_0
+    nest1_3 -.-> N6
+    N4 -.-> S0
+    S0 --> N10
+    S0 --> N11
+    N6 -.-> S1
+    S1 -.-> N10
+    S1 --> N12
+    S1 -.-> N9
+    N1 --> M0
+    N3 --> M0
+    N0 -.-> M0
+    M0 -.-> N5
+    N2 --> M2
+    N0 --> M2
+    M2 -.-> N5
+    style N0 fill:#D0EFEE,stroke:#73C6BC
+    style N1 fill:#D0EFEE,stroke:#73C6BC
+    style N2 fill:#F3E5F5,stroke:#AB47BC
+    style N3 fill:#F3E5F5,stroke:#AB47BC
+    style N4 fill:#F3E5F5,stroke:#AB47BC
+    style N5 fill:#DDCEDD,stroke:#AF56A6
+    style N6 fill:#DDCEDD,stroke:#AF56A6
+    style N7 fill:#D0EFEE,stroke:#73C6BC
+    style N8 fill:#F3E5F5,stroke:#AB47BC
+    style N9 fill:#DDCEDD,stroke:#AF56A6
+    style N10 fill:#DDCEDD,stroke:#AF56A6
+    style N11 fill:#F3E5F5,stroke:#AB47BC
+    style N12 fill:#DDCEDD,stroke:#AF56A6
+    style S0 fill:#D0EFEE,stroke:#73C6BC
+    style S1 fill:#F3E5F5,stroke:#AB47BC
+    style M0 fill:#DDCEDD,stroke:#AF56A6
+    style M2 fill:#F3E5F5,stroke:#AB47BC
+    style nest0_0 fill:#DDCEDD,stroke:#AF56A6
+    style nest0_1 fill:#D0EFEE,stroke:#73C6BC
+    style nest1_0 fill:#D0EFEE,stroke:#73C6BC
+    style nest1_1 fill:#DDCEDD,stroke:#AF56A6
+    style nest1_2 fill:#F3E5F5,stroke:#AB47BC
+    style nest1_3 fill:#F3E5F5,stroke:#AB47BC
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_329.txt b/test/mermaid/hard/mermaid_329.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b32bb9fe6ac8d96c235058d00e9faa601aa11356
--- /dev/null
+++ b/test/mermaid/hard/mermaid_329.txt
@@ -0,0 +1,35 @@
+<Author Attribution, connectedTo, Text Clustering>
+<Author Attribution, partOf, Annotation Tools>
+<Automated Content Tagging, connectedTo, Document Summarization>
+<Automated Content Tagging, connectedTo, Legal Document Analysis>
+<Automated Content Tagging, connectedTo, Patent Analysis>
+<Biomedical Text Mining, connectedTo, Automated Content Tagging>
+<Biomedical Text Mining, connectedTo, Document Summarization>
+<Chatbot Development, connectedTo, Named Entity Recognition>
+<Chatbot Development, connectedTo, Text Similarity Analysis>
+<Concept Extraction, connectedTo, Document Summarization>
+<Concept Extraction, connectedTo, Relationship Extraction>
+<Customer Feedback Analysis, connectedTo, Tokenization>
+<Customer Feedback Analysis, partOf, Text Classification>
+<Data Cleaning for Text, connectedTo, Chatbot Development>
+<Data Cleaning for Text, connectedTo, Customer Feedback Analysis>
+<Data Cleaning for Text, connectedTo, Legal Document Analysis>
+<Data Cleaning for Text, connectedTo, Sentiment Analysis>
+<Data Cleaning for Text, connectedTo, Topic Modeling>
+<Document Summarization, connectedTo, Data Cleaning for Text>
+<Language Translation for Text Mining, connectedTo, Concept Extraction>
+<Language Translation for Text Mining, connectedTo, Document Summarization>
+<Legal Document Analysis, connectedTo, Patent Analysis>
+<Named Entity Recognition, data_collects, Spam Detection>
+<Named Entity Recognition, partOf, Annotation Tools>
+<Patent Analysis, connectedTo, Topic Modeling>
+<Relationship Extraction, connectedTo, Biomedical Text Mining>
+<Relationship Extraction, connectedTo, Document Summarization>
+<Sentiment Analysis, connectedTo, Legal Document Analysis>
+<Spam Detection, connectedTo, Author Attribution>
+<Spam Detection, partOf, Annotation Tools>
+<Text Clustering, connectedTo, Data Cleaning for Text>
+<Text Clustering, partOf, Annotation Tools>
+<Text Similarity Analysis, connectedTo, Sentiment Analysis>
+<Tokenization, connectedTo, Concept Extraction>
+<Tokenization, partOf, Text Classification>
diff --git a/test/mermaid/hard/mermaid_33.mmd b/test/mermaid/hard/mermaid_33.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..97701e4d758c06f6a351b4b4f2907f053d10465e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_33.mmd
@@ -0,0 +1,144 @@
+graph TD
+    N0([start])
+    N1(Farm Maintenance)
+    N2[/Precision Farming/]
+    N3{Subsidy Application}
+    N4([Drone Scouting])
+    N5([Animal Health Monitoring])
+    N6[Livestock Feeding]
+    N7[/Forestry Management/]
+    N8(Agricultural Research)
+    N9{Weather Tracking}
+    N10[Soil Testing]
+    N11(Grain Drying)
+    N12([Traceability System])
+    N13[/Harvesting/]
+    N14{Aquaculture Farming}
+    N15(Organic Certification)
+    N16[Irrigation Scheduling]
+    N17([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Market Transportation
+        nest0_0[Pest Spraying]
+        nest0_1[Seed Sowing]
+        nest0_2[Hydroponic System Management]
+    end
+    subgraph Packaging for Sale
+        nest1_0(Seedling Transplanting)
+        nest1_1(Disease Detection)
+        nest1_2([Yield Prediction])
+        nest1_3([Fencing Installation])
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 --> N13
+    N13 --> N14
+    N14 -.-> N15
+    N15 -.-> N16
+    N16 --> N17
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N4 --> nest0_0
+    nest0_2 -.-> N5
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N1 --> nest1_0
+    nest1_3 -.-> N12
+    N2 --> S0
+    S0 --> N16
+    S0 --> N12
+    S0 --> N4
+    S0 --> N14
+    N6 --> S1
+    S1 --> N17
+    S1 -.-> N9
+    N1 --> M0
+    N8 --> M0
+    M0 --> N10
+    N1 -.-> M1
+    N0 -.-> M1
+    M1 -.-> N5
+    style N0 fill:#E8F0FF,stroke:#A2D0FF
+    style N1 fill:#E8F0FF,stroke:#A2D0FF
+    style N2 fill:#F8FDD3,stroke:#D3EB9F
+    style N3 fill:#F8FDD3,stroke:#D3EB9F
+    style N4 fill:#F8FDD3,stroke:#D3EB9F
+    style N5 fill:#D0E0F8,stroke:#4285F4
+    style N6 fill:#F8FDD3,stroke:#D3EB9F
+    style N7 fill:#D0E0F8,stroke:#4285F4
+    style N8 fill:#D0E0F8,stroke:#4285F4
+    style N9 fill:#D0E0F8,stroke:#4285F4
+    style N10 fill:#E8F0FF,stroke:#A2D0FF
+    style N11 fill:#D0E0F8,stroke:#4285F4
+    style N12 fill:#F8FDD3,stroke:#D3EB9F
+    style N13 fill:#E8F0FF,stroke:#A2D0FF
+    style N14 fill:#E8F0FF,stroke:#A2D0FF
+    style N15 fill:#E8F0FF,stroke:#A2D0FF
+    style N16 fill:#D0E0F8,stroke:#4285F4
+    style N17 fill:#D0E0F8,stroke:#4285F4
+    style S0 fill:#E8F0FF,stroke:#A2D0FF
+    style S1 fill:#E8F0FF,stroke:#A2D0FF
+    style M0 fill:#D0E0F8,stroke:#4285F4
+    style M1 fill:#F8FDD3,stroke:#D3EB9F
+    style nest0_0 fill:#D0E0F8,stroke:#4285F4
+    style nest0_1 fill:#D0E0F8,stroke:#4285F4
+    style nest0_2 fill:#D0E0F8,stroke:#4285F4
+    style nest1_0 fill:#F8FDD3,stroke:#D3EB9F
+    style nest1_1 fill:#D0E0F8,stroke:#4285F4
+    style nest1_2 fill:#E8F0FF,stroke:#A2D0FF
+    style nest1_3 fill:#D0E0F8,stroke:#4285F4
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#D3EB9F,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_33.txt b/test/mermaid/hard/mermaid_33.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e891ed49751a1ac10e6acfcfc17660b0cb118eaa
--- /dev/null
+++ b/test/mermaid/hard/mermaid_33.txt
@@ -0,0 +1,43 @@
+<Agricultural Research, connectedTo, Soil Testing>
+<Agricultural Research, connectedTo, Weather Tracking>
+<Animal Health Monitoring, connectedTo, Livestock Feeding>
+<Aquaculture Farming, connectedTo, Organic Certification>
+<Disease Detection, connectedTo, Yield Prediction>
+<Disease Detection, partOf, Packaging for Sale>
+<Drone Scouting, connectedTo, Animal Health Monitoring>
+<Drone Scouting, connectedTo, Pest Spraying>
+<Farm Maintenance, connectedTo, Animal Health Monitoring>
+<Farm Maintenance, connectedTo, Precision Farming>
+<Farm Maintenance, connectedTo, Seedling Transplanting>
+<Farm Maintenance, connectedTo, Soil Testing>
+<Fencing Installation, connectedTo, Traceability System>
+<Fencing Installation, partOf, Packaging for Sale>
+<Forestry Management, connectedTo, Agricultural Research>
+<Grain Drying, connectedTo, Traceability System>
+<Harvesting, connectedTo, Aquaculture Farming>
+<Hydroponic System Management, connectedTo, Animal Health Monitoring>
+<Hydroponic System Management, partOf, Market Transportation>
+<Irrigation Scheduling, connectedTo, end>
+<Livestock Feeding, connectedTo, Forestry Management>
+<Livestock Feeding, connectedTo, Weather Tracking>
+<Livestock Feeding, connectedTo, end>
+<Organic Certification, connectedTo, Irrigation Scheduling>
+<Pest Spraying, connectedTo, Seed Sowing>
+<Pest Spraying, partOf, Market Transportation>
+<Precision Farming, connectedTo, Aquaculture Farming>
+<Precision Farming, connectedTo, Drone Scouting>
+<Precision Farming, connectedTo, Irrigation Scheduling>
+<Precision Farming, connectedTo, Subsidy Application>
+<Precision Farming, connectedTo, Traceability System>
+<Seed Sowing, connectedTo, Hydroponic System Management>
+<Seed Sowing, partOf, Market Transportation>
+<Seedling Transplanting, connectedTo, Disease Detection>
+<Seedling Transplanting, partOf, Packaging for Sale>
+<Soil Testing, connectedTo, Grain Drying>
+<Subsidy Application, connectedTo, Drone Scouting>
+<Traceability System, connectedTo, Harvesting>
+<Weather Tracking, connectedTo, Soil Testing>
+<Yield Prediction, connectedTo, Fencing Installation>
+<Yield Prediction, partOf, Packaging for Sale>
+<start, connectedTo, Animal Health Monitoring>
+<start, connectedTo, Farm Maintenance>
diff --git a/test/mermaid/hard/mermaid_331.mmd b/test/mermaid/hard/mermaid_331.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..63fd1a612a1f166496dd6b83755d89f1c22a9011
--- /dev/null
+++ b/test/mermaid/hard/mermaid_331.mmd
@@ -0,0 +1,128 @@
+graph BT
+    N0([Predictive Maintenance])
+    N1[[Real_Time Data Streaming]]
+    N2[/Anomaly Detection/]
+    N3[(Data Governance for Twins)]
+    N4(Remote Control Capabilities)
+    N5[Autonomous Operations]
+    N6[[Maintenance Scheduling]]
+    N7[/Automotive Digital Twins/]
+    N8[Model Creation]
+    N9{Condition Monitoring}
+    N10[Enterprise Asset Management Integration]
+    N11[Historical Data Analysis]
+    N12[/Performance Monitoring/]
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Data Security for Digital Twins
+        nest0_0([Building Information Modeling Integration])
+        nest0_1[/Operational Planning/]
+        nest0_2[(Simulation and Prediction)]
+    end
+    subgraph Healthcare Digital Twins
+        nest1_0{Aerospace Digital Twins}
+        nest1_1[Virtual Prototyping]
+        nest1_2([Virtual Reality Interaction])
+        nest1_3(Scalability of Models)
+    end
+    N0 -.-> N1
+    N1 -.-> |performance_tracks| N2
+    N2 -.-> N3
+    N3 -.-> |troubleshoots| N4
+    N4 -.-> N5
+    N5 -.-> |predicts| N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 --> N12
+    nest0_0 --> nest0_1
+    nest0_1 -.-> |operations_streamlines| nest0_2
+    N2 -.-> nest0_0
+    nest0_2 --> N4
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> |AI_applies| nest1_3
+    N6 -.-> nest1_0
+    nest1_3 --> N5
+    N5 -.-> S1
+    S1 --> N10
+    S1 -.-> N11
+    S1 --> N8
+    S1 --> |monitors| N7
+    N0 -.-> M0
+    N1 -.-> M0
+    N7 --> M0
+    M0 --> N10
+    N3 --> M1
+    N2 --> M1
+    N1 --> M1
+    M1 -.-> N5
+    N4 -.-> M2
+    N0 -.-> M2
+    M2 --> N6
+    style N0 fill:#F1F8E9,stroke:#81C784
+    style N1 fill:#FCFCE7,stroke:#DCE775
+    style N2 fill:#F1F8E9,stroke:#81C784
+    style N3 fill:#FFEBEE,stroke:#E57373
+    style N4 fill:#FCFCE7,stroke:#DCE775
+    style N5 fill:#FFEBEE,stroke:#E57373
+    style N6 fill:#FFEBEE,stroke:#E57373
+    style N7 fill:#F1F8E9,stroke:#81C784
+    style N8 fill:#FFEBEE,stroke:#E57373
+    style N9 fill:#F1F8E9,stroke:#81C784
+    style N10 fill:#FFEBEE,stroke:#E57373
+    style N11 fill:#FCFCE7,stroke:#DCE775
+    style N12 fill:#F1F8E9,stroke:#81C784
+    style S1 fill:#FCFCE7,stroke:#DCE775
+    style M0 fill:#FCFCE7,stroke:#DCE775
+    style M1 fill:#F1F8E9,stroke:#81C784
+    style M2 fill:#FFEBEE,stroke:#E57373
+    style nest0_0 fill:#FCFCE7,stroke:#DCE775
+    style nest0_1 fill:#FFEBEE,stroke:#E57373
+    style nest0_2 fill:#FCFCE7,stroke:#DCE775
+    style nest1_0 fill:#FFEBEE,stroke:#E57373
+    style nest1_1 fill:#F1F8E9,stroke:#81C784
+    style nest1_2 fill:#F1F8E9,stroke:#81C784
+    style nest1_3 fill:#F1F8E9,stroke:#81C784
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#E57373,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#DCE775,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_331.txt b/test/mermaid/hard/mermaid_331.txt
new file mode 100644
index 0000000000000000000000000000000000000000..3d4d356ad2c20913f021efb1f5836dbd25e7a8c4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_331.txt
@@ -0,0 +1,40 @@
+<Aerospace Digital Twins, connectedTo, Virtual Prototyping>
+<Aerospace Digital Twins, partOf, Healthcare Digital Twins>
+<Anomaly Detection, connectedTo, Autonomous Operations>
+<Anomaly Detection, connectedTo, Building Information Modeling Integration>
+<Anomaly Detection, connectedTo, Data Governance for Twins>
+<Automotive Digital Twins, connectedTo, Enterprise Asset Management Integration>
+<Automotive Digital Twins, connectedTo, Model Creation>
+<Autonomous Operations, connectedTo, Enterprise Asset Management Integration>
+<Autonomous Operations, connectedTo, Historical Data Analysis>
+<Autonomous Operations, connectedTo, Model Creation>
+<Autonomous Operations, monitors, Automotive Digital Twins>
+<Autonomous Operations, predicts, Maintenance Scheduling>
+<Building Information Modeling Integration, connectedTo, Operational Planning>
+<Building Information Modeling Integration, partOf, Data Security for Digital Twins>
+<Condition Monitoring, connectedTo, Enterprise Asset Management Integration>
+<Data Governance for Twins, connectedTo, Autonomous Operations>
+<Data Governance for Twins, troubleshoots, Remote Control Capabilities>
+<Enterprise Asset Management Integration, connectedTo, Historical Data Analysis>
+<Historical Data Analysis, connectedTo, Performance Monitoring>
+<Maintenance Scheduling, connectedTo, Aerospace Digital Twins>
+<Maintenance Scheduling, connectedTo, Automotive Digital Twins>
+<Model Creation, connectedTo, Condition Monitoring>
+<Operational Planning, operations_streamlines, Simulation and Prediction>
+<Operational Planning, partOf, Data Security for Digital Twins>
+<Predictive Maintenance, connectedTo, Enterprise Asset Management Integration>
+<Predictive Maintenance, connectedTo, Maintenance Scheduling>
+<Predictive Maintenance, connectedTo, Real_Time Data Streaming>
+<Real_Time Data Streaming, connectedTo, Autonomous Operations>
+<Real_Time Data Streaming, connectedTo, Enterprise Asset Management Integration>
+<Real_Time Data Streaming, performance_tracks, Anomaly Detection>
+<Remote Control Capabilities, connectedTo, Autonomous Operations>
+<Remote Control Capabilities, connectedTo, Maintenance Scheduling>
+<Scalability of Models, connectedTo, Autonomous Operations>
+<Scalability of Models, partOf, Healthcare Digital Twins>
+<Simulation and Prediction, connectedTo, Remote Control Capabilities>
+<Simulation and Prediction, partOf, Data Security for Digital Twins>
+<Virtual Prototyping, connectedTo, Virtual Reality Interaction>
+<Virtual Prototyping, partOf, Healthcare Digital Twins>
+<Virtual Reality Interaction, AI_applies, Scalability of Models>
+<Virtual Reality Interaction, partOf, Healthcare Digital Twins>
diff --git a/test/mermaid/hard/mermaid_332.txt b/test/mermaid/hard/mermaid_332.txt
new file mode 100644
index 0000000000000000000000000000000000000000..1370bfb9cf3e8e5e22c1b6c200b093a6599f483b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_332.txt
@@ -0,0 +1,37 @@
+<AI or ML Model Integration, connectedTo, Autonomous Operations>
+<AI or ML Model Integration, partOf, Lifecycle Management>
+<Aerospace Digital Twins, connectedTo, Edge Computing for Twins>
+<Aerospace Digital Twins, connectedTo, Model Creation>
+<Aerospace Digital Twins, connectedTo, Performance Monitoring>
+<Aerospace Digital Twins, connectedTo, Smart City Planning>
+<Automotive Digital Twins, connectedTo, Edge Computing for Twins>
+<Autonomous Operations, connectedTo, Cyber_Physical Systems>
+<Autonomous Operations, creates, Simulation and Prediction>
+<Cyber_Physical Systems, connectedTo, Interoperability Standards>
+<Cyber_Physical Systems, partOf, Data Governance for Twins>
+<Design Validation, connectedTo, Autonomous Operations>
+<Edge Computing for Twins, operations_streamlines, Model Creation>
+<Energy Consumption Optimization, connectedTo, Aerospace Digital Twins>
+<Energy Consumption Optimization, connectedTo, Automotive Digital Twins>
+<Energy Consumption Optimization, connectedTo, IoT Data Ingestion>
+<Energy Consumption Optimization, connectedTo, Model Creation>
+<Energy Consumption Optimization, connectedTo, Smart City Planning>
+<Enterprise Asset Management Integration, connectedTo, AI or ML Model Integration>
+<Enterprise Asset Management Integration, partOf, Lifecycle Management>
+<Interoperability Standards, connectedTo, Energy Consumption Optimization>
+<Interoperability Standards, partOf, Data Governance for Twins>
+<IoT Data Ingestion, connectedTo, Remote Control Capabilities>
+<Model Creation, connectedTo, Performance Monitoring>
+<Model Creation, connectedTo, Scalability of Models>
+<Performance Monitoring, connectedTo, IoT Data Ingestion>
+<Remote Control Capabilities, connectedTo, Design Validation>
+<Scalability of Models, connectedTo, Enterprise Asset Management Integration>
+<Scalability of Models, partOf, Lifecycle Management>
+<Smart City Planning, connectedTo, Automotive Digital Twins>
+<Smart City Planning, processes_improves, Performance Monitoring>
+<Smart Manufacturing, connectedTo, Edge Computing for Twins>
+<Smart Manufacturing, connectedTo, Model Creation>
+<Smart Manufacturing, connectedTo, Performance Monitoring>
+<Smart Manufacturing, connectedTo, What_If Scenario Analysis>
+<What_If Scenario Analysis, connectedTo, Energy Consumption Optimization>
+<What_If Scenario Analysis, connectedTo, Model Creation>
diff --git a/test/mermaid/hard/mermaid_333.mmd b/test/mermaid/hard/mermaid_333.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..d67af656d8f08e0de151b8b116422bb483ac1310
--- /dev/null
+++ b/test/mermaid/hard/mermaid_333.mmd
@@ -0,0 +1,126 @@
+graph BT
+    N0([Model Creation])
+    N1[What_If Scenario Analysis]
+    N2(Smart Manufacturing)
+    N3(Autonomous Operations)
+    N4(Simulation Platform Development)
+    N5[(Anomaly Detection)]
+    N6{Aerospace Digital Twins}
+    N7[Real_Time Data Streaming]
+    N8(IoT Data Ingestion)
+    N9{Digital Twin Lifecycle Management}
+    N10([Lifecycle Management])
+    N11([Augmented Reality Visualization])
+    N12[(Cyber_Physical Systems)]
+    N13(AI or ML Model Integration)
+    N14(Smart City Planning)
+    N15([Virtual Prototyping])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Edge Computing for Twins
+        nest0_0[[Operational Planning]]
+        nest0_1[Performance Monitoring]
+        nest0_2(Simulation and Prediction)
+    end
+    subgraph Data Security for Digital Twins
+        nest1_0[[Enterprise Asset Management Integration]]
+        nest1_1(Healthcare Digital Twins)
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> |repairs| N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 --> N14
+    N14 --> N15
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N14 -.-> nest0_0
+    nest0_2 --> N11
+    nest1_0 --> nest1_1
+    N3 --> nest1_0
+    nest1_1 --> |simulates| N6
+    N4 -.-> S0
+    S0 -.-> N7
+    S0 -.-> N6
+    N8 -.-> S1
+    S1 -.-> N15
+    S1 -.-> |environments_monitors| N13
+    N1 -.-> S2
+    S2 -.-> N13
+    S2 -.-> N9
+    S2 --> N10
+    N9 --> M1
+    N6 -.-> M1
+    M1 -.-> N15
+    style N0 fill:#ECCFF5,stroke:#CD8FF2
+    style N1 fill:#FFFDE0,stroke:#FFF8A6
+    style N2 fill:#ECCFF5,stroke:#CD8FF2
+    style N3 fill:#ECCFF5,stroke:#CD8FF2
+    style N4 fill:#FBE9E7,stroke:#FF8A65
+    style N5 fill:#FFFDE0,stroke:#FFF8A6
+    style N6 fill:#FFFDE0,stroke:#FFF8A6
+    style N7 fill:#FBE9E7,stroke:#FF8A65
+    style N8 fill:#ECCFF5,stroke:#CD8FF2
+    style N9 fill:#FFFDE0,stroke:#FFF8A6
+    style N10 fill:#ECCFF5,stroke:#CD8FF2
+    style N11 fill:#FFFDE0,stroke:#FFF8A6
+    style N12 fill:#ECCFF5,stroke:#CD8FF2
+    style N13 fill:#ECCFF5,stroke:#CD8FF2
+    style N14 fill:#FBE9E7,stroke:#FF8A65
+    style N15 fill:#ECCFF5,stroke:#CD8FF2
+    style S0 fill:#ECCFF5,stroke:#CD8FF2
+    style S1 fill:#FFFDE0,stroke:#FFF8A6
+    style S2 fill:#FFFDE0,stroke:#FFF8A6
+    style M1 fill:#ECCFF5,stroke:#CD8FF2
+    style nest0_0 fill:#ECCFF5,stroke:#CD8FF2
+    style nest0_1 fill:#FFFDE0,stroke:#FFF8A6
+    style nest0_2 fill:#FFFDE0,stroke:#FFF8A6
+    style nest1_0 fill:#FFFDE0,stroke:#FFF8A6
+    style nest1_1 fill:#FBE9E7,stroke:#FF8A65
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#CD8FF2,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_334.mmd b/test/mermaid/hard/mermaid_334.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..4ea79b5c2d392474331edb9f832db2f6090bef97
--- /dev/null
+++ b/test/mermaid/hard/mermaid_334.mmd
@@ -0,0 +1,134 @@
+graph RL
+    N0([start])
+    N1[Email Automation]
+    N2{Workflow Automation Platforms}
+    N3{IT Operations Automation}
+    N4{Process Mining}
+    N5[Audit Trail for Automation]
+    N6(Automated Data Validation)
+    N7[/Robotic Process Automation Implementation/]
+    N8(Document Processing Automation)
+    N9([Error Handling in Automation])
+    N10[Business Process Management]
+    N11[(Hyperautomation)]
+    N12[Scripting for Automation]
+    N13[Task Automation]
+    N14([Chatbot Integration])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Workflow Analysis
+        nest0_0[Orchestration of Processes]
+        nest0_1[[Security for Automation Bots]]
+        nest0_2[(Business Rule Engines)]
+    end
+    subgraph Finance Process Automation
+        nest1_0[[Automated Testing]]
+        nest1_1([Natural Language Processing for Automation])
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> |integrates_systems| N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> |automates| N10
+    N10 --> N11
+    N11 --> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    nest0_0 --> nest0_1
+    nest0_1 -.-> |increases_efficiency| nest0_2
+    N3 --> nest0_0
+    nest0_2 -.-> N8
+    nest1_0 --> nest1_1
+    N4 --> nest1_0
+    nest1_1 -.-> N10
+    N3 --> S0
+    S0 -.-> N12
+    S0 --> N8
+    S0 --> N11
+    N6 -.-> S1
+    S1 -.-> N14
+    S1 --> N8
+    S1 --> N13
+    S1 --> N11
+    N7 -.-> S2
+    S2 -.-> N14
+    S2 --> N12
+    N8 --> M0
+    N5 --> M0
+    M0 --> N11
+    N0 --> M1
+    N1 --> M1
+    M1 --> N3
+    style N0 fill:#EDE7F6,stroke:#9575CD
+    style N1 fill:#FFFDE0,stroke:#FFF8A6
+    style N2 fill:#EDE7F6,stroke:#9575CD
+    style N3 fill:#C5CAE9,stroke:#3F51B5
+    style N4 fill:#EDE7F6,stroke:#9575CD
+    style N5 fill:#FFFDE0,stroke:#FFF8A6
+    style N6 fill:#EDE7F6,stroke:#9575CD
+    style N7 fill:#C5CAE9,stroke:#3F51B5
+    style N8 fill:#FFFDE0,stroke:#FFF8A6
+    style N9 fill:#C5CAE9,stroke:#3F51B5
+    style N10 fill:#FFFDE0,stroke:#FFF8A6
+    style N11 fill:#C5CAE9,stroke:#3F51B5
+    style N12 fill:#EDE7F6,stroke:#9575CD
+    style N13 fill:#FFFDE0,stroke:#FFF8A6
+    style N14 fill:#EDE7F6,stroke:#9575CD
+    style S0 fill:#C5CAE9,stroke:#3F51B5
+    style S1 fill:#EDE7F6,stroke:#9575CD
+    style S2 fill:#FFFDE0,stroke:#FFF8A6
+    style M0 fill:#EDE7F6,stroke:#9575CD
+    style M1 fill:#EDE7F6,stroke:#9575CD
+    style nest0_0 fill:#FFFDE0,stroke:#FFF8A6
+    style nest0_1 fill:#C5CAE9,stroke:#3F51B5
+    style nest0_2 fill:#C5CAE9,stroke:#3F51B5
+    style nest1_0 fill:#EDE7F6,stroke:#9575CD
+    style nest1_1 fill:#C5CAE9,stroke:#3F51B5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#3F51B5,stroke-width:2px,fill:none;
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+    linkStyle 13 stroke:#9575CD,stroke-width:2px,fill:none;
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+    linkStyle 15 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#3F51B5,stroke-width:2px,fill:none;
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+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
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+    linkStyle 29 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#9575CD,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_335.mmd b/test/mermaid/hard/mermaid_335.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..bc3f345d018d846ae0ee6fc09524256f94d804e9
--- /dev/null
+++ b/test/mermaid/hard/mermaid_335.mmd
@@ -0,0 +1,101 @@
+graph BT
+    N0([start])
+    N1(Customer Service Automation)
+    N2[/Robotic Process Automation Implementation/]
+    N3{Orchestration of Processes}
+    N4(Performance Monitoring of Bots)
+    N5([Compliance in Automation])
+    N6(Low_Code or No_Code Automation)
+    N7[Scripting for Automation]
+    N8[[API Automation]]
+    N9(Integration with Existing Systems)
+    N10(Chatbot Integration)
+    N11[Task Automation]
+    N12[Optical Character Recognition for Automation]
+    N13([end])
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Supply Chain Automation
+        nest0_0[(IT Operations Automation)]
+        nest0_1[Finance Process Automation]
+        nest0_2([Error Handling in Automation])
+        nest0_3[Workflow Analysis]
+    end
+    subgraph Data Entry Automation
+        nest1_0[Change Management for Automation]
+        nest1_1(Process Mapping)
+        nest1_2[Security for Automation Bots]
+    end
+    N0 -.-> N1
+    N1 -.-> |no| N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N1 --> nest0_0
+    nest0_3 --> N8
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N1 --> nest1_0
+    nest1_2 -.-> N11
+    N5 -.-> S1
+    S1 --> N9
+    S1 --> N12
+    S1 --> N8
+    S1 -.-> N13
+    N4 -.-> M0
+    N3 --> M0
+    N0 --> M0
+    M0 -.-> N6
+    N7 -.-> M1
+    N10 -.-> M1
+    M1 --> N12
+    style S1 fill:#FFF9C4,stroke:#FFEB3B
+    style M0 fill:#D7CCC8,stroke:#795548
+    style M1 fill:#C9F0F0,stroke:#4DD0E1
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#4DD0E1,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_335.txt b/test/mermaid/hard/mermaid_335.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b10eadc554c3ab84bdf860823b60c1273a77a674
--- /dev/null
+++ b/test/mermaid/hard/mermaid_335.txt
@@ -0,0 +1,38 @@
+<API Automation, connectedTo, Integration with Existing Systems>
+<Change Management for Automation, connectedTo, Process Mapping>
+<Change Management for Automation, partOf, Data Entry Automation>
+<Chatbot Integration, connectedTo, Optical Character Recognition for Automation>
+<Chatbot Integration, connectedTo, Task Automation>
+<Compliance in Automation, connectedTo, API Automation>
+<Compliance in Automation, connectedTo, Integration with Existing Systems>
+<Compliance in Automation, connectedTo, Low_Code or No_Code Automation>
+<Compliance in Automation, connectedTo, Optical Character Recognition for Automation>
+<Compliance in Automation, connectedTo, end>
+<Customer Service Automation, connectedTo, Change Management for Automation>
+<Customer Service Automation, connectedTo, IT Operations Automation>
+<Customer Service Automation, no, Robotic Process Automation Implementation>
+<Error Handling in Automation, connectedTo, Workflow Analysis>
+<Error Handling in Automation, partOf, Supply Chain Automation>
+<Finance Process Automation, connectedTo, Error Handling in Automation>
+<Finance Process Automation, partOf, Supply Chain Automation>
+<IT Operations Automation, connectedTo, Finance Process Automation>
+<IT Operations Automation, partOf, Supply Chain Automation>
+<Integration with Existing Systems, connectedTo, Chatbot Integration>
+<Low_Code or No_Code Automation, connectedTo, Scripting for Automation>
+<Optical Character Recognition for Automation, connectedTo, end>
+<Orchestration of Processes, connectedTo, Low_Code or No_Code Automation>
+<Orchestration of Processes, connectedTo, Performance Monitoring of Bots>
+<Performance Monitoring of Bots, connectedTo, Compliance in Automation>
+<Performance Monitoring of Bots, connectedTo, Low_Code or No_Code Automation>
+<Process Mapping, connectedTo, Security for Automation Bots>
+<Process Mapping, partOf, Data Entry Automation>
+<Robotic Process Automation Implementation, connectedTo, Orchestration of Processes>
+<Scripting for Automation, connectedTo, API Automation>
+<Scripting for Automation, connectedTo, Optical Character Recognition for Automation>
+<Security for Automation Bots, connectedTo, Task Automation>
+<Security for Automation Bots, partOf, Data Entry Automation>
+<Task Automation, connectedTo, Optical Character Recognition for Automation>
+<Workflow Analysis, connectedTo, API Automation>
+<Workflow Analysis, partOf, Supply Chain Automation>
+<start, connectedTo, Customer Service Automation>
+<start, connectedTo, Low_Code or No_Code Automation>
diff --git a/test/mermaid/hard/mermaid_336.mmd b/test/mermaid/hard/mermaid_336.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..089364d9d2ff94011b7fba25793237304398e528
--- /dev/null
+++ b/test/mermaid/hard/mermaid_336.mmd
@@ -0,0 +1,154 @@
+graph RL
+    N0([Data Entry Automation])
+    N1[(API Automation)]
+    N2(Compliance in Automation)
+    N3{Chatbot Integration}
+    N4{Hyperautomation}
+    N5(Change Management for Automation)
+    N6[[Intelligent Automation]]
+    N7(User Training for Automated Systems)
+    N8(Business Rule Engines)
+    N9[Automation Opportunity Identification]
+    N10[(Robotic Process Automation Implementation)]
+    N11(Customer Service Automation)
+    N12([Integration with Existing Systems])
+    N13([Automated Data Validation])
+    N14[Orchestration of Processes]
+    N15(Performance Monitoring of Bots)
+    N16[Email Automation]
+    N17([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Workflow Automation Platforms
+        nest0_0([Decision Automation])
+        nest0_1([Business Process Management])
+    end
+    subgraph Natural Language Processing for Automation
+        nest1_0([Return on Investment Calculation])
+        nest1_1[(Audit Trail for Automation)]
+        nest1_2[(Task Automation)]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    N15 --> N16
+    N16 --> N17
+    nest0_0 -.-> nest0_1
+    N8 --> nest0_0
+    nest0_1 -.-> N8
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> |tracks| nest1_2
+    N6 -.-> nest1_0
+    nest1_2 --> N6
+    N0 --> S0
+    S0 -.-> N7
+    S0 -.-> N4
+    S0 -.-> N13
+    S0 --> N8
+    N0 -.-> S1
+    S1 --> N15
+    S1 -.-> N7
+    S1 --> |supports| N6
+    N6 --> M0
+    N2 -.-> M0
+    N4 -.-> M0
+    N5 -.-> |errors_detects| M0
+    M0 -.-> N8
+    N10 -.-> M1
+    N1 -.-> M1
+    N9 -.-> M1
+    M1 -.-> N16
+    N1 --> M2
+    N0 --> |advises| M2
+    N2 -.-> M2
+    M2 -.-> N4
+    style N0 fill:#E8EAF6,stroke:#5C6BC0
+    style N1 fill:#E0F7FA,stroke:#00BCD4
+    style N2 fill:#D0E0F8,stroke:#4285F4
+    style N3 fill:#D0E0F8,stroke:#4285F4
+    style N4 fill:#D0E0F8,stroke:#4285F4
+    style N5 fill:#D0E0F8,stroke:#4285F4
+    style N6 fill:#E8EAF6,stroke:#5C6BC0
+    style N7 fill:#D0E0F8,stroke:#4285F4
+    style N8 fill:#E8EAF6,stroke:#5C6BC0
+    style N9 fill:#E8EAF6,stroke:#5C6BC0
+    style N10 fill:#D0E0F8,stroke:#4285F4
+    style N11 fill:#E0F7FA,stroke:#00BCD4
+    style N12 fill:#D0E0F8,stroke:#4285F4
+    style N13 fill:#E0F7FA,stroke:#00BCD4
+    style N14 fill:#D0E0F8,stroke:#4285F4
+    style N15 fill:#E0F7FA,stroke:#00BCD4
+    style N16 fill:#D0E0F8,stroke:#4285F4
+    style N17 fill:#E0F7FA,stroke:#00BCD4
+    style S0 fill:#E8EAF6,stroke:#5C6BC0
+    style S1 fill:#D0E0F8,stroke:#4285F4
+    style M0 fill:#D0E0F8,stroke:#4285F4
+    style M1 fill:#D0E0F8,stroke:#4285F4
+    style M2 fill:#E0F7FA,stroke:#00BCD4
+    style nest0_0 fill:#E8EAF6,stroke:#5C6BC0
+    style nest0_1 fill:#E8EAF6,stroke:#5C6BC0
+    style nest1_0 fill:#E8EAF6,stroke:#5C6BC0
+    style nest1_1 fill:#E8EAF6,stroke:#5C6BC0
+    style nest1_2 fill:#D0E0F8,stroke:#4285F4
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 44 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 45 stroke:#00BCD4,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_336.txt b/test/mermaid/hard/mermaid_336.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7cb05a506ba5956bc65cd8bf3a42eddddf9d232c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_336.txt
@@ -0,0 +1,45 @@
+<API Automation, connectedTo, Compliance in Automation>
+<API Automation, connectedTo, Email Automation>
+<API Automation, connectedTo, Hyperautomation>
+<Audit Trail for Automation, partOf, Natural Language Processing for Automation>
+<Audit Trail for Automation, tracks, Task Automation>
+<Automated Data Validation, connectedTo, Orchestration of Processes>
+<Automation Opportunity Identification, connectedTo, Email Automation>
+<Automation Opportunity Identification, connectedTo, Robotic Process Automation Implementation>
+<Business Process Management, connectedTo, Business Rule Engines>
+<Business Process Management, partOf, Workflow Automation Platforms>
+<Business Rule Engines, connectedTo, Automation Opportunity Identification>
+<Business Rule Engines, connectedTo, Decision Automation>
+<Change Management for Automation, connectedTo, Intelligent Automation>
+<Change Management for Automation, errors_detects, Business Rule Engines>
+<Chatbot Integration, connectedTo, Hyperautomation>
+<Compliance in Automation, connectedTo, Business Rule Engines>
+<Compliance in Automation, connectedTo, Chatbot Integration>
+<Compliance in Automation, connectedTo, Hyperautomation>
+<Customer Service Automation, connectedTo, Integration with Existing Systems>
+<Data Entry Automation, advises, Hyperautomation>
+<Data Entry Automation, connectedTo, API Automation>
+<Data Entry Automation, connectedTo, Automated Data Validation>
+<Data Entry Automation, connectedTo, Business Rule Engines>
+<Data Entry Automation, connectedTo, Hyperautomation>
+<Data Entry Automation, connectedTo, Performance Monitoring of Bots>
+<Data Entry Automation, connectedTo, User Training for Automated Systems>
+<Data Entry Automation, supports, Intelligent Automation>
+<Decision Automation, connectedTo, Business Process Management>
+<Decision Automation, partOf, Workflow Automation Platforms>
+<Email Automation, connectedTo, end>
+<Hyperautomation, connectedTo, Business Rule Engines>
+<Hyperautomation, connectedTo, Change Management for Automation>
+<Integration with Existing Systems, connectedTo, Automated Data Validation>
+<Intelligent Automation, connectedTo, Business Rule Engines>
+<Intelligent Automation, connectedTo, Return on Investment Calculation>
+<Intelligent Automation, connectedTo, User Training for Automated Systems>
+<Orchestration of Processes, connectedTo, Performance Monitoring of Bots>
+<Performance Monitoring of Bots, connectedTo, Email Automation>
+<Return on Investment Calculation, connectedTo, Audit Trail for Automation>
+<Return on Investment Calculation, partOf, Natural Language Processing for Automation>
+<Robotic Process Automation Implementation, connectedTo, Customer Service Automation>
+<Robotic Process Automation Implementation, connectedTo, Email Automation>
+<Task Automation, connectedTo, Intelligent Automation>
+<Task Automation, partOf, Natural Language Processing for Automation>
+<User Training for Automated Systems, connectedTo, Business Rule Engines>
diff --git a/test/mermaid/hard/mermaid_338.mmd b/test/mermaid/hard/mermaid_338.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..fa4d729cecd5f870795db4f558bf0f954a329eb1
--- /dev/null
+++ b/test/mermaid/hard/mermaid_338.mmd
@@ -0,0 +1,154 @@
+graph BT
+    N0([start])
+    N1[/Total Quality Management/]
+    N2([Quality Standards Development])
+    N3(Supplier Quality Management)
+    N4[[Inspection Procedures]]
+    N5[/Testing Methods/]
+    N6[/Quality Data Analysis/]
+    N7[Metrology]
+    N8[(Calibration of Instruments)]
+    N9[/Non_Destructive Testing/]
+    N10[Corrective and Preventive Actions]
+    N11[(Quality Management Systems)]
+    N12{ISO Certification}
+    N13[/X_ray Inspection/]
+    N14[(Automated Optical Inspection)]
+    N15{Quality Assurance}
+    N16(Lean Principles in Quality)
+    N17{Process Monitoring}
+    N18[Six Sigma Methodologies]
+    N19([Audit Planning])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Food Safety Quality Control
+        nest0_0([Defect Detection])
+        nest0_1([Product Testing])
+        nest0_2[(Quality Planning)]
+    end
+    subgraph Measurement System Analysis
+        nest1_0[[Non_Conformance Management]]
+        nest1_1[[Supplier Audits]]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> |develops| N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 -.-> |non_conformances_identifies| N15
+    N15 -.-> |risk_manages| N16
+    N16 --> N17
+    N17 -.-> N18
+    N18 --> |innovates| N19
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    N7 -.-> nest0_0
+    nest0_2 --> N8
+    nest1_0 -.-> nest1_1
+    N14 --> |processes_defines| nest1_0
+    nest1_1 --> |systems_controls| N9
+    N0 --> S0
+    S0 --> N12
+    S0 -.-> N6
+    S0 -.-> N13
+    N1 --> S1
+    S1 --> |consults| N12
+    S1 -.-> N16
+    S1 -.-> N11
+    N6 --> S2
+    S2 --> N18
+    S2 --> N13
+    N0 --> M0
+    N5 -.-> M0
+    N4 --> M0
+    M0 --> N9
+    N4 -.-> M1
+    N3 -.-> M1
+    M1 --> N9
+    style N0 fill:#C8EDFF,stroke:#82DAFF
+    style N1 fill:#EFEBE9,stroke:#A1887F
+    style N2 fill:#EFEBE9,stroke:#A1887F
+    style N3 fill:#EFEBE9,stroke:#A1887F
+    style N4 fill:#EFEBE9,stroke:#A1887F
+    style N5 fill:#EFEBE9,stroke:#A1887F
+    style N6 fill:#FFFAE0,stroke:#FFE470
+    style N7 fill:#FFFAE0,stroke:#FFE470
+    style N8 fill:#C8EDFF,stroke:#82DAFF
+    style N9 fill:#FFFAE0,stroke:#FFE470
+    style N10 fill:#C8EDFF,stroke:#82DAFF
+    style N11 fill:#FFFAE0,stroke:#FFE470
+    style N12 fill:#FFFAE0,stroke:#FFE470
+    style N13 fill:#FFFAE0,stroke:#FFE470
+    style N14 fill:#C8EDFF,stroke:#82DAFF
+    style N15 fill:#C8EDFF,stroke:#82DAFF
+    style N16 fill:#EFEBE9,stroke:#A1887F
+    style N17 fill:#EFEBE9,stroke:#A1887F
+    style N18 fill:#C8EDFF,stroke:#82DAFF
+    style N19 fill:#EFEBE9,stroke:#A1887F
+    style S0 fill:#C8EDFF,stroke:#82DAFF
+    style S1 fill:#C8EDFF,stroke:#82DAFF
+    style S2 fill:#C8EDFF,stroke:#82DAFF
+    style M0 fill:#EFEBE9,stroke:#A1887F
+    style M1 fill:#C8EDFF,stroke:#82DAFF
+    style nest0_0 fill:#EFEBE9,stroke:#A1887F
+    style nest0_1 fill:#FFFAE0,stroke:#FFE470
+    style nest0_2 fill:#EFEBE9,stroke:#A1887F
+    style nest1_0 fill:#C8EDFF,stroke:#82DAFF
+    style nest1_1 fill:#EFEBE9,stroke:#A1887F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#A1887F,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_338.txt b/test/mermaid/hard/mermaid_338.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0c464839965ed49c6407915a18230021538e1c61
--- /dev/null
+++ b/test/mermaid/hard/mermaid_338.txt
@@ -0,0 +1,43 @@
+<Automated Optical Inspection, non_conformances_identifies, Quality Assurance>
+<Automated Optical Inspection, processes_defines, Non_Conformance Management>
+<Calibration of Instruments, develops, Non_Destructive Testing>
+<Corrective and Preventive Actions, connectedTo, Quality Management Systems>
+<Defect Detection, connectedTo, Product Testing>
+<Defect Detection, partOf, Food Safety Quality Control>
+<ISO Certification, connectedTo, X_ray Inspection>
+<Inspection Procedures, connectedTo, Non_Destructive Testing>
+<Inspection Procedures, connectedTo, Testing Methods>
+<Lean Principles in Quality, connectedTo, Process Monitoring>
+<Metrology, connectedTo, Calibration of Instruments>
+<Metrology, connectedTo, Defect Detection>
+<Non_Conformance Management, connectedTo, Supplier Audits>
+<Non_Conformance Management, partOf, Measurement System Analysis>
+<Non_Destructive Testing, connectedTo, Corrective and Preventive Actions>
+<Process Monitoring, connectedTo, Six Sigma Methodologies>
+<Product Testing, connectedTo, Quality Planning>
+<Product Testing, partOf, Food Safety Quality Control>
+<Quality Assurance, risk_manages, Lean Principles in Quality>
+<Quality Data Analysis, connectedTo, Metrology>
+<Quality Data Analysis, connectedTo, Six Sigma Methodologies>
+<Quality Data Analysis, connectedTo, X_ray Inspection>
+<Quality Management Systems, connectedTo, ISO Certification>
+<Quality Planning, connectedTo, Calibration of Instruments>
+<Quality Planning, partOf, Food Safety Quality Control>
+<Quality Standards Development, connectedTo, Supplier Quality Management>
+<Six Sigma Methodologies, innovates, Audit Planning>
+<Supplier Audits, partOf, Measurement System Analysis>
+<Supplier Audits, systems_controls, Non_Destructive Testing>
+<Supplier Quality Management, connectedTo, Inspection Procedures>
+<Supplier Quality Management, connectedTo, Non_Destructive Testing>
+<Testing Methods, connectedTo, Non_Destructive Testing>
+<Testing Methods, connectedTo, Quality Data Analysis>
+<Total Quality Management, connectedTo, Lean Principles in Quality>
+<Total Quality Management, connectedTo, Quality Management Systems>
+<Total Quality Management, connectedTo, Quality Standards Development>
+<Total Quality Management, consults, ISO Certification>
+<X_ray Inspection, connectedTo, Automated Optical Inspection>
+<start, connectedTo, ISO Certification>
+<start, connectedTo, Non_Destructive Testing>
+<start, connectedTo, Quality Data Analysis>
+<start, connectedTo, Total Quality Management>
+<start, connectedTo, X_ray Inspection>
diff --git a/test/mermaid/hard/mermaid_339.mmd b/test/mermaid/hard/mermaid_339.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..9996f4a2e27673d37720a43d202dffc0e0347808
--- /dev/null
+++ b/test/mermaid/hard/mermaid_339.mmd
@@ -0,0 +1,122 @@
+graph LR
+    N0([Root Cause Analysis])
+    N1[(Non_Conformance Management)]
+    N2[Automated Optical Inspection]
+    N3(Quality Standards Development)
+    N4[Food Safety Quality Control]
+    N5[/Process Monitoring/]
+    N6[X_ray Inspection]
+    N7[Calibration of Instruments]
+    N8([Total Quality Management])
+    N9(Testing Methods)
+    N10(Metrology)
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Defect Detection
+        nest0_0[Supplier Audits]
+        nest0_1([Continuous Improvement])
+    end
+    subgraph Product Testing
+        nest1_0([Customer Feedback Analysis])
+        nest1_1([Lean Principles in Quality])
+        nest1_2[Measurement System Analysis]
+        nest1_3([Statistical Process Control])
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    nest0_0 -.-> nest0_1
+    N5 --> nest0_0
+    nest0_1 -.-> N2
+    nest1_0 --> |advises| nest1_1
+    nest1_1 --> |improves| nest1_2
+    nest1_2 -.-> nest1_3
+    N8 -.-> |processes_optimizes| nest1_0
+    nest1_3 --> N9
+    N4 -.-> S0
+    S0 -.-> N7
+    S0 --> N8
+    N4 --> S1
+    S1 --> N10
+    S1 --> N6
+    S1 -.-> N9
+    N3 --> S2
+    S2 --> N7
+    S2 -.-> N9
+    N6 -.-> M1
+    N0 --> M1
+    N5 --> M1
+    M1 --> N9
+    N0 --> M2
+    N1 -.-> M2
+    N2 -.-> M2
+    M2 --> N4
+    style N0 fill:#F1F8FF,stroke:#42A5F5
+    style N1 fill:#F1F8FF,stroke:#42A5F5
+    style N2 fill:#ECCFF5,stroke:#CD8FF2
+    style N3 fill:#FFFDE0,stroke:#FFF8A6
+    style N4 fill:#FFFDE0,stroke:#FFF8A6
+    style N5 fill:#FFFDE0,stroke:#FFF8A6
+    style N6 fill:#FFFDE0,stroke:#FFF8A6
+    style N7 fill:#FFFDE0,stroke:#FFF8A6
+    style N8 fill:#FFFDE0,stroke:#FFF8A6
+    style N9 fill:#FFFDE0,stroke:#FFF8A6
+    style N10 fill:#F1F8FF,stroke:#42A5F5
+    style S0 fill:#FFFDE0,stroke:#FFF8A6
+    style S1 fill:#F1F8FF,stroke:#42A5F5
+    style S2 fill:#ECCFF5,stroke:#CD8FF2
+    style M1 fill:#ECCFF5,stroke:#CD8FF2
+    style M2 fill:#ECCFF5,stroke:#CD8FF2
+    style nest0_0 fill:#F1F8FF,stroke:#42A5F5
+    style nest0_1 fill:#F1F8FF,stroke:#42A5F5
+    style nest1_0 fill:#F1F8FF,stroke:#42A5F5
+    style nest1_1 fill:#ECCFF5,stroke:#CD8FF2
+    style nest1_2 fill:#ECCFF5,stroke:#CD8FF2
+    style nest1_3 fill:#FFFDE0,stroke:#FFF8A6
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_339.txt b/test/mermaid/hard/mermaid_339.txt
new file mode 100644
index 0000000000000000000000000000000000000000..c45698a8148d7e6e946022e9093e6cf938ce8bbc
--- /dev/null
+++ b/test/mermaid/hard/mermaid_339.txt
@@ -0,0 +1,37 @@
+<Automated Optical Inspection, connectedTo, Food Safety Quality Control>
+<Automated Optical Inspection, connectedTo, Quality Standards Development>
+<Calibration of Instruments, connectedTo, Total Quality Management>
+<Continuous Improvement, connectedTo, Automated Optical Inspection>
+<Continuous Improvement, partOf, Defect Detection>
+<Customer Feedback Analysis, advises, Lean Principles in Quality>
+<Customer Feedback Analysis, partOf, Product Testing>
+<Food Safety Quality Control, connectedTo, Calibration of Instruments>
+<Food Safety Quality Control, connectedTo, Metrology>
+<Food Safety Quality Control, connectedTo, Process Monitoring>
+<Food Safety Quality Control, connectedTo, Testing Methods>
+<Food Safety Quality Control, connectedTo, Total Quality Management>
+<Food Safety Quality Control, connectedTo, X_ray Inspection>
+<Lean Principles in Quality, improves, Measurement System Analysis>
+<Lean Principles in Quality, partOf, Product Testing>
+<Measurement System Analysis, connectedTo, Statistical Process Control>
+<Measurement System Analysis, partOf, Product Testing>
+<Non_Conformance Management, connectedTo, Automated Optical Inspection>
+<Non_Conformance Management, connectedTo, Food Safety Quality Control>
+<Process Monitoring, connectedTo, Supplier Audits>
+<Process Monitoring, connectedTo, Testing Methods>
+<Process Monitoring, connectedTo, X_ray Inspection>
+<Quality Standards Development, connectedTo, Calibration of Instruments>
+<Quality Standards Development, connectedTo, Food Safety Quality Control>
+<Quality Standards Development, connectedTo, Testing Methods>
+<Root Cause Analysis, connectedTo, Food Safety Quality Control>
+<Root Cause Analysis, connectedTo, Non_Conformance Management>
+<Root Cause Analysis, connectedTo, Testing Methods>
+<Statistical Process Control, connectedTo, Testing Methods>
+<Statistical Process Control, partOf, Product Testing>
+<Supplier Audits, connectedTo, Continuous Improvement>
+<Supplier Audits, partOf, Defect Detection>
+<Testing Methods, connectedTo, Metrology>
+<Total Quality Management, connectedTo, Testing Methods>
+<Total Quality Management, processes_optimizes, Customer Feedback Analysis>
+<X_ray Inspection, connectedTo, Calibration of Instruments>
+<X_ray Inspection, connectedTo, Testing Methods>
diff --git a/test/mermaid/hard/mermaid_34.mmd b/test/mermaid/hard/mermaid_34.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..c9e759e8dfb47c6bc5b3c69487ba56ac3740a8b4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_34.mmd
@@ -0,0 +1,123 @@
+graph RL
+    N0([start])
+    N1[Passport Renewal Assistance]
+    N2(Itinerary Planning)
+    N3(Cultural Immersion Program)
+    N4[Flight Booking]
+    N5[(Adventure Sports Booking)]
+    N6(Emergency Assistance)
+    N7([Rental Car Pickup])
+    N8[Historical Site Exploration]
+    N9[Restaurant Reservation]
+    N10(Visa Application)
+    N11(Local Transport)
+    N12[(Lost and Found Service)]
+    N13[Sightseeing Scheduling]
+    N14([Spa Appointment])
+    N15(Trip Sharing)
+    N16(Feedback Collection)
+    N17([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Concert Ticketing
+        nest0_0{Museum Visit}
+        nest0_1{Travel Insurance}
+        nest0_2[[Booking Modification]]
+    end
+    subgraph Tourist Information Desk
+        nest1_0[Tour Guide Assignment]
+        nest1_1(Cruise Ship Boarding)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> |no| N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    N15 -.-> N16
+    N16 --> |yes| N17
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N8 -.-> |no| nest0_0
+    nest0_2 --> N13
+    nest1_0 -.-> |no| nest1_1
+    N15 -.-> nest1_0
+    nest1_1 --> N15
+    N0 --> S0
+    S0 -.-> N17
+    S0 -.-> N4
+    S0 -.-> |yes| N15
+    N4 --> S1
+    S1 --> N10
+    S1 --> |yes| N6
+    N0 --> S2
+    S2 -.-> N15
+    S2 --> N4
+    S2 --> N5
+    N8 -.-> M0
+    N3 -.-> M0
+    N4 --> M0
+    M0 --> N12
+    N7 -.-> M1
+    N0 -.-> |yes| M1
+    M1 --> N10
+    style S0 fill:#FFFDE7,stroke:#FBC02D
+    style S1 fill:#FFF9D4,stroke:#FFE69C
+    style S2 fill:#FFF9D4,stroke:#FFE69C
+    style M0 fill:#E4E0DF,stroke:#BDAFA8
+    style M1 fill:#FFF9D4,stroke:#FFE69C
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#FBC02D,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_340.mmd b/test/mermaid/hard/mermaid_340.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..44cdc1b2743b1be108c1860d424ee31fc64b930a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_340.mmd
@@ -0,0 +1,138 @@
+graph BT
+    N0([ERP Consulting])
+    N1[/Mobile ERP Access/]
+    N2{Business Process Re_engineering}
+    N3[On_Premise ERP Solutions]
+    N4{Implementation Roadmap Development}
+    N5(Integration with Other Systems)
+    N6[/Master Data Management/]
+    N7([User Access Management])
+    N8[Data Migration]
+    N9(Security Management)
+    N10[[Customer Relationship Management]]
+    N11([System Upgrade])
+    N12[[Project Management]]
+    N13[Financial Management]
+    N14(System Configuration)
+    N15([Human Capital Management])
+    N16([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M2(( ))
+    subgraph Compliance Reporting
+        nest0_0[Manufacturing Operations]
+        nest0_1[(Cloud ERP Deployment)]
+    end
+    subgraph Post_Go_Live Support
+        nest1_0([Procurement Management])
+        nest1_1(Hybrid ERP Models)
+        nest1_2[User Training]
+        nest1_3{Module Implementation}
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 --> N14
+    N14 --> N15
+    N15 -.-> N16
+    nest0_0 --> nest0_1
+    N12 -.-> nest0_0
+    nest0_1 --> N13
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 -.-> nest1_3
+    N10 -.-> nest1_0
+    nest1_3 -.-> N8
+    N11 --> S0
+    S0 --> N14
+    S0 --> N15
+    N5 --> S1
+    S1 -.-> N15
+    S1 --> N10
+    S1 --> N16
+    S1 --> N8
+    N3 --> S2
+    S2 -.-> N7
+    S2 -.-> N9
+    N0 -.-> M2
+    N4 --> M2
+    N1 -.-> M2
+    M2 --> N7
+    style N0 fill:#D0E0F8,stroke:#4285F4
+    style N1 fill:#DACBE3,stroke:#A188D0
+    style N2 fill:#FFEBEB,stroke:#FFC2C2
+    style N3 fill:#D0E0F8,stroke:#4285F4
+    style N4 fill:#DACBE3,stroke:#A188D0
+    style N5 fill:#DACBE3,stroke:#A188D0
+    style N6 fill:#D0E0F8,stroke:#4285F4
+    style N7 fill:#D0E0F8,stroke:#4285F4
+    style N8 fill:#D0E0F8,stroke:#4285F4
+    style N9 fill:#DACBE3,stroke:#A188D0
+    style N10 fill:#D0E0F8,stroke:#4285F4
+    style N11 fill:#D0E0F8,stroke:#4285F4
+    style N12 fill:#D0E0F8,stroke:#4285F4
+    style N13 fill:#D0E0F8,stroke:#4285F4
+    style N14 fill:#D0E0F8,stroke:#4285F4
+    style N15 fill:#FFEBEB,stroke:#FFC2C2
+    style N16 fill:#FFEBEB,stroke:#FFC2C2
+    style S0 fill:#DACBE3,stroke:#A188D0
+    style S1 fill:#D0E0F8,stroke:#4285F4
+    style S2 fill:#DACBE3,stroke:#A188D0
+    style M2 fill:#D0E0F8,stroke:#4285F4
+    style nest0_0 fill:#FFEBEB,stroke:#FFC2C2
+    style nest0_1 fill:#FFEBEB,stroke:#FFC2C2
+    style nest1_0 fill:#D0E0F8,stroke:#4285F4
+    style nest1_1 fill:#DACBE3,stroke:#A188D0
+    style nest1_2 fill:#DACBE3,stroke:#A188D0
+    style nest1_3 fill:#DACBE3,stroke:#A188D0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#A188D0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_340.txt b/test/mermaid/hard/mermaid_340.txt
new file mode 100644
index 0000000000000000000000000000000000000000..80dd5e97ee876c83617bfee35256f49b34213e63
--- /dev/null
+++ b/test/mermaid/hard/mermaid_340.txt
@@ -0,0 +1,41 @@
+<Business Process Re_engineering, connectedTo, On_Premise ERP Solutions>
+<Cloud ERP Deployment, connectedTo, Financial Management>
+<Cloud ERP Deployment, partOf, Compliance Reporting>
+<Customer Relationship Management, connectedTo, Procurement Management>
+<Customer Relationship Management, connectedTo, System Upgrade>
+<Data Migration, connectedTo, Security Management>
+<ERP Consulting, connectedTo, Mobile ERP Access>
+<ERP Consulting, connectedTo, User Access Management>
+<Financial Management, connectedTo, System Configuration>
+<Human Capital Management, connectedTo, end>
+<Hybrid ERP Models, connectedTo, User Training>
+<Hybrid ERP Models, partOf, Post_Go_Live Support>
+<Implementation Roadmap Development, connectedTo, Integration with Other Systems>
+<Implementation Roadmap Development, connectedTo, User Access Management>
+<Integration with Other Systems, connectedTo, Customer Relationship Management>
+<Integration with Other Systems, connectedTo, Data Migration>
+<Integration with Other Systems, connectedTo, Human Capital Management>
+<Integration with Other Systems, connectedTo, Master Data Management>
+<Integration with Other Systems, connectedTo, end>
+<Manufacturing Operations, connectedTo, Cloud ERP Deployment>
+<Manufacturing Operations, partOf, Compliance Reporting>
+<Master Data Management, connectedTo, User Access Management>
+<Mobile ERP Access, connectedTo, Business Process Re_engineering>
+<Mobile ERP Access, connectedTo, User Access Management>
+<Module Implementation, connectedTo, Data Migration>
+<Module Implementation, partOf, Post_Go_Live Support>
+<On_Premise ERP Solutions, connectedTo, Implementation Roadmap Development>
+<On_Premise ERP Solutions, connectedTo, Security Management>
+<On_Premise ERP Solutions, connectedTo, User Access Management>
+<Procurement Management, connectedTo, Hybrid ERP Models>
+<Procurement Management, partOf, Post_Go_Live Support>
+<Project Management, connectedTo, Financial Management>
+<Project Management, connectedTo, Manufacturing Operations>
+<Security Management, connectedTo, Customer Relationship Management>
+<System Configuration, connectedTo, Human Capital Management>
+<System Upgrade, connectedTo, Human Capital Management>
+<System Upgrade, connectedTo, Project Management>
+<System Upgrade, connectedTo, System Configuration>
+<User Access Management, connectedTo, Data Migration>
+<User Training, connectedTo, Module Implementation>
+<User Training, partOf, Post_Go_Live Support>
diff --git a/test/mermaid/hard/mermaid_341.txt b/test/mermaid/hard/mermaid_341.txt
new file mode 100644
index 0000000000000000000000000000000000000000..395ba76935be1bc990e2633c5c319dc7b73e7a11
--- /dev/null
+++ b/test/mermaid/hard/mermaid_341.txt
@@ -0,0 +1,41 @@
+<Compliance Reporting, connectedTo, Procurement Management>
+<Customer Relationship Management, connectedTo, Compliance Reporting>
+<Customer Relationship Management, connectedTo, Integration with Other Systems>
+<Customer Relationship Management, connectedTo, Security Management>
+<Customer Relationship Management, connectedTo, Troubleshooting and Support>
+<Customization, connectedTo, Testing ERP Modules>
+<Customization, yes, Compliance Reporting>
+<ERP Consulting, connectedTo, Inventory Management>
+<ERP Consulting, partOf, Business Process Re_engineering>
+<ERP System Selection, yes, Security Management>
+<Human Capital Management, no, ERP Consulting>
+<Human Capital Management, partOf, Business Process Re_engineering>
+<Integration with Other Systems, connectedTo, Inventory Management>
+<Inventory Management, connectedTo, Master Data Management>
+<Manufacturing Operations, partOf, Data Governance>
+<Manufacturing Operations, yes, User Training>
+<Procurement Management, connectedTo, ERP System Selection>
+<Procurement Management, connectedTo, Inventory Management>
+<Procurement Management, connectedTo, Master Data Management>
+<Project Management, connectedTo, Human Capital Management>
+<Project Management, partOf, Business Process Re_engineering>
+<Security Management, connectedTo, Integration with Other Systems>
+<Testing ERP Modules, connectedTo, Project Management>
+<Testing ERP Modules, partOf, Business Process Re_engineering>
+<Troubleshooting and Support, connectedTo, Compliance Reporting>
+<Troubleshooting and Support, connectedTo, Customization>
+<Troubleshooting and Support, connectedTo, Integration with Other Systems>
+<Troubleshooting and Support, connectedTo, Security Management>
+<Troubleshooting and Support, connectedTo, User Acceptance Testing>
+<Troubleshooting and Support, connectedTo, Workflow Automation in ERP>
+<User Acceptance Testing, connectedTo, Customization>
+<User Acceptance Testing, connectedTo, Integration with Other Systems>
+<User Access Management, connectedTo, Vendor Management>
+<User Training, connectedTo, Customer Relationship Management>
+<User Training, partOf, Data Governance>
+<Vendor Management, connectedTo, Customer Relationship Management>
+<Vendor Management, connectedTo, Customization>
+<Workflow Automation in ERP, connectedTo, Manufacturing Operations>
+<Workflow Automation in ERP, partOf, Data Governance>
+<start, connectedTo, Customization>
+<start, yes, User Access Management>
diff --git a/test/mermaid/hard/mermaid_342.mmd b/test/mermaid/hard/mermaid_342.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..69cddd8d4f78bafa835287c7364a32be144632db
--- /dev/null
+++ b/test/mermaid/hard/mermaid_342.mmd
@@ -0,0 +1,127 @@
+graph BT
+    N0([start])
+    N1(Manufacturing Operations)
+    N2[(Inventory Management)]
+    N3[(Cloud ERP Deployment)]
+    N4[Workflow Automation in ERP]
+    N5[Reporting and Analytics]
+    N6(User Training)
+    N7[Hybrid ERP Models]
+    N8[(Customization)]
+    N9([Security Management])
+    N10[/Data Governance/]
+    N11[/Post_Go_Live Support/]
+    N12[User Access Management]
+    N13([Supply Chain Management])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Implementation Roadmap Development
+        nest0_0{Financial Management}
+        nest0_1[(Asset Management)]
+        nest0_2[On_Premise ERP Solutions]
+    end
+    subgraph Procurement Management
+        nest1_0{System Configuration}
+        nest1_1{Module Implementation}
+        nest1_2[Master Data Management]
+        nest1_3([AI or ML in ERP])
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> N13
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N2 --> nest0_0
+    nest0_2 -.-> N6
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> |yes| nest1_3
+    N4 --> nest1_0
+    nest1_3 --> N8
+    N5 -.-> S0
+    S0 -.-> N7
+    S0 --> N11
+    N9 -.-> S1
+    S1 -.-> N12
+    S1 --> N11
+    S1 --> N13
+    N0 -.-> S2
+    S2 -.-> N10
+    S2 -.-> N3
+    S2 --> N7
+    S2 --> N5
+    N1 -.-> M0
+    N2 --> M0
+    M0 -.-> N4
+    N0 --> M1
+    N6 -.-> M1
+    N2 -.-> M1
+    M1 --> N9
+    N0 --> M2
+    N4 --> M2
+    M2 --> N11
+    style S0 fill:#FCFCE7,stroke:#DCE775
+    style S1 fill:#C9EFEC,stroke:#6FE1D5
+    style S2 fill:#C9EFEC,stroke:#6FE1D5
+    style M0 fill:#FCFCE7,stroke:#DCE775
+    style M1 fill:#FCFCE7,stroke:#DCE775
+    style M2 fill:#C9EFEC,stroke:#6FE1D5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#6FE1D5,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_342.txt b/test/mermaid/hard/mermaid_342.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e0d1be4527eddc9ae7592b43278f38eb56480bc5
--- /dev/null
+++ b/test/mermaid/hard/mermaid_342.txt
@@ -0,0 +1,45 @@
+<AI or ML in ERP, connectedTo, Customization>
+<AI or ML in ERP, partOf, Procurement Management>
+<Asset Management, connectedTo, On_Premise ERP Solutions>
+<Asset Management, partOf, Implementation Roadmap Development>
+<Cloud ERP Deployment, connectedTo, Workflow Automation in ERP>
+<Customization, connectedTo, Security Management>
+<Data Governance, connectedTo, Post_Go_Live Support>
+<Financial Management, connectedTo, Asset Management>
+<Financial Management, partOf, Implementation Roadmap Development>
+<Hybrid ERP Models, connectedTo, Customization>
+<Inventory Management, connectedTo, Cloud ERP Deployment>
+<Inventory Management, connectedTo, Financial Management>
+<Inventory Management, connectedTo, Security Management>
+<Inventory Management, connectedTo, Workflow Automation in ERP>
+<Manufacturing Operations, connectedTo, Inventory Management>
+<Manufacturing Operations, connectedTo, Workflow Automation in ERP>
+<Master Data Management, partOf, Procurement Management>
+<Master Data Management, yes, AI or ML in ERP>
+<Module Implementation, connectedTo, Master Data Management>
+<Module Implementation, partOf, Procurement Management>
+<On_Premise ERP Solutions, connectedTo, User Training>
+<On_Premise ERP Solutions, partOf, Implementation Roadmap Development>
+<Post_Go_Live Support, connectedTo, User Access Management>
+<Reporting and Analytics, connectedTo, Hybrid ERP Models>
+<Reporting and Analytics, connectedTo, Post_Go_Live Support>
+<Reporting and Analytics, connectedTo, User Training>
+<Security Management, connectedTo, Data Governance>
+<Security Management, connectedTo, Post_Go_Live Support>
+<Security Management, connectedTo, Supply Chain Management>
+<Security Management, connectedTo, User Access Management>
+<System Configuration, connectedTo, Module Implementation>
+<System Configuration, partOf, Procurement Management>
+<User Access Management, connectedTo, Supply Chain Management>
+<User Training, connectedTo, Hybrid ERP Models>
+<User Training, connectedTo, Security Management>
+<Workflow Automation in ERP, connectedTo, Post_Go_Live Support>
+<Workflow Automation in ERP, connectedTo, Reporting and Analytics>
+<Workflow Automation in ERP, connectedTo, System Configuration>
+<start, connectedTo, Cloud ERP Deployment>
+<start, connectedTo, Data Governance>
+<start, connectedTo, Hybrid ERP Models>
+<start, connectedTo, Manufacturing Operations>
+<start, connectedTo, Post_Go_Live Support>
+<start, connectedTo, Reporting and Analytics>
+<start, connectedTo, Security Management>
diff --git a/test/mermaid/hard/mermaid_343.mmd b/test/mermaid/hard/mermaid_343.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..ae024b28d237dca5c895ceff9a1283d3097aa5ab
--- /dev/null
+++ b/test/mermaid/hard/mermaid_343.mmd
@@ -0,0 +1,126 @@
+graph RL
+    N0([Farm Data Integration])
+    N1{Smart Livestock Monitoring}
+    N2[[Variable Rate Application]]
+    N3(Farm Management Software)
+    N4[/AI for Crop Disease Detection/]
+    N5{Livestock Feeding Automation}
+    N6([Automated Farm Machinery])
+    N7([Satellite Imaging])
+    N8[/Connectivity Solutions/]
+    N9[Farm Management Dashboards]
+    N10(Automated Irrigation)
+    N11([Digital Agronomy])
+    N12[Forestry Management with Digital Tools]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M2(( ))
+    subgraph Pest and Disease Management Systems
+        nest0_0[Precision Farming]
+        nest0_1{Smart Greenhouses}
+        nest0_2[[Herd Health Monitoring]]
+    end
+    subgraph Sustainability Metrics Tracking
+        nest1_0[[IoT in Agriculture]]
+        nest1_1(Farm Robotics)
+        nest1_2[Big Data Analytics for Farms]
+        nest1_3[[Predictive Analytics for Harvest]]
+    end
+    N0 -.-> N1
+    N1 --> |machine_learning_uses| N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> |complies| N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 --> N11
+    N11 --> N12
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N7 -.-> nest0_0
+    nest0_2 -.-> |IoT_integrates| N7
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> |analyzes_data| nest1_3
+    N11 -.-> nest1_0
+    nest1_3 --> |blockchain_traces| N9
+    N4 -.-> S0
+    S0 -.-> N6
+    S0 -.-> N8
+    S0 -.-> N11
+    N6 -.-> S1
+    S1 --> N8
+    S1 --> N12
+    S1 --> N9
+    S1 -.-> N11
+    N1 -.-> S2
+    S2 -.-> N8
+    S2 -.-> N7
+    N1 --> |sprays| M2
+    N0 --> M2
+    M2 --> N5
+    style N0 fill:#F3E5F5,stroke:#AB47BC
+    style N1 fill:#F3E5F5,stroke:#AB47BC
+    style N2 fill:#DACBE3,stroke:#A188D0
+    style N3 fill:#F3E5F5,stroke:#AB47BC
+    style N4 fill:#B3E5FC,stroke:#03A9F4
+    style N5 fill:#F3E5F5,stroke:#AB47BC
+    style N6 fill:#B3E5FC,stroke:#03A9F4
+    style N7 fill:#B3E5FC,stroke:#03A9F4
+    style N8 fill:#F3E5F5,stroke:#AB47BC
+    style N9 fill:#B3E5FC,stroke:#03A9F4
+    style N10 fill:#DACBE3,stroke:#A188D0
+    style N11 fill:#DACBE3,stroke:#A188D0
+    style N12 fill:#F3E5F5,stroke:#AB47BC
+    style S0 fill:#B3E5FC,stroke:#03A9F4
+    style S1 fill:#F3E5F5,stroke:#AB47BC
+    style S2 fill:#DACBE3,stroke:#A188D0
+    style M2 fill:#F3E5F5,stroke:#AB47BC
+    style nest0_0 fill:#DACBE3,stroke:#A188D0
+    style nest0_1 fill:#B3E5FC,stroke:#03A9F4
+    style nest0_2 fill:#B3E5FC,stroke:#03A9F4
+    style nest1_0 fill:#B3E5FC,stroke:#03A9F4
+    style nest1_1 fill:#F3E5F5,stroke:#AB47BC
+    style nest1_2 fill:#B3E5FC,stroke:#03A9F4
+    style nest1_3 fill:#DACBE3,stroke:#A188D0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#A188D0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_344.mmd b/test/mermaid/hard/mermaid_344.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..661385af7942208dea6936aa5f63d1d5842b2ef5
--- /dev/null
+++ b/test/mermaid/hard/mermaid_344.mmd
@@ -0,0 +1,108 @@
+graph TD
+    N0([start])
+    N1(Farm Management Dashboards)
+    N2[(Farm Labor Management Software)]
+    N3[Market Price Forecasting]
+    N4(IoT in Agriculture)
+    N5(Livestock Feeding Automation)
+    N6[Drone Monitoring]
+    N7(Smart Livestock Monitoring)
+    N8[Farm Data Integration]
+    N9([AI for Crop Disease Detection])
+    N10[/Sustainability Metrics Tracking/]
+    N11(Automated Irrigation)
+    N12[Farm Robotics]
+    N13([Smart Greenhouses])
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Digital Agronomy
+        nest0_0(Supply Chain Traceability)
+        nest0_1[[Weather Station Data Integration]]
+        nest0_2[(Forestry Management with Digital Tools)]
+        nest0_3([Satellite Imaging])
+    end
+    subgraph Predictive Analytics for Harvest
+        nest1_0{Resource Optimization}
+        nest1_1[Aquaculture Monitoring]
+        nest1_2([Blockchain for Agri_Supply Chain])
+        nest1_3[Farm Management Software]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 --> |no| N12
+    N12 -.-> N13
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N11 --> |yes| nest0_0
+    nest0_3 --> N10
+    nest1_0 --> |no| nest1_1
+    nest1_1 -.-> |no| nest1_2
+    nest1_2 -.-> nest1_3
+    N6 -.-> nest1_0
+    nest1_3 --> N7
+    N8 -.-> S1
+    S1 -.-> N13
+    S1 -.-> N10
+    S1 --> N11
+    N0 -.-> M0
+    N4 -.-> M0
+    N5 --> M0
+    N1 --> M0
+    M0 -.-> N7
+    N3 -.-> M1
+    N2 --> M1
+    N1 --> M1
+    N0 -.-> M1
+    M1 --> N6
+    style S1 fill:#FFDAB9,stroke:#FFC085
+    style M0 fill:#FBE9E7,stroke:#FF8A65
+    style M1 fill:#FFDAB9,stroke:#FFC085
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#B8C0F5,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FF8A65,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_345.mmd b/test/mermaid/hard/mermaid_345.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..05d8b82d8a66dc6abc2f3a51867ee8edae698d2e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_345.mmd
@@ -0,0 +1,116 @@
+graph LR
+    N0([Market Price Forecasting])
+    N1[[Big Data Analytics for Farms]]
+    N2[/Livestock Feeding Automation/]
+    N3(Crop Insurance Assessment)
+    N4([Precision Farming])
+    N5[[Smart Greenhouses]]
+    N6(Weather Station Data Integration)
+    N7[/Data Security in Agriculture/]
+    N8([Carbon Farming Initiatives])
+    N9[(Farm Management Dashboards)]
+    N10(Predictive Analytics for Harvest)
+    N11[(Digital Soil Mapping)]
+    N12{Sensor Deployment}
+    N13([Sustainability Metrics Tracking])
+    S0(( ))
+    S1(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Smart Livestock Monitoring
+        nest0_0[IoT in Agriculture]
+        nest0_1[[AI for Crop Disease Detection]]
+    end
+    subgraph Pest and Disease Management Systems
+        nest1_0(Yield Mapping)
+        nest1_1([Forestry Management with Digital Tools])
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> |optimizes| N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> |controls| N12
+    N12 --> N13
+    nest0_0 -.-> nest0_1
+    N4 -.-> nest0_0
+    nest0_1 -.-> N3
+    nest1_0 --> nest1_1
+    N8 -.-> nest1_0
+    nest1_1 -.-> N13
+    N3 -.-> S0
+    S0 -.-> N11
+    S0 -.-> N10
+    N8 -.-> S1
+    S1 --> N13
+    S1 -.-> N12
+    S1 --> N10
+    N0 -.-> M1
+    N1 -.-> M1
+    M1 -.-> N3
+    N3 -.-> M2
+    N1 --> M2
+    N2 --> M2
+    M2 -.-> N5
+    style N0 fill:#F1F8E9,stroke:#388E3C
+    style N1 fill:#F1F8E9,stroke:#388E3C
+    style N2 fill:#FFFDE7,stroke:#FFF176
+    style N3 fill:#F0F4C3,stroke:#AED581
+    style N4 fill:#F1F8E9,stroke:#388E3C
+    style N5 fill:#FFFDE7,stroke:#FFF176
+    style N6 fill:#F0F4C3,stroke:#AED581
+    style N7 fill:#FFFDE7,stroke:#FFF176
+    style N8 fill:#FFFDE7,stroke:#FFF176
+    style N9 fill:#F0F4C3,stroke:#AED581
+    style N10 fill:#FFFDE7,stroke:#FFF176
+    style N11 fill:#FFFDE7,stroke:#FFF176
+    style N12 fill:#F1F8E9,stroke:#388E3C
+    style N13 fill:#F1F8E9,stroke:#388E3C
+    style S0 fill:#FFFDE7,stroke:#FFF176
+    style S1 fill:#F0F4C3,stroke:#AED581
+    style M1 fill:#F1F8E9,stroke:#388E3C
+    style M2 fill:#F1F8E9,stroke:#388E3C
+    style nest0_0 fill:#F1F8E9,stroke:#388E3C
+    style nest0_1 fill:#F1F8E9,stroke:#388E3C
+    style nest1_0 fill:#F1F8E9,stroke:#388E3C
+    style nest1_1 fill:#F1F8E9,stroke:#388E3C
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFF176,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_345.txt b/test/mermaid/hard/mermaid_345.txt
new file mode 100644
index 0000000000000000000000000000000000000000..2b13096bdc53741fa825a99136ed461381e13716
--- /dev/null
+++ b/test/mermaid/hard/mermaid_345.txt
@@ -0,0 +1,33 @@
+<AI for Crop Disease Detection, connectedTo, Crop Insurance Assessment>
+<AI for Crop Disease Detection, partOf, Smart Livestock Monitoring>
+<Big Data Analytics for Farms, connectedTo, Crop Insurance Assessment>
+<Big Data Analytics for Farms, connectedTo, Livestock Feeding Automation>
+<Big Data Analytics for Farms, connectedTo, Smart Greenhouses>
+<Carbon Farming Initiatives, connectedTo, Farm Management Dashboards>
+<Carbon Farming Initiatives, connectedTo, Predictive Analytics for Harvest>
+<Carbon Farming Initiatives, connectedTo, Sensor Deployment>
+<Carbon Farming Initiatives, connectedTo, Sustainability Metrics Tracking>
+<Carbon Farming Initiatives, connectedTo, Yield Mapping>
+<Crop Insurance Assessment, connectedTo, Digital Soil Mapping>
+<Crop Insurance Assessment, connectedTo, Precision Farming>
+<Crop Insurance Assessment, connectedTo, Predictive Analytics for Harvest>
+<Crop Insurance Assessment, connectedTo, Smart Greenhouses>
+<Data Security in Agriculture, optimizes, Carbon Farming Initiatives>
+<Digital Soil Mapping, controls, Sensor Deployment>
+<Farm Management Dashboards, connectedTo, Predictive Analytics for Harvest>
+<Forestry Management with Digital Tools, connectedTo, Sustainability Metrics Tracking>
+<Forestry Management with Digital Tools, partOf, Pest and Disease Management Systems>
+<IoT in Agriculture, connectedTo, AI for Crop Disease Detection>
+<IoT in Agriculture, partOf, Smart Livestock Monitoring>
+<Livestock Feeding Automation, connectedTo, Crop Insurance Assessment>
+<Livestock Feeding Automation, connectedTo, Smart Greenhouses>
+<Market Price Forecasting, connectedTo, Big Data Analytics for Farms>
+<Market Price Forecasting, connectedTo, Crop Insurance Assessment>
+<Precision Farming, connectedTo, IoT in Agriculture>
+<Precision Farming, connectedTo, Smart Greenhouses>
+<Predictive Analytics for Harvest, connectedTo, Digital Soil Mapping>
+<Sensor Deployment, connectedTo, Sustainability Metrics Tracking>
+<Smart Greenhouses, connectedTo, Weather Station Data Integration>
+<Weather Station Data Integration, connectedTo, Data Security in Agriculture>
+<Yield Mapping, connectedTo, Forestry Management with Digital Tools>
+<Yield Mapping, partOf, Pest and Disease Management Systems>
diff --git a/test/mermaid/hard/mermaid_346.mmd b/test/mermaid/hard/mermaid_346.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..109c2ab56ad5ab3dca3405fe67ab4aaddf428f94
--- /dev/null
+++ b/test/mermaid/hard/mermaid_346.mmd
@@ -0,0 +1,158 @@
+graph TD
+    N0([Social Media Management])
+    N1[Network Infrastructure for Tournaments]
+    N2{Data Security for Competitions}
+    N3(Player Wellness Programs)
+    N4[Performance Analysis]
+    N5(Brand Partnerships)
+    N6[Audience Engagement]
+    N7[[Sponsorship Acquisition]]
+    N8[Game Strategy Development]
+    N9[/League Management/]
+    N10[/Player Scouting/]
+    N11[/Nutrition for Esports Athletes/]
+    N12[Training Regimen]
+    N13([Content Creation])
+    N14[[Game Server Management]]
+    N15[/Venue Setup/]
+    N16{Mental Health Support for Players}
+    N17([Rules and Regulations Enforcement])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Esports Education Programs
+        nest0_0[/Anti_Cheat Measures/]
+        nest0_1(Ticketing Sales)
+        nest0_2(Player Contracts)
+    end
+    subgraph Talent Representation
+        nest1_0[[Gambling and Betting Regulation]]
+        nest1_1[(Gaming Hardware Optimization)]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    N15 --> |leagues_creates| N16
+    N16 --> N17
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N15 -.-> nest0_0
+    nest0_2 -.-> N2
+    nest1_0 -.-> nest1_1
+    N14 -.-> nest1_0
+    nest1_1 --> N16
+    N12 -.-> S0
+    S0 -.-> N15
+    S0 --> N16
+    S0 --> N14
+    S0 --> N17
+    N12 --> S1
+    S1 --> N15
+    S1 --> N16
+    N10 --> S2
+    S2 --> N15
+    S2 -.-> N13
+    N8 -.-> M0
+    N2 --> M0
+    N10 -.-> M0
+    M0 -.-> N16
+    N0 -.-> M1
+    N3 -.-> M1
+    M1 -.-> N6
+    N2 -.-> M2
+    N3 -.-> M2
+    N6 -.-> M2
+    N7 -.-> M2
+    M2 -.-> N9
+    style N0 fill:#FAEBF3,stroke:#F7BEE0
+    style N1 fill:#F1F8E9,stroke:#388E3C
+    style N2 fill:#FAEBF3,stroke:#F7BEE0
+    style N3 fill:#FAEBF3,stroke:#F7BEE0
+    style N4 fill:#F1F8E9,stroke:#388E3C
+    style N5 fill:#FAEBF3,stroke:#F7BEE0
+    style N6 fill:#FAEBF3,stroke:#F7BEE0
+    style N7 fill:#FAEBF3,stroke:#F7BEE0
+    style N8 fill:#FAEBF3,stroke:#F7BEE0
+    style N9 fill:#FFF3E0,stroke:#FFB74D
+    style N10 fill:#FFF3E0,stroke:#FFB74D
+    style N11 fill:#FFF3E0,stroke:#FFB74D
+    style N12 fill:#FFF3E0,stroke:#FFB74D
+    style N13 fill:#F1F8E9,stroke:#388E3C
+    style N14 fill:#FAEBF3,stroke:#F7BEE0
+    style N15 fill:#FFF3E0,stroke:#FFB74D
+    style N16 fill:#FAEBF3,stroke:#F7BEE0
+    style N17 fill:#F1F8E9,stroke:#388E3C
+    style S0 fill:#FAEBF3,stroke:#F7BEE0
+    style S1 fill:#F1F8E9,stroke:#388E3C
+    style S2 fill:#FFF3E0,stroke:#FFB74D
+    style M0 fill:#F1F8E9,stroke:#388E3C
+    style M1 fill:#F1F8E9,stroke:#388E3C
+    style M2 fill:#FAEBF3,stroke:#F7BEE0
+    style nest0_0 fill:#FFF3E0,stroke:#FFB74D
+    style nest0_1 fill:#FFF3E0,stroke:#FFB74D
+    style nest0_2 fill:#FAEBF3,stroke:#F7BEE0
+    style nest1_0 fill:#FFF3E0,stroke:#FFB74D
+    style nest1_1 fill:#FAEBF3,stroke:#F7BEE0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 44 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 45 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 46 stroke:#388E3C,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_347.mmd b/test/mermaid/hard/mermaid_347.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..3c5f8fe4045e4c3f88e8f626d6b0b9d2c1e35759
--- /dev/null
+++ b/test/mermaid/hard/mermaid_347.mmd
@@ -0,0 +1,128 @@
+graph RL
+    N0([Network Infrastructure for Tournaments])
+    N1([Anti_Cheat Measures])
+    N2(Gambling and Betting Regulation)
+    N3[(Esports Education Programs)]
+    N4([Coaching Staff Management])
+    N5[[Social Media Management]]
+    N6[/Game Publisher Relations/]
+    N7[[Broadcast Technology for Esports]]
+    N8{Legal Advisory for Esports}
+    N9[Esports Team Ownership]
+    N10[/Data Security for Competitions/]
+    N11[Gaming Hardware Optimization]
+    N12(Training Regimen)
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Nutrition for Esports Athletes
+        nest0_0[/Team Management/]
+        nest0_1[Media Rights Negotiation]
+        nest0_2[(Ticketing Sales)]
+    end
+    subgraph Content Creation
+        nest1_0[[Game Server Management]]
+        nest1_1(Merchandise Sales)
+        nest1_2[[Fan Community Building]]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> |communities_fosters| N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    N11 --> N12
+    nest0_0 -.-> |organizes| nest0_1
+    nest0_1 -.-> nest0_2
+    N9 --> nest0_0
+    nest0_2 -.-> |teams_forms| N9
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N5 --> nest1_0
+    nest1_2 --> |strategies_develops| N10
+    N8 -.-> S1
+    S1 --> N11
+    S1 --> |competes| N12
+    N0 -.-> S2
+    S2 -.-> N2
+    S2 --> N5
+    S2 -.-> N7
+    N0 --> M0
+    N2 -.-> |reputations_builds| M0
+    N1 -.-> M0
+    M0 -.-> N6
+    N0 -.-> M1
+    N1 --> M1
+    M1 --> N5
+    N1 --> |platforms_develops| M2
+    N0 --> M2
+    M2 -.-> N4
+    style N0 fill:#E0F2F1,stroke:#4DB6AC
+    style N1 fill:#FFDCD6,stroke:#FFB2A5
+    style N2 fill:#E0F2F1,stroke:#4DB6AC
+    style N3 fill:#FFDCD6,stroke:#FFB2A5
+    style N4 fill:#E0F2F1,stroke:#4DB6AC
+    style N5 fill:#F0F0F0,stroke:#D2D2D2
+    style N6 fill:#E0F2F1,stroke:#4DB6AC
+    style N7 fill:#E0F2F1,stroke:#4DB6AC
+    style N8 fill:#FFDCD6,stroke:#FFB2A5
+    style N9 fill:#E0F2F1,stroke:#4DB6AC
+    style N10 fill:#E0F2F1,stroke:#4DB6AC
+    style N11 fill:#FFDCD6,stroke:#FFB2A5
+    style N12 fill:#F0F0F0,stroke:#D2D2D2
+    style S1 fill:#FFDCD6,stroke:#FFB2A5
+    style S2 fill:#E0F2F1,stroke:#4DB6AC
+    style M0 fill:#F0F0F0,stroke:#D2D2D2
+    style M1 fill:#FFDCD6,stroke:#FFB2A5
+    style M2 fill:#E0F2F1,stroke:#4DB6AC
+    style nest0_0 fill:#F0F0F0,stroke:#D2D2D2
+    style nest0_1 fill:#F0F0F0,stroke:#D2D2D2
+    style nest0_2 fill:#FFDCD6,stroke:#FFB2A5
+    style nest1_0 fill:#FFDCD6,stroke:#FFB2A5
+    style nest1_1 fill:#E0F2F1,stroke:#4DB6AC
+    style nest1_2 fill:#FFDCD6,stroke:#FFB2A5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#D2D2D2,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#D2D2D2,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_347.txt b/test/mermaid/hard/mermaid_347.txt
new file mode 100644
index 0000000000000000000000000000000000000000..13971833c545444cfc3071977904f3e3733751ae
--- /dev/null
+++ b/test/mermaid/hard/mermaid_347.txt
@@ -0,0 +1,37 @@
+<Anti_Cheat Measures, connectedTo, Gambling and Betting Regulation>
+<Anti_Cheat Measures, connectedTo, Game Publisher Relations>
+<Anti_Cheat Measures, connectedTo, Social Media Management>
+<Anti_Cheat Measures, platforms_develops, Coaching Staff Management>
+<Broadcast Technology for Esports, connectedTo, Legal Advisory for Esports>
+<Coaching Staff Management, connectedTo, Social Media Management>
+<Data Security for Competitions, connectedTo, Gaming Hardware Optimization>
+<Esports Education Programs, connectedTo, Coaching Staff Management>
+<Esports Team Ownership, connectedTo, Data Security for Competitions>
+<Esports Team Ownership, connectedTo, Team Management>
+<Fan Community Building, partOf, Content Creation>
+<Fan Community Building, strategies_develops, Data Security for Competitions>
+<Gambling and Betting Regulation, connectedTo, Esports Education Programs>
+<Gambling and Betting Regulation, reputations_builds, Game Publisher Relations>
+<Game Publisher Relations, communities_fosters, Broadcast Technology for Esports>
+<Game Server Management, connectedTo, Merchandise Sales>
+<Game Server Management, partOf, Content Creation>
+<Gaming Hardware Optimization, connectedTo, Training Regimen>
+<Legal Advisory for Esports, competes, Training Regimen>
+<Legal Advisory for Esports, connectedTo, Esports Team Ownership>
+<Legal Advisory for Esports, connectedTo, Gaming Hardware Optimization>
+<Media Rights Negotiation, connectedTo, Ticketing Sales>
+<Media Rights Negotiation, partOf, Nutrition for Esports Athletes>
+<Merchandise Sales, connectedTo, Fan Community Building>
+<Merchandise Sales, partOf, Content Creation>
+<Network Infrastructure for Tournaments, connectedTo, Anti_Cheat Measures>
+<Network Infrastructure for Tournaments, connectedTo, Broadcast Technology for Esports>
+<Network Infrastructure for Tournaments, connectedTo, Coaching Staff Management>
+<Network Infrastructure for Tournaments, connectedTo, Gambling and Betting Regulation>
+<Network Infrastructure for Tournaments, connectedTo, Game Publisher Relations>
+<Network Infrastructure for Tournaments, connectedTo, Social Media Management>
+<Social Media Management, connectedTo, Game Publisher Relations>
+<Social Media Management, connectedTo, Game Server Management>
+<Team Management, organizes, Media Rights Negotiation>
+<Team Management, partOf, Nutrition for Esports Athletes>
+<Ticketing Sales, partOf, Nutrition for Esports Athletes>
+<Ticketing Sales, teams_forms, Esports Team Ownership>
diff --git a/test/mermaid/hard/mermaid_348.mmd b/test/mermaid/hard/mermaid_348.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..1700c12d623a93bc83bad5ab11de4cf41aabab70
--- /dev/null
+++ b/test/mermaid/hard/mermaid_348.mmd
@@ -0,0 +1,146 @@
+graph RL
+    N0([Team Management])
+    N1[Game Server Management]
+    N2([League Management])
+    N3[/Brand Partnerships/]
+    N4[[Event Broadcasting]]
+    N5[Gaming Hardware Optimization]
+    N6(Legal Advisory for Esports)
+    N7[[Nutrition for Esports Athletes]]
+    N8[[Tournament Organization]]
+    N9(Ticketing Sales)
+    N10{Merchandise Sales}
+    N11(Rules and Regulations Enforcement)
+    N12[(Prize Pool Management)]
+    N13(Player Scouting)
+    N14{Mental Health Support for Players}
+    N15[/Audience Engagement/]
+    N16([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Esports Education Programs
+        nest0_0{Content Creation}
+        nest0_1[Player Wellness Programs]
+        nest0_2[/Esports Team Ownership/]
+        nest0_3[(Media Rights Negotiation)]
+    end
+    subgraph Broadcast Technology for Esports
+        nest1_0{Performance Analysis}
+        nest1_1[[Player Contracts]]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> |partners| N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> |teams_forms| N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    N15 -.-> N16
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N1 -.-> nest0_0
+    nest0_3 -.-> N2
+    nest1_0 -.-> nest1_1
+    N11 --> nest1_0
+    nest1_1 -.-> N2
+    N2 --> S0
+    S0 -.-> |platforms_develops| N11
+    S0 --> N15
+    N6 -.-> S1
+    S1 --> N16
+    S1 --> |performance_optimizes| N11
+    S1 -.-> N15
+    N8 -.-> S2
+    S2 --> N10
+    S2 -.-> N16
+    S2 --> N14
+    N1 -.-> |recruits| M0
+    N0 -.-> M0
+    M0 -.-> N16
+    N3 -.-> |merchandise_sells| M1
+    N8 -.-> M1
+    N4 --> M1
+    M1 --> N14
+    style N0 fill:#FFF8E1,stroke:#FFD54F
+    style N1 fill:#FFF8E1,stroke:#FFD54F
+    style N2 fill:#FFF8E1,stroke:#FFD54F
+    style N3 fill:#EDE7F6,stroke:#7E57C2
+    style N4 fill:#FFF8E1,stroke:#FFD54F
+    style N5 fill:#EDE7F6,stroke:#7E57C2
+    style N6 fill:#EFE6FF,stroke:#C2B2F0
+    style N7 fill:#FFF8E1,stroke:#FFD54F
+    style N8 fill:#EDE7F6,stroke:#7E57C2
+    style N9 fill:#FFF8E1,stroke:#FFD54F
+    style N10 fill:#FFF8E1,stroke:#FFD54F
+    style N11 fill:#FFF8E1,stroke:#FFD54F
+    style N12 fill:#EFE6FF,stroke:#C2B2F0
+    style N13 fill:#EFE6FF,stroke:#C2B2F0
+    style N14 fill:#EFE6FF,stroke:#C2B2F0
+    style N15 fill:#EFE6FF,stroke:#C2B2F0
+    style N16 fill:#EDE7F6,stroke:#7E57C2
+    style S0 fill:#EFE6FF,stroke:#C2B2F0
+    style S1 fill:#FFF8E1,stroke:#FFD54F
+    style S2 fill:#EFE6FF,stroke:#C2B2F0
+    style M0 fill:#EDE7F6,stroke:#7E57C2
+    style M1 fill:#EDE7F6,stroke:#7E57C2
+    style nest0_0 fill:#EFE6FF,stroke:#C2B2F0
+    style nest0_1 fill:#FFF8E1,stroke:#FFD54F
+    style nest0_2 fill:#EFE6FF,stroke:#C2B2F0
+    style nest0_3 fill:#FFF8E1,stroke:#FFD54F
+    style nest1_0 fill:#EDE7F6,stroke:#7E57C2
+    style nest1_1 fill:#FFF8E1,stroke:#FFD54F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#C2B2F0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_348.txt b/test/mermaid/hard/mermaid_348.txt
new file mode 100644
index 0000000000000000000000000000000000000000..99fed7f095937fd9e54a064b4993f046819a5a06
--- /dev/null
+++ b/test/mermaid/hard/mermaid_348.txt
@@ -0,0 +1,42 @@
+<Audience Engagement, connectedTo, end>
+<Brand Partnerships, merchandise_sells, Mental Health Support for Players>
+<Brand Partnerships, partners, Event Broadcasting>
+<Content Creation, connectedTo, Player Wellness Programs>
+<Content Creation, partOf, Esports Education Programs>
+<Esports Team Ownership, connectedTo, Media Rights Negotiation>
+<Esports Team Ownership, partOf, Esports Education Programs>
+<Event Broadcasting, connectedTo, Gaming Hardware Optimization>
+<Event Broadcasting, connectedTo, Mental Health Support for Players>
+<Game Server Management, connectedTo, Content Creation>
+<Game Server Management, connectedTo, League Management>
+<Game Server Management, recruits, end>
+<Gaming Hardware Optimization, connectedTo, Legal Advisory for Esports>
+<League Management, connectedTo, Audience Engagement>
+<League Management, connectedTo, Brand Partnerships>
+<League Management, platforms_develops, Rules and Regulations Enforcement>
+<Legal Advisory for Esports, connectedTo, Audience Engagement>
+<Legal Advisory for Esports, connectedTo, Nutrition for Esports Athletes>
+<Legal Advisory for Esports, connectedTo, end>
+<Legal Advisory for Esports, performance_optimizes, Rules and Regulations Enforcement>
+<Media Rights Negotiation, connectedTo, League Management>
+<Media Rights Negotiation, partOf, Esports Education Programs>
+<Mental Health Support for Players, connectedTo, Audience Engagement>
+<Merchandise Sales, connectedTo, Rules and Regulations Enforcement>
+<Nutrition for Esports Athletes, connectedTo, Tournament Organization>
+<Performance Analysis, connectedTo, Player Contracts>
+<Performance Analysis, partOf, Broadcast Technology for Esports>
+<Player Contracts, connectedTo, League Management>
+<Player Contracts, partOf, Broadcast Technology for Esports>
+<Player Scouting, connectedTo, Mental Health Support for Players>
+<Player Wellness Programs, connectedTo, Esports Team Ownership>
+<Player Wellness Programs, partOf, Esports Education Programs>
+<Prize Pool Management, connectedTo, Player Scouting>
+<Rules and Regulations Enforcement, connectedTo, Performance Analysis>
+<Rules and Regulations Enforcement, connectedTo, Prize Pool Management>
+<Team Management, connectedTo, Game Server Management>
+<Team Management, connectedTo, end>
+<Ticketing Sales, teams_forms, Merchandise Sales>
+<Tournament Organization, connectedTo, Mental Health Support for Players>
+<Tournament Organization, connectedTo, Merchandise Sales>
+<Tournament Organization, connectedTo, Ticketing Sales>
+<Tournament Organization, connectedTo, end>
diff --git a/test/mermaid/hard/mermaid_349.txt b/test/mermaid/hard/mermaid_349.txt
new file mode 100644
index 0000000000000000000000000000000000000000..d841839025ea741368b44bd7ce390913685a2459
--- /dev/null
+++ b/test/mermaid/hard/mermaid_349.txt
@@ -0,0 +1,40 @@
+<Aging Brain Research, connectedTo, Neurotransmitter Research>
+<Artificial Neural Networks Modeling, connectedTo, Consciousness Studies>
+<Artificial Neural Networks Modeling, partOf, Memory Formation Research>
+<Brain Imaging, partOf, Connectomics>
+<Brain Imaging, processes_data, Spike Train Analysis>
+<Cognitive Neuroscience, connectedTo, Deep Brain Stimulation>
+<Computational Neuroscience, interprets_data, Sleep Research>
+<Consciousness Studies, connectedTo, Neural Data Analysis>
+<Consciousness Studies, partOf, Memory Formation Research>
+<Deep Brain Stimulation, connectedTo, Aging Brain Research>
+<Deep Brain Stimulation, researches, Transcranial Magnetic Stimulation>
+<Drug Development for Brain Disorders, circuits_understands, Gene Therapy for Neurological Disorders>
+<Gene Therapy for Neurological Disorders, connectedTo, Cognitive Neuroscience>
+<Genetic Basis of Brain Disorders, connectedTo, Synaptic Plasticity Study>
+<Learning Mechanisms Study, connectedTo, Neuroethics>
+<Learning Mechanisms Study, connectedTo, Neuroinformatics>
+<Molecular Neuroscience, connectedTo, Cellular Neuroscience>
+<Neural Data Analysis, connectedTo, Pain Perception Research>
+<Neuroethics, connectedTo, Molecular Neuroscience>
+<Neuroinformatics, connectedTo, Artificial Neural Networks Modeling>
+<Neuroinformatics, partOf, Memory Formation Research>
+<Neurotransmitter Research, connectedTo, Learning Mechanisms Study>
+<Optogenetics, connectedTo, Aging Brain Research>
+<Optogenetics, partOf, Connectomics>
+<Pain Perception Research, connectedTo, Stem Cell Research>
+<Sleep Research, connectedTo, Aging Brain Research>
+<Sleep Research, connectedTo, Molecular Neuroscience>
+<Sleep Research, connectedTo, Neurotransmitter Research>
+<Spike Train Analysis, connectedTo, Optogenetics>
+<Spike Train Analysis, partOf, Connectomics>
+<Stem Cell Research, connectedTo, Aging Brain Research>
+<Stem Cell Research, connectedTo, Genetic Basis of Brain Disorders>
+<Stem Cell Research, connectedTo, Neurotransmitter Research>
+<Stem Cell Research, connectedTo, Synaptic Plasticity Study>
+<Stem Cell Research, connectedTo, Systems Neuroscience>
+<Synaptic Plasticity Study, connectedTo, Aging Brain Research>
+<Synaptic Plasticity Study, tools_creates, Computational Neuroscience>
+<Systems Neuroscience, connectedTo, Brain Imaging>
+<Systems Neuroscience, partOf, Connectomics>
+<Transcranial Magnetic Stimulation, connectedTo, Neural Data Analysis>
diff --git a/test/mermaid/hard/mermaid_35.mmd b/test/mermaid/hard/mermaid_35.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..0260d373b52d7ce45c2f0030b88587b2dbba5e13
--- /dev/null
+++ b/test/mermaid/hard/mermaid_35.mmd
@@ -0,0 +1,116 @@
+graph LR
+    N0([Travel Insurance])
+    N1(Custom Tour Package Creation)
+    N2[Flight Booking]
+    N3[(Duty_Free Shopping)]
+    N4{Booking Modification}
+    N5([Hotel Check_in])
+    N6(Restaurant Reservation)
+    N7[/Spa Appointment/]
+    N8[Group Tour Coordination]
+    N9{Visa Application}
+    N10([Language Translation Service])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    subgraph Tour Guide Assignment
+        nest0_0(Tourist Information Desk)
+        nest0_1[/Photo Capture/]
+        nest0_2([Travel Blog Creation])
+    end
+    subgraph Itinerary Planning
+        nest1_0{Currency Exchange}
+        nest1_1([Event Reservation])
+        nest1_2[[Airport Transfer]]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    nest0_0 --> nest0_1
+    nest0_1 --> |automates| nest0_2
+    N8 --> nest0_0
+    nest0_2 -.-> N6
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N4 --> nest1_0
+    nest1_2 -.-> N8
+    N3 -.-> S0
+    S0 -.-> N9
+    S0 -.-> N7
+    S0 -.-> N8
+    N2 -.-> S1
+    S1 -.-> N9
+    S1 --> N8
+    N1 -.-> S2
+    S2 -.-> N8
+    S2 -.-> N3
+    S2 --> N10
+    N0 -.-> M0
+    N2 --> M0
+    N3 --> M0
+    N1 -.-> M0
+    M0 --> N5
+    style N0 fill:#EDF5F3,stroke:#A1D7CD
+    style N1 fill:#C5CAE9,stroke:#3F51B5
+    style N2 fill:#C5CAE9,stroke:#3F51B5
+    style N3 fill:#C5CAE9,stroke:#3F51B5
+    style N4 fill:#C5CAE9,stroke:#3F51B5
+    style N5 fill:#EDE7F6,stroke:#7E57C2
+    style N6 fill:#C5CAE9,stroke:#3F51B5
+    style N7 fill:#C5CAE9,stroke:#3F51B5
+    style N8 fill:#EDF5F3,stroke:#A1D7CD
+    style N9 fill:#C5CAE9,stroke:#3F51B5
+    style N10 fill:#EDE7F6,stroke:#7E57C2
+    style S0 fill:#C5CAE9,stroke:#3F51B5
+    style S1 fill:#EDF5F3,stroke:#A1D7CD
+    style S2 fill:#C5CAE9,stroke:#3F51B5
+    style M0 fill:#EDF5F3,stroke:#A1D7CD
+    style nest0_0 fill:#C5CAE9,stroke:#3F51B5
+    style nest0_1 fill:#C5CAE9,stroke:#3F51B5
+    style nest0_2 fill:#C5CAE9,stroke:#3F51B5
+    style nest1_0 fill:#EDF5F3,stroke:#A1D7CD
+    style nest1_1 fill:#EDE7F6,stroke:#7E57C2
+    style nest1_2 fill:#EDE7F6,stroke:#7E57C2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#A1D7CD,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_350.txt b/test/mermaid/hard/mermaid_350.txt
new file mode 100644
index 0000000000000000000000000000000000000000..bfffb390ed42a2b58d4be798e9dc4a77a2157a93
--- /dev/null
+++ b/test/mermaid/hard/mermaid_350.txt
@@ -0,0 +1,32 @@
+<Brain Mapping, connectedTo, Sensory Perception Research>
+<Brain Mapping, partOf, Neurodegenerative Disease Research>
+<Cellular Neuroscience, connectedTo, Brain Mapping>
+<Cellular Neuroscience, partOf, Neurodegenerative Disease Research>
+<Computational Neuroscience, behavior_links, Developmental Neuroscience>
+<Computational Neuroscience, connectedTo, Gene Therapy for Neurological Disorders>
+<Computational Neuroscience, connectedTo, Motor Control Research>
+<Deep Brain Stimulation, connectedTo, Transcranial Magnetic Stimulation>
+<Deep Brain Stimulation, partOf, Optogenetics>
+<Developmental Neuroscience, connectedTo, Neurofeedback Therapy>
+<Developmental Neuroscience, partOf, Optogenetics>
+<Drug Development for Brain Disorders, connectedTo, Computational Neuroscience>
+<Molecular Neuroscience, connectedTo, Drug Development for Brain Disorders>
+<Motor Control Research, connectedTo, Cellular Neuroscience>
+<Motor Control Research, partOf, Neurodegenerative Disease Research>
+<Neuroethics, connectedTo, Deep Brain Stimulation>
+<Neuroethics, partOf, Optogenetics>
+<Neurofeedback Therapy, partOf, Optogenetics>
+<Neurofeedback Therapy, regulates, Neuroethics>
+<Neuroinformatics, connectedTo, Sensory Perception Research>
+<Sensory Perception Research, connectedTo, Computational Neuroscience>
+<Sensory Perception Research, connectedTo, Gene Therapy for Neurological Disorders>
+<Sensory Perception Research, connectedTo, Molecular Neuroscience>
+<Sensory Perception Research, connectedTo, Transcranial Magnetic Stimulation>
+<Sensory Perception Research, studies, Computational Neuroscience>
+<Systems Neuroscience, connectedTo, Neuroinformatics>
+<Systems Neuroscience, connectedTo, Transcranial Magnetic Stimulation>
+<Transcranial Magnetic Stimulation, connectedTo, Gene Therapy for Neurological Disorders>
+<Transcranial Magnetic Stimulation, connectedTo, Molecular Neuroscience>
+<Transcranial Magnetic Stimulation, ethical_considers, Computational Neuroscience>
+<start, analyzes, Transcranial Magnetic Stimulation>
+<start, connectedTo, Systems Neuroscience>
diff --git a/test/mermaid/hard/mermaid_351.mmd b/test/mermaid/hard/mermaid_351.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..440084a712cdfccdf3a008fd848ed1cc41bcd619
--- /dev/null
+++ b/test/mermaid/hard/mermaid_351.mmd
@@ -0,0 +1,100 @@
+graph BT
+    N0([Sensory Perception Research])
+    N1[/Cognitive Neuroscience/]
+    N2[(Neurofeedback Therapy)]
+    N3(Artificial Neural Networks Modeling)
+    N4[Stem Cell Research]
+    N5(Neurodegenerative Disease Research)
+    N6{Sleep Research}
+    N7([Neurotransmitter Research])
+    N8(Pain Perception Research)
+    N9[/Spike Train Analysis/]
+    N10[Genetic Basis of Brain Disorders]
+    S1(( ))
+    S2(( ))
+    subgraph Electrophysiology
+        nest0_0[/Synaptic Plasticity Study/]
+        nest0_1{Neurological Disorder Diagnosis}
+        nest0_2[Motor Control Research]
+    end
+    subgraph Transcranial Magnetic Stimulation
+        nest1_0[Learning Mechanisms Study]
+        nest1_1([Neuroprosthetics])
+        nest1_2(Brain_Computer Interface)
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> |complies| N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    N9 -.-> N10
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    N4 -.-> nest0_0
+    nest0_2 --> N5
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N9 -.-> nest1_0
+    nest1_2 --> N7
+    N2 --> S1
+    S1 --> N8
+    S1 --> N10
+    S1 -.-> |analyzes| N7
+    N0 --> S2
+    S2 --> N8
+    S2 --> N5
+    N1 -.-> N4
+    N3 --> nest0_0
+    N6 -.-> nest0_2
+    style N0 fill:#FFCCBC,stroke:#FF5722
+    style N1 fill:#FFCCBC,stroke:#FF5722
+    style N2 fill:#FFF6D9,stroke:#FFCC7A
+    style N3 fill:#FFCCBC,stroke:#FF5722
+    style N4 fill:#FFCCBC,stroke:#FF5722
+    style N5 fill:#FFF6D9,stroke:#FFCC7A
+    style N6 fill:#E1BEE7,stroke:#9C27B0
+    style N7 fill:#E1BEE7,stroke:#9C27B0
+    style N8 fill:#FFF6D9,stroke:#FFCC7A
+    style N9 fill:#FFF6D9,stroke:#FFCC7A
+    style N10 fill:#FFCCBC,stroke:#FF5722
+    style S1 fill:#FFF6D9,stroke:#FFCC7A
+    style S2 fill:#FFCCBC,stroke:#FF5722
+    style nest0_0 fill:#FFF6D9,stroke:#FFCC7A
+    style nest0_1 fill:#E1BEE7,stroke:#9C27B0
+    style nest0_2 fill:#FFF6D9,stroke:#FFCC7A
+    style nest1_0 fill:#FFCCBC,stroke:#FF5722
+    style nest1_1 fill:#FFCCBC,stroke:#FF5722
+    style nest1_2 fill:#E1BEE7,stroke:#9C27B0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#9C27B0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FF5722,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_351.txt b/test/mermaid/hard/mermaid_351.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b78b87c0c3cc4795a6669200e21ce0c77f2d7912
--- /dev/null
+++ b/test/mermaid/hard/mermaid_351.txt
@@ -0,0 +1,32 @@
+<Artificial Neural Networks Modeling, connectedTo, Stem Cell Research>
+<Artificial Neural Networks Modeling, connectedTo, Synaptic Plasticity Study>
+<Brain_Computer Interface, connectedTo, Neurotransmitter Research>
+<Brain_Computer Interface, partOf, Transcranial Magnetic Stimulation>
+<Cognitive Neuroscience, connectedTo, Neurofeedback Therapy>
+<Cognitive Neuroscience, connectedTo, Stem Cell Research>
+<Learning Mechanisms Study, connectedTo, Neuroprosthetics>
+<Learning Mechanisms Study, partOf, Transcranial Magnetic Stimulation>
+<Motor Control Research, connectedTo, Neurodegenerative Disease Research>
+<Motor Control Research, partOf, Electrophysiology>
+<Neurodegenerative Disease Research, complies, Sleep Research>
+<Neurofeedback Therapy, analyzes, Neurotransmitter Research>
+<Neurofeedback Therapy, connectedTo, Artificial Neural Networks Modeling>
+<Neurofeedback Therapy, connectedTo, Genetic Basis of Brain Disorders>
+<Neurofeedback Therapy, connectedTo, Pain Perception Research>
+<Neurological Disorder Diagnosis, connectedTo, Motor Control Research>
+<Neurological Disorder Diagnosis, partOf, Electrophysiology>
+<Neuroprosthetics, connectedTo, Brain_Computer Interface>
+<Neuroprosthetics, partOf, Transcranial Magnetic Stimulation>
+<Neurotransmitter Research, connectedTo, Pain Perception Research>
+<Pain Perception Research, connectedTo, Spike Train Analysis>
+<Sensory Perception Research, connectedTo, Cognitive Neuroscience>
+<Sensory Perception Research, connectedTo, Neurodegenerative Disease Research>
+<Sensory Perception Research, connectedTo, Pain Perception Research>
+<Sleep Research, connectedTo, Motor Control Research>
+<Sleep Research, connectedTo, Neurotransmitter Research>
+<Spike Train Analysis, connectedTo, Genetic Basis of Brain Disorders>
+<Spike Train Analysis, connectedTo, Learning Mechanisms Study>
+<Stem Cell Research, connectedTo, Neurodegenerative Disease Research>
+<Stem Cell Research, connectedTo, Synaptic Plasticity Study>
+<Synaptic Plasticity Study, connectedTo, Neurological Disorder Diagnosis>
+<Synaptic Plasticity Study, partOf, Electrophysiology>
diff --git a/test/mermaid/hard/mermaid_352.mmd b/test/mermaid/hard/mermaid_352.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..b1bbfd757dd73050e290ba31b9bcb531293a20ab
--- /dev/null
+++ b/test/mermaid/hard/mermaid_352.mmd
@@ -0,0 +1,109 @@
+graph TD
+    N0([start])
+    N1[Intangible Cultural Heritage Preservation]
+    N2{Sustainable Heritage Management}
+    N3[[Virtual Reality Recreations]]
+    N4[[Photogrammetry for Documentation]]
+    N5([3D Scanning of Artifacts])
+    N6[[GIS Mapping for Heritage Sites]]
+    N7([Heritage Site Management])
+    N8(Museum Collection Management)
+    N9[(Archival Management)]
+    N10[/Community Engagement/]
+    N11[Crowdsourcing for Heritage Data]
+    N12[Artifact Conservation]
+    N13(Indigenous Cultural Heritage Rights)
+    N14([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Legal Protection for Heritage
+        nest0_0[Underwater Cultural Heritage]
+        nest0_1[[Augmented Reality Tours]]
+        nest0_2([Public Education Programs])
+    end
+    subgraph Digital Documentation
+        nest1_0(Risk Assessment for Heritage)
+        nest1_1[[Disaster Preparedness for Heritage]]
+        nest1_2(Digital Storytelling)
+    end
+    N0 --> |yes| N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 --> N14
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N8 --> nest0_0
+    nest0_2 --> |yes| N2
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N10 --> nest1_0
+    nest1_2 --> N14
+    N2 -.-> S0
+    S0 -.-> N6
+    S0 --> N12
+    S0 -.-> |yes| N9
+    N0 --> S1
+    S1 --> N7
+    S1 -.-> N14
+    N9 -.-> M0
+    N1 --> M0
+    N4 --> M0
+    M0 --> N13
+    N7 --> M1
+    N4 --> M1
+    N1 -.-> M1
+    M1 -.-> N14
+    style S0 fill:#EDF5F3,stroke:#A1D7CD
+    style S1 fill:#EDF5F3,stroke:#A1D7CD
+    style M0 fill:#FFE88D,stroke:#FFDA4E
+    style M1 fill:#FFEBEB,stroke:#FFC2C2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#A1D7CD,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#A1D7CD,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_352.txt b/test/mermaid/hard/mermaid_352.txt
new file mode 100644
index 0000000000000000000000000000000000000000..01ea6950ebfa3fb21470ebd043f190ee37a01af1
--- /dev/null
+++ b/test/mermaid/hard/mermaid_352.txt
@@ -0,0 +1,39 @@
+<3D Scanning of Artifacts, connectedTo, GIS Mapping for Heritage Sites>
+<Archival Management, connectedTo, Community Engagement>
+<Archival Management, connectedTo, Indigenous Cultural Heritage Rights>
+<Artifact Conservation, connectedTo, Indigenous Cultural Heritage Rights>
+<Augmented Reality Tours, connectedTo, Public Education Programs>
+<Augmented Reality Tours, partOf, Legal Protection for Heritage>
+<Community Engagement, connectedTo, Crowdsourcing for Heritage Data>
+<Community Engagement, connectedTo, Risk Assessment for Heritage>
+<Crowdsourcing for Heritage Data, connectedTo, Artifact Conservation>
+<Digital Storytelling, connectedTo, end>
+<Digital Storytelling, partOf, Digital Documentation>
+<Disaster Preparedness for Heritage, connectedTo, Digital Storytelling>
+<Disaster Preparedness for Heritage, partOf, Digital Documentation>
+<GIS Mapping for Heritage Sites, connectedTo, Heritage Site Management>
+<Heritage Site Management, connectedTo, Museum Collection Management>
+<Heritage Site Management, connectedTo, end>
+<Indigenous Cultural Heritage Rights, connectedTo, end>
+<Intangible Cultural Heritage Preservation, connectedTo, Indigenous Cultural Heritage Rights>
+<Intangible Cultural Heritage Preservation, connectedTo, Sustainable Heritage Management>
+<Intangible Cultural Heritage Preservation, connectedTo, end>
+<Museum Collection Management, connectedTo, Archival Management>
+<Museum Collection Management, connectedTo, Underwater Cultural Heritage>
+<Photogrammetry for Documentation, connectedTo, 3D Scanning of Artifacts>
+<Photogrammetry for Documentation, connectedTo, Indigenous Cultural Heritage Rights>
+<Photogrammetry for Documentation, connectedTo, end>
+<Public Education Programs, partOf, Legal Protection for Heritage>
+<Public Education Programs, yes, Sustainable Heritage Management>
+<Risk Assessment for Heritage, connectedTo, Disaster Preparedness for Heritage>
+<Risk Assessment for Heritage, partOf, Digital Documentation>
+<Sustainable Heritage Management, connectedTo, Artifact Conservation>
+<Sustainable Heritage Management, connectedTo, GIS Mapping for Heritage Sites>
+<Sustainable Heritage Management, connectedTo, Virtual Reality Recreations>
+<Sustainable Heritage Management, yes, Archival Management>
+<Underwater Cultural Heritage, connectedTo, Augmented Reality Tours>
+<Underwater Cultural Heritage, partOf, Legal Protection for Heritage>
+<Virtual Reality Recreations, connectedTo, Photogrammetry for Documentation>
+<start, connectedTo, Heritage Site Management>
+<start, connectedTo, end>
+<start, yes, Intangible Cultural Heritage Preservation>
diff --git a/test/mermaid/hard/mermaid_353.mmd b/test/mermaid/hard/mermaid_353.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..1f115377b6e0a8dca377ffc2d0ff265ec350260b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_353.mmd
@@ -0,0 +1,119 @@
+graph RL
+    N0([start])
+    N1[Virtual Reality Recreations]
+    N2[/Material Analysis/]
+    N3[Community Engagement]
+    N4(Augmented Reality Tours)
+    N5[/Photogrammetry for Documentation/]
+    N6[Site Preservation]
+    N7[Illicit Trafficking Control]
+    N8[Heritage Site Management]
+    N9{Remote Sensing for Heritage}
+    N10[[Oral History Collection]]
+    N11([Climate Change Impact on Heritage])
+    N12([Artifact Conservation])
+    N13(Underwater Cultural Heritage)
+    N14[Exhibition Curation]
+    N15[3D Scanning of Artifacts]
+    N16(Legal Protection for Heritage)
+    N17(Risk Assessment for Heritage)
+    N18([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Disaster Preparedness for Heritage
+        nest0_0{Heritage Impact Assessment}
+        nest0_1(Crowdsourcing for Heritage Data)
+        nest0_2([GIS Mapping for Heritage Sites])
+        nest0_3[/Intangible Cultural Heritage Preservation/]
+    end
+    subgraph Looting Prevention
+        nest1_0(Restoration Techniques)
+        nest1_1([Museum Collection Management])
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 --> N14
+    N14 --> N15
+    N15 --> N16
+    N16 --> N17
+    N17 -.-> N18
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N16 -.-> nest0_0
+    nest0_3 -.-> N3
+    nest1_0 --> nest1_1
+    N1 --> nest1_0
+    nest1_1 --> N15
+    N0 -.-> S0
+    S0 --> N5
+    S0 --> N4
+    N9 -.-> S1
+    S1 --> N11
+    S1 -.-> N14
+    N9 --> M0
+    N11 -.-> M0
+    N12 -.-> M0
+    N6 --> M0
+    M0 -.-> N18
+    N3 -.-> M1
+    N6 -.-> M1
+    M1 -.-> N17
+    style S0 fill:#FFFDE7,stroke:#FBC02D
+    style S1 fill:#F1F8E9,stroke:#81C784
+    style M0 fill:#FFF8E1,stroke:#FFD54F
+    style M1 fill:#FFF8E1,stroke:#FFD54F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#81C784,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_353.txt b/test/mermaid/hard/mermaid_353.txt
new file mode 100644
index 0000000000000000000000000000000000000000..95b13d3ddd365fbd7a45aeed85bfb8fa6300eefc
--- /dev/null
+++ b/test/mermaid/hard/mermaid_353.txt
@@ -0,0 +1,42 @@
+<3D Scanning of Artifacts, connectedTo, Legal Protection for Heritage>
+<Artifact Conservation, connectedTo, Underwater Cultural Heritage>
+<Artifact Conservation, connectedTo, end>
+<Augmented Reality Tours, connectedTo, Photogrammetry for Documentation>
+<Climate Change Impact on Heritage, connectedTo, Artifact Conservation>
+<Climate Change Impact on Heritage, connectedTo, end>
+<Community Engagement, connectedTo, Augmented Reality Tours>
+<Community Engagement, connectedTo, Risk Assessment for Heritage>
+<Crowdsourcing for Heritage Data, connectedTo, GIS Mapping for Heritage Sites>
+<Crowdsourcing for Heritage Data, partOf, Disaster Preparedness for Heritage>
+<Exhibition Curation, connectedTo, 3D Scanning of Artifacts>
+<GIS Mapping for Heritage Sites, connectedTo, Intangible Cultural Heritage Preservation>
+<GIS Mapping for Heritage Sites, partOf, Disaster Preparedness for Heritage>
+<Heritage Impact Assessment, connectedTo, Crowdsourcing for Heritage Data>
+<Heritage Impact Assessment, partOf, Disaster Preparedness for Heritage>
+<Heritage Site Management, connectedTo, Remote Sensing for Heritage>
+<Illicit Trafficking Control, connectedTo, Heritage Site Management>
+<Intangible Cultural Heritage Preservation, connectedTo, Community Engagement>
+<Intangible Cultural Heritage Preservation, partOf, Disaster Preparedness for Heritage>
+<Legal Protection for Heritage, connectedTo, Heritage Impact Assessment>
+<Legal Protection for Heritage, connectedTo, Risk Assessment for Heritage>
+<Material Analysis, connectedTo, Community Engagement>
+<Museum Collection Management, connectedTo, 3D Scanning of Artifacts>
+<Museum Collection Management, partOf, Looting Prevention>
+<Oral History Collection, connectedTo, Climate Change Impact on Heritage>
+<Photogrammetry for Documentation, connectedTo, Site Preservation>
+<Remote Sensing for Heritage, connectedTo, Climate Change Impact on Heritage>
+<Remote Sensing for Heritage, connectedTo, Exhibition Curation>
+<Remote Sensing for Heritage, connectedTo, Oral History Collection>
+<Remote Sensing for Heritage, connectedTo, end>
+<Restoration Techniques, connectedTo, Museum Collection Management>
+<Restoration Techniques, partOf, Looting Prevention>
+<Risk Assessment for Heritage, connectedTo, end>
+<Site Preservation, connectedTo, Illicit Trafficking Control>
+<Site Preservation, connectedTo, Risk Assessment for Heritage>
+<Site Preservation, connectedTo, end>
+<Underwater Cultural Heritage, connectedTo, Exhibition Curation>
+<Virtual Reality Recreations, connectedTo, Material Analysis>
+<Virtual Reality Recreations, connectedTo, Restoration Techniques>
+<start, connectedTo, Augmented Reality Tours>
+<start, connectedTo, Photogrammetry for Documentation>
+<start, connectedTo, Virtual Reality Recreations>
diff --git a/test/mermaid/hard/mermaid_355.mmd b/test/mermaid/hard/mermaid_355.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..3db0686207ad75fe12b0b886e834e76d341f6f45
--- /dev/null
+++ b/test/mermaid/hard/mermaid_355.mmd
@@ -0,0 +1,92 @@
+graph TD
+    N0([start])
+    N1([Biosensor Development])
+    N2([CRISPR_Cas System Optimization])
+    N3(Public Engagement)
+    N4[Diagnostic Tool Development]
+    N5(Cellular Reprogramming)
+    N6(Bio_manufacturing)
+    N7[(Directed Evolution Automation)]
+    N8[/Directed Evolution/]
+    N9[(Gene Therapy Delivery Systems)]
+    S0(( ))
+    S1(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Biosafety Level Management
+        nest0_0{Synthetic Gene Networks}
+        nest0_1(Cell_Free Systems)
+        nest0_2{Genetic Circuit Design}
+    end
+    subgraph Bio_computation
+        nest1_0[/Automated Biology Workflows/]
+        nest1_1[DNA Synthesis]
+        nest1_2{Regulatory Frameworks}
+    end
+    N0 -.-> N1
+    N1 -.-> |no| N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> |no| N7
+    N7 --> N8
+    N8 -.-> N9
+    nest0_0 --> nest0_1
+    nest0_1 --> |no| nest0_2
+    N1 --> nest0_0
+    nest0_2 -.-> N7
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N1 -.-> nest1_0
+    nest1_2 --> N7
+    N1 -.-> S0
+    S0 -.-> N9
+    S0 --> N3
+    N5 -.-> S1
+    S1 -.-> N7
+    S1 --> N8
+    S1 --> N9
+    N3 -.-> M1
+    N2 --> |no| M1
+    N0 --> M1
+    M1 -.-> N6
+    N0 --> M2
+    N1 --> M2
+    M2 --> N4
+    style S0 fill:#D1C4E9,stroke:#673AB7
+    style S1 fill:#F0F4C3,stroke:#AED581
+    style M1 fill:#DFE7EB,stroke:#B0C5CD
+    style M2 fill:#F0F4C3,stroke:#AED581
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#673AB7,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_356.mmd b/test/mermaid/hard/mermaid_356.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..21673b0ca0a088d09c838ce559c5d9aef95466eb
--- /dev/null
+++ b/test/mermaid/hard/mermaid_356.mmd
@@ -0,0 +1,124 @@
+graph LR
+    N0([start])
+    N1(Biofoundry Operations)
+    N2{Metabolic Pathway Engineering}
+    N3[[CRISPR_Cas System Optimization]]
+    N4[Bio_manufacturing]
+    N5[(Modular Biology Design)]
+    N6(Diagnostic Tool Development)
+    N7([Gene Synthesis Platforms])
+    N8([Biofuel Production])
+    N9[Cellular Reprogramming]
+    N10(Bio_logic Gates)
+    N11(Protein Design)
+    N12(Computational Design of Biological Systems)
+    N13([Ethical Implications])
+    N14[Regulatory Frameworks]
+    N15(Automated Biology Workflows)
+    N16(Drug Delivery Systems)
+    N17(Risk Assessment)
+    N18([Novel Enzyme Creation])
+    N19([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Biosecurity Protocols
+        nest0_0[Biosafety Level Management]
+        nest0_1{Public Engagement}
+        nest0_2(Gene Therapy Delivery Systems)
+    end
+    subgraph Bioremediation Applications
+        nest1_0(Directed Evolution)
+        nest1_1[[Biosensor Development]]
+        nest1_2[/Biocontainment Strategies/]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> |yes| N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 --> |yes| N16
+    N16 --> N17
+    N17 -.-> N18
+    N18 --> N19
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N8 -.-> |yes| nest0_0
+    nest0_2 --> N6
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N4 --> nest1_0
+    nest1_2 -.-> |no| N1
+    N13 -.-> S0
+    S0 --> N15
+    S0 -.-> |no| N17
+    N5 -.-> S1
+    S1 -.-> N7
+    S1 -.-> |no| N8
+    S1 -.-> N12
+    N3 --> M0
+    N5 -.-> |yes| M0
+    N0 -.-> M0
+    M0 -.-> N9
+    N12 -.-> M1
+    N11 --> M1
+    N5 -.-> |no| M1
+    M1 --> N16
+    style S0 fill:#FDFCEB,stroke:#EAEFA5
+    style S1 fill:#FDFCEB,stroke:#EAEFA5
+    style M0 fill:#E8F5E9,stroke:#66BB6A
+    style M1 fill:#FDFCEB,stroke:#EAEFA5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#EAEFA5,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#66BB6A,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_356.txt b/test/mermaid/hard/mermaid_356.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e9954e7bdc633ce23ac2fe845f6fa11c9a15dd06
--- /dev/null
+++ b/test/mermaid/hard/mermaid_356.txt
@@ -0,0 +1,44 @@
+<Automated Biology Workflows, yes, Drug Delivery Systems>
+<Bio_logic Gates, connectedTo, Protein Design>
+<Bio_manufacturing, connectedTo, Directed Evolution>
+<Bio_manufacturing, connectedTo, Modular Biology Design>
+<Biocontainment Strategies, no, Biofoundry Operations>
+<Biocontainment Strategies, partOf, Bioremediation Applications>
+<Biofoundry Operations, connectedTo, Metabolic Pathway Engineering>
+<Biofuel Production, connectedTo, Cellular Reprogramming>
+<Biofuel Production, yes, Biosafety Level Management>
+<Biosafety Level Management, connectedTo, Public Engagement>
+<Biosafety Level Management, partOf, Biosecurity Protocols>
+<Biosensor Development, connectedTo, Biocontainment Strategies>
+<Biosensor Development, partOf, Bioremediation Applications>
+<CRISPR_Cas System Optimization, connectedTo, Bio_manufacturing>
+<CRISPR_Cas System Optimization, connectedTo, Cellular Reprogramming>
+<Cellular Reprogramming, connectedTo, Bio_logic Gates>
+<Computational Design of Biological Systems, connectedTo, Drug Delivery Systems>
+<Computational Design of Biological Systems, connectedTo, Ethical Implications>
+<Diagnostic Tool Development, connectedTo, Gene Synthesis Platforms>
+<Directed Evolution, connectedTo, Biosensor Development>
+<Directed Evolution, partOf, Bioremediation Applications>
+<Drug Delivery Systems, connectedTo, Risk Assessment>
+<Ethical Implications, connectedTo, Automated Biology Workflows>
+<Ethical Implications, connectedTo, Regulatory Frameworks>
+<Ethical Implications, no, Risk Assessment>
+<Gene Synthesis Platforms, connectedTo, Biofuel Production>
+<Gene Therapy Delivery Systems, connectedTo, Diagnostic Tool Development>
+<Gene Therapy Delivery Systems, partOf, Biosecurity Protocols>
+<Metabolic Pathway Engineering, yes, CRISPR_Cas System Optimization>
+<Modular Biology Design, connectedTo, Computational Design of Biological Systems>
+<Modular Biology Design, connectedTo, Diagnostic Tool Development>
+<Modular Biology Design, connectedTo, Gene Synthesis Platforms>
+<Modular Biology Design, no, Biofuel Production>
+<Modular Biology Design, no, Drug Delivery Systems>
+<Modular Biology Design, yes, Cellular Reprogramming>
+<Novel Enzyme Creation, connectedTo, end>
+<Protein Design, connectedTo, Computational Design of Biological Systems>
+<Protein Design, connectedTo, Drug Delivery Systems>
+<Public Engagement, connectedTo, Gene Therapy Delivery Systems>
+<Public Engagement, partOf, Biosecurity Protocols>
+<Regulatory Frameworks, connectedTo, Automated Biology Workflows>
+<Risk Assessment, connectedTo, Novel Enzyme Creation>
+<start, connectedTo, Biofoundry Operations>
+<start, connectedTo, Cellular Reprogramming>
diff --git a/test/mermaid/hard/mermaid_357.mmd b/test/mermaid/hard/mermaid_357.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..d9a2aab38b701ef3a541545374e3d03f9c4c5f7e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_357.mmd
@@ -0,0 +1,112 @@
+graph LR
+    N0([start])
+    N1[Modular Biology Design]
+    N2[Genetic Circuit Design]
+    N3[[Synthetic Gene Networks]]
+    N4[Directed Evolution]
+    N5[[Artificial Cells]]
+    N6{Gene Therapy Delivery Systems}
+    N7(Bio_manufacturing)
+    N8[(Protein Design)]
+    N9[(Synthetic Organism Design)]
+    N10(Biosensor Development)
+    N11[Automated Biology Workflows]
+    N12(Directed Evolution Automation)
+    N13[(Risk Assessment)]
+    N14(Biosafety Level Management)
+    N15[DNA Storage Technologies]
+    N16[[Cellular Reprogramming]]
+    N17([Diagnostic Tool Development])
+    N18(High_Throughput Screening)
+    N19([end])
+    S0(( ))
+    S1(( ))
+    M1(( ))
+    subgraph Bioremediation Applications
+        nest0_0[Genome Engineering]
+        nest0_1(Ethical Implications)
+    end
+    subgraph Computational Design of Biological Systems
+        nest1_0[Metabolic Pathway Engineering]
+        nest1_1[Novel Enzyme Creation]
+        nest1_2(Regulatory Frameworks)
+        nest1_3(Gene Synthesis Platforms)
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> |yes| N9
+    N9 -.-> N10
+    N10 -.-> |yes| N11
+    N11 --> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 -.-> N16
+    N16 -.-> N17
+    N17 -.-> N18
+    N18 -.-> N19
+    nest0_0 --> nest0_1
+    N14 -.-> nest0_0
+    nest0_1 -.-> N19
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 -.-> nest1_3
+    N16 --> nest1_0
+    nest1_3 --> N7
+    N3 --> S0
+    S0 --> |yes| N14
+    S0 -.-> N10
+    S0 --> N11
+    N16 -.-> S1
+    S1 --> |yes| N19
+    S1 -.-> N18
+    N8 -.-> M1
+    N3 -.-> M1
+    M1 -.-> N12
+    style S0 fill:#C9F0F0,stroke:#4DD0E1
+    style S1 fill:#D1C4E9,stroke:#673AB7
+    style M1 fill:#E8EAF6,stroke:#5C6BC0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#4DD0E1,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_357.txt b/test/mermaid/hard/mermaid_357.txt
new file mode 100644
index 0000000000000000000000000000000000000000..cabce4a294117a03e5be5f099a94a016a15c1c25
--- /dev/null
+++ b/test/mermaid/hard/mermaid_357.txt
@@ -0,0 +1,40 @@
+<Artificial Cells, connectedTo, Gene Therapy Delivery Systems>
+<Automated Biology Workflows, connectedTo, Directed Evolution Automation>
+<Bio_manufacturing, connectedTo, Protein Design>
+<Biosafety Level Management, connectedTo, DNA Storage Technologies>
+<Biosafety Level Management, connectedTo, Genome Engineering>
+<Biosensor Development, yes, Automated Biology Workflows>
+<Cellular Reprogramming, connectedTo, Diagnostic Tool Development>
+<Cellular Reprogramming, connectedTo, High_Throughput Screening>
+<Cellular Reprogramming, connectedTo, Metabolic Pathway Engineering>
+<Cellular Reprogramming, yes, end>
+<DNA Storage Technologies, connectedTo, Cellular Reprogramming>
+<Diagnostic Tool Development, connectedTo, High_Throughput Screening>
+<Directed Evolution, connectedTo, Artificial Cells>
+<Directed Evolution Automation, connectedTo, Risk Assessment>
+<Ethical Implications, connectedTo, end>
+<Ethical Implications, partOf, Bioremediation Applications>
+<Gene Synthesis Platforms, connectedTo, Bio_manufacturing>
+<Gene Synthesis Platforms, partOf, Computational Design of Biological Systems>
+<Gene Therapy Delivery Systems, connectedTo, Bio_manufacturing>
+<Genetic Circuit Design, connectedTo, Synthetic Gene Networks>
+<Genome Engineering, connectedTo, Ethical Implications>
+<Genome Engineering, partOf, Bioremediation Applications>
+<High_Throughput Screening, connectedTo, end>
+<Metabolic Pathway Engineering, connectedTo, Novel Enzyme Creation>
+<Metabolic Pathway Engineering, partOf, Computational Design of Biological Systems>
+<Modular Biology Design, connectedTo, Genetic Circuit Design>
+<Novel Enzyme Creation, connectedTo, Regulatory Frameworks>
+<Novel Enzyme Creation, partOf, Computational Design of Biological Systems>
+<Protein Design, connectedTo, Directed Evolution Automation>
+<Protein Design, yes, Synthetic Organism Design>
+<Regulatory Frameworks, connectedTo, Gene Synthesis Platforms>
+<Regulatory Frameworks, partOf, Computational Design of Biological Systems>
+<Risk Assessment, connectedTo, Biosafety Level Management>
+<Synthetic Gene Networks, connectedTo, Automated Biology Workflows>
+<Synthetic Gene Networks, connectedTo, Biosensor Development>
+<Synthetic Gene Networks, connectedTo, Directed Evolution>
+<Synthetic Gene Networks, connectedTo, Directed Evolution Automation>
+<Synthetic Gene Networks, yes, Biosafety Level Management>
+<Synthetic Organism Design, connectedTo, Biosensor Development>
+<start, connectedTo, Modular Biology Design>
diff --git a/test/mermaid/hard/mermaid_359.mmd b/test/mermaid/hard/mermaid_359.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..ab477185267f14db4361cafdf95ee8f702d99088
--- /dev/null
+++ b/test/mermaid/hard/mermaid_359.mmd
@@ -0,0 +1,140 @@
+graph BT
+    N0([start])
+    N1[Machine Learning for Learning Analytics]
+    N2{Gamified Learning}
+    N3[/Formative Assessment Tools/]
+    N4[(Open Educational Resources)]
+    N5(Personalized Learning Paths)
+    N6[Educational Apps Development]
+    N7(Blockchain for Educational Credentials)
+    N8(Educational Data Mining)
+    N9{Learning Analytics Dashboards}
+    N10([Competency_Based Learning Platforms])
+    N11{Learning Management System Development}
+    N12[/Parent Engagement Tools/]
+    N13[Virtual Labs]
+    N14[[Adaptive Learning Systems]]
+    N15([Massive Open Online Courses])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Online Tutoring Platforms
+        nest0_0[/Cybersecurity for EdTech/]
+        nest0_1(Student Performance Tracking)
+        nest0_2[(Educational Robotics)]
+        nest0_3[(Collaborative Learning Platforms)]
+    end
+    subgraph Simulations for Learning
+        nest1_0[(Data Privacy in Education)]
+        nest1_1[Badging and Certification Systems]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> |tools_provides| N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> |simulates| N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 -.-> N15
+    nest0_0 --> |licenses| nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N8 --> nest0_0
+    nest0_3 -.-> N3
+    nest1_0 -.-> nest1_1
+    N13 -.-> |assesses| nest1_0
+    nest1_1 --> |platforms_builds| N2
+    N5 -.-> S0
+    S0 -.-> N13
+    S0 -.-> N7
+    N5 -.-> S1
+    S1 --> N8
+    S1 -.-> N9
+    N5 -.-> M0
+    N6 -.-> M0
+    M0 --> N12
+    N8 --> M1
+    N3 --> M1
+    N12 --> M1
+    N9 -.-> M1
+    M1 -.-> N14
+    N12 --> |tracks| M2
+    N4 -.-> M2
+    M2 -.-> N14
+    style N0 fill:#FCE4EC,stroke:#E91E63
+    style N1 fill:#F1F8E9,stroke:#388E3C
+    style N2 fill:#F1F8E9,stroke:#388E3C
+    style N3 fill:#FCE4EC,stroke:#E91E63
+    style N4 fill:#FCE4EC,stroke:#E91E63
+    style N5 fill:#FCE4EC,stroke:#E91E63
+    style N6 fill:#FCE4EC,stroke:#E91E63
+    style N7 fill:#F8BBD0,stroke:#E91E63
+    style N8 fill:#FCE4EC,stroke:#E91E63
+    style N9 fill:#F8BBD0,stroke:#E91E63
+    style N10 fill:#FCE4EC,stroke:#E91E63
+    style N11 fill:#FCE4EC,stroke:#E91E63
+    style N12 fill:#FCE4EC,stroke:#E91E63
+    style N13 fill:#FCE4EC,stroke:#E91E63
+    style N14 fill:#F8BBD0,stroke:#E91E63
+    style N15 fill:#F8BBD0,stroke:#E91E63
+    style S0 fill:#F1F8E9,stroke:#388E3C
+    style S1 fill:#F8BBD0,stroke:#E91E63
+    style M0 fill:#F8BBD0,stroke:#E91E63
+    style M1 fill:#F1F8E9,stroke:#388E3C
+    style M2 fill:#F8BBD0,stroke:#E91E63
+    style nest0_0 fill:#FCE4EC,stroke:#E91E63
+    style nest0_1 fill:#FCE4EC,stroke:#E91E63
+    style nest0_2 fill:#F1F8E9,stroke:#388E3C
+    style nest0_3 fill:#F1F8E9,stroke:#388E3C
+    style nest1_0 fill:#F1F8E9,stroke:#388E3C
+    style nest1_1 fill:#F1F8E9,stroke:#388E3C
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#E91E63,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_359.txt b/test/mermaid/hard/mermaid_359.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b20ac216d084f8b799e74a9538ca5223857c9cb4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_359.txt
@@ -0,0 +1,41 @@
+<Adaptive Learning Systems, connectedTo, Massive Open Online Courses>
+<Badging and Certification Systems, partOf, Simulations for Learning>
+<Badging and Certification Systems, platforms_builds, Gamified Learning>
+<Blockchain for Educational Credentials, simulates, Educational Data Mining>
+<Collaborative Learning Platforms, connectedTo, Formative Assessment Tools>
+<Collaborative Learning Platforms, partOf, Online Tutoring Platforms>
+<Competency_Based Learning Platforms, connectedTo, Learning Management System Development>
+<Cybersecurity for EdTech, licenses, Student Performance Tracking>
+<Cybersecurity for EdTech, partOf, Online Tutoring Platforms>
+<Data Privacy in Education, connectedTo, Badging and Certification Systems>
+<Data Privacy in Education, partOf, Simulations for Learning>
+<Educational Apps Development, connectedTo, Blockchain for Educational Credentials>
+<Educational Apps Development, connectedTo, Parent Engagement Tools>
+<Educational Data Mining, connectedTo, Adaptive Learning Systems>
+<Educational Data Mining, connectedTo, Cybersecurity for EdTech>
+<Educational Data Mining, connectedTo, Learning Analytics Dashboards>
+<Educational Robotics, connectedTo, Collaborative Learning Platforms>
+<Educational Robotics, partOf, Online Tutoring Platforms>
+<Formative Assessment Tools, connectedTo, Adaptive Learning Systems>
+<Formative Assessment Tools, connectedTo, Open Educational Resources>
+<Gamified Learning, tools_provides, Formative Assessment Tools>
+<Learning Analytics Dashboards, connectedTo, Adaptive Learning Systems>
+<Learning Analytics Dashboards, connectedTo, Competency_Based Learning Platforms>
+<Learning Management System Development, connectedTo, Parent Engagement Tools>
+<Machine Learning for Learning Analytics, connectedTo, Gamified Learning>
+<Open Educational Resources, connectedTo, Adaptive Learning Systems>
+<Open Educational Resources, connectedTo, Personalized Learning Paths>
+<Parent Engagement Tools, connectedTo, Adaptive Learning Systems>
+<Parent Engagement Tools, connectedTo, Virtual Labs>
+<Parent Engagement Tools, tracks, Adaptive Learning Systems>
+<Personalized Learning Paths, connectedTo, Blockchain for Educational Credentials>
+<Personalized Learning Paths, connectedTo, Educational Apps Development>
+<Personalized Learning Paths, connectedTo, Educational Data Mining>
+<Personalized Learning Paths, connectedTo, Learning Analytics Dashboards>
+<Personalized Learning Paths, connectedTo, Parent Engagement Tools>
+<Personalized Learning Paths, connectedTo, Virtual Labs>
+<Student Performance Tracking, connectedTo, Educational Robotics>
+<Student Performance Tracking, partOf, Online Tutoring Platforms>
+<Virtual Labs, assesses, Data Privacy in Education>
+<Virtual Labs, connectedTo, Adaptive Learning Systems>
+<start, connectedTo, Machine Learning for Learning Analytics>
diff --git a/test/mermaid/hard/mermaid_36.mmd b/test/mermaid/hard/mermaid_36.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..22f1211cffd6f6dcb534ba63b3105f07d05cf847
--- /dev/null
+++ b/test/mermaid/hard/mermaid_36.mmd
@@ -0,0 +1,116 @@
+graph BT
+    N0([start])
+    N1[/Adventure Sports Booking/]
+    N2[Travel Insurance]
+    N3([Historical Site Exploration])
+    N4{Booking Modification}
+    N5[[Currency Exchange]]
+    N6([Tourist Information Desk])
+    N7(Photo Capture)
+    N8[[Local Transport]]
+    N9[(Return Trip)]
+    N10[[Tour Guide Assignment]]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Souvenir Shopping
+        nest0_0[(Trip Sharing)]
+        nest0_1([Cruise Ship Boarding])
+        nest0_2[/Restaurant Reservation/]
+    end
+    subgraph Lost and Found Service
+        nest1_0[/Travel Advisory Updates/]
+        nest1_1{Language Translation Service}
+        nest1_2(Event Reservation)
+        nest1_3[Loyalty Program Enrollment]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N9 -.-> nest0_0
+    nest0_2 --> N5
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> nest1_3
+    N6 -.-> nest1_0
+    nest1_3 -.-> N4
+    N5 --> S0
+    S0 --> N9
+    S0 -.-> |protects| N10
+    N1 -.-> S1
+    S1 -.-> N3
+    S1 --> N8
+    N1 --> M0
+    N0 -.-> M0
+    N2 -.-> M0
+    M0 -.-> N6
+    N7 -.-> M1
+    N4 -.-> |assigns| M1
+    N3 -.-> M1
+    M1 -.-> N10
+    style N0 fill:#FFE0B2,stroke:#FF9800
+    style N1 fill:#FFEBEB,stroke:#FFC2C2
+    style N2 fill:#FFEBEB,stroke:#FFC2C2
+    style N3 fill:#FFE0B2,stroke:#FF9800
+    style N4 fill:#FFE0B2,stroke:#FF9800
+    style N5 fill:#E8EAF6,stroke:#7986CB
+    style N6 fill:#FFE0B2,stroke:#FF9800
+    style N7 fill:#FFEBEB,stroke:#FFC2C2
+    style N8 fill:#FFE0B2,stroke:#FF9800
+    style N9 fill:#FFEBEB,stroke:#FFC2C2
+    style N10 fill:#FFEBEB,stroke:#FFC2C2
+    style S0 fill:#E8EAF6,stroke:#7986CB
+    style S1 fill:#FFE0B2,stroke:#FF9800
+    style M0 fill:#E8EAF6,stroke:#7986CB
+    style M1 fill:#FFEBEB,stroke:#FFC2C2
+    style nest0_0 fill:#E8EAF6,stroke:#7986CB
+    style nest0_1 fill:#E8EAF6,stroke:#7986CB
+    style nest0_2 fill:#E8EAF6,stroke:#7986CB
+    style nest1_0 fill:#E8EAF6,stroke:#7986CB
+    style nest1_1 fill:#FFEBEB,stroke:#FFC2C2
+    style nest1_2 fill:#FFEBEB,stroke:#FFC2C2
+    style nest1_3 fill:#FFEBEB,stroke:#FFC2C2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFC2C2,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FF9800,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_36.txt b/test/mermaid/hard/mermaid_36.txt
new file mode 100644
index 0000000000000000000000000000000000000000..d84342da129b8f5072e5308cf160ec0e60686475
--- /dev/null
+++ b/test/mermaid/hard/mermaid_36.txt
@@ -0,0 +1,36 @@
+<Adventure Sports Booking, connectedTo, Historical Site Exploration>
+<Adventure Sports Booking, connectedTo, Local Transport>
+<Adventure Sports Booking, connectedTo, Tourist Information Desk>
+<Adventure Sports Booking, connectedTo, Travel Insurance>
+<Booking Modification, assigns, Tour Guide Assignment>
+<Booking Modification, connectedTo, Currency Exchange>
+<Cruise Ship Boarding, connectedTo, Restaurant Reservation>
+<Cruise Ship Boarding, partOf, Souvenir Shopping>
+<Currency Exchange, connectedTo, Return Trip>
+<Currency Exchange, connectedTo, Tourist Information Desk>
+<Currency Exchange, protects, Tour Guide Assignment>
+<Event Reservation, connectedTo, Loyalty Program Enrollment>
+<Event Reservation, partOf, Lost and Found Service>
+<Historical Site Exploration, connectedTo, Booking Modification>
+<Historical Site Exploration, connectedTo, Tour Guide Assignment>
+<Language Translation Service, connectedTo, Event Reservation>
+<Language Translation Service, partOf, Lost and Found Service>
+<Local Transport, connectedTo, Return Trip>
+<Loyalty Program Enrollment, connectedTo, Booking Modification>
+<Loyalty Program Enrollment, partOf, Lost and Found Service>
+<Photo Capture, connectedTo, Local Transport>
+<Photo Capture, connectedTo, Tour Guide Assignment>
+<Restaurant Reservation, connectedTo, Currency Exchange>
+<Restaurant Reservation, partOf, Souvenir Shopping>
+<Return Trip, connectedTo, Tour Guide Assignment>
+<Return Trip, connectedTo, Trip Sharing>
+<Tourist Information Desk, connectedTo, Photo Capture>
+<Tourist Information Desk, connectedTo, Travel Advisory Updates>
+<Travel Advisory Updates, connectedTo, Language Translation Service>
+<Travel Advisory Updates, partOf, Lost and Found Service>
+<Travel Insurance, connectedTo, Historical Site Exploration>
+<Travel Insurance, connectedTo, Tourist Information Desk>
+<Trip Sharing, connectedTo, Cruise Ship Boarding>
+<Trip Sharing, partOf, Souvenir Shopping>
+<start, connectedTo, Adventure Sports Booking>
+<start, connectedTo, Tourist Information Desk>
diff --git a/test/mermaid/hard/mermaid_360.txt b/test/mermaid/hard/mermaid_360.txt
new file mode 100644
index 0000000000000000000000000000000000000000..943ec570af8d747a988a0b3d6c10ace2579d683d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_360.txt
@@ -0,0 +1,39 @@
+<Augmented Reality in Education, connectedTo, Digital Textbooks>
+<Badging and Certification Systems, connectedTo, Social_Emotional Learning Tools>
+<Collaborative Learning Platforms, connectedTo, Student Performance Tracking>
+<Collaborative Learning Platforms, connectedTo, Virtual Labs>
+<Competency_Based Learning Platforms, connectedTo, Cybersecurity for EdTech>
+<Cybersecurity for EdTech, connectedTo, Professional Development for Educators>
+<Data Privacy in Education, connectedTo, Interactive Content Creation>
+<Data Privacy in Education, partOf, Learning Analytics Dashboards>
+<Digital Textbooks, connectedTo, Data Privacy in Education>
+<Digital Textbooks, connectedTo, Virtual Reality in Education>
+<EdTech Hardware Solutions, connectedTo, Open Educational Resources>
+<EdTech Hardware Solutions, partOf, Learning Analytics Dashboards>
+<Educational Data Mining, connectedTo, Badging and Certification Systems>
+<Educational Robotics, integrates, Remote Learning Solutions>
+<Formative Assessment Tools, connectedTo, Virtual Labs>
+<Formative Assessment Tools, partOf, Adaptive Learning Systems>
+<Gamified Learning, teachers_trains, Learning Management System Development>
+<Interactive Content Creation, connectedTo, EdTech Hardware Solutions>
+<Interactive Content Creation, partOf, Learning Analytics Dashboards>
+<Learning Management System Development, connectedTo, Professional Development for Educators>
+<Learning Management System Development, markets, Remote Learning Solutions>
+<Learning Management System Development, researches, Educational Data Mining>
+<Machine Learning for Learning Analytics, content_generates, Personalized Learning Paths>
+<Massive Open Online Courses, connectedTo, Gamified Learning>
+<Open Educational Resources, connectedTo, Digital Textbooks>
+<Open Educational Resources, partOf, Learning Analytics Dashboards>
+<Professional Development for Educators, assesses, Collaborative Learning Platforms>
+<Remote Learning Solutions, connectedTo, Augmented Reality in Education>
+<Social_Emotional Learning Tools, connectedTo, Educational Robotics>
+<Student Performance Tracking, connectedTo, Formative Assessment Tools>
+<Student Performance Tracking, connectedTo, start>
+<Student Performance Tracking, partOf, Adaptive Learning Systems>
+<Virtual Labs, connectedTo, Massive Open Online Courses>
+<Virtual Labs, tracks, Remote Learning Solutions>
+<Virtual Reality in Education, connectedTo, Machine Learning for Learning Analytics>
+<start, connectedTo, Augmented Reality in Education>
+<start, connectedTo, Competency_Based Learning Platforms>
+<start, connectedTo, Cybersecurity for EdTech>
+<start, connectedTo, Remote Learning Solutions>
diff --git a/test/mermaid/hard/mermaid_37.mmd b/test/mermaid/hard/mermaid_37.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..e53fba9d63884b1203d39c972bac9fb8d2fbcbfa
--- /dev/null
+++ b/test/mermaid/hard/mermaid_37.mmd
@@ -0,0 +1,93 @@
+graph RL
+    N0([start])
+    N1[(Property Marketing)]
+    N2[/Agent Assignment/]
+    N3[Loan Pre_Approval]
+    N4(Mortgage Application Assistance)
+    N5{Zoning Compliance}
+    N6[Contract Review]
+    N7[[Property Tax Payment]]
+    N8(Property Insurance)
+    N9(Property Valuation)
+    N10[Rental Agreement]
+    S0(( ))
+    S1(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Market Trend Analysis
+        nest0_0[Lease Renewal]
+        nest0_1(Commercial Lease Negotiation)
+        nest0_2[(Building Permit Application)]
+    end
+    subgraph Closing Meeting
+        nest1_0([Price Negotiation])
+        nest1_1(Eviction Process)
+        nest1_2[(Tenant Screening)]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> |yes| N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N3 --> nest0_0
+    nest0_2 -.-> N8
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N2 --> nest1_0
+    nest1_2 --> N7
+    N7 -.-> S0
+    S0 -.-> N9
+    S0 -.-> N10
+    N2 --> S1
+    S1 --> N6
+    S1 --> N7
+    N1 -.-> M1
+    N0 -.-> M1
+    N2 -.-> M1
+    M1 -.-> N7
+    N0 --> |no| M2
+    N1 --> M2
+    M2 --> N3
+    style S0 fill:#FFF9D4,stroke:#FFE69C
+    style S1 fill:#F1F8FF,stroke:#42A5F5
+    style M1 fill:#F1F8FF,stroke:#42A5F5
+    style M2 fill:#FFF9D4,stroke:#FFE69C
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFE69C,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_37.txt b/test/mermaid/hard/mermaid_37.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ad9d2a30244042c82a62f2e8b0f6df50eb3e6d48
--- /dev/null
+++ b/test/mermaid/hard/mermaid_37.txt
@@ -0,0 +1,32 @@
+<Agent Assignment, connectedTo, Contract Review>
+<Agent Assignment, connectedTo, Loan Pre_Approval>
+<Agent Assignment, connectedTo, Price Negotiation>
+<Agent Assignment, connectedTo, Property Tax Payment>
+<Building Permit Application, connectedTo, Property Insurance>
+<Building Permit Application, partOf, Market Trend Analysis>
+<Commercial Lease Negotiation, connectedTo, Building Permit Application>
+<Commercial Lease Negotiation, partOf, Market Trend Analysis>
+<Contract Review, yes, Property Tax Payment>
+<Eviction Process, connectedTo, Tenant Screening>
+<Eviction Process, partOf, Closing Meeting>
+<Lease Renewal, connectedTo, Commercial Lease Negotiation>
+<Lease Renewal, partOf, Market Trend Analysis>
+<Loan Pre_Approval, connectedTo, Lease Renewal>
+<Loan Pre_Approval, connectedTo, Mortgage Application Assistance>
+<Mortgage Application Assistance, connectedTo, Zoning Compliance>
+<Price Negotiation, connectedTo, Eviction Process>
+<Price Negotiation, partOf, Closing Meeting>
+<Property Insurance, connectedTo, Property Valuation>
+<Property Marketing, connectedTo, Agent Assignment>
+<Property Marketing, connectedTo, Loan Pre_Approval>
+<Property Marketing, connectedTo, Property Tax Payment>
+<Property Tax Payment, connectedTo, Property Insurance>
+<Property Tax Payment, connectedTo, Property Valuation>
+<Property Tax Payment, connectedTo, Rental Agreement>
+<Property Valuation, connectedTo, Rental Agreement>
+<Tenant Screening, connectedTo, Property Tax Payment>
+<Tenant Screening, partOf, Closing Meeting>
+<Zoning Compliance, connectedTo, Contract Review>
+<start, connectedTo, Property Marketing>
+<start, connectedTo, Property Tax Payment>
+<start, no, Loan Pre_Approval>
diff --git a/test/mermaid/hard/mermaid_38.mmd b/test/mermaid/hard/mermaid_38.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..0d043cefdce4ded55224444928ef33f6e3a69c6a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_38.mmd
@@ -0,0 +1,158 @@
+graph TD
+    N0([start])
+    N1{Open House Event}
+    N2[Price Negotiation]
+    N3{Renovation Planning}
+    N4[[Lease Renewal]]
+    N5{Property Management}
+    N6{Building Permit Application}
+    N7{Document Signing}
+    N8[/Zoning Compliance/]
+    N9[Buyer Inquiry]
+    N10(Investment Property Analysis)
+    N11([Property Tax Payment])
+    N12(Property Marketing)
+    N13[Tenant Screening]
+    N14(Maintenance Request)
+    N15[Land Acquisition]
+    N16(Title Check)
+    N17[/Property Listing/]
+    N18(Property Insurance)
+    N19([Market Trend Analysis])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Closing Meeting
+        nest0_0[(Mortgage Application Assistance)]
+        nest0_1[Agent Assignment]
+    end
+    subgraph HOA Management
+        nest1_0[/Contract Review/]
+        nest1_1[/Property Valuation/]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    N15 -.-> N16
+    N16 --> N17
+    N17 -.-> N18
+    N18 -.-> |lists| N19
+    nest0_0 --> nest0_1
+    N4 --> nest0_0
+    nest0_1 --> N4
+    nest1_0 --> nest1_1
+    N10 --> nest1_0
+    nest1_1 -.-> N1
+    N15 --> S0
+    S0 -.-> N17
+    S0 --> N19
+    S0 -.-> N18
+    N2 -.-> S1
+    S1 --> N18
+    S1 -.-> N9
+    S1 --> N14
+    N1 --> S2
+    S2 -.-> N7
+    S2 -.-> N12
+    N7 --> M0
+    N5 --> M0
+    M0 -.-> N17
+    N0 --> M1
+    N1 --> M1
+    N2 -.-> M1
+    M1 --> N4
+    N16 -.-> M2
+    N11 -.-> M2
+    M2 --> N18
+    style N0 fill:#D0EFEE,stroke:#73C6BC
+    style N1 fill:#ECEFF1,stroke:#90A4AE
+    style N2 fill:#ECEFF1,stroke:#90A4AE
+    style N3 fill:#D0EFEE,stroke:#73C6BC
+    style N4 fill:#C2E8E6,stroke:#61CAC3
+    style N5 fill:#C2E8E6,stroke:#61CAC3
+    style N6 fill:#ECEFF1,stroke:#90A4AE
+    style N7 fill:#C2E8E6,stroke:#61CAC3
+    style N8 fill:#C2E8E6,stroke:#61CAC3
+    style N9 fill:#ECEFF1,stroke:#90A4AE
+    style N10 fill:#D0EFEE,stroke:#73C6BC
+    style N11 fill:#C2E8E6,stroke:#61CAC3
+    style N12 fill:#D0EFEE,stroke:#73C6BC
+    style N13 fill:#D0EFEE,stroke:#73C6BC
+    style N14 fill:#D0EFEE,stroke:#73C6BC
+    style N15 fill:#C2E8E6,stroke:#61CAC3
+    style N16 fill:#ECEFF1,stroke:#90A4AE
+    style N17 fill:#C2E8E6,stroke:#61CAC3
+    style N18 fill:#ECEFF1,stroke:#90A4AE
+    style N19 fill:#ECEFF1,stroke:#90A4AE
+    style S0 fill:#ECEFF1,stroke:#90A4AE
+    style S1 fill:#D0EFEE,stroke:#73C6BC
+    style S2 fill:#ECEFF1,stroke:#90A4AE
+    style M0 fill:#C2E8E6,stroke:#61CAC3
+    style M1 fill:#C2E8E6,stroke:#61CAC3
+    style M2 fill:#D0EFEE,stroke:#73C6BC
+    style nest0_0 fill:#D0EFEE,stroke:#73C6BC
+    style nest0_1 fill:#C2E8E6,stroke:#61CAC3
+    style nest1_0 fill:#D0EFEE,stroke:#73C6BC
+    style nest1_1 fill:#ECEFF1,stroke:#90A4AE
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 44 stroke:#61CAC3,stroke-width:2px,fill:none;
+    linkStyle 45 stroke:#73C6BC,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_38.txt b/test/mermaid/hard/mermaid_38.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0039e3560724336e7e1c025bac9af665f827d196
--- /dev/null
+++ b/test/mermaid/hard/mermaid_38.txt
@@ -0,0 +1,44 @@
+<Agent Assignment, connectedTo, Lease Renewal>
+<Agent Assignment, partOf, Closing Meeting>
+<Building Permit Application, connectedTo, Document Signing>
+<Buyer Inquiry, connectedTo, Investment Property Analysis>
+<Contract Review, connectedTo, Property Valuation>
+<Contract Review, partOf, HOA Management>
+<Document Signing, connectedTo, Property Listing>
+<Document Signing, connectedTo, Zoning Compliance>
+<Investment Property Analysis, connectedTo, Contract Review>
+<Investment Property Analysis, connectedTo, Property Tax Payment>
+<Land Acquisition, connectedTo, Market Trend Analysis>
+<Land Acquisition, connectedTo, Property Insurance>
+<Land Acquisition, connectedTo, Property Listing>
+<Land Acquisition, connectedTo, Title Check>
+<Lease Renewal, connectedTo, Mortgage Application Assistance>
+<Lease Renewal, connectedTo, Property Management>
+<Maintenance Request, connectedTo, Land Acquisition>
+<Mortgage Application Assistance, connectedTo, Agent Assignment>
+<Mortgage Application Assistance, partOf, Closing Meeting>
+<Open House Event, connectedTo, Document Signing>
+<Open House Event, connectedTo, Lease Renewal>
+<Open House Event, connectedTo, Price Negotiation>
+<Open House Event, connectedTo, Property Marketing>
+<Price Negotiation, connectedTo, Buyer Inquiry>
+<Price Negotiation, connectedTo, Lease Renewal>
+<Price Negotiation, connectedTo, Maintenance Request>
+<Price Negotiation, connectedTo, Property Insurance>
+<Price Negotiation, connectedTo, Renovation Planning>
+<Property Insurance, lists, Market Trend Analysis>
+<Property Listing, connectedTo, Property Insurance>
+<Property Management, connectedTo, Building Permit Application>
+<Property Management, connectedTo, Property Listing>
+<Property Marketing, connectedTo, Tenant Screening>
+<Property Tax Payment, connectedTo, Property Insurance>
+<Property Tax Payment, connectedTo, Property Marketing>
+<Property Valuation, connectedTo, Open House Event>
+<Property Valuation, partOf, HOA Management>
+<Renovation Planning, connectedTo, Lease Renewal>
+<Tenant Screening, connectedTo, Maintenance Request>
+<Title Check, connectedTo, Property Insurance>
+<Title Check, connectedTo, Property Listing>
+<Zoning Compliance, connectedTo, Buyer Inquiry>
+<start, connectedTo, Lease Renewal>
+<start, connectedTo, Open House Event>
diff --git a/test/mermaid/hard/mermaid_39.mmd b/test/mermaid/hard/mermaid_39.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..461def3c850070b0420cbd9639020d38e4685960
--- /dev/null
+++ b/test/mermaid/hard/mermaid_39.mmd
@@ -0,0 +1,140 @@
+graph BT
+    N0([start])
+    N1[[Agent Assignment]]
+    N2[(Building Permit Application)]
+    N3[Loan Pre_Approval]
+    N4[(Escrow Setup)]
+    N5[Rental Agreement]
+    N6[Property Listing]
+    N7([Commission Distribution])
+    N8[(Zoning Compliance)]
+    N9([Property Valuation])
+    N10[Closing Meeting]
+    N11([Site Visit Scheduling])
+    N12[(Land Acquisition)]
+    N13{Buyer Inquiry}
+    N14[(Virtual Tour Creation)]
+    N15[/Investment Property Analysis/]
+    N16(Legal Verification)
+    N17(Renovation Planning)
+    N18([Tax Assessment])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Title Check
+        nest0_0[(Home Inspection)]
+        nest0_1([Property Marketing])
+        nest0_2([HOA Management])
+    end
+    subgraph Mortgage Application Assistance
+        nest1_0([Property Insurance])
+        nest1_1[(Brokerage License Renewal)]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    N15 -.-> N16
+    N16 -.-> N17
+    N17 -.-> N18
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    N4 --> nest0_0
+    nest0_2 -.-> N17
+    nest1_0 --> nest1_1
+    N7 --> nest1_0
+    nest1_1 --> N5
+    N7 --> S0
+    S0 --> N10
+    S0 -.-> N13
+    N14 --> S1
+    S1 -.-> N16
+    S1 -.-> N17
+    S1 -.-> N18
+    N0 --> M0
+    N8 -.-> M0
+    N9 -.-> M0
+    M0 -.-> N16
+    N1 --> M1
+    N10 --> M1
+    M1 -.-> N15
+    style N0 fill:#FAEBF3,stroke:#F7BEE0
+    style N1 fill:#DED7F0,stroke:#A188DB
+    style N2 fill:#DED7F0,stroke:#A188DB
+    style N3 fill:#DED7F0,stroke:#A188DB
+    style N4 fill:#FAEBF3,stroke:#F7BEE0
+    style N5 fill:#DED7F0,stroke:#A188DB
+    style N6 fill:#DED7F0,stroke:#A188DB
+    style N7 fill:#FAEBF3,stroke:#F7BEE0
+    style N8 fill:#DED7F0,stroke:#A188DB
+    style N9 fill:#DED7F0,stroke:#A188DB
+    style N10 fill:#E8EAF6,stroke:#5C6BC0
+    style N11 fill:#E8EAF6,stroke:#5C6BC0
+    style N12 fill:#E8EAF6,stroke:#5C6BC0
+    style N13 fill:#FAEBF3,stroke:#F7BEE0
+    style N14 fill:#DED7F0,stroke:#A188DB
+    style N15 fill:#DED7F0,stroke:#A188DB
+    style N16 fill:#E8EAF6,stroke:#5C6BC0
+    style N17 fill:#E8EAF6,stroke:#5C6BC0
+    style N18 fill:#DED7F0,stroke:#A188DB
+    style S0 fill:#DED7F0,stroke:#A188DB
+    style S1 fill:#FAEBF3,stroke:#F7BEE0
+    style M0 fill:#E8EAF6,stroke:#5C6BC0
+    style M1 fill:#FAEBF3,stroke:#F7BEE0
+    style nest0_0 fill:#FAEBF3,stroke:#F7BEE0
+    style nest0_1 fill:#FAEBF3,stroke:#F7BEE0
+    style nest0_2 fill:#DED7F0,stroke:#A188DB
+    style nest1_0 fill:#DED7F0,stroke:#A188DB
+    style nest1_1 fill:#E8EAF6,stroke:#5C6BC0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#A188DB,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_4.mmd b/test/mermaid/hard/mermaid_4.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..072c71d89de7634192ad53381fe167546aaebe1b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_4.mmd
@@ -0,0 +1,124 @@
+graph BT
+    N0([start])
+    N1{Wound Care}
+    N2[Pharmacy Order]
+    N3[[Telemedicine Consultation]]
+    N4(Emergency Response)
+    N5[Lab Test]
+    N6([Device Implantation])
+    N7(Referral)
+    N8[Triage]
+    N9{Blood Test}
+    N10(Surgery)
+    N11[Patient Transfer]
+    N12[(Nutritional Counseling)]
+    N13[(Insurance Claim)]
+    S0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Medical History
+        nest0_0[(Medical Record Keeping)]
+        nest0_1[Physical Examination]
+        nest0_2(Symptom Monitoring)
+        nest0_3(Diagnosis)
+    end
+    subgraph Case Review
+        nest1_0[/Imaging Scan/]
+        nest1_1(Biopsy)
+        nest1_2[Health Screening]
+        nest1_3{Mental Health Assessment}
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 --> N13
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N1 --> nest0_0
+    nest0_3 --> N1
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N8 --> nest1_0
+    nest1_3 -.-> N9
+    N4 -.-> S0
+    S0 -.-> N13
+    S0 --> N6
+    S0 -.-> N7
+    N3 --> M1
+    N4 -.-> M1
+    M1 -.-> N8
+    N7 -.-> M2
+    N5 -.-> |counsels| M2
+    M2 --> N11
+    N8 --> nest0_1
+    style N0 fill:#E8EAF6,stroke:#7986CB
+    style N1 fill:#E8EAF6,stroke:#7986CB
+    style N2 fill:#F3E5F5,stroke:#AB47BC
+    style N3 fill:#F3E5F5,stroke:#AB47BC
+    style N4 fill:#F3E5F5,stroke:#AB47BC
+    style N5 fill:#FCE4EC,stroke:#F06292
+    style N6 fill:#E8EAF6,stroke:#7986CB
+    style N7 fill:#F3E5F5,stroke:#AB47BC
+    style N8 fill:#FCE4EC,stroke:#F06292
+    style N9 fill:#FCE4EC,stroke:#F06292
+    style N10 fill:#E8EAF6,stroke:#7986CB
+    style N11 fill:#E8EAF6,stroke:#7986CB
+    style N12 fill:#F3E5F5,stroke:#AB47BC
+    style N13 fill:#FCE4EC,stroke:#F06292
+    style S0 fill:#F3E5F5,stroke:#AB47BC
+    style M1 fill:#FCE4EC,stroke:#F06292
+    style M2 fill:#F3E5F5,stroke:#AB47BC
+    style nest0_0 fill:#F3E5F5,stroke:#AB47BC
+    style nest0_1 fill:#E8EAF6,stroke:#7986CB
+    style nest0_2 fill:#E8EAF6,stroke:#7986CB
+    style nest0_3 fill:#FCE4EC,stroke:#F06292
+    style nest1_0 fill:#F3E5F5,stroke:#AB47BC
+    style nest1_1 fill:#F3E5F5,stroke:#AB47BC
+    style nest1_2 fill:#FCE4EC,stroke:#F06292
+    style nest1_3 fill:#FCE4EC,stroke:#F06292
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#F06292,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#7986CB,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_4.txt b/test/mermaid/hard/mermaid_4.txt
new file mode 100644
index 0000000000000000000000000000000000000000..818fa869e896dd1d25238788e71cff2d584d6f91
--- /dev/null
+++ b/test/mermaid/hard/mermaid_4.txt
@@ -0,0 +1,39 @@
+<Biopsy, connectedTo, Health Screening>
+<Biopsy, partOf, Case Review>
+<Blood Test, connectedTo, Surgery>
+<Device Implantation, connectedTo, Referral>
+<Diagnosis, connectedTo, Wound Care>
+<Diagnosis, partOf, Medical History>
+<Emergency Response, connectedTo, Device Implantation>
+<Emergency Response, connectedTo, Insurance Claim>
+<Emergency Response, connectedTo, Lab Test>
+<Emergency Response, connectedTo, Referral>
+<Emergency Response, connectedTo, Triage>
+<Health Screening, connectedTo, Mental Health Assessment>
+<Health Screening, partOf, Case Review>
+<Imaging Scan, connectedTo, Biopsy>
+<Imaging Scan, partOf, Case Review>
+<Lab Test, connectedTo, Device Implantation>
+<Lab Test, counsels, Patient Transfer>
+<Medical Record Keeping, connectedTo, Physical Examination>
+<Medical Record Keeping, partOf, Medical History>
+<Mental Health Assessment, connectedTo, Blood Test>
+<Mental Health Assessment, partOf, Case Review>
+<Nutritional Counseling, connectedTo, Insurance Claim>
+<Patient Transfer, connectedTo, Nutritional Counseling>
+<Pharmacy Order, connectedTo, Telemedicine Consultation>
+<Physical Examination, connectedTo, Symptom Monitoring>
+<Physical Examination, partOf, Medical History>
+<Referral, connectedTo, Patient Transfer>
+<Referral, connectedTo, Triage>
+<Surgery, connectedTo, Patient Transfer>
+<Symptom Monitoring, connectedTo, Diagnosis>
+<Symptom Monitoring, partOf, Medical History>
+<Telemedicine Consultation, connectedTo, Emergency Response>
+<Telemedicine Consultation, connectedTo, Triage>
+<Triage, connectedTo, Blood Test>
+<Triage, connectedTo, Imaging Scan>
+<Triage, connectedTo, Physical Examination>
+<Wound Care, connectedTo, Medical Record Keeping>
+<Wound Care, connectedTo, Pharmacy Order>
+<start, connectedTo, Wound Care>
diff --git a/test/mermaid/hard/mermaid_40.mmd b/test/mermaid/hard/mermaid_40.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..35e41c84c55d9ffeef67ca754e98247fd435e8d4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_40.mmd
@@ -0,0 +1,134 @@
+graph TD
+    N0([start])
+    N1{Public Safety Training}
+    N2[[Crime Prevention Programs]]
+    N3(Cybersecurity Threat Response)
+    N4[Search and Rescue Operations]
+    N5[Surveillance Review]
+    N6{Emergency Medical Service}
+    N7[Incident Reporting]
+    N8[/Disaster Relief Coordination/]
+    N9[(Rescue Coordination)]
+    N10[Responder Alert]
+    N11[/Shelter Setup/]
+    N12[/Evidence Collection/]
+    N13[[Court Testimony]]
+    N14[(Incident Command System Activation)]
+    N15(Threat Assessment)
+    N16([Evacuation Planning])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    subgraph Law Enforcement Database Check
+        nest0_0[[Emergency Dispatch]]
+        nest0_1([K9 Unit Deployment])
+        nest0_2[[Public Warning]]
+        nest0_3[Hostage Negotiation]
+    end
+    subgraph Crowd Management
+        nest1_0[/Post_Incident Review/]
+        nest1_1(Drug Interdiction)
+        nest1_2([Resource Allocation])
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 --> |debriefs| N14
+    N14 --> N15
+    N15 --> N16
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N12 --> nest0_0
+    nest0_3 --> N5
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N4 --> nest1_0
+    nest1_2 --> N5
+    N11 --> S0
+    S0 --> N13
+    S0 -.-> N14
+    S0 --> N16
+    N6 -.-> S1
+    S1 -.-> N13
+    S1 -.-> N14
+    S1 --> N16
+    S1 -.-> N10
+    N8 -.-> S2
+    S2 -.-> N16
+    S2 --> N10
+    style N0 fill:#FFFCE6,stroke:#FFF9AE
+    style N1 fill:#FFFCE6,stroke:#FFF9AE
+    style N2 fill:#FFFCE6,stroke:#FFF9AE
+    style N3 fill:#E9F7E8,stroke:#6EB76D
+    style N4 fill:#F1F8FF,stroke:#42A5F5
+    style N5 fill:#F1F8FF,stroke:#42A5F5
+    style N6 fill:#FFFCE6,stroke:#FFF9AE
+    style N7 fill:#E9F7E8,stroke:#6EB76D
+    style N8 fill:#E9F7E8,stroke:#6EB76D
+    style N9 fill:#E9F7E8,stroke:#6EB76D
+    style N10 fill:#E9F7E8,stroke:#6EB76D
+    style N11 fill:#E9F7E8,stroke:#6EB76D
+    style N12 fill:#E9F7E8,stroke:#6EB76D
+    style N13 fill:#E9F7E8,stroke:#6EB76D
+    style N14 fill:#E9F7E8,stroke:#6EB76D
+    style N15 fill:#E9F7E8,stroke:#6EB76D
+    style N16 fill:#FFFCE6,stroke:#FFF9AE
+    style S0 fill:#E9F7E8,stroke:#6EB76D
+    style S1 fill:#E9F7E8,stroke:#6EB76D
+    style S2 fill:#E9F7E8,stroke:#6EB76D
+    style nest0_0 fill:#F1F8FF,stroke:#42A5F5
+    style nest0_1 fill:#F1F8FF,stroke:#42A5F5
+    style nest0_2 fill:#FFFCE6,stroke:#FFF9AE
+    style nest0_3 fill:#F1F8FF,stroke:#42A5F5
+    style nest1_0 fill:#E9F7E8,stroke:#6EB76D
+    style nest1_1 fill:#F1F8FF,stroke:#42A5F5
+    style nest1_2 fill:#FFFCE6,stroke:#FFF9AE
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFF9AE,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#6EB76D,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#42A5F5,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_40.txt b/test/mermaid/hard/mermaid_40.txt
new file mode 100644
index 0000000000000000000000000000000000000000..acfefc8d76cbecf0bd72e8d865ec1e6ed8fe2850
--- /dev/null
+++ b/test/mermaid/hard/mermaid_40.txt
@@ -0,0 +1,41 @@
+<Court Testimony, debriefs, Incident Command System Activation>
+<Crime Prevention Programs, connectedTo, Cybersecurity Threat Response>
+<Cybersecurity Threat Response, connectedTo, Search and Rescue Operations>
+<Disaster Relief Coordination, connectedTo, Evacuation Planning>
+<Disaster Relief Coordination, connectedTo, Rescue Coordination>
+<Disaster Relief Coordination, connectedTo, Responder Alert>
+<Drug Interdiction, connectedTo, Resource Allocation>
+<Drug Interdiction, partOf, Crowd Management>
+<Emergency Dispatch, connectedTo, K9 Unit Deployment>
+<Emergency Dispatch, partOf, Law Enforcement Database Check>
+<Emergency Medical Service, connectedTo, Court Testimony>
+<Emergency Medical Service, connectedTo, Evacuation Planning>
+<Emergency Medical Service, connectedTo, Incident Command System Activation>
+<Emergency Medical Service, connectedTo, Incident Reporting>
+<Emergency Medical Service, connectedTo, Responder Alert>
+<Evidence Collection, connectedTo, Court Testimony>
+<Evidence Collection, connectedTo, Emergency Dispatch>
+<Hostage Negotiation, connectedTo, Surveillance Review>
+<Hostage Negotiation, partOf, Law Enforcement Database Check>
+<Incident Command System Activation, connectedTo, Threat Assessment>
+<Incident Reporting, connectedTo, Disaster Relief Coordination>
+<K9 Unit Deployment, connectedTo, Public Warning>
+<K9 Unit Deployment, partOf, Law Enforcement Database Check>
+<Post_Incident Review, connectedTo, Drug Interdiction>
+<Post_Incident Review, partOf, Crowd Management>
+<Public Safety Training, connectedTo, Crime Prevention Programs>
+<Public Warning, connectedTo, Hostage Negotiation>
+<Public Warning, partOf, Law Enforcement Database Check>
+<Rescue Coordination, connectedTo, Responder Alert>
+<Resource Allocation, connectedTo, Surveillance Review>
+<Resource Allocation, partOf, Crowd Management>
+<Responder Alert, connectedTo, Shelter Setup>
+<Search and Rescue Operations, connectedTo, Post_Incident Review>
+<Search and Rescue Operations, connectedTo, Surveillance Review>
+<Shelter Setup, connectedTo, Court Testimony>
+<Shelter Setup, connectedTo, Evacuation Planning>
+<Shelter Setup, connectedTo, Evidence Collection>
+<Shelter Setup, connectedTo, Incident Command System Activation>
+<Surveillance Review, connectedTo, Emergency Medical Service>
+<Threat Assessment, connectedTo, Evacuation Planning>
+<start, connectedTo, Public Safety Training>
diff --git a/test/mermaid/hard/mermaid_41.txt b/test/mermaid/hard/mermaid_41.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7108e26aeb373fdecedb793342a78ee24954d53c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_41.txt
@@ -0,0 +1,40 @@
+<Border Security, connectedTo, Hostage Negotiation>
+<Border Security, connectedTo, Threat Assessment>
+<Crime Prevention Programs, connectedTo, Witness Interview>
+<Crime Scene Analysis, connectedTo, Public Safety Training>
+<Crime Scene Analysis, connectedTo, SWAT Team Activation>
+<Emergency Dispatch, connectedTo, Victim Support Services>
+<Emergency Dispatch, partOf, Incident Command System Activation>
+<Emergency Medical Service, connectedTo, Border Security>
+<Emergency Medical Service, connectedTo, Hostage Negotiation>
+<Emergency Medical Service, connectedTo, SWAT Team Activation>
+<Emergency Medical Service, connectedTo, Threat Assessment>
+<Emergency Medical Service, yes, Crime Scene Analysis>
+<Evacuation Planning, connectedTo, Threat Assessment>
+<Evacuation Planning, partOf, Cybersecurity Threat Response>
+<Hostage Negotiation, connectedTo, SWAT Team Activation>
+<Hostage Negotiation, connectedTo, Witness Interview>
+<Hostage Negotiation, no, Crime Prevention Programs>
+<Hostage Negotiation, no, Crime Scene Analysis>
+<Incident Reporting, connectedTo, Emergency Medical Service>
+<Incident Reporting, connectedTo, Witness Interview>
+<K9 Unit Deployment, connectedTo, Incident Reporting>
+<K9 Unit Deployment, connectedTo, Threat Assessment>
+<K9 Unit Deployment, connectedTo, Witness Interview>
+<Patrol Scheduling, connectedTo, K9 Unit Deployment>
+<Patrol Scheduling, partOf, Incident Command System Activation>
+<Post_Incident Review, connectedTo, Evacuation Planning>
+<Post_Incident Review, partOf, Cybersecurity Threat Response>
+<Public Safety Training, partOf, Incident Command System Activation>
+<Public Safety Training, yes, Emergency Dispatch>
+<SWAT Team Activation, connectedTo, Suspect Identification>
+<SWAT Team Activation, connectedTo, Threat Assessment>
+<Suspect Identification, connectedTo, Post_Incident Review>
+<Suspect Identification, partOf, Cybersecurity Threat Response>
+<Threat Assessment, connectedTo, Crime Prevention Programs>
+<Threat Assessment, connectedTo, Witness Interview>
+<Traffic Control, connectedTo, K9 Unit Deployment>
+<Traffic Control, connectedTo, Threat Assessment>
+<Victim Support Services, connectedTo, Patrol Scheduling>
+<Victim Support Services, partOf, Incident Command System Activation>
+<start, connectedTo, Traffic Control>
diff --git a/test/mermaid/hard/mermaid_42.txt b/test/mermaid/hard/mermaid_42.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e0179652c060447ee0f5a27f3eca453c1c86d1a5
--- /dev/null
+++ b/test/mermaid/hard/mermaid_42.txt
@@ -0,0 +1,44 @@
+<Bomb Disposal, connectedTo, Resource Allocation>
+<Community Outreach, connectedTo, Court Testimony>
+<Community Outreach, monitors, Bomb Disposal>
+<Court Testimony, connectedTo, Inmate Transport>
+<Crowd Management, connectedTo, Traffic Control>
+<Crowd Management, connectedTo, Victim Support Services>
+<Cybersecurity Threat Response, connectedTo, Bomb Disposal>
+<Cybersecurity Threat Response, connectedTo, Public Safety Training>
+<Disaster Relief Coordination, connectedTo, Search and Rescue Operations>
+<Disaster Relief Coordination, partOf, Drug Interdiction>
+<Emergency Dispatch, connectedTo, Evidence Collection>
+<Evidence Collection, connectedTo, Crowd Management>
+<Fire Suppression, connectedTo, Hostage Negotiation>
+<First Aid Deployment, connectedTo, Cybersecurity Threat Response>
+<Hostage Negotiation, connectedTo, Law Enforcement Database Check>
+<Incident Reporting, connectedTo, SWAT Team Activation>
+<Inmate Transport, connectedTo, Rescue Coordination>
+<K9 Unit Deployment, connectedTo, Court Testimony>
+<K9 Unit Deployment, partOf, Forensic Analysis>
+<Law Enforcement Database Check, connectedTo, Bomb Disposal>
+<Post_Incident Review, connectedTo, Fire Suppression>
+<Post_Incident Review, partOf, Drug Interdiction>
+<Public Safety Training, connectedTo, Fire Suppression>
+<Public Safety Training, connectedTo, Incident Reporting>
+<Public Safety Training, connectedTo, Law Enforcement Database Check>
+<Public Safety Training, connectedTo, Victim Support Services>
+<Public Safety Training, suppresses, Bomb Disposal>
+<Rescue Coordination, analyzes, Surveillance Review>
+<Rescue Coordination, connectedTo, First Aid Deployment>
+<Resource Allocation, connectedTo, Emergency Dispatch>
+<SWAT Team Activation, connectedTo, Bomb Disposal>
+<SWAT Team Activation, connectedTo, Fire Suppression>
+<Search and Rescue Operations, connectedTo, Post_Incident Review>
+<Search and Rescue Operations, partOf, Drug Interdiction>
+<Surveillance Review, connectedTo, K9 Unit Deployment>
+<Surveillance Review, partOf, Forensic Analysis>
+<Traffic Control, connectedTo, Disaster Relief Coordination>
+<Traffic Control, partOf, Drug Interdiction>
+<Victim Support Services, connectedTo, Shelter Setup>
+<start, connectedTo, Crowd Management>
+<start, connectedTo, Evidence Collection>
+<start, connectedTo, Hostage Negotiation>
+<start, coordinates, Community Outreach>
+<start, licenses, Shelter Setup>
diff --git a/test/mermaid/hard/mermaid_43.mmd b/test/mermaid/hard/mermaid_43.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..d998a58b57567e902fc05c3f7952607eafa1d760
--- /dev/null
+++ b/test/mermaid/hard/mermaid_43.mmd
@@ -0,0 +1,152 @@
+graph RL
+    N0([start])
+    N1{Press Junket}
+    N2(Game Development)
+    N3{Talent Management}
+    N4(Budget Planning)
+    N5[[Sound Engineering]]
+    N6([Film Festival Submission])
+    N7[/Costume Design/]
+    N8[/Broadcast Scheduling/]
+    N9(Live Performance)
+    N10[Script Writing]
+    N11[(Trailer Production)]
+    N12{Marketing Campaign}
+    N13[Editing Process]
+    N14[(Premiere Event)]
+    N15(Footage Review)
+    N16([Location Scouting])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Film Distribution
+        nest0_0[(Animation Production)]
+        nest0_1[Set Construction]
+        nest0_2[[Special Effects Design]]
+    end
+    subgraph Visual Effects
+        nest1_0[Audience Feedback]
+        nest1_1[/Lighting Setup/]
+        nest1_2[(Actor Rehearsal)]
+        nest1_3[Ticketing Sales]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    N15 --> N16
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    N6 --> nest0_0
+    nest0_2 --> N5
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> nest1_3
+    N3 --> nest1_0
+    nest1_3 --> N9
+    N4 --> S0
+    S0 --> N12
+    S0 -.-> N8
+    S0 --> N13
+    N7 --> S1
+    S1 -.-> N14
+    S1 --> N9
+    N4 --> |licenses| M0
+    N3 -.-> M0
+    N0 -.-> M0
+    M0 -.-> N10
+    N5 -.-> |mixes| M1
+    N1 -.-> M1
+    M1 -.-> N7
+    N1 --> M2
+    N7 --> M2
+    N5 -.-> M2
+    N12 -.-> M2
+    M2 --> N15
+    style N0 fill:#EDE7F6,stroke:#7E57C2
+    style N1 fill:#F8FDD3,stroke:#D3EB9F
+    style N2 fill:#EDE7F6,stroke:#7E57C2
+    style N3 fill:#F8FDD3,stroke:#D3EB9F
+    style N4 fill:#EDE7F6,stroke:#7E57C2
+    style N5 fill:#E4E0DF,stroke:#BDAFA8
+    style N6 fill:#F8FDD3,stroke:#D3EB9F
+    style N7 fill:#E4E0DF,stroke:#BDAFA8
+    style N8 fill:#E4E0DF,stroke:#BDAFA8
+    style N9 fill:#E4E0DF,stroke:#BDAFA8
+    style N10 fill:#F8FDD3,stroke:#D3EB9F
+    style N11 fill:#EDE7F6,stroke:#7E57C2
+    style N12 fill:#F8FDD3,stroke:#D3EB9F
+    style N13 fill:#EDE7F6,stroke:#7E57C2
+    style N14 fill:#F8FDD3,stroke:#D3EB9F
+    style N15 fill:#E4E0DF,stroke:#BDAFA8
+    style N16 fill:#E4E0DF,stroke:#BDAFA8
+    style S0 fill:#EDE7F6,stroke:#7E57C2
+    style S1 fill:#F8FDD3,stroke:#D3EB9F
+    style M0 fill:#F8FDD3,stroke:#D3EB9F
+    style M1 fill:#F8FDD3,stroke:#D3EB9F
+    style M2 fill:#E4E0DF,stroke:#BDAFA8
+    style nest0_0 fill:#F8FDD3,stroke:#D3EB9F
+    style nest0_1 fill:#EDE7F6,stroke:#7E57C2
+    style nest0_2 fill:#F8FDD3,stroke:#D3EB9F
+    style nest1_0 fill:#E4E0DF,stroke:#BDAFA8
+    style nest1_1 fill:#E4E0DF,stroke:#BDAFA8
+    style nest1_2 fill:#E4E0DF,stroke:#BDAFA8
+    style nest1_3 fill:#E4E0DF,stroke:#BDAFA8
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#BDAFA8,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#BDAFA8,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_43.txt b/test/mermaid/hard/mermaid_43.txt
new file mode 100644
index 0000000000000000000000000000000000000000..2e8b19ee1c85758f75d92a14b69908bd81d1bfa8
--- /dev/null
+++ b/test/mermaid/hard/mermaid_43.txt
@@ -0,0 +1,46 @@
+<Actor Rehearsal, connectedTo, Ticketing Sales>
+<Actor Rehearsal, partOf, Visual Effects>
+<Animation Production, connectedTo, Set Construction>
+<Animation Production, partOf, Film Distribution>
+<Audience Feedback, connectedTo, Lighting Setup>
+<Audience Feedback, partOf, Visual Effects>
+<Broadcast Scheduling, connectedTo, Live Performance>
+<Budget Planning, connectedTo, Broadcast Scheduling>
+<Budget Planning, connectedTo, Editing Process>
+<Budget Planning, connectedTo, Marketing Campaign>
+<Budget Planning, connectedTo, Sound Engineering>
+<Budget Planning, licenses, Script Writing>
+<Costume Design, connectedTo, Broadcast Scheduling>
+<Costume Design, connectedTo, Footage Review>
+<Costume Design, connectedTo, Live Performance>
+<Costume Design, connectedTo, Premiere Event>
+<Editing Process, connectedTo, Premiere Event>
+<Film Festival Submission, connectedTo, Animation Production>
+<Film Festival Submission, connectedTo, Costume Design>
+<Footage Review, connectedTo, Location Scouting>
+<Game Development, connectedTo, Talent Management>
+<Lighting Setup, connectedTo, Actor Rehearsal>
+<Lighting Setup, partOf, Visual Effects>
+<Live Performance, connectedTo, Script Writing>
+<Marketing Campaign, connectedTo, Editing Process>
+<Marketing Campaign, connectedTo, Footage Review>
+<Premiere Event, connectedTo, Footage Review>
+<Press Junket, connectedTo, Costume Design>
+<Press Junket, connectedTo, Footage Review>
+<Press Junket, connectedTo, Game Development>
+<Script Writing, connectedTo, Trailer Production>
+<Set Construction, connectedTo, Special Effects Design>
+<Set Construction, partOf, Film Distribution>
+<Sound Engineering, connectedTo, Film Festival Submission>
+<Sound Engineering, connectedTo, Footage Review>
+<Sound Engineering, mixes, Costume Design>
+<Special Effects Design, connectedTo, Sound Engineering>
+<Special Effects Design, partOf, Film Distribution>
+<Talent Management, connectedTo, Audience Feedback>
+<Talent Management, connectedTo, Budget Planning>
+<Talent Management, connectedTo, Script Writing>
+<Ticketing Sales, connectedTo, Live Performance>
+<Ticketing Sales, partOf, Visual Effects>
+<Trailer Production, connectedTo, Marketing Campaign>
+<start, connectedTo, Press Junket>
+<start, connectedTo, Script Writing>
diff --git a/test/mermaid/hard/mermaid_44.mmd b/test/mermaid/hard/mermaid_44.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..06f47340f3ad60e5da14a15bbeddad9f564109a9
--- /dev/null
+++ b/test/mermaid/hard/mermaid_44.mmd
@@ -0,0 +1,134 @@
+graph BT
+    N0([Audience Feedback])
+    N1[(Sound Engineering)]
+    N2(Visual Effects)
+    N3([Intellectual Property Protection])
+    N4([Budget Planning])
+    N5([Set Construction])
+    N6[Talent Management]
+    N7(Location Scouting)
+    N8[Game Development]
+    N9(Broadcast Scheduling)
+    N10([Red Carpet Event])
+    N11{Fan Engagement Strategy}
+    N12[[Sponsorship Acquisition]]
+    N13[Premiere Event]
+    N14([Film Festival Submission])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Lighting Setup
+        nest0_0[[Scene Shooting]]
+        nest0_1([Script Writing])
+    end
+    subgraph Film Distribution
+        nest1_0[Casting Call]
+        nest1_1(Special Effects Design)
+        nest1_2(Trailer Production)
+    end
+    N0 -.-> |edits| N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> |innovates| N11
+    N11 --> |rehearses| N12
+    N12 -.-> N13
+    N13 -.-> N14
+    nest0_0 -.-> nest0_1
+    N1 --> nest0_0
+    nest0_1 -.-> N5
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N7 --> |reviews| nest1_0
+    nest1_2 -.-> N14
+    N5 -.-> S0
+    S0 -.-> N7
+    S0 -.-> N9
+    N6 --> S1
+    S1 -.-> N9
+    S1 -.-> N10
+    S1 -.-> N13
+    N10 -.-> S2
+    S2 --> N12
+    S2 --> |sponsors| N14
+    S2 --> N13
+    N0 --> M0
+    N2 -.-> M0
+    N6 --> M0
+    M0 -.-> N11
+    N0 --> M2
+    N10 --> M2
+    M2 --> N13
+    style N0 fill:#B3E5FC,stroke:#03A9F4
+    style N1 fill:#B3E5FC,stroke:#03A9F4
+    style N2 fill:#B3E5FC,stroke:#03A9F4
+    style N3 fill:#B3E5FC,stroke:#03A9F4
+    style N4 fill:#B3E5FC,stroke:#03A9F4
+    style N5 fill:#B3E5FC,stroke:#03A9F4
+    style N6 fill:#B3E5FC,stroke:#03A9F4
+    style N7 fill:#FFFDE0,stroke:#FFF8A6
+    style N8 fill:#B3E5FC,stroke:#03A9F4
+    style N9 fill:#B3E5FC,stroke:#03A9F4
+    style N10 fill:#B3E5FC,stroke:#03A9F4
+    style N11 fill:#B3E5FC,stroke:#03A9F4
+    style N12 fill:#B3E5FC,stroke:#03A9F4
+    style N13 fill:#B3E5FC,stroke:#03A9F4
+    style N14 fill:#B3E5FC,stroke:#03A9F4
+    style S0 fill:#FFECB3,stroke:#FFC107
+    style S1 fill:#FFECB3,stroke:#FFC107
+    style S2 fill:#B3E5FC,stroke:#03A9F4
+    style M0 fill:#FFECB3,stroke:#FFC107
+    style M2 fill:#FFFDE0,stroke:#FFF8A6
+    style nest0_0 fill:#FFECB3,stroke:#FFC107
+    style nest0_1 fill:#FFECB3,stroke:#FFC107
+    style nest1_0 fill:#B3E5FC,stroke:#03A9F4
+    style nest1_1 fill:#FFFDE0,stroke:#FFF8A6
+    style nest1_2 fill:#FFFDE0,stroke:#FFF8A6
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_46.mmd b/test/mermaid/hard/mermaid_46.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..a9115aa8fbe97d158cf7c1f8f2684bfe6196d5c5
--- /dev/null
+++ b/test/mermaid/hard/mermaid_46.mmd
@@ -0,0 +1,122 @@
+graph RL
+    N0([start])
+    N1[Biodiversity Conservation]
+    N2[/Carbon Footprint Calculation/]
+    N3[[Conservation Easement]]
+    N4(Environmental Research)
+    N5[Green Certification]
+    N6{Climate Modeling}
+    N7[Sustainability Review]
+    N8[(Environmental Education Programs)]
+    N9{Waste Water Treatment}
+    N10[Citizen Science Initiative]
+    N11[Water Sampling]
+    S0(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Ecosystem Restoration
+        nest0_0(Energy Audit)
+        nest0_1[(Sustainable Agriculture Practices)]
+        nest0_2{Ocean Cleanup}
+    end
+    subgraph Air Quality Monitoring
+        nest1_0{Coastal Erosion Control}
+        nest1_1[Regulatory Compliance]
+        nest1_2[/Policy Advocacy/]
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> |collaborates| N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N10 -.-> nest0_0
+    nest0_2 -.-> N5
+    nest1_0 -.-> |recycles| nest1_1
+    nest1_1 -.-> nest1_2
+    N3 -.-> nest1_0
+    nest1_2 -.-> N3
+    N6 --> S0
+    S0 --> N8
+    S0 -.-> N10
+    S0 -.-> N11
+    S0 -.-> N9
+    N5 -.-> S2
+    S2 -.-> N11
+    S2 --> N9
+    N5 --> |measures| M0
+    N3 -.-> M0
+    N2 --> M0
+    M0 -.-> N7
+    N1 -.-> M1
+    N3 -.-> M1
+    N0 --> M1
+    N4 -.-> |advocates| M1
+    M1 --> N6
+    style N0 fill:#EDE7F6,stroke:#7E57C2
+    style N1 fill:#EDE7F6,stroke:#7E57C2
+    style N2 fill:#EDE7F6,stroke:#7E57C2
+    style N3 fill:#EDE7F6,stroke:#7E57C2
+    style N4 fill:#EDE7F6,stroke:#7E57C2
+    style N5 fill:#FFCCBC,stroke:#FF5722
+    style N6 fill:#FFCCBC,stroke:#FF5722
+    style N7 fill:#FFCCBC,stroke:#FF5722
+    style N8 fill:#FFCCBC,stroke:#FF5722
+    style N9 fill:#EDE7F6,stroke:#7E57C2
+    style N10 fill:#F1F8E9,stroke:#388E3C
+    style N11 fill:#FFCCBC,stroke:#FF5722
+    style S0 fill:#F1F8E9,stroke:#388E3C
+    style S2 fill:#FFCCBC,stroke:#FF5722
+    style M0 fill:#FFCCBC,stroke:#FF5722
+    style M1 fill:#F1F8E9,stroke:#388E3C
+    style nest0_0 fill:#EDE7F6,stroke:#7E57C2
+    style nest0_1 fill:#FFCCBC,stroke:#FF5722
+    style nest0_2 fill:#FFCCBC,stroke:#FF5722
+    style nest1_0 fill:#EDE7F6,stroke:#7E57C2
+    style nest1_1 fill:#EDE7F6,stroke:#7E57C2
+    style nest1_2 fill:#EDE7F6,stroke:#7E57C2
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#388E3C,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_47.mmd b/test/mermaid/hard/mermaid_47.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..90ad1d0ea079f74ac0a219108ebf35ae27e10d1d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_47.mmd
@@ -0,0 +1,124 @@
+graph TD
+    N0([Climate Modeling])
+    N1[Energy Audit]
+    N2([Stormwater Management])
+    N3(Environmental Research)
+    N4[[Air Quality Monitoring]]
+    N5[[Public Awareness Campaign]]
+    N6{Environmental Impact Assessment}
+    N7{Pollution Control Technology}
+    N8[[Biodiversity Conservation]]
+    N9{Noise Pollution Measurement}
+    N10[[Species Reintroduction]]
+    N11{Water Sampling}
+    N12[Hazardous Material Handling]
+    N13[[Recycling Process]]
+    N14([Citizen Science Initiative])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Resource Tracking
+        nest0_0[Conservation Easement]
+        nest0_1[Waste Water Treatment]
+        nest0_2[/Renewable Energy Project Development/]
+    end
+    subgraph Waste Collection
+        nest1_0[Wildlife Survey]
+        nest1_1[(Landfill Management)]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> |samples| N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    N6 -.-> nest0_0
+    nest0_2 --> N12
+    nest1_0 --> nest1_1
+    N11 -.-> nest1_0
+    nest1_1 --> N13
+    N1 -.-> S0
+    S0 --> N8
+    S0 --> N7
+    N6 --> S1
+    S1 --> |manages| N10
+    S1 -.-> N8
+    S1 --> N13
+    N10 -.-> M0
+    N1 --> M0
+    M0 --> N12
+    N7 -.-> M2
+    N9 --> M2
+    N2 --> M2
+    M2 --> N12
+    style N0 fill:#FAEBF3,stroke:#F7BEE0
+    style N1 fill:#BBDEFB,stroke:#2196F3
+    style N2 fill:#BBDEFB,stroke:#2196F3
+    style N3 fill:#FAEBF3,stroke:#F7BEE0
+    style N4 fill:#BBDEFB,stroke:#2196F3
+    style N5 fill:#BBDEFB,stroke:#2196F3
+    style N6 fill:#FAEBF3,stroke:#F7BEE0
+    style N7 fill:#BBDEFB,stroke:#2196F3
+    style N8 fill:#FAEBF3,stroke:#F7BEE0
+    style N9 fill:#BBDEFB,stroke:#2196F3
+    style N10 fill:#BBDEFB,stroke:#2196F3
+    style N11 fill:#EDE7F6,stroke:#9575CD
+    style N12 fill:#FAEBF3,stroke:#F7BEE0
+    style N13 fill:#FAEBF3,stroke:#F7BEE0
+    style N14 fill:#BBDEFB,stroke:#2196F3
+    style S0 fill:#FAEBF3,stroke:#F7BEE0
+    style S1 fill:#EDE7F6,stroke:#9575CD
+    style M0 fill:#FAEBF3,stroke:#F7BEE0
+    style M2 fill:#FAEBF3,stroke:#F7BEE0
+    style nest0_0 fill:#FAEBF3,stroke:#F7BEE0
+    style nest0_1 fill:#EDE7F6,stroke:#9575CD
+    style nest0_2 fill:#FAEBF3,stroke:#F7BEE0
+    style nest1_0 fill:#BBDEFB,stroke:#2196F3
+    style nest1_1 fill:#BBDEFB,stroke:#2196F3
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_47.txt b/test/mermaid/hard/mermaid_47.txt
new file mode 100644
index 0000000000000000000000000000000000000000..a67d980caba89eb3bc9159f554bd549ac0cf5637
--- /dev/null
+++ b/test/mermaid/hard/mermaid_47.txt
@@ -0,0 +1,36 @@
+<Air Quality Monitoring, connectedTo, Public Awareness Campaign>
+<Biodiversity Conservation, connectedTo, Noise Pollution Measurement>
+<Climate Modeling, connectedTo, Energy Audit>
+<Conservation Easement, connectedTo, Waste Water Treatment>
+<Conservation Easement, partOf, Resource Tracking>
+<Energy Audit, connectedTo, Biodiversity Conservation>
+<Energy Audit, connectedTo, Hazardous Material Handling>
+<Energy Audit, connectedTo, Pollution Control Technology>
+<Energy Audit, connectedTo, Stormwater Management>
+<Environmental Impact Assessment, connectedTo, Biodiversity Conservation>
+<Environmental Impact Assessment, connectedTo, Conservation Easement>
+<Environmental Impact Assessment, connectedTo, Pollution Control Technology>
+<Environmental Impact Assessment, connectedTo, Recycling Process>
+<Environmental Impact Assessment, manages, Species Reintroduction>
+<Environmental Research, connectedTo, Air Quality Monitoring>
+<Hazardous Material Handling, connectedTo, Recycling Process>
+<Landfill Management, connectedTo, Recycling Process>
+<Landfill Management, partOf, Waste Collection>
+<Noise Pollution Measurement, connectedTo, Hazardous Material Handling>
+<Noise Pollution Measurement, connectedTo, Species Reintroduction>
+<Pollution Control Technology, connectedTo, Biodiversity Conservation>
+<Pollution Control Technology, connectedTo, Hazardous Material Handling>
+<Public Awareness Campaign, samples, Environmental Impact Assessment>
+<Recycling Process, connectedTo, Citizen Science Initiative>
+<Renewable Energy Project Development, connectedTo, Hazardous Material Handling>
+<Renewable Energy Project Development, partOf, Resource Tracking>
+<Species Reintroduction, connectedTo, Hazardous Material Handling>
+<Species Reintroduction, connectedTo, Water Sampling>
+<Stormwater Management, connectedTo, Environmental Research>
+<Stormwater Management, connectedTo, Hazardous Material Handling>
+<Waste Water Treatment, connectedTo, Renewable Energy Project Development>
+<Waste Water Treatment, partOf, Resource Tracking>
+<Water Sampling, connectedTo, Hazardous Material Handling>
+<Water Sampling, connectedTo, Wildlife Survey>
+<Wildlife Survey, connectedTo, Landfill Management>
+<Wildlife Survey, partOf, Waste Collection>
diff --git a/test/mermaid/hard/mermaid_48.mmd b/test/mermaid/hard/mermaid_48.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..b2217a7c7cc89c4ea816fd03cf2b58035f3386b9
--- /dev/null
+++ b/test/mermaid/hard/mermaid_48.mmd
@@ -0,0 +1,128 @@
+graph BT
+    N0([start])
+    N1[[Waste Water Treatment]]
+    N2{Ecosystem Restoration}
+    N3(Soil Testing)
+    N4([Landfill Management])
+    N5([Pollution Control Technology])
+    N6[(Resource Recovery)]
+    N7(Emission Reporting)
+    N8(Coastal Erosion Control)
+    N9([Citizen Science Initiative])
+    N10[Ecological Footprint Analysis]
+    N11([Recycling Process])
+    N12([Water Sampling])
+    N13[/Environmental Research/]
+    N14(Public Awareness Campaign)
+    N15[(Conservation Easement)]
+    N16([end])
+    S0(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Hazardous Material Handling
+        nest0_0[Sustainable Agriculture Practices]
+        nest0_1(Reforestation Planning)
+        nest0_2(Environmental Education Programs)
+        nest0_3([Ocean Cleanup])
+    end
+    subgraph Renewable Energy Project Development
+        nest1_0[Noise Pollution Measurement]
+        nest1_1[Renewable Energy Grid Integration]
+        nest1_2(Wildlife Survey)
+    end
+    N0 --> N1
+    N1 -.-> |no| N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 -.-> N16
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N1 -.-> nest0_0
+    nest0_3 -.-> N13
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N11 --> nest1_0
+    nest1_2 -.-> |no| N14
+    N10 --> S0
+    S0 --> N15
+    S0 --> N14
+    S0 --> |no| N13
+    N11 -.-> S2
+    S2 -.-> N13
+    S2 --> N15
+    N2 -.-> M0
+    N5 --> M0
+    N7 --> M0
+    M0 -.-> N11
+    N4 -.-> M1
+    N1 -.-> M1
+    N7 --> M1
+    M1 -.-> N10
+    N5 --> M2
+    N3 -.-> M2
+    N2 --> M2
+    M2 --> N7
+    style S0 fill:#FFE88D,stroke:#FFDA4E
+    style S2 fill:#EBEBEB,stroke:#E0E0E0
+    style M0 fill:#FFE88D,stroke:#FFDA4E
+    style M1 fill:#FFCCBC,stroke:#FF5722
+    style M2 fill:#EBEBEB,stroke:#E0E0E0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#FF5722,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_48.txt b/test/mermaid/hard/mermaid_48.txt
new file mode 100644
index 0000000000000000000000000000000000000000..010ed6a347707c5bc6a07d21f8ce0312f64d4947
--- /dev/null
+++ b/test/mermaid/hard/mermaid_48.txt
@@ -0,0 +1,46 @@
+<Citizen Science Initiative, connectedTo, Ecological Footprint Analysis>
+<Coastal Erosion Control, connectedTo, Citizen Science Initiative>
+<Conservation Easement, connectedTo, end>
+<Ecological Footprint Analysis, connectedTo, Conservation Easement>
+<Ecological Footprint Analysis, connectedTo, Public Awareness Campaign>
+<Ecological Footprint Analysis, connectedTo, Recycling Process>
+<Ecological Footprint Analysis, no, Environmental Research>
+<Ecosystem Restoration, connectedTo, Emission Reporting>
+<Ecosystem Restoration, connectedTo, Recycling Process>
+<Ecosystem Restoration, connectedTo, Soil Testing>
+<Emission Reporting, connectedTo, Coastal Erosion Control>
+<Emission Reporting, connectedTo, Ecological Footprint Analysis>
+<Emission Reporting, connectedTo, Recycling Process>
+<Environmental Education Programs, connectedTo, Ocean Cleanup>
+<Environmental Education Programs, partOf, Hazardous Material Handling>
+<Environmental Research, connectedTo, Public Awareness Campaign>
+<Landfill Management, connectedTo, Ecological Footprint Analysis>
+<Landfill Management, connectedTo, Pollution Control Technology>
+<Noise Pollution Measurement, connectedTo, Renewable Energy Grid Integration>
+<Noise Pollution Measurement, partOf, Renewable Energy Project Development>
+<Ocean Cleanup, connectedTo, Environmental Research>
+<Ocean Cleanup, partOf, Hazardous Material Handling>
+<Pollution Control Technology, connectedTo, Emission Reporting>
+<Pollution Control Technology, connectedTo, Recycling Process>
+<Pollution Control Technology, connectedTo, Resource Recovery>
+<Public Awareness Campaign, connectedTo, Conservation Easement>
+<Recycling Process, connectedTo, Conservation Easement>
+<Recycling Process, connectedTo, Environmental Research>
+<Recycling Process, connectedTo, Noise Pollution Measurement>
+<Recycling Process, connectedTo, Water Sampling>
+<Reforestation Planning, connectedTo, Environmental Education Programs>
+<Reforestation Planning, partOf, Hazardous Material Handling>
+<Renewable Energy Grid Integration, connectedTo, Wildlife Survey>
+<Renewable Energy Grid Integration, partOf, Renewable Energy Project Development>
+<Resource Recovery, connectedTo, Emission Reporting>
+<Soil Testing, connectedTo, Emission Reporting>
+<Soil Testing, connectedTo, Landfill Management>
+<Sustainable Agriculture Practices, connectedTo, Reforestation Planning>
+<Sustainable Agriculture Practices, partOf, Hazardous Material Handling>
+<Waste Water Treatment, connectedTo, Ecological Footprint Analysis>
+<Waste Water Treatment, connectedTo, Sustainable Agriculture Practices>
+<Waste Water Treatment, no, Ecosystem Restoration>
+<Water Sampling, connectedTo, Environmental Research>
+<Wildlife Survey, no, Public Awareness Campaign>
+<Wildlife Survey, partOf, Renewable Energy Project Development>
+<start, connectedTo, Waste Water Treatment>
diff --git a/test/mermaid/hard/mermaid_49.mmd b/test/mermaid/hard/mermaid_49.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..8e77c657fffcf0524d31ced8728b766c60c6acd7
--- /dev/null
+++ b/test/mermaid/hard/mermaid_49.mmd
@@ -0,0 +1,130 @@
+graph RL
+    N0([start])
+    N1[(Business Licensing)]
+    N2{Policy Drafting}
+    N3[Budget Allocation]
+    N4([Passport Issuance])
+    N5[Public Hearing]
+    N6[Vehicle Registration]
+    N7(Grant Distribution)
+    N8[Social Program Review]
+    N9{Border Control}
+    N10[Infrastructure Planning]
+    N11[(Public Consultation)]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Diplomatic Negotiation
+        nest0_0[Open Government Data Initiative]
+        nest0_1[(Public Sector Procurement)]
+        nest0_2[[International Relations]]
+    end
+    subgraph Service Registration
+        nest1_0[(ID Verification)]
+        nest1_1[[Interdepartmental Approval]]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> |plans| N11
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N7 -.-> nest0_0
+    nest0_2 --> N3
+    nest1_0 --> nest1_1
+    N9 --> |licenses| nest1_0
+    nest1_1 -.-> N5
+    N7 -.-> S0
+    S0 --> |communicates| N11
+    S0 -.-> N9
+    S0 -.-> N10
+    N4 -.-> S1
+    S1 -.-> N8
+    S1 -.-> |consults| N9
+    N5 --> S2
+    S2 -.-> |inspects| N10
+    S2 -.-> N11
+    N8 -.-> M0
+    N3 -.-> M0
+    M0 -.-> N10
+    N2 --> M1
+    N5 --> M1
+    M1 --> N7
+    N2 --> M2
+    N1 --> M2
+    N0 --> M2
+    N3 --> |coordinates| M2
+    M2 -.-> N5
+    style N0 fill:#F1F8E9,stroke:#388E3C
+    style N1 fill:#D3D7EB,stroke:#8C9EFF
+    style N2 fill:#FFF9D4,stroke:#FFE69C
+    style N3 fill:#D3D7EB,stroke:#8C9EFF
+    style N4 fill:#D3D7EB,stroke:#8C9EFF
+    style N5 fill:#D3D7EB,stroke:#8C9EFF
+    style N6 fill:#D3D7EB,stroke:#8C9EFF
+    style N7 fill:#FFF9D4,stroke:#FFE69C
+    style N8 fill:#FFF9D4,stroke:#FFE69C
+    style N9 fill:#D3D7EB,stroke:#8C9EFF
+    style N10 fill:#FFF9D4,stroke:#FFE69C
+    style N11 fill:#F1F8E9,stroke:#388E3C
+    style S0 fill:#FFF9D4,stroke:#FFE69C
+    style S1 fill:#F1F8E9,stroke:#388E3C
+    style S2 fill:#F1F8E9,stroke:#388E3C
+    style M0 fill:#F1F8E9,stroke:#388E3C
+    style M1 fill:#FFF9D4,stroke:#FFE69C
+    style M2 fill:#FFF9D4,stroke:#FFE69C
+    style nest0_0 fill:#F1F8E9,stroke:#388E3C
+    style nest0_1 fill:#D3D7EB,stroke:#8C9EFF
+    style nest0_2 fill:#FFF9D4,stroke:#FFE69C
+    style nest1_0 fill:#FFF9D4,stroke:#FFE69C
+    style nest1_1 fill:#D3D7EB,stroke:#8C9EFF
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#8C9EFF,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_49.txt b/test/mermaid/hard/mermaid_49.txt
new file mode 100644
index 0000000000000000000000000000000000000000..f7428ec41255b440cb288fb1bf7776d5eaaf27c6
--- /dev/null
+++ b/test/mermaid/hard/mermaid_49.txt
@@ -0,0 +1,38 @@
+<Border Control, connectedTo, Infrastructure Planning>
+<Border Control, licenses, ID Verification>
+<Budget Allocation, connectedTo, Infrastructure Planning>
+<Budget Allocation, connectedTo, Passport Issuance>
+<Budget Allocation, coordinates, Public Hearing>
+<Business Licensing, connectedTo, Policy Drafting>
+<Business Licensing, connectedTo, Public Hearing>
+<Grant Distribution, communicates, Public Consultation>
+<Grant Distribution, connectedTo, Border Control>
+<Grant Distribution, connectedTo, Infrastructure Planning>
+<Grant Distribution, connectedTo, Open Government Data Initiative>
+<Grant Distribution, connectedTo, Social Program Review>
+<ID Verification, connectedTo, Interdepartmental Approval>
+<ID Verification, partOf, Service Registration>
+<Infrastructure Planning, plans, Public Consultation>
+<Interdepartmental Approval, connectedTo, Public Hearing>
+<Interdepartmental Approval, partOf, Service Registration>
+<International Relations, connectedTo, Budget Allocation>
+<International Relations, partOf, Diplomatic Negotiation>
+<Open Government Data Initiative, connectedTo, Public Sector Procurement>
+<Open Government Data Initiative, partOf, Diplomatic Negotiation>
+<Passport Issuance, connectedTo, Public Hearing>
+<Passport Issuance, connectedTo, Social Program Review>
+<Passport Issuance, consults, Border Control>
+<Policy Drafting, connectedTo, Budget Allocation>
+<Policy Drafting, connectedTo, Grant Distribution>
+<Policy Drafting, connectedTo, Public Hearing>
+<Public Hearing, connectedTo, Grant Distribution>
+<Public Hearing, connectedTo, Public Consultation>
+<Public Hearing, connectedTo, Vehicle Registration>
+<Public Hearing, inspects, Infrastructure Planning>
+<Public Sector Procurement, connectedTo, International Relations>
+<Public Sector Procurement, partOf, Diplomatic Negotiation>
+<Social Program Review, connectedTo, Border Control>
+<Social Program Review, connectedTo, Infrastructure Planning>
+<Vehicle Registration, connectedTo, Grant Distribution>
+<start, connectedTo, Business Licensing>
+<start, connectedTo, Public Hearing>
diff --git a/test/mermaid/hard/mermaid_5.mmd b/test/mermaid/hard/mermaid_5.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..c4ca3e560b02729eb74637681e5ec0fc92114c46
--- /dev/null
+++ b/test/mermaid/hard/mermaid_5.mmd
@@ -0,0 +1,148 @@
+graph TD
+    N0([Blood Test])
+    N1(Telemedicine Consultation)
+    N2[Patient Transfer]
+    N3([Triage])
+    N4[Mental Health Assessment]
+    N5{Diagnosis}
+    N6[[Patient Education]]
+    N7[(Medical History)]
+    N8[[Anesthesia Administration]]
+    N9(Surgery)
+    N10(Nutritional Counseling)
+    N11(Insurance Claim)
+    N12(Medical Record Keeping)
+    N13[Home Care Visit]
+    N14([Vaccination])
+    N15{Pain Management}
+    N16([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Rehabilitation Therapy
+        nest0_0[(Clinical Trial)]
+        nest0_1[/Health Screening/]
+    end
+    subgraph Physical Examination
+        nest1_0[Treatment Plan]
+        nest1_1([Biopsy])
+    end
+    N0 --> |discharges| N1
+    N1 --> N2
+    N2 -.-> |prevents| N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> |refers| N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    N15 -.-> N16
+    nest0_0 --> nest0_1
+    N15 --> nest0_0
+    nest0_1 -.-> N7
+    nest1_0 -.-> nest1_1
+    N3 -.-> nest1_0
+    nest1_1 -.-> |researches| N15
+    N12 --> S0
+    S0 --> |interprets| N14
+    S0 -.-> N16
+    S0 -.-> N15
+    N3 -.-> S1
+    S1 --> N11
+    S1 -.-> |consults| N13
+    S1 -.-> N10
+    S1 -.-> N7
+    N11 --> S2
+    S2 --> N14
+    S2 --> |manages| N15
+    S2 -.-> N16
+    N5 --> M0
+    N10 --> M0
+    M0 --> N13
+    N4 -.-> M1
+    N5 --> |counsels| M1
+    M1 --> N10
+    N4 -.-> M2
+    N11 --> M2
+    M2 -.-> N14
+    style N0 fill:#DACBE3,stroke:#A188D0
+    style N1 fill:#FFF6D9,stroke:#FFCC7A
+    style N2 fill:#FFF6D9,stroke:#FFCC7A
+    style N3 fill:#FFFDE7,stroke:#FFF176
+    style N4 fill:#DACBE3,stroke:#A188D0
+    style N5 fill:#FFF6D9,stroke:#FFCC7A
+    style N6 fill:#FFFDE7,stroke:#FFF176
+    style N7 fill:#DACBE3,stroke:#A188D0
+    style N8 fill:#FFFDE7,stroke:#FFF176
+    style N9 fill:#FFFDE7,stroke:#FFF176
+    style N10 fill:#FFFDE7,stroke:#FFF176
+    style N11 fill:#FFF6D9,stroke:#FFCC7A
+    style N12 fill:#FFF6D9,stroke:#FFCC7A
+    style N13 fill:#FFFDE7,stroke:#FFF176
+    style N14 fill:#FFFDE7,stroke:#FFF176
+    style N15 fill:#FFFDE7,stroke:#FFF176
+    style N16 fill:#FFF6D9,stroke:#FFCC7A
+    style S0 fill:#FFF6D9,stroke:#FFCC7A
+    style S1 fill:#DACBE3,stroke:#A188D0
+    style S2 fill:#DACBE3,stroke:#A188D0
+    style M0 fill:#FFFDE7,stroke:#FFF176
+    style M1 fill:#FFF6D9,stroke:#FFCC7A
+    style M2 fill:#FFFDE7,stroke:#FFF176
+    style nest0_0 fill:#DACBE3,stroke:#A188D0
+    style nest0_1 fill:#DACBE3,stroke:#A188D0
+    style nest1_0 fill:#DACBE3,stroke:#A188D0
+    style nest1_1 fill:#FFFDE7,stroke:#FFF176
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#FFCC7A,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#A188D0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_5.txt b/test/mermaid/hard/mermaid_5.txt
new file mode 100644
index 0000000000000000000000000000000000000000..111127089680a94c411932b3c29b1ae871342095
--- /dev/null
+++ b/test/mermaid/hard/mermaid_5.txt
@@ -0,0 +1,41 @@
+<Anesthesia Administration, connectedTo, Surgery>
+<Biopsy, partOf, Physical Examination>
+<Biopsy, researches, Pain Management>
+<Blood Test, discharges, Telemedicine Consultation>
+<Clinical Trial, connectedTo, Health Screening>
+<Clinical Trial, partOf, Rehabilitation Therapy>
+<Diagnosis, connectedTo, Home Care Visit>
+<Diagnosis, counsels, Nutritional Counseling>
+<Diagnosis, refers, Patient Education>
+<Health Screening, connectedTo, Medical History>
+<Health Screening, partOf, Rehabilitation Therapy>
+<Home Care Visit, connectedTo, Vaccination>
+<Insurance Claim, connectedTo, Medical Record Keeping>
+<Insurance Claim, connectedTo, Vaccination>
+<Insurance Claim, connectedTo, end>
+<Insurance Claim, manages, Pain Management>
+<Medical History, connectedTo, Anesthesia Administration>
+<Medical Record Keeping, connectedTo, Home Care Visit>
+<Medical Record Keeping, connectedTo, Pain Management>
+<Medical Record Keeping, connectedTo, end>
+<Medical Record Keeping, interprets, Vaccination>
+<Mental Health Assessment, connectedTo, Diagnosis>
+<Mental Health Assessment, connectedTo, Nutritional Counseling>
+<Mental Health Assessment, connectedTo, Vaccination>
+<Nutritional Counseling, connectedTo, Home Care Visit>
+<Nutritional Counseling, connectedTo, Insurance Claim>
+<Pain Management, connectedTo, Clinical Trial>
+<Pain Management, connectedTo, end>
+<Patient Education, connectedTo, Medical History>
+<Patient Transfer, prevents, Triage>
+<Surgery, connectedTo, Nutritional Counseling>
+<Telemedicine Consultation, connectedTo, Patient Transfer>
+<Treatment Plan, connectedTo, Biopsy>
+<Treatment Plan, partOf, Physical Examination>
+<Triage, connectedTo, Insurance Claim>
+<Triage, connectedTo, Medical History>
+<Triage, connectedTo, Mental Health Assessment>
+<Triage, connectedTo, Nutritional Counseling>
+<Triage, connectedTo, Treatment Plan>
+<Triage, consults, Home Care Visit>
+<Vaccination, connectedTo, Pain Management>
diff --git a/test/mermaid/hard/mermaid_50.mmd b/test/mermaid/hard/mermaid_50.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..bfde352019f015adf85d06728f7ce556a641680b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_50.mmd
@@ -0,0 +1,150 @@
+graph LR
+    N0([Grant Distribution])
+    N1[(Business Licensing)]
+    N2[Infrastructure Planning]
+    N3[[Emergency Preparedness]]
+    N4([Budget Allocation])
+    N5[[Public Consultation]]
+    N6[ID Verification]
+    N7[(Legislation Review)]
+    N8(Education Policy)
+    N9[International Relations]
+    N10([Diplomatic Negotiation])
+    N11[(Whistleblower Protection)]
+    N12[(Compliance Checking)]
+    N13[Border Control]
+    N14[Census Collection]
+    N15[Passport Issuance]
+    N16([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Service Registration
+        nest0_0[[Public Records Request]]
+        nest0_1[[Veterans Affairs]]
+        nest0_2[(Vehicle Registration)]
+    end
+    subgraph Data Publishing
+        nest1_0[(National Defense)]
+        nest1_1(Interdepartmental Approval)
+        nest1_2[(Legal Advisory)]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> |analyzes| N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 -.-> N16
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N15 --> nest0_0
+    nest0_2 -.-> N11
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N4 -.-> nest1_0
+    nest1_2 --> N12
+    N5 -.-> S0
+    S0 --> N12
+    S0 --> N13
+    N7 --> S1
+    S1 -.-> N15
+    S1 --> N13
+    S1 -.-> N11
+    S1 -.-> N16
+    N12 --> S2
+    S2 -.-> N16
+    S2 --> N14
+    S2 -.-> N15
+    N4 -.-> M0
+    N3 --> M0
+    M0 --> N10
+    N7 --> M1
+    N3 --> M1
+    N8 --> M1
+    N10 -.-> M1
+    M1 --> N12
+    style N0 fill:#F1F8FF,stroke:#42A5F5
+    style N1 fill:#FFCDD2,stroke:#F44336
+    style N2 fill:#F1F8FF,stroke:#42A5F5
+    style N3 fill:#FFCDD2,stroke:#F44336
+    style N4 fill:#F1F8FF,stroke:#42A5F5
+    style N5 fill:#FFECB3,stroke:#FFC107
+    style N6 fill:#FFECB3,stroke:#FFC107
+    style N7 fill:#FFCDD2,stroke:#F44336
+    style N8 fill:#FFECB3,stroke:#FFC107
+    style N9 fill:#F1F8FF,stroke:#42A5F5
+    style N10 fill:#FFECB3,stroke:#FFC107
+    style N11 fill:#F1F8FF,stroke:#42A5F5
+    style N12 fill:#FFECB3,stroke:#FFC107
+    style N13 fill:#FFECB3,stroke:#FFC107
+    style N14 fill:#FFCDD2,stroke:#F44336
+    style N15 fill:#FFECB3,stroke:#FFC107
+    style N16 fill:#FFECB3,stroke:#FFC107
+    style S0 fill:#FFCDD2,stroke:#F44336
+    style S1 fill:#FFCDD2,stroke:#F44336
+    style S2 fill:#FFCDD2,stroke:#F44336
+    style M0 fill:#F1F8FF,stroke:#42A5F5
+    style M1 fill:#F1F8FF,stroke:#42A5F5
+    style nest0_0 fill:#FFCDD2,stroke:#F44336
+    style nest0_1 fill:#FFCDD2,stroke:#F44336
+    style nest0_2 fill:#FFCDD2,stroke:#F44336
+    style nest1_0 fill:#F1F8FF,stroke:#42A5F5
+    style nest1_1 fill:#F1F8FF,stroke:#42A5F5
+    style nest1_2 fill:#FFCDD2,stroke:#F44336
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#F44336,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#F44336,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#F44336,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#FFC107,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#FFC107,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_50.txt b/test/mermaid/hard/mermaid_50.txt
new file mode 100644
index 0000000000000000000000000000000000000000..9ad2835df087426a1a8b91db07506c7d6778a161
--- /dev/null
+++ b/test/mermaid/hard/mermaid_50.txt
@@ -0,0 +1,45 @@
+<Border Control, connectedTo, Census Collection>
+<Budget Allocation, connectedTo, Diplomatic Negotiation>
+<Budget Allocation, connectedTo, National Defense>
+<Budget Allocation, connectedTo, Public Consultation>
+<Business Licensing, connectedTo, Infrastructure Planning>
+<Census Collection, connectedTo, Passport Issuance>
+<Compliance Checking, connectedTo, Border Control>
+<Compliance Checking, connectedTo, Census Collection>
+<Compliance Checking, connectedTo, Passport Issuance>
+<Compliance Checking, connectedTo, end>
+<Diplomatic Negotiation, connectedTo, Compliance Checking>
+<Diplomatic Negotiation, connectedTo, Whistleblower Protection>
+<Education Policy, connectedTo, Compliance Checking>
+<Education Policy, connectedTo, International Relations>
+<Emergency Preparedness, connectedTo, Budget Allocation>
+<Emergency Preparedness, connectedTo, Compliance Checking>
+<Emergency Preparedness, connectedTo, Diplomatic Negotiation>
+<Grant Distribution, connectedTo, Business Licensing>
+<ID Verification, connectedTo, Legislation Review>
+<Infrastructure Planning, connectedTo, Emergency Preparedness>
+<Interdepartmental Approval, connectedTo, Legal Advisory>
+<Interdepartmental Approval, partOf, Data Publishing>
+<International Relations, connectedTo, Diplomatic Negotiation>
+<Legal Advisory, connectedTo, Compliance Checking>
+<Legal Advisory, partOf, Data Publishing>
+<Legislation Review, connectedTo, Border Control>
+<Legislation Review, connectedTo, Compliance Checking>
+<Legislation Review, connectedTo, Education Policy>
+<Legislation Review, connectedTo, Passport Issuance>
+<Legislation Review, connectedTo, Whistleblower Protection>
+<Legislation Review, connectedTo, end>
+<National Defense, connectedTo, Interdepartmental Approval>
+<National Defense, partOf, Data Publishing>
+<Passport Issuance, connectedTo, Public Records Request>
+<Passport Issuance, connectedTo, end>
+<Public Consultation, connectedTo, Border Control>
+<Public Consultation, connectedTo, Compliance Checking>
+<Public Consultation, connectedTo, ID Verification>
+<Public Records Request, connectedTo, Veterans Affairs>
+<Public Records Request, partOf, Service Registration>
+<Vehicle Registration, connectedTo, Whistleblower Protection>
+<Vehicle Registration, partOf, Service Registration>
+<Veterans Affairs, connectedTo, Vehicle Registration>
+<Veterans Affairs, partOf, Service Registration>
+<Whistleblower Protection, analyzes, Compliance Checking>
diff --git a/test/mermaid/hard/mermaid_51.mmd b/test/mermaid/hard/mermaid_51.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..8ac561dfc19b980bea964556039a591c2280c285
--- /dev/null
+++ b/test/mermaid/hard/mermaid_51.mmd
@@ -0,0 +1,154 @@
+graph LR
+    N0([Emergency Preparedness])
+    N1([Public Records Request])
+    N2[(Infrastructure Planning)]
+    N3{Service Registration}
+    N4[/Urban Planning/]
+    N5([Compliance Checking])
+    N6[International Relations]
+    N7[/Veterans Affairs/]
+    N8([Whistleblower Protection])
+    N9[(Public Works Maintenance)]
+    N10[[Legislation Review]]
+    N11([Public Sector Procurement])
+    N12([Vehicle Registration])
+    N13(Driver's License Renewal)
+    N14[/Budget Allocation/]
+    N15[Diplomatic Negotiation]
+    N16[(Passport Issuance)]
+    N17(Open Government Data Initiative)
+    N18[Border Control]
+    N19([Policy Drafting])
+    N20([ID Verification])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Data Publishing
+        nest0_0[(Election Management)]
+        nest0_1[/Grant Distribution/]
+    end
+    subgraph Business Licensing
+        nest1_0(Public Hearing)
+        nest1_1(Education Policy)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> |inspects| N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 -.-> N16
+    N16 --> |mediates| N17
+    N17 -.-> N18
+    N18 --> N19
+    N19 -.-> N20
+    nest0_0 --> nest0_1
+    N10 -.-> nest0_0
+    nest0_1 --> N16
+    nest1_0 --> nest1_1
+    N2 --> |licenses| nest1_0
+    nest1_1 --> N10
+    N8 --> S0
+    S0 -.-> N13
+    S0 --> N14
+    N10 --> S1
+    S1 -.-> N12
+    S1 -.-> |funds| N17
+    S1 --> N14
+    N9 -.-> S2
+    S2 --> N12
+    S2 -.-> N13
+    S2 --> N18
+    N10 -.-> M0
+    N16 -.-> M0
+    N3 -.-> M0
+    M0 --> N19
+    N2 --> M1
+    N12 -.-> |researches| M1
+    M1 -.-> N17
+    style N0 fill:#C8E6C9,stroke:#388E3C
+    style N1 fill:#DACBE3,stroke:#A188D0
+    style N2 fill:#EFEBE9,stroke:#A1887F
+    style N3 fill:#DACBE3,stroke:#A188D0
+    style N4 fill:#C8E6C9,stroke:#388E3C
+    style N5 fill:#C8E6C9,stroke:#388E3C
+    style N6 fill:#C8E6C9,stroke:#388E3C
+    style N7 fill:#DACBE3,stroke:#A188D0
+    style N8 fill:#C8E6C9,stroke:#388E3C
+    style N9 fill:#DACBE3,stroke:#A188D0
+    style N10 fill:#DACBE3,stroke:#A188D0
+    style N11 fill:#DACBE3,stroke:#A188D0
+    style N12 fill:#C8E6C9,stroke:#388E3C
+    style N13 fill:#DACBE3,stroke:#A188D0
+    style N14 fill:#C8E6C9,stroke:#388E3C
+    style N15 fill:#EFEBE9,stroke:#A1887F
+    style N16 fill:#EFEBE9,stroke:#A1887F
+    style N17 fill:#EFEBE9,stroke:#A1887F
+    style N18 fill:#EFEBE9,stroke:#A1887F
+    style N19 fill:#DACBE3,stroke:#A188D0
+    style N20 fill:#C8E6C9,stroke:#388E3C
+    style S0 fill:#DACBE3,stroke:#A188D0
+    style S1 fill:#DACBE3,stroke:#A188D0
+    style S2 fill:#EFEBE9,stroke:#A1887F
+    style M0 fill:#EFEBE9,stroke:#A1887F
+    style M1 fill:#DACBE3,stroke:#A188D0
+    style nest0_0 fill:#EFEBE9,stroke:#A1887F
+    style nest0_1 fill:#DACBE3,stroke:#A188D0
+    style nest1_0 fill:#DACBE3,stroke:#A188D0
+    style nest1_1 fill:#EFEBE9,stroke:#A1887F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#A1887F,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_51.txt b/test/mermaid/hard/mermaid_51.txt
new file mode 100644
index 0000000000000000000000000000000000000000..94c466dcf9da7bb1a59778209a046e21d56a2e72
--- /dev/null
+++ b/test/mermaid/hard/mermaid_51.txt
@@ -0,0 +1,43 @@
+<Border Control, connectedTo, Policy Drafting>
+<Budget Allocation, connectedTo, Diplomatic Negotiation>
+<Compliance Checking, connectedTo, International Relations>
+<Diplomatic Negotiation, connectedTo, Passport Issuance>
+<Driver's License Renewal, connectedTo, Budget Allocation>
+<Education Policy, connectedTo, Legislation Review>
+<Education Policy, partOf, Business Licensing>
+<Election Management, connectedTo, Grant Distribution>
+<Election Management, partOf, Data Publishing>
+<Emergency Preparedness, connectedTo, Public Records Request>
+<Grant Distribution, connectedTo, Passport Issuance>
+<Grant Distribution, partOf, Data Publishing>
+<Infrastructure Planning, connectedTo, Open Government Data Initiative>
+<Infrastructure Planning, connectedTo, Service Registration>
+<Infrastructure Planning, licenses, Public Hearing>
+<International Relations, connectedTo, Veterans Affairs>
+<Legislation Review, connectedTo, Budget Allocation>
+<Legislation Review, connectedTo, Election Management>
+<Legislation Review, connectedTo, Policy Drafting>
+<Legislation Review, connectedTo, Vehicle Registration>
+<Legislation Review, funds, Open Government Data Initiative>
+<Legislation Review, inspects, Public Sector Procurement>
+<Open Government Data Initiative, connectedTo, Border Control>
+<Passport Issuance, connectedTo, Policy Drafting>
+<Passport Issuance, mediates, Open Government Data Initiative>
+<Policy Drafting, connectedTo, ID Verification>
+<Public Hearing, connectedTo, Education Policy>
+<Public Hearing, partOf, Business Licensing>
+<Public Records Request, connectedTo, Infrastructure Planning>
+<Public Sector Procurement, connectedTo, Vehicle Registration>
+<Public Works Maintenance, connectedTo, Border Control>
+<Public Works Maintenance, connectedTo, Driver's License Renewal>
+<Public Works Maintenance, connectedTo, Legislation Review>
+<Public Works Maintenance, connectedTo, Vehicle Registration>
+<Service Registration, connectedTo, Policy Drafting>
+<Service Registration, connectedTo, Urban Planning>
+<Urban Planning, connectedTo, Compliance Checking>
+<Vehicle Registration, connectedTo, Driver's License Renewal>
+<Vehicle Registration, researches, Open Government Data Initiative>
+<Veterans Affairs, connectedTo, Whistleblower Protection>
+<Whistleblower Protection, connectedTo, Budget Allocation>
+<Whistleblower Protection, connectedTo, Driver's License Renewal>
+<Whistleblower Protection, connectedTo, Public Works Maintenance>
diff --git a/test/mermaid/hard/mermaid_52.txt b/test/mermaid/hard/mermaid_52.txt
new file mode 100644
index 0000000000000000000000000000000000000000..08770dc528b599d29ed2abb16195d218d26a211b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_52.txt
@@ -0,0 +1,40 @@
+<Complaint Management, connectedTo, Order Fulfillment>
+<Complaint Management, partOf, Supply Chain Optimization>
+<Customer Engagement, yes, Supplier Payment>
+<Customer Survey, connectedTo, Promotion Planning>
+<Discount Application, connectedTo, Receipt Issuing>
+<Discount Application, partOf, Inventory Check>
+<Fitting Room Management, connectedTo, Supplier Coordination>
+<Fitting Room Management, connectedTo, Warehouse Picking>
+<Fitting Room Management, yes, Visual Merchandising>
+<Loss Prevention, connectedTo, Customer Engagement>
+<Order Fulfillment, partOf, Supply Chain Optimization>
+<Order Fulfillment, yes, Product Listing>
+<Product Listing, connectedTo, Complaint Management>
+<Product Listing, connectedTo, Security Tagging>
+<Product Listing, connectedTo, Warehouse Picking>
+<Promotion Planning, connectedTo, end>
+<Receipt Issuing, connectedTo, Sales Forecasting>
+<Receipt Issuing, partOf, Inventory Check>
+<Return Handling, connectedTo, Customer Survey>
+<Return Handling, connectedTo, Promotion Planning>
+<Return Handling, connectedTo, end>
+<Sales Forecasting, connectedTo, Staff Training>
+<Sales Forecasting, partOf, Inventory Check>
+<Security Tagging, connectedTo, Fitting Room Management>
+<Security Tagging, connectedTo, Visual Merchandising>
+<Staff Training, connectedTo, Return Handling>
+<Staff Training, partOf, Inventory Check>
+<Stock Replenishment, connectedTo, Return Handling>
+<Stock Replenishment, connectedTo, Visual Merchandising>
+<Supplier Coordination, connectedTo, Return Handling>
+<Supplier Coordination, connectedTo, Stock Replenishment>
+<Supplier Coordination, connectedTo, Visual Merchandising>
+<Supplier Payment, connectedTo, Customer Survey>
+<Supplier Payment, connectedTo, Promotion Planning>
+<Supplier Payment, yes, Return Handling>
+<Visual Merchandising, connectedTo, Warehouse Picking>
+<Warehouse Picking, connectedTo, Discount Application>
+<Warehouse Picking, connectedTo, Loss Prevention>
+<Warehouse Picking, no, Return Handling>
+<start, connectedTo, Product Listing>
diff --git a/test/mermaid/hard/mermaid_53.mmd b/test/mermaid/hard/mermaid_53.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..0317a8da2a1b6e98343124651b673ad264f42aa3
--- /dev/null
+++ b/test/mermaid/hard/mermaid_53.mmd
@@ -0,0 +1,83 @@
+graph TD
+    N0([start])
+    N1[[Customer Checkout]]
+    N2[(Product Listing)]
+    N3[/Curbside Delivery/]
+    N4[E_commerce Platform Integration]
+    N5[[Self_Checkout Assistance]]
+    N6[/Payment Processing/]
+    N7[Visual Merchandising]
+    N8[[Customer Engagement]]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    subgraph Supplier Coordination
+        nest0_0(Product Demonstration)
+        nest0_1[Barcode Scanning]
+        nest0_2(Order Fulfillment)
+    end
+    subgraph Vendor Managed Inventory
+        nest1_0([Staff Training])
+        nest1_1(Security Tagging)
+        nest1_2{Sales Forecasting}
+    end
+    N0 --> |yes| N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> |no| N5
+    N5 -.-> N6
+    N6 --> |no| N7
+    N7 -.-> N8
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N5 --> nest0_0
+    nest0_2 -.-> N4
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N4 -.-> |no| nest1_0
+    nest1_2 -.-> N3
+    N2 -.-> S0
+    S0 --> N7
+    S0 -.-> N6
+    N2 -.-> S1
+    S1 -.-> N4
+    S1 --> |yes| N8
+    S1 --> N6
+    S1 -.-> N7
+    N0 -.-> M0
+    N2 -.-> M0
+    N1 --> M0
+    M0 --> N4
+    style S0 fill:#DDCEDD,stroke:#AF56A6
+    style S1 fill:#F5F5F5,stroke:#BDBDBD
+    style M0 fill:#E1F5FE,stroke:#4FC3F7
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#4FC3F7,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#AF56A6,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_53.txt b/test/mermaid/hard/mermaid_53.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7e6b4e156a5d6b700cf0635c2b884f4c0cf85ea2
--- /dev/null
+++ b/test/mermaid/hard/mermaid_53.txt
@@ -0,0 +1,28 @@
+<Barcode Scanning, connectedTo, Order Fulfillment>
+<Barcode Scanning, partOf, Supplier Coordination>
+<Curbside Delivery, connectedTo, E_commerce Platform Integration>
+<Customer Checkout, connectedTo, E_commerce Platform Integration>
+<Customer Checkout, connectedTo, Product Listing>
+<E_commerce Platform Integration, no, Self_Checkout Assistance>
+<E_commerce Platform Integration, no, Staff Training>
+<Order Fulfillment, connectedTo, E_commerce Platform Integration>
+<Order Fulfillment, partOf, Supplier Coordination>
+<Payment Processing, no, Visual Merchandising>
+<Product Demonstration, connectedTo, Barcode Scanning>
+<Product Demonstration, partOf, Supplier Coordination>
+<Product Listing, connectedTo, Curbside Delivery>
+<Product Listing, connectedTo, E_commerce Platform Integration>
+<Product Listing, connectedTo, Payment Processing>
+<Product Listing, connectedTo, Visual Merchandising>
+<Product Listing, yes, Customer Engagement>
+<Sales Forecasting, connectedTo, Curbside Delivery>
+<Sales Forecasting, partOf, Vendor Managed Inventory>
+<Security Tagging, connectedTo, Sales Forecasting>
+<Security Tagging, partOf, Vendor Managed Inventory>
+<Self_Checkout Assistance, connectedTo, Payment Processing>
+<Self_Checkout Assistance, connectedTo, Product Demonstration>
+<Staff Training, connectedTo, Security Tagging>
+<Staff Training, partOf, Vendor Managed Inventory>
+<Visual Merchandising, connectedTo, Customer Engagement>
+<start, connectedTo, E_commerce Platform Integration>
+<start, yes, Customer Checkout>
diff --git a/test/mermaid/hard/mermaid_54.mmd b/test/mermaid/hard/mermaid_54.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..46b2a7adef23a48e85dd1d56246fa6396bfe21dc
--- /dev/null
+++ b/test/mermaid/hard/mermaid_54.mmd
@@ -0,0 +1,122 @@
+graph RL
+    N0([Shelf Restocking])
+    N1(Price Tagging)
+    N2[[Supplier Coordination]]
+    N3[Customer Checkout]
+    N4([Curbside Delivery])
+    N5(Customer Loyalty Analytics)
+    N6(Customer Engagement)
+    N7(Daily Report Generation)
+    N8{Complaint Management}
+    N9([Customer Survey])
+    N10[Fitting Room Management]
+    N11[[E_commerce Platform Integration]]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Stock Replenishment
+        nest0_0(Barcode Scanning)
+        nest0_1([Return Handling])
+        nest0_2[(Receipt Issuing)]
+        nest0_3(Point of Sale System Update)
+    end
+    subgraph Gift Wrapping
+        nest1_0[(Product Demonstration)]
+        nest1_1(Discount Application)
+        nest1_2(Visual Merchandising)
+        nest1_3([Shopping Cart Collection])
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 --> |secures| N5
+    N5 -.-> N6
+    N6 --> |arranges| N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N7 -.-> nest0_0
+    nest0_3 --> N1
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> |reports| nest1_2
+    nest1_2 -.-> nest1_3
+    N8 -.-> nest1_0
+    nest1_3 -.-> N9
+    N5 --> S0
+    S0 --> N9
+    S0 --> N10
+    S0 --> N8
+    N7 -.-> S1
+    S1 -.-> N10
+    S1 -.-> N11
+    N8 --> S2
+    S2 --> N10
+    S2 --> N11
+    N0 --> M1
+    N1 -.-> M1
+    M1 -.-> N4
+    style N0 fill:#F9FBE7,stroke:#DCE775
+    style N1 fill:#F5F5DC,stroke:#BCB88A
+    style N2 fill:#F5F5DC,stroke:#BCB88A
+    style N3 fill:#F5F5DC,stroke:#BCB88A
+    style N4 fill:#F5F5DC,stroke:#BCB88A
+    style N5 fill:#F9FBE7,stroke:#DCE775
+    style N6 fill:#D7CCC8,stroke:#795548
+    style N7 fill:#D7CCC8,stroke:#795548
+    style N8 fill:#F9FBE7,stroke:#DCE775
+    style N9 fill:#F9FBE7,stroke:#DCE775
+    style N10 fill:#D7CCC8,stroke:#795548
+    style N11 fill:#F9FBE7,stroke:#DCE775
+    style S0 fill:#F9FBE7,stroke:#DCE775
+    style S1 fill:#F9FBE7,stroke:#DCE775
+    style S2 fill:#D7CCC8,stroke:#795548
+    style M1 fill:#D7CCC8,stroke:#795548
+    style nest0_0 fill:#D7CCC8,stroke:#795548
+    style nest0_1 fill:#D7CCC8,stroke:#795548
+    style nest0_2 fill:#F9FBE7,stroke:#DCE775
+    style nest0_3 fill:#F5F5DC,stroke:#BCB88A
+    style nest1_0 fill:#F5F5DC,stroke:#BCB88A
+    style nest1_1 fill:#F5F5DC,stroke:#BCB88A
+    style nest1_2 fill:#D7CCC8,stroke:#795548
+    style nest1_3 fill:#F5F5DC,stroke:#BCB88A
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#795548,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#DCE775,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_55.mmd b/test/mermaid/hard/mermaid_55.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..bd0a2b1676310765af3063bd20fc82b6f66f6e28
--- /dev/null
+++ b/test/mermaid/hard/mermaid_55.mmd
@@ -0,0 +1,122 @@
+graph BT
+    N0([Assembly Line Setup])
+    N1[(Maintenance Scheduling)]
+    N2{Oil Change}
+    N3{Customer Test Drive}
+    N4[/Vehicle Connectivity/]
+    N5[Crash Simulation]
+    N6(Robotics in Production)
+    N7(Recall Management)
+    N8(Spare Parts Order)
+    N9([Road Testing])
+    N10([Software Calibration])
+    N11([Body Shop Repair])
+    N12([Tire Rotation])
+    N13([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    subgraph Engine Installation
+        nest0_0(Diagnostic Trouble Code Reading)
+        nest0_1[/Recycling of Vehicle Components/]
+    end
+    subgraph Research and Development
+        nest1_0[Brake System Check]
+        nest1_1[(Inventory Tracking)]
+        nest1_2(Dealership Sales)
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> |produces| N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> |delivers| N7
+    N7 -.-> |markets| N8
+    N8 --> |inspects| N9
+    N9 --> |automates| N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    nest0_0 --> |cleans| nest0_1
+    N4 -.-> nest0_0
+    nest0_1 --> N8
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N5 -.-> nest1_0
+    nest1_2 -.-> N3
+    N3 --> S0
+    S0 -.-> N7
+    S0 -.-> N10
+    N8 -.-> S1
+    S1 -.-> N10
+    S1 -.-> N11
+    S1 --> N13
+    S1 -.-> N12
+    N4 -.-> S2
+    S2 --> N13
+    S2 -.-> N7
+    S2 -.-> N10
+    N10 --> M0
+    N9 --> |complies| M0
+    M0 -.-> N13
+    style N0 fill:#EFE6FF,stroke:#C2B2F0
+    style N1 fill:#EFE6FF,stroke:#C2B2F0
+    style N2 fill:#E8F0EA,stroke:#92C79A
+    style N3 fill:#E8F0EA,stroke:#92C79A
+    style N4 fill:#EFE6FF,stroke:#C2B2F0
+    style N5 fill:#BBDEFB,stroke:#2196F3
+    style N6 fill:#EFE6FF,stroke:#C2B2F0
+    style N7 fill:#EFE6FF,stroke:#C2B2F0
+    style N8 fill:#EFE6FF,stroke:#C2B2F0
+    style N9 fill:#EFE6FF,stroke:#C2B2F0
+    style N10 fill:#BBDEFB,stroke:#2196F3
+    style N11 fill:#BBDEFB,stroke:#2196F3
+    style N12 fill:#EFE6FF,stroke:#C2B2F0
+    style N13 fill:#E8F0EA,stroke:#92C79A
+    style S0 fill:#E8F0EA,stroke:#92C79A
+    style S1 fill:#EFE6FF,stroke:#C2B2F0
+    style S2 fill:#EFE6FF,stroke:#C2B2F0
+    style M0 fill:#BBDEFB,stroke:#2196F3
+    style nest0_0 fill:#BBDEFB,stroke:#2196F3
+    style nest0_1 fill:#E8F0EA,stroke:#92C79A
+    style nest1_0 fill:#BBDEFB,stroke:#2196F3
+    style nest1_1 fill:#EFE6FF,stroke:#C2B2F0
+    style nest1_2 fill:#BBDEFB,stroke:#2196F3
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#92C79A,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#2196F3,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_55.txt b/test/mermaid/hard/mermaid_55.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0f2de4147687bd6377518c2d34bbf2ad16ff9921
--- /dev/null
+++ b/test/mermaid/hard/mermaid_55.txt
@@ -0,0 +1,36 @@
+<Assembly Line Setup, connectedTo, Maintenance Scheduling>
+<Body Shop Repair, connectedTo, Tire Rotation>
+<Brake System Check, connectedTo, Inventory Tracking>
+<Brake System Check, partOf, Research and Development>
+<Crash Simulation, connectedTo, Brake System Check>
+<Crash Simulation, connectedTo, Robotics in Production>
+<Customer Test Drive, connectedTo, Recall Management>
+<Customer Test Drive, connectedTo, Software Calibration>
+<Customer Test Drive, produces, Vehicle Connectivity>
+<Dealership Sales, connectedTo, Customer Test Drive>
+<Dealership Sales, partOf, Research and Development>
+<Diagnostic Trouble Code Reading, cleans, Recycling of Vehicle Components>
+<Diagnostic Trouble Code Reading, partOf, Engine Installation>
+<Inventory Tracking, connectedTo, Dealership Sales>
+<Inventory Tracking, partOf, Research and Development>
+<Maintenance Scheduling, connectedTo, Oil Change>
+<Oil Change, connectedTo, Customer Test Drive>
+<Recall Management, markets, Spare Parts Order>
+<Recycling of Vehicle Components, connectedTo, Spare Parts Order>
+<Recycling of Vehicle Components, partOf, Engine Installation>
+<Road Testing, automates, Software Calibration>
+<Road Testing, complies, end>
+<Robotics in Production, delivers, Recall Management>
+<Software Calibration, connectedTo, Body Shop Repair>
+<Software Calibration, connectedTo, end>
+<Spare Parts Order, connectedTo, Body Shop Repair>
+<Spare Parts Order, connectedTo, Software Calibration>
+<Spare Parts Order, connectedTo, Tire Rotation>
+<Spare Parts Order, connectedTo, end>
+<Spare Parts Order, inspects, Road Testing>
+<Tire Rotation, connectedTo, end>
+<Vehicle Connectivity, connectedTo, Crash Simulation>
+<Vehicle Connectivity, connectedTo, Diagnostic Trouble Code Reading>
+<Vehicle Connectivity, connectedTo, Recall Management>
+<Vehicle Connectivity, connectedTo, Software Calibration>
+<Vehicle Connectivity, connectedTo, end>
diff --git a/test/mermaid/hard/mermaid_56.mmd b/test/mermaid/hard/mermaid_56.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..3553e0518e7cae56d7e6e6f1c5a8eab421841ca1
--- /dev/null
+++ b/test/mermaid/hard/mermaid_56.mmd
@@ -0,0 +1,134 @@
+graph TD
+    N0([start])
+    N1[/Research and Development/]
+    N2(Warranty Activation)
+    N3[Tire Rotation]
+    N4[[Dealership Sales]]
+    N5([Paint Application])
+    N6[Vehicle Connectivity]
+    N7[Diagnostic Trouble Code Reading]
+    N8[[Infotainment System Integration]]
+    N9[Body Shop Repair]
+    N10[(Spare Parts Order)]
+    N11[(Software Calibration)]
+    N12[After_sales Service]
+    N13([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Customer Relationship Management
+        nest0_0([Electric Vehicle Battery Production])
+        nest0_1([Global Supply Chain Management])
+        nest0_2[(Maintenance Scheduling)]
+        nest0_3[Fuel Efficiency Check]
+    end
+    subgraph Road Testing
+        nest1_0[Parts Distribution]
+        nest1_1{Vehicle Design}
+        nest1_2[/Supplier Selection/]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> |validates| N7
+    N7 -.-> |upgrades| N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> N12
+    N12 --> N13
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N12 --> nest0_0
+    nest0_3 --> N13
+    nest1_0 -.-> |leases| nest1_1
+    nest1_1 -.-> |markets| nest1_2
+    N2 --> nest1_0
+    nest1_2 --> N6
+    N4 --> S0
+    S0 -.-> N8
+    S0 --> N9
+    S0 -.-> N11
+    S0 -.-> N13
+    N7 -.-> S1
+    S1 -.-> N13
+    S1 --> N10
+    S1 --> N9
+    N0 --> S2
+    S2 --> N3
+    S2 --> N10
+    S2 --> N5
+    S2 -.-> N9
+    N3 --> M1
+    N2 -.-> |installs| M1
+    M1 --> N6
+    style N0 fill:#F3E5F5,stroke:#AB47BC
+    style N1 fill:#F3E5F5,stroke:#AB47BC
+    style N2 fill:#ECCFF5,stroke:#CD8FF2
+    style N3 fill:#FBE9E7,stroke:#FF8A65
+    style N4 fill:#FBE9E7,stroke:#FF8A65
+    style N5 fill:#F3E5F5,stroke:#AB47BC
+    style N6 fill:#FBE9E7,stroke:#FF8A65
+    style N7 fill:#F3E5F5,stroke:#AB47BC
+    style N8 fill:#ECCFF5,stroke:#CD8FF2
+    style N9 fill:#ECCFF5,stroke:#CD8FF2
+    style N10 fill:#F3E5F5,stroke:#AB47BC
+    style N11 fill:#F3E5F5,stroke:#AB47BC
+    style N12 fill:#F3E5F5,stroke:#AB47BC
+    style N13 fill:#FBE9E7,stroke:#FF8A65
+    style S0 fill:#FBE9E7,stroke:#FF8A65
+    style S1 fill:#FBE9E7,stroke:#FF8A65
+    style S2 fill:#ECCFF5,stroke:#CD8FF2
+    style M1 fill:#FBE9E7,stroke:#FF8A65
+    style nest0_0 fill:#ECCFF5,stroke:#CD8FF2
+    style nest0_1 fill:#FBE9E7,stroke:#FF8A65
+    style nest0_2 fill:#ECCFF5,stroke:#CD8FF2
+    style nest0_3 fill:#ECCFF5,stroke:#CD8FF2
+    style nest1_0 fill:#F3E5F5,stroke:#AB47BC
+    style nest1_1 fill:#F3E5F5,stroke:#AB47BC
+    style nest1_2 fill:#F3E5F5,stroke:#AB47BC
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#AB47BC,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_57.mmd b/test/mermaid/hard/mermaid_57.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..cafa7f7c260bb90bbd7a398314fd99fe248fd50f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_57.mmd
@@ -0,0 +1,138 @@
+graph RL
+    N0([Component Testing])
+    N1[/Software Calibration/]
+    N2(Customer Test Drive)
+    N3([Road Testing])
+    N4([Brake System Check])
+    N5[Spare Parts Order]
+    N6[(Body Shop Repair)]
+    N7[Fluid Level Check]
+    N8[(Fuel Efficiency Check)]
+    N9[[Research and Development]]
+    N10(After_sales Service)
+    N11[(Engine Installation)]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Recall Management
+        nest0_0[Paint Application]
+        nest0_1{Vehicle Registration}
+        nest0_2[/Vehicle Financing/]
+    end
+    subgraph Emission Testing
+        nest1_0[[Autonomous Driving Software Development]]
+        nest1_1[(Quality Assurance)]
+        nest1_2{Assembly Line Setup}
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> |optimizes| N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    N3 --> |sells| nest0_0
+    nest0_2 -.-> N3
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N9 --> nest1_0
+    nest1_2 --> N5
+    N1 --> S0
+    S0 -.-> N7
+    S0 --> N3
+    N2 -.-> S1
+    S1 -.-> N5
+    S1 -.-> N9
+    S1 -.-> N7
+    S1 -.-> N6
+    N6 --> S2
+    S2 --> N11
+    S2 -.-> N8
+    S2 --> |calibrates| N10
+    N0 -.-> M0
+    N6 --> M0
+    N4 -.-> M0
+    N5 -.-> M0
+    M0 -.-> N11
+    N1 --> |supports| M1
+    N3 -.-> M1
+    M1 -.-> N9
+    N0 -.-> M2
+    N1 --> M2
+    M2 -.-> N3
+    style N0 fill:#FFFAE0,stroke:#FFE470
+    style N1 fill:#C8EDFF,stroke:#82DAFF
+    style N2 fill:#C8EDFF,stroke:#82DAFF
+    style N3 fill:#C8EDFF,stroke:#82DAFF
+    style N4 fill:#FFFAE0,stroke:#FFE470
+    style N5 fill:#FFFAE0,stroke:#FFE470
+    style N6 fill:#C8EDFF,stroke:#82DAFF
+    style N7 fill:#D0E0F8,stroke:#4285F4
+    style N8 fill:#C8EDFF,stroke:#82DAFF
+    style N9 fill:#D0E0F8,stroke:#4285F4
+    style N10 fill:#C8EDFF,stroke:#82DAFF
+    style N11 fill:#C8EDFF,stroke:#82DAFF
+    style S0 fill:#C8EDFF,stroke:#82DAFF
+    style S1 fill:#C8EDFF,stroke:#82DAFF
+    style S2 fill:#D0E0F8,stroke:#4285F4
+    style M0 fill:#FFFAE0,stroke:#FFE470
+    style M1 fill:#FFFAE0,stroke:#FFE470
+    style M2 fill:#FFFAE0,stroke:#FFE470
+    style nest0_0 fill:#FFFAE0,stroke:#FFE470
+    style nest0_1 fill:#FFFAE0,stroke:#FFE470
+    style nest0_2 fill:#D0E0F8,stroke:#4285F4
+    style nest1_0 fill:#C8EDFF,stroke:#82DAFF
+    style nest1_1 fill:#D0E0F8,stroke:#4285F4
+    style nest1_2 fill:#D0E0F8,stroke:#4285F4
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#82DAFF,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_58.mmd b/test/mermaid/hard/mermaid_58.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..143439f244a2d6979f52af9f806227424a25085d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_58.mmd
@@ -0,0 +1,138 @@
+graph RL
+    N0([start])
+    N1([Structural Analysis])
+    N2(Launch Window Calculation)
+    N3[(Hypersonic Flight Testing)]
+    N4[(Orbit Adjustment)]
+    N5(Ground Station Coordination)
+    N6[Mission Planning]
+    N7[[Space Debris Tracking]]
+    N8[(Drone System Development)]
+    N9[Aircraft Maintenance Log]
+    N10(Emergency Protocols)
+    N11[[Fueling Procedure]]
+    N12[[Satellite Configuration]]
+    N13([Thermal Shield Testing])
+    N14[/Telemetry Setup/]
+    N15(Rocket Stage Separation)
+    N16([end])
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Flight Crew Training
+        nest0_0[International Space Station Resupply]
+        nest0_1[Satellite Data Processing]
+        nest0_2([Flight Simulation])
+    end
+    subgraph Engine Overhaul
+        nest1_0(Mission Debriefing)
+        nest1_1[Airframe Assembly]
+        nest1_2(Astronaut Training)
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> |certifies| N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 --> N13
+    N13 --> N14
+    N14 --> N15
+    N15 --> N16
+    nest0_0 --> nest0_1
+    nest0_1 -.-> |plans| nest0_2
+    N5 -.-> nest0_0
+    nest0_2 -.-> N7
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N10 -.-> nest1_0
+    nest1_2 --> N14
+    N2 -.-> S1
+    S1 --> N12
+    S1 --> N16
+    S1 --> N13
+    N10 -.-> S2
+    S2 -.-> N14
+    S2 -.-> N15
+    N11 -.-> M0
+    N0 --> M0
+    N13 --> M0
+    M0 --> N16
+    N2 --> M1
+    N1 -.-> M1
+    N4 --> M1
+    M1 --> N8
+    style N0 fill:#FFF3E0,stroke:#FFA726
+    style N1 fill:#FFF3E0,stroke:#FFA726
+    style N2 fill:#FFF3E0,stroke:#FFA726
+    style N3 fill:#FFF0CC,stroke:#FFCC80
+    style N4 fill:#FFF3E0,stroke:#FFA726
+    style N5 fill:#FFF3E0,stroke:#FFA726
+    style N6 fill:#FFE88D,stroke:#FFDA4E
+    style N7 fill:#FFF3E0,stroke:#FFA726
+    style N8 fill:#FFE88D,stroke:#FFDA4E
+    style N9 fill:#FFE88D,stroke:#FFDA4E
+    style N10 fill:#FFF3E0,stroke:#FFA726
+    style N11 fill:#FFE88D,stroke:#FFDA4E
+    style N12 fill:#FFF3E0,stroke:#FFA726
+    style N13 fill:#FFF0CC,stroke:#FFCC80
+    style N14 fill:#FFE88D,stroke:#FFDA4E
+    style N15 fill:#FFF3E0,stroke:#FFA726
+    style N16 fill:#FFE88D,stroke:#FFDA4E
+    style S1 fill:#FFF3E0,stroke:#FFA726
+    style S2 fill:#FFF0CC,stroke:#FFCC80
+    style M0 fill:#FFF3E0,stroke:#FFA726
+    style M1 fill:#FFF3E0,stroke:#FFA726
+    style nest0_0 fill:#FFF0CC,stroke:#FFCC80
+    style nest0_1 fill:#FFE88D,stroke:#FFDA4E
+    style nest0_2 fill:#FFF3E0,stroke:#FFA726
+    style nest1_0 fill:#FFF0CC,stroke:#FFCC80
+    style nest1_1 fill:#FFE88D,stroke:#FFDA4E
+    style nest1_2 fill:#FFE88D,stroke:#FFDA4E
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFA726,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#FFA726,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_58.txt b/test/mermaid/hard/mermaid_58.txt
new file mode 100644
index 0000000000000000000000000000000000000000..fbae361ef8ff2e592bc91d23fcd8c194ae08c64c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_58.txt
@@ -0,0 +1,41 @@
+<Aircraft Maintenance Log, certifies, Emergency Protocols>
+<Airframe Assembly, connectedTo, Astronaut Training>
+<Airframe Assembly, partOf, Engine Overhaul>
+<Astronaut Training, connectedTo, Telemetry Setup>
+<Astronaut Training, partOf, Engine Overhaul>
+<Drone System Development, connectedTo, Aircraft Maintenance Log>
+<Emergency Protocols, connectedTo, Fueling Procedure>
+<Emergency Protocols, connectedTo, Mission Debriefing>
+<Emergency Protocols, connectedTo, Rocket Stage Separation>
+<Emergency Protocols, connectedTo, Telemetry Setup>
+<Flight Simulation, connectedTo, Space Debris Tracking>
+<Flight Simulation, partOf, Flight Crew Training>
+<Fueling Procedure, connectedTo, Satellite Configuration>
+<Fueling Procedure, connectedTo, end>
+<Ground Station Coordination, connectedTo, International Space Station Resupply>
+<Ground Station Coordination, connectedTo, Mission Planning>
+<Hypersonic Flight Testing, connectedTo, Orbit Adjustment>
+<International Space Station Resupply, connectedTo, Satellite Data Processing>
+<International Space Station Resupply, partOf, Flight Crew Training>
+<Launch Window Calculation, connectedTo, Drone System Development>
+<Launch Window Calculation, connectedTo, Hypersonic Flight Testing>
+<Launch Window Calculation, connectedTo, Satellite Configuration>
+<Launch Window Calculation, connectedTo, Thermal Shield Testing>
+<Launch Window Calculation, connectedTo, end>
+<Mission Debriefing, connectedTo, Airframe Assembly>
+<Mission Debriefing, partOf, Engine Overhaul>
+<Mission Planning, connectedTo, Space Debris Tracking>
+<Orbit Adjustment, connectedTo, Drone System Development>
+<Orbit Adjustment, connectedTo, Ground Station Coordination>
+<Rocket Stage Separation, connectedTo, end>
+<Satellite Configuration, connectedTo, Thermal Shield Testing>
+<Satellite Data Processing, partOf, Flight Crew Training>
+<Satellite Data Processing, plans, Flight Simulation>
+<Space Debris Tracking, connectedTo, Drone System Development>
+<Structural Analysis, connectedTo, Drone System Development>
+<Structural Analysis, connectedTo, Launch Window Calculation>
+<Telemetry Setup, connectedTo, Rocket Stage Separation>
+<Thermal Shield Testing, connectedTo, Telemetry Setup>
+<Thermal Shield Testing, connectedTo, end>
+<start, connectedTo, Structural Analysis>
+<start, connectedTo, end>
diff --git a/test/mermaid/hard/mermaid_59.txt b/test/mermaid/hard/mermaid_59.txt
new file mode 100644
index 0000000000000000000000000000000000000000..13a8ed62df92849d0217b4d9bd8af092dfa161b0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_59.txt
@@ -0,0 +1,42 @@
+<Aircraft Maintenance Log, controls, Drone System Development>
+<Aircraft Manufacturing, connectedTo, Fueling Procedure>
+<Aircraft Manufacturing, connectedTo, Telemetry Setup>
+<Astronaut Training, connectedTo, Orbit Adjustment>
+<Astronaut Training, partOf, Aviation Safety Audit>
+<Drone System Development, executes, end>
+<Emergency Protocols, connectedTo, Engine Overhaul>
+<Engine Overhaul, connectedTo, Payload Integration>
+<Extravehicular Activity Planning, connectedTo, Structural Analysis>
+<Flight Crew Training, connectedTo, Aircraft Maintenance Log>
+<Fueling Procedure, navigates, Emergency Protocols>
+<International Space Station Resupply, connectedTo, Space Debris Tracking>
+<International Space Station Resupply, partOf, Aviation Safety Audit>
+<Launch Window Calculation, connectedTo, New Material Development>
+<Launch Window Calculation, partOf, Data Transmission>
+<New Material Development, connectedTo, Rocket Assembly>
+<New Material Development, partOf, Data Transmission>
+<Orbit Adjustment, connectedTo, Engine Overhaul>
+<Orbit Adjustment, connectedTo, Extravehicular Activity Planning>
+<Orbit Adjustment, connectedTo, Runway Inspection>
+<Payload Integration, connectedTo, Propulsion Testing>
+<Propulsion Testing, connectedTo, Flight Crew Training>
+<Rocket Assembly, connectedTo, Extravehicular Activity Planning>
+<Rocket Assembly, partOf, Data Transmission>
+<Rocket Stage Separation, connectedTo, Aircraft Manufacturing>
+<Rocket Stage Separation, connectedTo, Engine Overhaul>
+<Rocket Stage Separation, monitors, Satellite Configuration>
+<Runway Inspection, connectedTo, Launch Window Calculation>
+<Runway Inspection, partOf, Data Transmission>
+<Satellite Configuration, connectedTo, Aircraft Maintenance Log>
+<Satellite Configuration, connectedTo, Aircraft Manufacturing>
+<Satellite Configuration, connectedTo, Flight Crew Training>
+<Satellite Configuration, connectedTo, Fueling Procedure>
+<Satellite Configuration, connectedTo, end>
+<Space Debris Tracking, connectedTo, Astronaut Training>
+<Space Debris Tracking, partOf, Aviation Safety Audit>
+<Structural Analysis, connectedTo, Engine Overhaul>
+<Structural Analysis, connectedTo, Rocket Stage Separation>
+<Telemetry Setup, connectedTo, International Space Station Resupply>
+<Telemetry Setup, partOf, Aviation Safety Audit>
+<start, connectedTo, Engine Overhaul>
+<start, connectedTo, Orbit Adjustment>
diff --git a/test/mermaid/hard/mermaid_6.mmd b/test/mermaid/hard/mermaid_6.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..97ddb918e058e7aeeab2ba565f0da7942c003568
--- /dev/null
+++ b/test/mermaid/hard/mermaid_6.mmd
@@ -0,0 +1,130 @@
+graph TD
+    N0([start])
+    N1[[Pain Management]]
+    N2[[Imaging Scan]]
+    N3(Mental Health Assessment)
+    N4[Allergy Test]
+    N5[(Rehabilitation Therapy)]
+    N6{Lab Test}
+    N7(Home Care Visit)
+    N8[(Blood Test)]
+    N9[(Follow_up)]
+    N10[(Patient Intake)]
+    N11[Surgery]
+    N12(Insurance Claim)
+    N13([Device Implantation])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Dental Check_up
+        nest0_0[/Genetic Counseling/]
+        nest0_1[Medical History]
+    end
+    subgraph Prescription
+        nest1_0(Anesthesia Administration)
+        nest1_1[/Vaccination/]
+        nest1_2[Treatment Plan]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> |transports| N9
+    N9 -.-> |escalates| N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 --> |monitors| N13
+    nest0_0 -.-> nest0_1
+    N3 --> nest0_0
+    nest0_1 --> N10
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N8 -.-> |verifies| nest1_0
+    nest1_2 -.-> N2
+    N4 --> S0
+    S0 -.-> N11
+    S0 --> N12
+    N4 -.-> S1
+    S1 --> N8
+    S1 -.-> N12
+    S1 --> N9
+    N4 -.-> S2
+    S2 -.-> N7
+    S2 -.-> N11
+    S2 -.-> |dispenses| N10
+    N1 --> M0
+    N0 -.-> M0
+    N2 --> M0
+    M0 -.-> N4
+    N1 --> M1
+    N2 --> M1
+    M1 --> N7
+    style N0 fill:#FCFCE7,stroke:#DCE775
+    style N1 fill:#CADEDE,stroke:#94C0C0
+    style N2 fill:#FCFCE7,stroke:#DCE775
+    style N3 fill:#CADEDE,stroke:#94C0C0
+    style N4 fill:#B2EBF2,stroke:#00BCD4
+    style N5 fill:#CADEDE,stroke:#94C0C0
+    style N6 fill:#CADEDE,stroke:#94C0C0
+    style N7 fill:#FCFCE7,stroke:#DCE775
+    style N8 fill:#B2EBF2,stroke:#00BCD4
+    style N9 fill:#CADEDE,stroke:#94C0C0
+    style N10 fill:#FCFCE7,stroke:#DCE775
+    style N11 fill:#FCFCE7,stroke:#DCE775
+    style N12 fill:#FCFCE7,stroke:#DCE775
+    style N13 fill:#FCFCE7,stroke:#DCE775
+    style S0 fill:#CADEDE,stroke:#94C0C0
+    style S1 fill:#FCFCE7,stroke:#DCE775
+    style S2 fill:#CADEDE,stroke:#94C0C0
+    style M0 fill:#CADEDE,stroke:#94C0C0
+    style M1 fill:#CADEDE,stroke:#94C0C0
+    style nest0_0 fill:#CADEDE,stroke:#94C0C0
+    style nest0_1 fill:#CADEDE,stroke:#94C0C0
+    style nest1_0 fill:#FCFCE7,stroke:#DCE775
+    style nest1_1 fill:#B2EBF2,stroke:#00BCD4
+    style nest1_2 fill:#B2EBF2,stroke:#00BCD4
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#94C0C0,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_6.txt b/test/mermaid/hard/mermaid_6.txt
new file mode 100644
index 0000000000000000000000000000000000000000..1eac9e3d3f213d7f830466029d782aa2e600b3d8
--- /dev/null
+++ b/test/mermaid/hard/mermaid_6.txt
@@ -0,0 +1,36 @@
+<Allergy Test, connectedTo, Blood Test>
+<Allergy Test, connectedTo, Follow_up>
+<Allergy Test, connectedTo, Home Care Visit>
+<Allergy Test, connectedTo, Insurance Claim>
+<Allergy Test, connectedTo, Rehabilitation Therapy>
+<Allergy Test, connectedTo, Surgery>
+<Allergy Test, dispenses, Patient Intake>
+<Anesthesia Administration, connectedTo, Vaccination>
+<Anesthesia Administration, partOf, Prescription>
+<Blood Test, transports, Follow_up>
+<Blood Test, verifies, Anesthesia Administration>
+<Follow_up, escalates, Patient Intake>
+<Genetic Counseling, connectedTo, Medical History>
+<Genetic Counseling, partOf, Dental Check_up>
+<Home Care Visit, connectedTo, Blood Test>
+<Imaging Scan, connectedTo, Allergy Test>
+<Imaging Scan, connectedTo, Home Care Visit>
+<Imaging Scan, connectedTo, Mental Health Assessment>
+<Insurance Claim, monitors, Device Implantation>
+<Lab Test, connectedTo, Home Care Visit>
+<Medical History, connectedTo, Patient Intake>
+<Medical History, partOf, Dental Check_up>
+<Mental Health Assessment, connectedTo, Allergy Test>
+<Mental Health Assessment, connectedTo, Genetic Counseling>
+<Pain Management, connectedTo, Allergy Test>
+<Pain Management, connectedTo, Home Care Visit>
+<Pain Management, connectedTo, Imaging Scan>
+<Patient Intake, connectedTo, Surgery>
+<Rehabilitation Therapy, connectedTo, Lab Test>
+<Surgery, connectedTo, Insurance Claim>
+<Treatment Plan, connectedTo, Imaging Scan>
+<Treatment Plan, partOf, Prescription>
+<Vaccination, connectedTo, Treatment Plan>
+<Vaccination, partOf, Prescription>
+<start, connectedTo, Allergy Test>
+<start, connectedTo, Pain Management>
diff --git a/test/mermaid/hard/mermaid_60.mmd b/test/mermaid/hard/mermaid_60.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..7d4944d6d1c46d28457570ae7729e2344be9bc05
--- /dev/null
+++ b/test/mermaid/hard/mermaid_60.mmd
@@ -0,0 +1,87 @@
+graph BT
+    N0([start])
+    N1[Aircraft Maintenance Log]
+    N2[/Launch Execution/]
+    N3{Telemetry Setup}
+    N4{Orbit Adjustment}
+    N5[[Avionics Installation]]
+    N6[(Flight Simulation)]
+    N7[Launch Window Calculation]
+    N8[(Aviation Safety Audit)]
+    N9[/Flight Crew Training/]
+    N10[[System Reboot]]
+    S0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Airframe Assembly
+        nest0_0[/Mission Planning/]
+        nest0_1(Air Traffic Control Integration)
+    end
+    subgraph Extravehicular Activity Planning
+        nest1_0(Ground Station Coordination)
+        nest1_1{Aircraft Manufacturing}
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> |yes| N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> N10
+    nest0_0 --> |no| nest0_1
+    N5 -.-> nest0_0
+    nest0_1 -.-> N8
+    nest1_0 -.-> nest1_1
+    N3 -.-> nest1_0
+    nest1_1 --> N1
+    N4 --> S0
+    S0 --> N6
+    S0 --> N7
+    S0 -.-> N8
+    S0 --> N9
+    N0 -.-> M1
+    N1 --> M1
+    N2 --> M1
+    M1 --> N4
+    N1 --> M2
+    N4 -.-> M2
+    N3 --> M2
+    N2 --> M2
+    M2 -.-> N8
+    style S0 fill:#FFFDE0,stroke:#FFF8A6
+    style M1 fill:#FFFDE0,stroke:#FFF8A6
+    style M2 fill:#ECEFF1,stroke:#90A4AE
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#4285F4,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_60.txt b/test/mermaid/hard/mermaid_60.txt
new file mode 100644
index 0000000000000000000000000000000000000000..3cf727b76fa5471a9698af85b548e3792e9b7b29
--- /dev/null
+++ b/test/mermaid/hard/mermaid_60.txt
@@ -0,0 +1,30 @@
+<Air Traffic Control Integration, connectedTo, Aviation Safety Audit>
+<Air Traffic Control Integration, partOf, Airframe Assembly>
+<Aircraft Maintenance Log, connectedTo, Aviation Safety Audit>
+<Aircraft Maintenance Log, connectedTo, Launch Execution>
+<Aircraft Maintenance Log, connectedTo, Orbit Adjustment>
+<Aircraft Manufacturing, connectedTo, Aircraft Maintenance Log>
+<Aircraft Manufacturing, partOf, Extravehicular Activity Planning>
+<Aviation Safety Audit, connectedTo, Flight Crew Training>
+<Avionics Installation, connectedTo, Flight Simulation>
+<Avionics Installation, connectedTo, Mission Planning>
+<Flight Crew Training, connectedTo, System Reboot>
+<Flight Simulation, yes, Launch Window Calculation>
+<Ground Station Coordination, connectedTo, Aircraft Manufacturing>
+<Ground Station Coordination, partOf, Extravehicular Activity Planning>
+<Launch Execution, connectedTo, Aviation Safety Audit>
+<Launch Execution, connectedTo, Orbit Adjustment>
+<Launch Execution, connectedTo, Telemetry Setup>
+<Launch Window Calculation, connectedTo, Aviation Safety Audit>
+<Mission Planning, no, Air Traffic Control Integration>
+<Mission Planning, partOf, Airframe Assembly>
+<Orbit Adjustment, connectedTo, Aviation Safety Audit>
+<Orbit Adjustment, connectedTo, Avionics Installation>
+<Orbit Adjustment, connectedTo, Flight Crew Training>
+<Orbit Adjustment, connectedTo, Flight Simulation>
+<Orbit Adjustment, connectedTo, Launch Window Calculation>
+<Telemetry Setup, connectedTo, Aviation Safety Audit>
+<Telemetry Setup, connectedTo, Ground Station Coordination>
+<Telemetry Setup, connectedTo, Orbit Adjustment>
+<start, connectedTo, Aircraft Maintenance Log>
+<start, connectedTo, Orbit Adjustment>
diff --git a/test/mermaid/hard/mermaid_61.mmd b/test/mermaid/hard/mermaid_61.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..59a23cf9bf041cc2b989b1012488218863d34ac3
--- /dev/null
+++ b/test/mermaid/hard/mermaid_61.mmd
@@ -0,0 +1,85 @@
+graph LR
+    N0([start])
+    N1[Market Research]
+    N2([Underwriting])
+    N3[Fraud Investigation]
+    N4[/Cyber Insurance Policy/]
+    N5[(Customer Communication)]
+    N6[(Actuarial Analysis)]
+    N7(Product Development)
+    N8[[Coverage Review]]
+    N9[Digital Policy Management]
+    N10[Policy Issuance]
+    N11(Data Security)
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Auto Accident Claims
+        nest0_0{Life Insurance Underwriting}
+        nest0_1(Broker Management)
+        nest0_2[[Healthcare Provider Network Management]]
+    end
+    subgraph Customer Support
+        nest1_0(Policy Renewal)
+        nest1_1[Subrogation]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> |no| N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    nest0_0 --> |no| nest0_1
+    nest0_1 -.-> |no| nest0_2
+    N4 --> nest0_0
+    nest0_2 -.-> N1
+    nest1_0 --> nest1_1
+    N9 -.-> nest1_0
+    nest1_1 -.-> N11
+    N0 -.-> S1
+    S1 -.-> N8
+    S1 --> N5
+    N1 --> M0
+    N0 --> M0
+    M0 -.-> N3
+    N0 -.-> M1
+    N1 -.-> M1
+    N2 -.-> M1
+    M1 -.-> N4
+    style S1 fill:#C5CAE9,stroke:#3F51B5
+    style M0 fill:#C5CAE9,stroke:#3F51B5
+    style M1 fill:#FCFCE7,stroke:#DCE775
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#DCE775,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_61.txt b/test/mermaid/hard/mermaid_61.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ff2382b591633136ca73117ad5c1b79d58347b38
--- /dev/null
+++ b/test/mermaid/hard/mermaid_61.txt
@@ -0,0 +1,30 @@
+<Actuarial Analysis, connectedTo, Product Development>
+<Broker Management, no, Healthcare Provider Network Management>
+<Broker Management, partOf, Auto Accident Claims>
+<Coverage Review, connectedTo, Digital Policy Management>
+<Customer Communication, connectedTo, Actuarial Analysis>
+<Cyber Insurance Policy, connectedTo, Life Insurance Underwriting>
+<Cyber Insurance Policy, no, Customer Communication>
+<Digital Policy Management, connectedTo, Policy Issuance>
+<Digital Policy Management, connectedTo, Policy Renewal>
+<Fraud Investigation, connectedTo, Cyber Insurance Policy>
+<Healthcare Provider Network Management, connectedTo, Market Research>
+<Healthcare Provider Network Management, partOf, Auto Accident Claims>
+<Life Insurance Underwriting, no, Broker Management>
+<Life Insurance Underwriting, partOf, Auto Accident Claims>
+<Market Research, connectedTo, Cyber Insurance Policy>
+<Market Research, connectedTo, Fraud Investigation>
+<Market Research, connectedTo, Underwriting>
+<Policy Issuance, connectedTo, Data Security>
+<Policy Renewal, connectedTo, Subrogation>
+<Policy Renewal, partOf, Customer Support>
+<Product Development, connectedTo, Coverage Review>
+<Subrogation, connectedTo, Data Security>
+<Subrogation, partOf, Customer Support>
+<Underwriting, connectedTo, Cyber Insurance Policy>
+<Underwriting, connectedTo, Fraud Investigation>
+<start, connectedTo, Coverage Review>
+<start, connectedTo, Customer Communication>
+<start, connectedTo, Cyber Insurance Policy>
+<start, connectedTo, Fraud Investigation>
+<start, connectedTo, Market Research>
diff --git a/test/mermaid/hard/mermaid_63.mmd b/test/mermaid/hard/mermaid_63.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..db3880077d276e19c6a4254e7315c50a44e2885b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_63.mmd
@@ -0,0 +1,132 @@
+graph TD
+    N0([start])
+    N1{Life Insurance Underwriting}
+    N2[[Auto Accident Claims]]
+    N3([Policy Cancellation])
+    N4(Underwriting)
+    N5[(Payment Processing)]
+    N6(Third_Party Administrator Liaison)
+    N7[Catastrophe Modeling]
+    N8([Actuarial Analysis])
+    N9([Broker Management])
+    N10{Loss Prevention}
+    N11(Data Security)
+    N12[/Reinsurance Negotiation/]
+    N13[Claim Submission]
+    S0(( ))
+    S1(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Fraud Investigation
+        nest0_0{Annuity Sales}
+        nest0_1([Claims Litigation Management])
+        nest0_2[/Legal Review of Claims/]
+        nest0_3[[Agent Training]]
+    end
+    subgraph Coverage Review
+        nest1_0(Market Research)
+        nest1_1(Healthcare Provider Network Management)
+        nest1_2{Cyber Insurance Policy}
+        nest1_3[/Claim Adjustment/]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 --> |promotes| N12
+    N12 --> N13
+    nest0_0 -.-> |integrates| nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N12 --> nest0_0
+    nest0_3 -.-> N10
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 -.-> nest1_3
+    N12 --> nest1_0
+    nest1_3 --> N13
+    N3 -.-> S0
+    S0 --> N10
+    S0 --> N7
+    S0 -.-> N6
+    N3 --> S1
+    S1 --> N13
+    S1 --> N7
+    N0 -.-> M1
+    N2 -.-> |models| M1
+    M1 --> N5
+    N3 --> M2
+    N2 -.-> M2
+    N4 -.-> M2
+    M2 --> N6
+    style N0 fill:#D3F7F9,stroke:#80DDEA
+    style N1 fill:#DACBE3,stroke:#A188D0
+    style N2 fill:#CADEDE,stroke:#94C0C0
+    style N3 fill:#DACBE3,stroke:#A188D0
+    style N4 fill:#CADEDE,stroke:#94C0C0
+    style N5 fill:#D3F7F9,stroke:#80DDEA
+    style N6 fill:#DACBE3,stroke:#A188D0
+    style N7 fill:#DACBE3,stroke:#A188D0
+    style N8 fill:#DACBE3,stroke:#A188D0
+    style N9 fill:#DACBE3,stroke:#A188D0
+    style N10 fill:#CADEDE,stroke:#94C0C0
+    style N11 fill:#CADEDE,stroke:#94C0C0
+    style N12 fill:#CADEDE,stroke:#94C0C0
+    style N13 fill:#DACBE3,stroke:#A188D0
+    style S0 fill:#CADEDE,stroke:#94C0C0
+    style S1 fill:#CADEDE,stroke:#94C0C0
+    style M1 fill:#DACBE3,stroke:#A188D0
+    style M2 fill:#D3F7F9,stroke:#80DDEA
+    style nest0_0 fill:#DACBE3,stroke:#A188D0
+    style nest0_1 fill:#D3F7F9,stroke:#80DDEA
+    style nest0_2 fill:#DACBE3,stroke:#A188D0
+    style nest0_3 fill:#DACBE3,stroke:#A188D0
+    style nest1_0 fill:#D3F7F9,stroke:#80DDEA
+    style nest1_1 fill:#DACBE3,stroke:#A188D0
+    style nest1_2 fill:#D3F7F9,stroke:#80DDEA
+    style nest1_3 fill:#CADEDE,stroke:#94C0C0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#94C0C0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#80DDEA,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_63.txt b/test/mermaid/hard/mermaid_63.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e258c95fdbbb421bf201f186c8077f6d885c7d7f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_63.txt
@@ -0,0 +1,39 @@
+<Actuarial Analysis, connectedTo, Broker Management>
+<Agent Training, connectedTo, Loss Prevention>
+<Agent Training, partOf, Fraud Investigation>
+<Annuity Sales, integrates, Claims Litigation Management>
+<Annuity Sales, partOf, Fraud Investigation>
+<Auto Accident Claims, connectedTo, Policy Cancellation>
+<Auto Accident Claims, connectedTo, Third_Party Administrator Liaison>
+<Auto Accident Claims, models, Payment Processing>
+<Broker Management, connectedTo, Loss Prevention>
+<Catastrophe Modeling, connectedTo, Actuarial Analysis>
+<Claim Adjustment, connectedTo, Claim Submission>
+<Claim Adjustment, partOf, Coverage Review>
+<Claims Litigation Management, connectedTo, Legal Review of Claims>
+<Claims Litigation Management, partOf, Fraud Investigation>
+<Cyber Insurance Policy, connectedTo, Claim Adjustment>
+<Cyber Insurance Policy, partOf, Coverage Review>
+<Data Security, promotes, Reinsurance Negotiation>
+<Healthcare Provider Network Management, connectedTo, Cyber Insurance Policy>
+<Healthcare Provider Network Management, partOf, Coverage Review>
+<Legal Review of Claims, connectedTo, Agent Training>
+<Legal Review of Claims, partOf, Fraud Investigation>
+<Life Insurance Underwriting, connectedTo, Auto Accident Claims>
+<Loss Prevention, connectedTo, Data Security>
+<Market Research, connectedTo, Healthcare Provider Network Management>
+<Market Research, partOf, Coverage Review>
+<Payment Processing, connectedTo, Third_Party Administrator Liaison>
+<Policy Cancellation, connectedTo, Catastrophe Modeling>
+<Policy Cancellation, connectedTo, Claim Submission>
+<Policy Cancellation, connectedTo, Loss Prevention>
+<Policy Cancellation, connectedTo, Third_Party Administrator Liaison>
+<Policy Cancellation, connectedTo, Underwriting>
+<Reinsurance Negotiation, connectedTo, Annuity Sales>
+<Reinsurance Negotiation, connectedTo, Claim Submission>
+<Reinsurance Negotiation, connectedTo, Market Research>
+<Third_Party Administrator Liaison, connectedTo, Catastrophe Modeling>
+<Underwriting, connectedTo, Payment Processing>
+<Underwriting, connectedTo, Third_Party Administrator Liaison>
+<start, connectedTo, Life Insurance Underwriting>
+<start, connectedTo, Payment Processing>
diff --git a/test/mermaid/hard/mermaid_64.mmd b/test/mermaid/hard/mermaid_64.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..84b6f6dd9a38453c879aa2c145cb818a7ea05e78
--- /dev/null
+++ b/test/mermaid/hard/mermaid_64.mmd
@@ -0,0 +1,146 @@
+graph TD
+    N0([Firewall Configuration])
+    N1[Security Awareness Training]
+    N2[Compliance Monitoring]
+    N3[/Vulnerability Assessment/]
+    N4{Application Security}
+    N5{Data Loss Prevention}
+    N6[/Security Information and Event Management/]
+    N7(Zero Trust Architecture)
+    N8[Supply Chain Security]
+    N9{Cryptography Implementation}
+    N10(Backup and Recovery)
+    N11[Endpoint Protection]
+    N12[Data Encryption]
+    N13[[Physical Security Integration]]
+    N14([Web Application Firewall Deployment])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Insider Threat Detection
+        nest0_0(Security Audit)
+        nest0_1[/Threat Intelligence Gathering/]
+        nest0_2[/Risk Management Framework/]
+        nest0_3{Intrusion Prevention}
+    end
+    subgraph Cloud Security
+        nest1_0[[Security Policy Development]]
+        nest1_1[Incident Response]
+        nest1_2[Threat Detection]
+        nest1_3(Digital Forensics)
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> N12
+    N12 -.-> N13
+    N13 --> N14
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> |detects| nest0_3
+    N10 -.-> nest0_0
+    nest0_3 -.-> N8
+    nest1_0 --> nest1_1
+    nest1_1 -.-> |educates| nest1_2
+    nest1_2 --> nest1_3
+    N11 --> nest1_0
+    nest1_3 --> N7
+    N10 --> S0
+    S0 -.-> N12
+    S0 --> N14
+    S0 --> N13
+    N4 -.-> S1
+    S1 -.-> N11
+    S1 -.-> N9
+    N7 -.-> S2
+    S2 --> N13
+    S2 -.-> N10
+    S2 --> N12
+    N1 --> M0
+    N4 --> M0
+    N3 --> M0
+    M0 -.-> N6
+    N0 --> M1
+    N1 --> M1
+    M1 -.-> N5
+    style N0 fill:#B2EBF2,stroke:#00BCD4
+    style N1 fill:#B2EBF2,stroke:#00BCD4
+    style N2 fill:#B2EBF2,stroke:#00BCD4
+    style N3 fill:#B2EBF2,stroke:#00BCD4
+    style N4 fill:#EFEBE9,stroke:#A1887F
+    style N5 fill:#FFFDE7,stroke:#FBC02D
+    style N6 fill:#FFFDE7,stroke:#FBC02D
+    style N7 fill:#EFEBE9,stroke:#A1887F
+    style N8 fill:#EFEBE9,stroke:#A1887F
+    style N9 fill:#B2EBF2,stroke:#00BCD4
+    style N10 fill:#B2EBF2,stroke:#00BCD4
+    style N11 fill:#FFFDE7,stroke:#FBC02D
+    style N12 fill:#B2EBF2,stroke:#00BCD4
+    style N13 fill:#EFEBE9,stroke:#A1887F
+    style N14 fill:#B2EBF2,stroke:#00BCD4
+    style S0 fill:#EFEBE9,stroke:#A1887F
+    style S1 fill:#EFEBE9,stroke:#A1887F
+    style S2 fill:#FFFDE7,stroke:#FBC02D
+    style M0 fill:#EFEBE9,stroke:#A1887F
+    style M1 fill:#B2EBF2,stroke:#00BCD4
+    style nest0_0 fill:#EFEBE9,stroke:#A1887F
+    style nest0_1 fill:#FFFDE7,stroke:#FBC02D
+    style nest0_2 fill:#FFFDE7,stroke:#FBC02D
+    style nest0_3 fill:#B2EBF2,stroke:#00BCD4
+    style nest1_0 fill:#B2EBF2,stroke:#00BCD4
+    style nest1_1 fill:#FFFDE7,stroke:#FBC02D
+    style nest1_2 fill:#FFFDE7,stroke:#FBC02D
+    style nest1_3 fill:#EFEBE9,stroke:#A1887F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#A1887F,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#00BCD4,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_64.txt b/test/mermaid/hard/mermaid_64.txt
new file mode 100644
index 0000000000000000000000000000000000000000..53cca2a258948c169f49f8519545dfc747270693
--- /dev/null
+++ b/test/mermaid/hard/mermaid_64.txt
@@ -0,0 +1,45 @@
+<Application Security, connectedTo, Cryptography Implementation>
+<Application Security, connectedTo, Data Loss Prevention>
+<Application Security, connectedTo, Endpoint Protection>
+<Application Security, connectedTo, Security Information and Event Management>
+<Backup and Recovery, connectedTo, Data Encryption>
+<Backup and Recovery, connectedTo, Endpoint Protection>
+<Backup and Recovery, connectedTo, Physical Security Integration>
+<Backup and Recovery, connectedTo, Security Audit>
+<Backup and Recovery, connectedTo, Web Application Firewall Deployment>
+<Compliance Monitoring, connectedTo, Vulnerability Assessment>
+<Cryptography Implementation, connectedTo, Backup and Recovery>
+<Data Encryption, connectedTo, Physical Security Integration>
+<Data Loss Prevention, connectedTo, Security Information and Event Management>
+<Digital Forensics, connectedTo, Zero Trust Architecture>
+<Digital Forensics, partOf, Cloud Security>
+<Endpoint Protection, connectedTo, Data Encryption>
+<Endpoint Protection, connectedTo, Security Policy Development>
+<Firewall Configuration, connectedTo, Data Loss Prevention>
+<Firewall Configuration, connectedTo, Security Awareness Training>
+<Incident Response, educates, Threat Detection>
+<Incident Response, partOf, Cloud Security>
+<Intrusion Prevention, connectedTo, Supply Chain Security>
+<Intrusion Prevention, partOf, Insider Threat Detection>
+<Physical Security Integration, connectedTo, Web Application Firewall Deployment>
+<Risk Management Framework, detects, Intrusion Prevention>
+<Risk Management Framework, partOf, Insider Threat Detection>
+<Security Audit, connectedTo, Threat Intelligence Gathering>
+<Security Audit, partOf, Insider Threat Detection>
+<Security Awareness Training, connectedTo, Compliance Monitoring>
+<Security Awareness Training, connectedTo, Data Loss Prevention>
+<Security Awareness Training, connectedTo, Security Information and Event Management>
+<Security Information and Event Management, connectedTo, Zero Trust Architecture>
+<Security Policy Development, connectedTo, Incident Response>
+<Security Policy Development, partOf, Cloud Security>
+<Supply Chain Security, connectedTo, Cryptography Implementation>
+<Threat Detection, connectedTo, Digital Forensics>
+<Threat Detection, partOf, Cloud Security>
+<Threat Intelligence Gathering, connectedTo, Risk Management Framework>
+<Threat Intelligence Gathering, partOf, Insider Threat Detection>
+<Vulnerability Assessment, connectedTo, Application Security>
+<Vulnerability Assessment, connectedTo, Security Information and Event Management>
+<Zero Trust Architecture, connectedTo, Backup and Recovery>
+<Zero Trust Architecture, connectedTo, Data Encryption>
+<Zero Trust Architecture, connectedTo, Physical Security Integration>
+<Zero Trust Architecture, connectedTo, Supply Chain Security>
diff --git a/test/mermaid/hard/mermaid_65.mmd b/test/mermaid/hard/mermaid_65.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..19a488d5924b5937670fc6ab569989623a2a4052
--- /dev/null
+++ b/test/mermaid/hard/mermaid_65.mmd
@@ -0,0 +1,100 @@
+graph TD
+    N0([Supply Chain Security])
+    N1{Network Security}
+    N2[[Intrusion Prevention]]
+    N3(Backup and Recovery)
+    N4[/IoT Security/]
+    N5[Antivirus Management]
+    N6[(Application Security)]
+    N7[Phishing Simulation]
+    N8(Mobile Security)
+    N9[(Digital Forensics)]
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Data Encryption
+        nest0_0(Security Policy Development)
+        nest0_1{Risk Management Framework}
+    end
+    subgraph Security Audit
+        nest1_0(Zero Trust Architecture)
+        nest1_1[[Web Application Firewall Deployment]]
+        nest1_2[[Dark Web Monitoring]]
+        nest1_3(Security Patch Management)
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> |notifies| N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 --> N9
+    nest0_0 --> nest0_1
+    N6 --> nest0_0
+    nest0_1 --> |mitigates| N6
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 -.-> nest1_3
+    N7 -.-> nest1_0
+    nest1_3 -.-> N5
+    N2 -.-> S1
+    S1 -.-> |vulnerabilities| N9
+    S1 --> N7
+    N3 -.-> M0
+    N6 --> M0
+    N1 --> M0
+    M0 -.-> N9
+    N1 -.-> M2
+    N0 -.-> |recovers| M2
+    N3 -.-> M2
+    M2 -.-> N5
+    style N0 fill:#E8EAF6,stroke:#5C6BC0
+    style N1 fill:#E8EAF6,stroke:#5C6BC0
+    style N2 fill:#C9EFEC,stroke:#6FE1D5
+    style N3 fill:#E8EAF6,stroke:#5C6BC0
+    style N4 fill:#D1C4E9,stroke:#673AB7
+    style N5 fill:#D1C4E9,stroke:#673AB7
+    style N6 fill:#C9EFEC,stroke:#6FE1D5
+    style N7 fill:#C9EFEC,stroke:#6FE1D5
+    style N8 fill:#C9EFEC,stroke:#6FE1D5
+    style N9 fill:#D1C4E9,stroke:#673AB7
+    style S1 fill:#D1C4E9,stroke:#673AB7
+    style M0 fill:#D1C4E9,stroke:#673AB7
+    style M2 fill:#E8EAF6,stroke:#5C6BC0
+    style nest0_0 fill:#D1C4E9,stroke:#673AB7
+    style nest0_1 fill:#D1C4E9,stroke:#673AB7
+    style nest1_0 fill:#D1C4E9,stroke:#673AB7
+    style nest1_1 fill:#C9EFEC,stroke:#6FE1D5
+    style nest1_2 fill:#C9EFEC,stroke:#6FE1D5
+    style nest1_3 fill:#E8EAF6,stroke:#5C6BC0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#6FE1D5,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_65.txt b/test/mermaid/hard/mermaid_65.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0c28e6376bb89dada86fb32e5fc2ea7f69fe58b8
--- /dev/null
+++ b/test/mermaid/hard/mermaid_65.txt
@@ -0,0 +1,31 @@
+<Antivirus Management, connectedTo, Application Security>
+<Application Security, connectedTo, Digital Forensics>
+<Application Security, connectedTo, Phishing Simulation>
+<Application Security, connectedTo, Security Policy Development>
+<Backup and Recovery, connectedTo, Antivirus Management>
+<Backup and Recovery, connectedTo, Digital Forensics>
+<Backup and Recovery, notifies, IoT Security>
+<Dark Web Monitoring, connectedTo, Security Patch Management>
+<Dark Web Monitoring, partOf, Security Audit>
+<Intrusion Prevention, connectedTo, Backup and Recovery>
+<Intrusion Prevention, connectedTo, Phishing Simulation>
+<Intrusion Prevention, vulnerabilities, Digital Forensics>
+<IoT Security, connectedTo, Antivirus Management>
+<Mobile Security, connectedTo, Digital Forensics>
+<Network Security, connectedTo, Antivirus Management>
+<Network Security, connectedTo, Digital Forensics>
+<Network Security, connectedTo, Intrusion Prevention>
+<Phishing Simulation, connectedTo, Mobile Security>
+<Phishing Simulation, connectedTo, Zero Trust Architecture>
+<Risk Management Framework, mitigates, Application Security>
+<Risk Management Framework, partOf, Data Encryption>
+<Security Patch Management, connectedTo, Antivirus Management>
+<Security Patch Management, partOf, Security Audit>
+<Security Policy Development, connectedTo, Risk Management Framework>
+<Security Policy Development, partOf, Data Encryption>
+<Supply Chain Security, connectedTo, Network Security>
+<Supply Chain Security, recovers, Antivirus Management>
+<Web Application Firewall Deployment, connectedTo, Dark Web Monitoring>
+<Web Application Firewall Deployment, partOf, Security Audit>
+<Zero Trust Architecture, connectedTo, Web Application Firewall Deployment>
+<Zero Trust Architecture, partOf, Security Audit>
diff --git a/test/mermaid/hard/mermaid_66.txt b/test/mermaid/hard/mermaid_66.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e2da0fd27612eebb845518fb7c3b090cd4171652
--- /dev/null
+++ b/test/mermaid/hard/mermaid_66.txt
@@ -0,0 +1,34 @@
+<Access Control, connectedTo, User Training>
+<Access Control, partOf, Disaster Recovery Planning>
+<Backup and Recovery, connectedTo, Network Security>
+<Backup and Recovery, partOf, Dark Web Monitoring>
+<Cryptography Implementation, connectedTo, Zero Trust Architecture>
+<Cryptography Implementation, partOf, Dark Web Monitoring>
+<DevSecOps Integration, alerts, Network Security>
+<DevSecOps Integration, connectedTo, Malware Analysis>
+<DevSecOps Integration, connectedTo, Penetration Testing>
+<DevSecOps Integration, connectedTo, Supply Chain Security>
+<DevSecOps Integration, patches, Phishing Simulation>
+<Firewall Configuration, connectedTo, DevSecOps Integration>
+<Firewall Configuration, partOf, Disaster Recovery Planning>
+<Identity Management, connectedTo, Access Control>
+<Identity Management, partOf, Disaster Recovery Planning>
+<Incident Response, connectedTo, Cryptography Implementation>
+<Incident Response, connectedTo, Malware Analysis>
+<Malware Analysis, connectedTo, DevSecOps Integration>
+<Malware Analysis, connectedTo, Identity Management>
+<Malware Analysis, connectedTo, Zero Trust Architecture>
+<Network Security, connectedTo, Identity Management>
+<Network Security, connectedTo, Supply Chain Security>
+<Penetration Testing, connectedTo, Access Control>
+<Penetration Testing, connectedTo, Network Security>
+<Penetration Testing, connectedTo, Phishing Simulation>
+<Penetration Testing, connectedTo, Supply Chain Security>
+<Risk Management Framework, connectedTo, Incident Response>
+<Security Information and Event Management, connectedTo, Backup and Recovery>
+<Security Information and Event Management, partOf, Dark Web Monitoring>
+<Supply Chain Security, connectedTo, Phishing Simulation>
+<User Training, partOf, Disaster Recovery Planning>
+<User Training, vulnerabilities, Firewall Configuration>
+<Zero Trust Architecture, connectedTo, Security Information and Event Management>
+<Zero Trust Architecture, partOf, Dark Web Monitoring>
diff --git a/test/mermaid/hard/mermaid_67.mmd b/test/mermaid/hard/mermaid_67.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..3d1903d6258a758f1929e211add469a35d21f9e8
--- /dev/null
+++ b/test/mermaid/hard/mermaid_67.mmd
@@ -0,0 +1,86 @@
+graph RL
+    N0([start])
+    N1[/Energy Monitoring/]
+    N2[Smart Mirror Functionality]
+    N3{Intercom System}
+    N4(Guest Access Management)
+    N5[/Doorbell Camera Alert/]
+    N6(Video Surveillance)
+    N7[Geofencing Trigger]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    subgraph Personalized Comfort Settings
+        nest0_0(Curtain Automation)
+        nest0_1(Routine Scheduling)
+        nest0_2[Remote Control]
+        nest0_3[(Voice Command)]
+    end
+    subgraph App Control
+        nest1_0[Irrigation System Control]
+        nest1_1[(Window Sensor Monitoring)]
+        nest1_2[[Power Outage Notification]]
+        nest1_3[/Emergency Service Connection/]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N1 -.-> nest0_0
+    nest0_3 --> |yes| N3
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> nest1_3
+    N4 -.-> nest1_0
+    nest1_3 --> N7
+    N1 --> S0
+    S0 -.-> N3
+    S0 --> N6
+    S0 -.-> N5
+    S0 -.-> N7
+    N0 --> S1
+    S1 -.-> N7
+    S1 --> N6
+    S1 -.-> N5
+    N2 --> M0
+    N0 -.-> M0
+    M0 -.-> N4
+    style S0 fill:#FAEBF3,stroke:#F7BEE0
+    style S1 fill:#E0F7FA,stroke:#00BCD4
+    style M0 fill:#E6EE9C,stroke:#CDDC39
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#CDDC39,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_67.txt b/test/mermaid/hard/mermaid_67.txt
new file mode 100644
index 0000000000000000000000000000000000000000..a3208b1eff3fbd0e33f9bedc04c318b26f43546d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_67.txt
@@ -0,0 +1,34 @@
+<Curtain Automation, connectedTo, Routine Scheduling>
+<Curtain Automation, partOf, Personalized Comfort Settings>
+<Doorbell Camera Alert, connectedTo, Video Surveillance>
+<Emergency Service Connection, connectedTo, Geofencing Trigger>
+<Emergency Service Connection, partOf, App Control>
+<Energy Monitoring, connectedTo, Curtain Automation>
+<Energy Monitoring, connectedTo, Doorbell Camera Alert>
+<Energy Monitoring, connectedTo, Geofencing Trigger>
+<Energy Monitoring, connectedTo, Intercom System>
+<Energy Monitoring, connectedTo, Smart Mirror Functionality>
+<Energy Monitoring, connectedTo, Video Surveillance>
+<Guest Access Management, connectedTo, Doorbell Camera Alert>
+<Guest Access Management, connectedTo, Irrigation System Control>
+<Intercom System, connectedTo, Guest Access Management>
+<Irrigation System Control, connectedTo, Window Sensor Monitoring>
+<Irrigation System Control, partOf, App Control>
+<Power Outage Notification, connectedTo, Emergency Service Connection>
+<Power Outage Notification, partOf, App Control>
+<Remote Control, connectedTo, Voice Command>
+<Remote Control, partOf, Personalized Comfort Settings>
+<Routine Scheduling, connectedTo, Remote Control>
+<Routine Scheduling, partOf, Personalized Comfort Settings>
+<Smart Mirror Functionality, connectedTo, Guest Access Management>
+<Smart Mirror Functionality, connectedTo, Intercom System>
+<Video Surveillance, connectedTo, Geofencing Trigger>
+<Voice Command, partOf, Personalized Comfort Settings>
+<Voice Command, yes, Intercom System>
+<Window Sensor Monitoring, connectedTo, Power Outage Notification>
+<Window Sensor Monitoring, partOf, App Control>
+<start, connectedTo, Doorbell Camera Alert>
+<start, connectedTo, Energy Monitoring>
+<start, connectedTo, Geofencing Trigger>
+<start, connectedTo, Guest Access Management>
+<start, connectedTo, Video Surveillance>
diff --git a/test/mermaid/hard/mermaid_68.mmd b/test/mermaid/hard/mermaid_68.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..ecc4b05935f81a40d8b1b96efb6725061e25e4a8
--- /dev/null
+++ b/test/mermaid/hard/mermaid_68.mmd
@@ -0,0 +1,128 @@
+graph BT
+    N0([start])
+    N1{Air Quality Monitoring}
+    N2[Garage Door Control]
+    N3[Automated Vacuum Cleaning]
+    N4[Firmware Update]
+    N5([Elderly Care Monitoring])
+    N6(Home Security System Activation)
+    N7([Thermostat Adjustment])
+    N8([Emergency Service Connection])
+    N9(Energy Consumption Optimization)
+    N10(Personalized Comfort Settings)
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Security Alert
+        nest0_0[Lighting Automation]
+        nest0_1[(Window Sensor Monitoring)]
+        nest0_2[[Motion Detection]]
+        nest0_3[/Smart Appliance Control/]
+    end
+    subgraph Intercom System
+        nest1_0[Sound System Integration]
+        nest1_1[Geofencing Trigger]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N5 -.-> nest0_0
+    nest0_3 --> N6
+    nest1_0 -.-> nest1_1
+    N8 -.-> |simplifies| nest1_0
+    nest1_1 -.-> |cools| N7
+    N7 --> S0
+    S0 -.-> N9
+    S0 --> N10
+    N5 -.-> S1
+    S1 --> N8
+    S1 --> N9
+    S1 --> |interacts| N7
+    S1 --> N10
+    N5 --> S2
+    S2 -.-> N8
+    S2 -.-> N9
+    S2 -.-> N10
+    S2 --> N7
+    N3 -.-> M0
+    N1 -.-> M0
+    N2 -.-> |monitors| M0
+    N4 -.-> M0
+    M0 -.-> N7
+    N1 -.-> M1
+    N0 --> M1
+    M1 --> N3
+    style N0 fill:#D0E0F8,stroke:#4285F4
+    style N1 fill:#D0E0F8,stroke:#4285F4
+    style N2 fill:#E0E6E9,stroke:#AABEC6
+    style N3 fill:#D0E0F8,stroke:#4285F4
+    style N4 fill:#FFE0B2,stroke:#FF9800
+    style N5 fill:#D0E0F8,stroke:#4285F4
+    style N6 fill:#D0E0F8,stroke:#4285F4
+    style N7 fill:#FFE0B2,stroke:#FF9800
+    style N8 fill:#E0E6E9,stroke:#AABEC6
+    style N9 fill:#E0E6E9,stroke:#AABEC6
+    style N10 fill:#E0E6E9,stroke:#AABEC6
+    style S0 fill:#D0E0F8,stroke:#4285F4
+    style S1 fill:#FFE0B2,stroke:#FF9800
+    style S2 fill:#FFE0B2,stroke:#FF9800
+    style M0 fill:#D0E0F8,stroke:#4285F4
+    style M1 fill:#E0E6E9,stroke:#AABEC6
+    style nest0_0 fill:#E0E6E9,stroke:#AABEC6
+    style nest0_1 fill:#FFE0B2,stroke:#FF9800
+    style nest0_2 fill:#D0E0F8,stroke:#4285F4
+    style nest0_3 fill:#FFE0B2,stroke:#FF9800
+    style nest1_0 fill:#E0E6E9,stroke:#AABEC6
+    style nest1_1 fill:#E0E6E9,stroke:#AABEC6
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_69.mmd b/test/mermaid/hard/mermaid_69.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..99bc2ff3c24e233670821dc919f852a779b62f29
--- /dev/null
+++ b/test/mermaid/hard/mermaid_69.mmd
@@ -0,0 +1,112 @@
+graph BT
+    N0([Water Heater Control])
+    N1[(Firmware Update)]
+    N2([Guest Access Management])
+    N3[Irrigation System Control]
+    N4[[Window Sensor Monitoring]]
+    N5([Smart Mirror Functionality])
+    N6[(Device Pairing)]
+    N7([Automated Vacuum Cleaning])
+    N8[Remote Control]
+    N9(Centralized Hub Configuration)
+    N10[Smart Plug Management]
+    N11[(Smart Appliance Control)]
+    N12([Routine Scheduling])
+    N13([App Control])
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    subgraph Scene Creation
+        nest0_0([Geofencing Trigger])
+        nest0_1[Child Monitoring]
+        nest0_2(Energy Monitoring)
+    end
+    subgraph Sound System Integration
+        nest1_0([Home Security System Activation])
+        nest1_1[/Curtain Automation/]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N7 --> nest0_0
+    nest0_2 -.-> N10
+    nest1_0 -.-> nest1_1
+    N12 --> nest1_0
+    nest1_1 --> N7
+    N6 --> S1
+    S1 -.-> N10
+    S1 -.-> N11
+    S1 -.-> N13
+    N1 --> S2
+    S2 -.-> N9
+    S2 --> N5
+    S2 --> N8
+    N1 --> M0
+    N0 --> |alerts| M0
+    M0 --> N3
+    style N0 fill:#FFDAB9,stroke:#FFC085
+    style N1 fill:#FFDAB9,stroke:#FFC085
+    style N2 fill:#C9EFEC,stroke:#6FE1D5
+    style N3 fill:#FFDAB9,stroke:#FFC085
+    style N4 fill:#FBE9E7,stroke:#FF8A65
+    style N5 fill:#C9EFEC,stroke:#6FE1D5
+    style N6 fill:#C9EFEC,stroke:#6FE1D5
+    style N7 fill:#C9EFEC,stroke:#6FE1D5
+    style N8 fill:#C9EFEC,stroke:#6FE1D5
+    style N9 fill:#FFDAB9,stroke:#FFC085
+    style N10 fill:#C9EFEC,stroke:#6FE1D5
+    style N11 fill:#FFDAB9,stroke:#FFC085
+    style N12 fill:#FFDAB9,stroke:#FFC085
+    style N13 fill:#FFDAB9,stroke:#FFC085
+    style S1 fill:#C9EFEC,stroke:#6FE1D5
+    style S2 fill:#FBE9E7,stroke:#FF8A65
+    style M0 fill:#FBE9E7,stroke:#FF8A65
+    style nest0_0 fill:#C9EFEC,stroke:#6FE1D5
+    style nest0_1 fill:#C9EFEC,stroke:#6FE1D5
+    style nest0_2 fill:#FBE9E7,stroke:#FF8A65
+    style nest1_0 fill:#C9EFEC,stroke:#6FE1D5
+    style nest1_1 fill:#FBE9E7,stroke:#FF8A65
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#6FE1D5,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FF8A65,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFC085,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#6FE1D5,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_7.txt b/test/mermaid/hard/mermaid_7.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ac4821cab055ce85d8a39ff66532ed5c1cc9876a
--- /dev/null
+++ b/test/mermaid/hard/mermaid_7.txt
@@ -0,0 +1,38 @@
+<Automated Assembly, analyzes, Supplier Qualification>
+<Automated Assembly, connectedTo, Maintenance>
+<Automated Assembly, connectedTo, Predictive Maintenance>
+<Automated Assembly, connectedTo, Raw Material>
+<Automated Assembly, connectedTo, Shipping>
+<Automated Assembly, connectedTo, Supplier Qualification>
+<Component Sourcing, connectedTo, Maintenance>
+<Component Sourcing, connectedTo, Supplier Qualification>
+<Ergonomics Assessment, connectedTo, Predictive Maintenance>
+<Ergonomics Assessment, connectedTo, Shipping>
+<Final Testing, connectedTo, Supplier Qualification>
+<Final Testing, disposes, Automated Assembly>
+<Inventory Check, connectedTo, Production Scheduling>
+<Inventory Check, partOf, Workflow Optimization>
+<Logistics Planning, partOf, Storage>
+<Logistics Planning, processes, Ergonomics Assessment>
+<Maintenance, connectedTo, Predictive Maintenance>
+<Maintenance, connectedTo, Supplier Qualification>
+<Maintenance, connectedTo, Tool Path Generation>
+<Packaging, connectedTo, Product Design>
+<Packaging, partOf, Storage>
+<Painting, connectedTo, Inventory Check>
+<Painting, partOf, Workflow Optimization>
+<Predictive Maintenance, labels, Production Scheduling>
+<Product Design, connectedTo, Logistics Planning>
+<Product Design, partOf, Storage>
+<Production Scheduling, connectedTo, Bills of Material Generation>
+<Production Scheduling, connectedTo, Supplier Qualification>
+<Production Scheduling, connectedTo, Tool Setup>
+<Raw Material, connectedTo, Ergonomics Assessment>
+<Raw Material, connectedTo, Predictive Maintenance>
+<Shipping, connectedTo, Component Sourcing>
+<Shipping, connectedTo, Packaging>
+<Shipping, connectedTo, Predictive Maintenance>
+<Supplier Qualification, connectedTo, Bills of Material Generation>
+<Tool Path Generation, connectedTo, Painting>
+<Tool Path Generation, partOf, Workflow Optimization>
+<Tool Setup, connectedTo, Supplier Qualification>
diff --git a/test/mermaid/hard/mermaid_70.mmd b/test/mermaid/hard/mermaid_70.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..6ad133a87f93c10dab46924d0e4c72e8e19b6fce
--- /dev/null
+++ b/test/mermaid/hard/mermaid_70.mmd
@@ -0,0 +1,93 @@
+graph TD
+    N0([start])
+    N1(Disaster Resilience Planning)
+    N2{Smart Parking}
+    N3[[Green Space Management]]
+    N4{Waste Management Optimization}
+    N5[/Digital Kiosk Information/]
+    N6[/Predictive Maintenance for Utilities/]
+    N7(Citizen Engagement Platform)
+    N8[(Infrastructure Maintenance Alert)]
+    N9[Data Privacy Protection]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    subgraph Water Management System
+        nest0_0{Environmental Sensor Network}
+        nest0_1[Smart Street Furniture]
+        nest0_2[[Smart Building Integration]]
+    end
+    subgraph Air Quality Index Reporting
+        nest1_0[(City_wide Sensor Network Deployment)]
+        nest1_1[[Renewable Energy Integration]]
+        nest1_2([Smart Lighting])
+        nest1_3(E_governance Services)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> |no| N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> |yes| N8
+    N8 --> |yes| N9
+    nest0_0 -.-> nest0_1
+    nest0_1 --> |no| nest0_2
+    N3 -.-> nest0_0
+    nest0_2 --> N4
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    nest1_2 --> nest1_3
+    N8 -.-> nest1_0
+    nest1_3 -.-> N4
+    N3 -.-> S0
+    S0 -.-> N6
+    S0 --> N5
+    S0 -.-> |yes| N8
+    S0 -.-> N7
+    N3 -.-> S1
+    S1 --> N9
+    S1 --> N5
+    S1 -.-> N6
+    N3 --> M0
+    N2 --> M0
+    N0 -.-> M0
+    N1 --> M0
+    M0 --> N5
+    style S0 fill:#D6D9F0,stroke:#9FA9E1
+    style S1 fill:#D6D9F0,stroke:#9FA9E1
+    style M0 fill:#FFFAE0,stroke:#FFE470
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#9FA9E1,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#CDDC39,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#9FA9E1,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_70.txt b/test/mermaid/hard/mermaid_70.txt
new file mode 100644
index 0000000000000000000000000000000000000000..0868ca2f37e314b10646e627fae135ff7074d5fd
--- /dev/null
+++ b/test/mermaid/hard/mermaid_70.txt
@@ -0,0 +1,33 @@
+<Citizen Engagement Platform, yes, Infrastructure Maintenance Alert>
+<City_wide Sensor Network Deployment, connectedTo, Renewable Energy Integration>
+<City_wide Sensor Network Deployment, partOf, Air Quality Index Reporting>
+<Digital Kiosk Information, connectedTo, Predictive Maintenance for Utilities>
+<Disaster Resilience Planning, connectedTo, Digital Kiosk Information>
+<Disaster Resilience Planning, connectedTo, Smart Parking>
+<E_governance Services, connectedTo, Waste Management Optimization>
+<E_governance Services, partOf, Air Quality Index Reporting>
+<Environmental Sensor Network, connectedTo, Smart Street Furniture>
+<Environmental Sensor Network, partOf, Water Management System>
+<Green Space Management, connectedTo, Citizen Engagement Platform>
+<Green Space Management, connectedTo, Data Privacy Protection>
+<Green Space Management, connectedTo, Digital Kiosk Information>
+<Green Space Management, connectedTo, Environmental Sensor Network>
+<Green Space Management, connectedTo, Predictive Maintenance for Utilities>
+<Green Space Management, connectedTo, Waste Management Optimization>
+<Green Space Management, yes, Infrastructure Maintenance Alert>
+<Infrastructure Maintenance Alert, connectedTo, City_wide Sensor Network Deployment>
+<Infrastructure Maintenance Alert, yes, Data Privacy Protection>
+<Predictive Maintenance for Utilities, connectedTo, Citizen Engagement Platform>
+<Renewable Energy Integration, connectedTo, Smart Lighting>
+<Renewable Energy Integration, partOf, Air Quality Index Reporting>
+<Smart Building Integration, connectedTo, Waste Management Optimization>
+<Smart Building Integration, partOf, Water Management System>
+<Smart Lighting, connectedTo, E_governance Services>
+<Smart Lighting, partOf, Air Quality Index Reporting>
+<Smart Parking, connectedTo, Digital Kiosk Information>
+<Smart Parking, connectedTo, Green Space Management>
+<Smart Street Furniture, no, Smart Building Integration>
+<Smart Street Furniture, partOf, Water Management System>
+<Waste Management Optimization, no, Digital Kiosk Information>
+<start, connectedTo, Digital Kiosk Information>
+<start, connectedTo, Disaster Resilience Planning>
diff --git a/test/mermaid/hard/mermaid_72.mmd b/test/mermaid/hard/mermaid_72.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..f84fcb3a08576e9169820a85485df494852ef9cb
--- /dev/null
+++ b/test/mermaid/hard/mermaid_72.mmd
@@ -0,0 +1,92 @@
+graph LR
+    N0([start])
+    N1[/Predictive Maintenance for Utilities/]
+    N2[[Noise Pollution Monitoring]]
+    N3[Public Wi_Fi Deployment]
+    N4[Smart Traffic Lights]
+    N5[Urban Mobility Solutions]
+    N6[Crowd Management]
+    N7([Water Management System])
+    N8[City_wide Sensor Network Deployment]
+    S0(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Urban Agriculture Support
+        nest0_0[Smart Street Furniture]
+        nest0_1[(Digital Twins of City)]
+    end
+    subgraph Citizen Feedback Loop
+        nest1_0[/Sustainable Resource Management/]
+        nest1_1(Urban Planning Data Analysis)
+        nest1_2[Public Transport Tracking]
+        nest1_3[Smart Building Integration]
+    end
+    N0 -.-> |partners| N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 --> |tracks| N7
+    N7 -.-> |innovates| N8
+    nest0_0 --> nest0_1
+    N3 -.-> nest0_0
+    nest0_1 -.-> N6
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> |deploys| nest1_2
+    nest1_2 --> nest1_3
+    N6 --> nest1_0
+    nest1_3 -.-> N5
+    N5 -.-> S0
+    S0 -.-> N7
+    S0 --> N8
+    N2 --> S2
+    S2 --> N6
+    S2 --> N4
+    N4 --> M1
+    N1 -.-> |engages| M1
+    M1 --> N7
+    style N0 fill:#FFE0B2,stroke:#FF9800
+    style N1 fill:#FFE0B2,stroke:#FF9800
+    style N2 fill:#FFF8E1,stroke:#FFD54F
+    style N3 fill:#FFF8E1,stroke:#FFD54F
+    style N4 fill:#F5F5DC,stroke:#BCB88A
+    style N5 fill:#F5F5DC,stroke:#BCB88A
+    style N6 fill:#FFE0B2,stroke:#FF9800
+    style N7 fill:#F5F5DC,stroke:#BCB88A
+    style N8 fill:#FFE0B2,stroke:#FF9800
+    style S0 fill:#FFF8E1,stroke:#FFD54F
+    style S2 fill:#F5F5DC,stroke:#BCB88A
+    style M1 fill:#FFE0B2,stroke:#FF9800
+    style nest0_0 fill:#F5F5DC,stroke:#BCB88A
+    style nest0_1 fill:#FFE0B2,stroke:#FF9800
+    style nest1_0 fill:#F5F5DC,stroke:#BCB88A
+    style nest1_1 fill:#F5F5DC,stroke:#BCB88A
+    style nest1_2 fill:#FFF8E1,stroke:#FFD54F
+    style nest1_3 fill:#FFE0B2,stroke:#FF9800
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FF9800,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_73.mmd b/test/mermaid/hard/mermaid_73.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..fc8d20f76908086a129005f3982be218738a7789
--- /dev/null
+++ b/test/mermaid/hard/mermaid_73.mmd
@@ -0,0 +1,150 @@
+graph TD
+    N0([Genomic Editing])
+    N1(Biomanufacturing Scale_up)
+    N2[Microbial Fermentation]
+    N3(Bioprocess Optimization)
+    N4(Drug Discovery)
+    N5{Synthetic Biology Design}
+    N6[(Personalized Medicine Formulation)]
+    N7[Gene Sequencing]
+    N8[Preclinical Testing]
+    N9(Nanobiotechnology Application)
+    N10[[Bioinformatics Analysis]]
+    N11([Bioreactor Operation])
+    N12[Target Identification]
+    N13[/Lab Automation/]
+    N14(Data Management and Analysis)
+    N15[[Biosafety Protocol]]
+    N16([Stem Cell Research])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Tissue Engineering
+        nest0_0(Pharmacogenomics)
+        nest0_1([Assay Development])
+        nest0_2[(Cell Culture)]
+        nest0_3[[Monoclonal Antibody Production]]
+    end
+    subgraph Structural Biology
+        nest1_0{Bioimaging}
+        nest1_1(Biomarker Discovery)
+        nest1_2[(Quality Control)]
+    end
+    N0 --> |funds| N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> |designs| N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 -.-> |delivers| N12
+    N12 --> N13
+    N13 --> N14
+    N14 -.-> N15
+    N15 -.-> N16
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N12 -.-> nest0_0
+    nest0_3 -.-> N11
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> |modifies| nest1_2
+    N1 --> nest1_0
+    nest1_2 -.-> N9
+    N2 --> S0
+    S0 -.-> N11
+    S0 -.-> N12
+    S0 -.-> N8
+    S0 -.-> N15
+    N7 -.-> S1
+    S1 -.-> N13
+    S1 -.-> N10
+    N13 -.-> S2
+    S2 -.-> N16
+    S2 --> N15
+    N1 -.-> M0
+    N0 --> M0
+    N6 -.-> M0
+    M0 --> N10
+    N8 -.-> M1
+    N6 --> M1
+    M1 --> N12
+    style N0 fill:#F1F8FF,stroke:#42A5F5
+    style N1 fill:#D3D7EB,stroke:#8C9EFF
+    style N2 fill:#F6F6F6,stroke:#CFCFCF
+    style N3 fill:#F1F8FF,stroke:#42A5F5
+    style N4 fill:#F1F8FF,stroke:#42A5F5
+    style N5 fill:#D3D7EB,stroke:#8C9EFF
+    style N6 fill:#F1F8FF,stroke:#42A5F5
+    style N7 fill:#F6F6F6,stroke:#CFCFCF
+    style N8 fill:#F1F8FF,stroke:#42A5F5
+    style N9 fill:#F6F6F6,stroke:#CFCFCF
+    style N10 fill:#D3D7EB,stroke:#8C9EFF
+    style N11 fill:#F6F6F6,stroke:#CFCFCF
+    style N12 fill:#F6F6F6,stroke:#CFCFCF
+    style N13 fill:#F6F6F6,stroke:#CFCFCF
+    style N14 fill:#D3D7EB,stroke:#8C9EFF
+    style N15 fill:#F1F8FF,stroke:#42A5F5
+    style N16 fill:#F6F6F6,stroke:#CFCFCF
+    style S0 fill:#F6F6F6,stroke:#CFCFCF
+    style S1 fill:#F1F8FF,stroke:#42A5F5
+    style S2 fill:#F6F6F6,stroke:#CFCFCF
+    style M0 fill:#D3D7EB,stroke:#8C9EFF
+    style M1 fill:#F1F8FF,stroke:#42A5F5
+    style nest0_0 fill:#F1F8FF,stroke:#42A5F5
+    style nest0_1 fill:#F6F6F6,stroke:#CFCFCF
+    style nest0_2 fill:#F1F8FF,stroke:#42A5F5
+    style nest0_3 fill:#D3D7EB,stroke:#8C9EFF
+    style nest1_0 fill:#F1F8FF,stroke:#42A5F5
+    style nest1_1 fill:#F6F6F6,stroke:#CFCFCF
+    style nest1_2 fill:#F6F6F6,stroke:#CFCFCF
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#8C9EFF,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_73.txt b/test/mermaid/hard/mermaid_73.txt
new file mode 100644
index 0000000000000000000000000000000000000000..299b0fc304489817cd8146962831db6c6b0a4b00
--- /dev/null
+++ b/test/mermaid/hard/mermaid_73.txt
@@ -0,0 +1,45 @@
+<Assay Development, connectedTo, Cell Culture>
+<Assay Development, partOf, Tissue Engineering>
+<Bioimaging, connectedTo, Biomarker Discovery>
+<Bioimaging, partOf, Structural Biology>
+<Bioinformatics Analysis, connectedTo, Bioreactor Operation>
+<Biomanufacturing Scale_up, connectedTo, Bioimaging>
+<Biomanufacturing Scale_up, connectedTo, Bioinformatics Analysis>
+<Biomanufacturing Scale_up, connectedTo, Microbial Fermentation>
+<Biomarker Discovery, modifies, Quality Control>
+<Biomarker Discovery, partOf, Structural Biology>
+<Bioprocess Optimization, connectedTo, Drug Discovery>
+<Bioreactor Operation, delivers, Target Identification>
+<Biosafety Protocol, connectedTo, Stem Cell Research>
+<Cell Culture, connectedTo, Monoclonal Antibody Production>
+<Cell Culture, partOf, Tissue Engineering>
+<Data Management and Analysis, connectedTo, Biosafety Protocol>
+<Drug Discovery, connectedTo, Synthetic Biology Design>
+<Gene Sequencing, connectedTo, Bioinformatics Analysis>
+<Gene Sequencing, connectedTo, Lab Automation>
+<Gene Sequencing, designs, Preclinical Testing>
+<Genomic Editing, connectedTo, Bioinformatics Analysis>
+<Genomic Editing, funds, Biomanufacturing Scale_up>
+<Lab Automation, connectedTo, Biosafety Protocol>
+<Lab Automation, connectedTo, Data Management and Analysis>
+<Lab Automation, connectedTo, Stem Cell Research>
+<Microbial Fermentation, connectedTo, Bioprocess Optimization>
+<Microbial Fermentation, connectedTo, Bioreactor Operation>
+<Microbial Fermentation, connectedTo, Biosafety Protocol>
+<Microbial Fermentation, connectedTo, Preclinical Testing>
+<Microbial Fermentation, connectedTo, Target Identification>
+<Monoclonal Antibody Production, connectedTo, Bioreactor Operation>
+<Monoclonal Antibody Production, partOf, Tissue Engineering>
+<Nanobiotechnology Application, connectedTo, Bioinformatics Analysis>
+<Personalized Medicine Formulation, connectedTo, Bioinformatics Analysis>
+<Personalized Medicine Formulation, connectedTo, Gene Sequencing>
+<Personalized Medicine Formulation, connectedTo, Target Identification>
+<Pharmacogenomics, connectedTo, Assay Development>
+<Pharmacogenomics, partOf, Tissue Engineering>
+<Preclinical Testing, connectedTo, Nanobiotechnology Application>
+<Preclinical Testing, connectedTo, Target Identification>
+<Quality Control, connectedTo, Nanobiotechnology Application>
+<Quality Control, partOf, Structural Biology>
+<Synthetic Biology Design, connectedTo, Personalized Medicine Formulation>
+<Target Identification, connectedTo, Lab Automation>
+<Target Identification, connectedTo, Pharmacogenomics>
diff --git a/test/mermaid/hard/mermaid_74.mmd b/test/mermaid/hard/mermaid_74.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..c9615f14e561c4bf19b7810819f2f63e79cb3bae
--- /dev/null
+++ b/test/mermaid/hard/mermaid_74.mmd
@@ -0,0 +1,107 @@
+graph BT
+    N0([start])
+    N1[(Target Identification)]
+    N2([Bioimaging])
+    N3{Bioinformatics Analysis}
+    N4[Genomic Editing]
+    N5([Drug Repurposing])
+    N6([Pharmacogenomics])
+    N7(Clinical Trial Design)
+    N8([Assay Development])
+    N9[[Vaccine Development]]
+    N10{Stem Cell Research}
+    N11[/Biosafety Protocol/]
+    N12([Lab Automation])
+    N13([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Bioprocess Optimization
+        nest0_0[Protein Engineering]
+        nest0_1{Biomarker Discovery}
+    end
+    subgraph Tissue Engineering
+        nest1_0(Environmental Bioremediation)
+        nest1_1{Clinical Data Interpretation}
+        nest1_2(Gene Sequencing)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 --> N9
+    N9 --> |yes| N10
+    N10 -.-> |yes| N11
+    N11 --> |no| N12
+    N12 -.-> N13
+    nest0_0 --> nest0_1
+    N11 -.-> nest0_0
+    nest0_1 -.-> N13
+    nest1_0 -.-> |yes| nest1_1
+    nest1_1 --> nest1_2
+    N7 -.-> |no| nest1_0
+    nest1_2 --> N10
+    N0 --> S0
+    S0 --> N3
+    S0 --> |no| N9
+    N4 --> S1
+    S1 -.-> N13
+    S1 --> N10
+    S1 --> N7
+    N10 -.-> S2
+    S2 -.-> N12
+    S2 -.-> |no| N13
+    N6 -.-> M0
+    N0 --> M0
+    M0 -.-> N10
+    N0 -.-> M2
+    N5 -.-> M2
+    M2 --> N7
+    style S0 fill:#E8EAF6,stroke:#5C6BC0
+    style S1 fill:#E8EAF6,stroke:#5C6BC0
+    style S2 fill:#B3E5FC,stroke:#03A9F4
+    style M0 fill:#B3E5FC,stroke:#03A9F4
+    style M2 fill:#E8EAF6,stroke:#5C6BC0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#5C6BC0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#CB9BE1,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_74.txt b/test/mermaid/hard/mermaid_74.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7371390aa3fd196bc509af3fd43c55d2ac4088cc
--- /dev/null
+++ b/test/mermaid/hard/mermaid_74.txt
@@ -0,0 +1,36 @@
+<Assay Development, connectedTo, Vaccine Development>
+<Bioimaging, connectedTo, Bioinformatics Analysis>
+<Bioinformatics Analysis, connectedTo, Genomic Editing>
+<Biomarker Discovery, connectedTo, end>
+<Biomarker Discovery, partOf, Bioprocess Optimization>
+<Biosafety Protocol, connectedTo, Protein Engineering>
+<Biosafety Protocol, no, Lab Automation>
+<Clinical Data Interpretation, connectedTo, Gene Sequencing>
+<Clinical Data Interpretation, partOf, Tissue Engineering>
+<Clinical Trial Design, connectedTo, Assay Development>
+<Clinical Trial Design, no, Environmental Bioremediation>
+<Drug Repurposing, connectedTo, Clinical Trial Design>
+<Drug Repurposing, connectedTo, Pharmacogenomics>
+<Environmental Bioremediation, partOf, Tissue Engineering>
+<Environmental Bioremediation, yes, Clinical Data Interpretation>
+<Gene Sequencing, connectedTo, Stem Cell Research>
+<Gene Sequencing, partOf, Tissue Engineering>
+<Genomic Editing, connectedTo, Clinical Trial Design>
+<Genomic Editing, connectedTo, Drug Repurposing>
+<Genomic Editing, connectedTo, Stem Cell Research>
+<Genomic Editing, connectedTo, end>
+<Lab Automation, connectedTo, end>
+<Pharmacogenomics, connectedTo, Clinical Trial Design>
+<Pharmacogenomics, connectedTo, Stem Cell Research>
+<Protein Engineering, connectedTo, Biomarker Discovery>
+<Protein Engineering, partOf, Bioprocess Optimization>
+<Stem Cell Research, connectedTo, Lab Automation>
+<Stem Cell Research, no, end>
+<Stem Cell Research, yes, Biosafety Protocol>
+<Target Identification, connectedTo, Bioimaging>
+<Vaccine Development, yes, Stem Cell Research>
+<start, connectedTo, Bioinformatics Analysis>
+<start, connectedTo, Clinical Trial Design>
+<start, connectedTo, Stem Cell Research>
+<start, connectedTo, Target Identification>
+<start, no, Vaccine Development>
diff --git a/test/mermaid/hard/mermaid_75.mmd b/test/mermaid/hard/mermaid_75.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..cbf018413f13fe55b089cbad551e7f03be3c8aa0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_75.mmd
@@ -0,0 +1,154 @@
+graph RL
+    N0([Protein Engineering])
+    N1(Gene Therapy Delivery)
+    N2[[Gene Sequencing]]
+    N3[[Genomic Editing]]
+    N4[Target Identification]
+    N5[(Vaccine Development)]
+    N6[/Preclinical Testing/]
+    N7{Drug Repurposing}
+    N8[Clinical Trial Design]
+    N9[Biosensor Development]
+    N10[(Biomarker Discovery)]
+    N11(Lab Automation)
+    N12([Computational Biology Modeling])
+    N13[Microbial Fermentation]
+    N14[/Intellectual Property Protection/]
+    N15(Regulatory Submission)
+    N16[[Quality Control]]
+    N17([Tissue Engineering])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Assay Development
+        nest0_0[[Bioimaging]]
+        nest0_1(Synthetic Biology Design)
+        nest0_2[Stem Cell Research]
+        nest0_3(Bioinformatics Analysis)
+    end
+    subgraph Biosafety Protocol
+        nest1_0[(Bioreactor Operation)]
+        nest1_1(CRISPR Technology Application)
+        nest1_2(Biomanufacturing Scale_up)
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> N4
+    N4 -.-> |researches| N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 --> |designs| N15
+    N15 --> N16
+    N16 -.-> |applies| N17
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N13 -.-> nest0_0
+    nest0_3 -.-> N10
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N16 --> nest1_0
+    nest1_2 --> N6
+    N4 --> S0
+    S0 --> N9
+    S0 --> N7
+    S0 -.-> N8
+    N10 -.-> S1
+    S1 -.-> N14
+    S1 --> |models| N12
+    N7 --> M0
+    N4 -.-> M0
+    N1 -.-> |analyzes| M0
+    M0 --> N9
+    N9 --> M1
+    N2 --> M1
+    N11 --> M1
+    M1 -.-> N17
+    N5 --> |complies| M2
+    N0 --> M2
+    M2 -.-> N8
+    style N0 fill:#ECEFF1,stroke:#90A4AE
+    style N1 fill:#ECEFF1,stroke:#90A4AE
+    style N2 fill:#F5F5F5,stroke:#BDBDBD
+    style N3 fill:#F5F5F5,stroke:#BDBDBD
+    style N4 fill:#FFF8E1,stroke:#FFD54F
+    style N5 fill:#ECEFF1,stroke:#90A4AE
+    style N6 fill:#F5F5F5,stroke:#BDBDBD
+    style N7 fill:#F5F5F5,stroke:#BDBDBD
+    style N8 fill:#ECEFF1,stroke:#90A4AE
+    style N9 fill:#ECEFF1,stroke:#90A4AE
+    style N10 fill:#FFF8E1,stroke:#FFD54F
+    style N11 fill:#F5F5F5,stroke:#BDBDBD
+    style N12 fill:#F5F5F5,stroke:#BDBDBD
+    style N13 fill:#F5F5F5,stroke:#BDBDBD
+    style N14 fill:#ECEFF1,stroke:#90A4AE
+    style N15 fill:#ECEFF1,stroke:#90A4AE
+    style N16 fill:#ECEFF1,stroke:#90A4AE
+    style N17 fill:#FFF8E1,stroke:#FFD54F
+    style S0 fill:#F5F5F5,stroke:#BDBDBD
+    style S1 fill:#FFF8E1,stroke:#FFD54F
+    style M0 fill:#FFF8E1,stroke:#FFD54F
+    style M1 fill:#F5F5F5,stroke:#BDBDBD
+    style M2 fill:#F5F5F5,stroke:#BDBDBD
+    style nest0_0 fill:#ECEFF1,stroke:#90A4AE
+    style nest0_1 fill:#FFF8E1,stroke:#FFD54F
+    style nest0_2 fill:#ECEFF1,stroke:#90A4AE
+    style nest0_3 fill:#ECEFF1,stroke:#90A4AE
+    style nest1_0 fill:#FFF8E1,stroke:#FFD54F
+    style nest1_1 fill:#FFF8E1,stroke:#FFD54F
+    style nest1_2 fill:#FFF8E1,stroke:#FFD54F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#90A4AE,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_75.txt b/test/mermaid/hard/mermaid_75.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6313f4c2239e7f6641620014718f45ee0488e1a1
--- /dev/null
+++ b/test/mermaid/hard/mermaid_75.txt
@@ -0,0 +1,45 @@
+<Bioimaging, connectedTo, Synthetic Biology Design>
+<Bioimaging, partOf, Assay Development>
+<Bioinformatics Analysis, connectedTo, Biomarker Discovery>
+<Bioinformatics Analysis, partOf, Assay Development>
+<Biomanufacturing Scale_up, connectedTo, Preclinical Testing>
+<Biomanufacturing Scale_up, partOf, Biosafety Protocol>
+<Biomarker Discovery, connectedTo, Intellectual Property Protection>
+<Biomarker Discovery, connectedTo, Lab Automation>
+<Biomarker Discovery, models, Computational Biology Modeling>
+<Bioreactor Operation, connectedTo, CRISPR Technology Application>
+<Bioreactor Operation, partOf, Biosafety Protocol>
+<Biosensor Development, connectedTo, Biomarker Discovery>
+<Biosensor Development, connectedTo, Tissue Engineering>
+<CRISPR Technology Application, connectedTo, Biomanufacturing Scale_up>
+<CRISPR Technology Application, partOf, Biosafety Protocol>
+<Clinical Trial Design, connectedTo, Biosensor Development>
+<Computational Biology Modeling, connectedTo, Microbial Fermentation>
+<Drug Repurposing, connectedTo, Biosensor Development>
+<Drug Repurposing, connectedTo, Clinical Trial Design>
+<Gene Sequencing, connectedTo, Genomic Editing>
+<Gene Sequencing, connectedTo, Tissue Engineering>
+<Gene Therapy Delivery, analyzes, Biosensor Development>
+<Gene Therapy Delivery, connectedTo, Gene Sequencing>
+<Genomic Editing, connectedTo, Target Identification>
+<Intellectual Property Protection, designs, Regulatory Submission>
+<Lab Automation, connectedTo, Computational Biology Modeling>
+<Lab Automation, connectedTo, Tissue Engineering>
+<Microbial Fermentation, connectedTo, Bioimaging>
+<Microbial Fermentation, connectedTo, Intellectual Property Protection>
+<Preclinical Testing, connectedTo, Drug Repurposing>
+<Protein Engineering, connectedTo, Clinical Trial Design>
+<Protein Engineering, connectedTo, Gene Therapy Delivery>
+<Quality Control, applies, Tissue Engineering>
+<Quality Control, connectedTo, Bioreactor Operation>
+<Regulatory Submission, connectedTo, Quality Control>
+<Stem Cell Research, connectedTo, Bioinformatics Analysis>
+<Stem Cell Research, partOf, Assay Development>
+<Synthetic Biology Design, connectedTo, Stem Cell Research>
+<Synthetic Biology Design, partOf, Assay Development>
+<Target Identification, connectedTo, Biosensor Development>
+<Target Identification, connectedTo, Clinical Trial Design>
+<Target Identification, connectedTo, Drug Repurposing>
+<Target Identification, researches, Vaccine Development>
+<Vaccine Development, complies, Clinical Trial Design>
+<Vaccine Development, connectedTo, Preclinical Testing>
diff --git a/test/mermaid/hard/mermaid_76.mmd b/test/mermaid/hard/mermaid_76.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..c00abbdda04c2c195625a95979f5b4149a0bfb8f
--- /dev/null
+++ b/test/mermaid/hard/mermaid_76.mmd
@@ -0,0 +1,144 @@
+graph BT
+    N0([start])
+    N1[Market Access Strategy]
+    N2(Distribution)
+    N3[/Good Manufacturing Practices/]
+    N4[/Medical Writing/]
+    N5[Drug Device Combination]
+    N6[(Pharmacovigilance)]
+    N7([Process Validation])
+    N8([Clinical Data Management])
+    N9(Drug Stability Testing)
+    N10[/Intellectual Property Litigation/]
+    N11(Health Economics Outcomes Research)
+    N12([Global Regulatory Affairs])
+    N13[/Packaging/]
+    N14[Regulatory Approval]
+    N15[Manufacturing Scale_up]
+    N16([Formulation Development])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Quality Control
+        nest0_0([Drug Repurposing])
+        nest0_1(Sterile Product Filling)
+        nest0_2[[Drug Research]]
+        nest0_3[Preclinical Testing]
+    end
+    subgraph Post_Approval Commitment Tracking
+        nest1_0[Solid Dosage Formulation]
+        nest1_1[(Sales and Marketing Strategy)]
+        nest1_2[(Active Pharmaceutical Ingredient Production)]
+        nest1_3(Cold Chain Logistics)
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 -.-> N16
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N11 --> nest0_0
+    nest0_3 -.-> N11
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N2 -.-> nest1_0
+    nest1_3 -.-> N15
+    N11 -.-> S0
+    S0 --> N15
+    S0 -.-> N14
+    N5 -.-> S1
+    S1 -.-> N8
+    S1 -.-> N11
+    N2 -.-> M0
+    N0 --> M0
+    N4 --> M0
+    M0 -.-> N6
+    N5 --> M1
+    N3 --> M1
+    N0 --> |researches| M1
+    M1 --> N12
+    style N0 fill:#F0F4C3,stroke:#AED581
+    style N1 fill:#E8F5E9,stroke:#66BB6A
+    style N2 fill:#F0F4C3,stroke:#AED581
+    style N3 fill:#E8F5E9,stroke:#66BB6A
+    style N4 fill:#E8F5E9,stroke:#66BB6A
+    style N5 fill:#FFF0CC,stroke:#FFCC80
+    style N6 fill:#F0F4C3,stroke:#AED581
+    style N7 fill:#E8F5E9,stroke:#66BB6A
+    style N8 fill:#F0F4C3,stroke:#AED581
+    style N9 fill:#FFF0CC,stroke:#FFCC80
+    style N10 fill:#FFF0CC,stroke:#FFCC80
+    style N11 fill:#E8F5E9,stroke:#66BB6A
+    style N12 fill:#FFF0CC,stroke:#FFCC80
+    style N13 fill:#E8F5E9,stroke:#66BB6A
+    style N14 fill:#F0F4C3,stroke:#AED581
+    style N15 fill:#E8F5E9,stroke:#66BB6A
+    style N16 fill:#E8F5E9,stroke:#66BB6A
+    style S0 fill:#FFF0CC,stroke:#FFCC80
+    style S1 fill:#FFF0CC,stroke:#FFCC80
+    style M0 fill:#E8F5E9,stroke:#66BB6A
+    style M1 fill:#E8F5E9,stroke:#66BB6A
+    style nest0_0 fill:#E8F5E9,stroke:#66BB6A
+    style nest0_1 fill:#F0F4C3,stroke:#AED581
+    style nest0_2 fill:#FFF0CC,stroke:#FFCC80
+    style nest0_3 fill:#FFF0CC,stroke:#FFCC80
+    style nest1_0 fill:#FFF0CC,stroke:#FFCC80
+    style nest1_1 fill:#E8F5E9,stroke:#66BB6A
+    style nest1_2 fill:#E8F5E9,stroke:#66BB6A
+    style nest1_3 fill:#FFF0CC,stroke:#FFCC80
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFCC80,stroke-width:2px,fill:none;
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+    linkStyle 5 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#66BB6A,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FFCC80,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_76.txt b/test/mermaid/hard/mermaid_76.txt
new file mode 100644
index 0000000000000000000000000000000000000000..5db8dbd0d81f1889077869d4334deb4e7fce4d97
--- /dev/null
+++ b/test/mermaid/hard/mermaid_76.txt
@@ -0,0 +1,44 @@
+<Active Pharmaceutical Ingredient Production, connectedTo, Cold Chain Logistics>
+<Active Pharmaceutical Ingredient Production, partOf, Post_Approval Commitment Tracking>
+<Clinical Data Management, connectedTo, Drug Stability Testing>
+<Cold Chain Logistics, connectedTo, Manufacturing Scale_up>
+<Cold Chain Logistics, partOf, Post_Approval Commitment Tracking>
+<Distribution, connectedTo, Good Manufacturing Practices>
+<Distribution, connectedTo, Pharmacovigilance>
+<Distribution, connectedTo, Solid Dosage Formulation>
+<Drug Device Combination, connectedTo, Clinical Data Management>
+<Drug Device Combination, connectedTo, Global Regulatory Affairs>
+<Drug Device Combination, connectedTo, Health Economics Outcomes Research>
+<Drug Device Combination, connectedTo, Pharmacovigilance>
+<Drug Repurposing, connectedTo, Sterile Product Filling>
+<Drug Repurposing, partOf, Quality Control>
+<Drug Research, connectedTo, Preclinical Testing>
+<Drug Research, partOf, Quality Control>
+<Drug Stability Testing, connectedTo, Intellectual Property Litigation>
+<Global Regulatory Affairs, connectedTo, Packaging>
+<Good Manufacturing Practices, connectedTo, Global Regulatory Affairs>
+<Good Manufacturing Practices, connectedTo, Medical Writing>
+<Health Economics Outcomes Research, connectedTo, Drug Repurposing>
+<Health Economics Outcomes Research, connectedTo, Global Regulatory Affairs>
+<Health Economics Outcomes Research, connectedTo, Manufacturing Scale_up>
+<Health Economics Outcomes Research, connectedTo, Regulatory Approval>
+<Intellectual Property Litigation, connectedTo, Health Economics Outcomes Research>
+<Manufacturing Scale_up, connectedTo, Formulation Development>
+<Market Access Strategy, connectedTo, Distribution>
+<Medical Writing, connectedTo, Drug Device Combination>
+<Medical Writing, connectedTo, Pharmacovigilance>
+<Packaging, connectedTo, Regulatory Approval>
+<Pharmacovigilance, connectedTo, Process Validation>
+<Preclinical Testing, connectedTo, Health Economics Outcomes Research>
+<Preclinical Testing, partOf, Quality Control>
+<Process Validation, connectedTo, Clinical Data Management>
+<Regulatory Approval, connectedTo, Manufacturing Scale_up>
+<Sales and Marketing Strategy, connectedTo, Active Pharmaceutical Ingredient Production>
+<Sales and Marketing Strategy, partOf, Post_Approval Commitment Tracking>
+<Solid Dosage Formulation, connectedTo, Sales and Marketing Strategy>
+<Solid Dosage Formulation, partOf, Post_Approval Commitment Tracking>
+<Sterile Product Filling, connectedTo, Drug Research>
+<Sterile Product Filling, partOf, Quality Control>
+<start, connectedTo, Market Access Strategy>
+<start, connectedTo, Pharmacovigilance>
+<start, researches, Global Regulatory Affairs>
diff --git a/test/mermaid/hard/mermaid_77.txt b/test/mermaid/hard/mermaid_77.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ac2c8a92107d5c06b0b278d3ef78fcc163ee115c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_77.txt
@@ -0,0 +1,38 @@
+<Active Pharmaceutical Ingredient Production, connectedTo, Good Manufacturing Practices>
+<Active Pharmaceutical Ingredient Production, partOf, Packaging>
+<Audit Management, connectedTo, Clinical Supply Management>
+<Audit Management, partOf, Sterile Product Filling>
+<Clinical Supply Management, connectedTo, Compound Synthesis>
+<Clinical Supply Management, connectedTo, Medical Writing>
+<Clinical Supply Management, connectedTo, end>
+<Clinical Trial Phases, connectedTo, Cold Chain Logistics>
+<Clinical Trial Phases, connectedTo, Intellectual Property Litigation>
+<Clinical Trial Phases, connectedTo, Post_Approval Commitment Tracking>
+<Cold Chain Logistics, connectedTo, Solid Dosage Formulation>
+<Compound Synthesis, connectedTo, end>
+<Counterfeit Drug Detection, yes, Clinical Trial Phases>
+<Distribution, connectedTo, Post_Approval Commitment Tracking>
+<Distribution, connectedTo, Sales and Marketing Strategy>
+<Distribution, connectedTo, end>
+<Drug Research, connectedTo, Health Economics Outcomes Research>
+<Global Regulatory Affairs, connectedTo, Compound Synthesis>
+<Global Regulatory Affairs, connectedTo, Counterfeit Drug Detection>
+<Global Regulatory Affairs, connectedTo, Preclinical Testing>
+<Good Manufacturing Practices, connectedTo, Patient Adherence Programs>
+<Good Manufacturing Practices, partOf, Packaging>
+<Health Economics Outcomes Research, connectedTo, Global Regulatory Affairs>
+<Intellectual Property Litigation, connectedTo, Active Pharmaceutical Ingredient Production>
+<Intellectual Property Litigation, partOf, Packaging>
+<Medical Writing, connectedTo, Compound Synthesis>
+<Patient Adherence Programs, connectedTo, Counterfeit Drug Detection>
+<Patient Adherence Programs, partOf, Packaging>
+<Post_Approval Commitment Tracking, connectedTo, Clinical Supply Management>
+<Preclinical Testing, connectedTo, Quality Control>
+<Preclinical Testing, partOf, Sterile Product Filling>
+<Quality Control, connectedTo, Audit Management>
+<Quality Control, partOf, Sterile Product Filling>
+<Sales and Marketing Strategy, connectedTo, Post_Approval Commitment Tracking>
+<Solid Dosage Formulation, connectedTo, Active Pharmaceutical Ingredient Production>
+<Solid Dosage Formulation, connectedTo, Compound Synthesis>
+<Solid Dosage Formulation, connectedTo, Distribution>
+<start, connectedTo, Drug Research>
diff --git a/test/mermaid/hard/mermaid_78.mmd b/test/mermaid/hard/mermaid_78.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..ed941e7d860595156e195136b83a4891c9c2a2a9
--- /dev/null
+++ b/test/mermaid/hard/mermaid_78.mmd
@@ -0,0 +1,110 @@
+graph BT
+    N0([start])
+    N1[[Drug Stability Testing]]
+    N2[(Good Manufacturing Practices)]
+    N3[Patient Adherence Programs]
+    N4[Audit Management]
+    N5(Distribution)
+    N6([Compound Synthesis])
+    N7[[Drug Device Combination]]
+    N8(Batch Release)
+    N9{Supply Chain Management}
+    N10[(Clinical Trial Phases)]
+    N11{Counterfeit Drug Detection}
+    N12[/Adverse Event Reporting/]
+    N13(Preclinical Testing)
+    N14(Pharmacovigilance)
+    N15{Drug Research}
+    N16([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Formulation Development
+        nest0_0(Clinical Supply Management)
+        nest0_1{Quality Control}
+    end
+    subgraph Health Economics Outcomes Research
+        nest1_0(Intellectual Property Litigation)
+        nest1_1[(Global Regulatory Affairs)]
+        nest1_2(Solid Dosage Formulation)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> |no| N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    N11 --> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 -.-> N16
+    nest0_0 --> nest0_1
+    N5 --> nest0_0
+    nest0_1 --> N9
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N15 --> nest1_0
+    nest1_2 --> N13
+    N13 --> S0
+    S0 --> N15
+    S0 -.-> N16
+    N13 --> S1
+    S1 --> N16
+    S1 --> N15
+    N13 --> S2
+    S2 --> N15
+    S2 --> N16
+    N12 -.-> M1
+    N8 --> M1
+    N9 -.-> M1
+    N5 --> M1
+    M1 -.-> N14
+    style S0 fill:#EDE7F6,stroke:#9575CD
+    style S1 fill:#EDE7F6,stroke:#9575CD
+    style S2 fill:#C9F0F0,stroke:#4DD0E1
+    style M1 fill:#C9F0F0,stroke:#4DD0E1
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#4DD0E1,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#C0CA33,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#4DD0E1,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_78.txt b/test/mermaid/hard/mermaid_78.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e575c469ffc2b9a573b3bad5479d7c67f38fbf7c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_78.txt
@@ -0,0 +1,34 @@
+<Adverse Event Reporting, connectedTo, Pharmacovigilance>
+<Adverse Event Reporting, connectedTo, Preclinical Testing>
+<Audit Management, connectedTo, Distribution>
+<Batch Release, connectedTo, Pharmacovigilance>
+<Batch Release, connectedTo, Supply Chain Management>
+<Clinical Supply Management, connectedTo, Quality Control>
+<Clinical Supply Management, partOf, Formulation Development>
+<Clinical Trial Phases, connectedTo, Counterfeit Drug Detection>
+<Compound Synthesis, connectedTo, Drug Device Combination>
+<Counterfeit Drug Detection, connectedTo, Adverse Event Reporting>
+<Distribution, connectedTo, Clinical Supply Management>
+<Distribution, connectedTo, Compound Synthesis>
+<Distribution, connectedTo, Pharmacovigilance>
+<Drug Device Combination, no, Batch Release>
+<Drug Research, connectedTo, Intellectual Property Litigation>
+<Drug Research, connectedTo, end>
+<Drug Stability Testing, connectedTo, Good Manufacturing Practices>
+<Global Regulatory Affairs, connectedTo, Solid Dosage Formulation>
+<Global Regulatory Affairs, partOf, Health Economics Outcomes Research>
+<Good Manufacturing Practices, connectedTo, Patient Adherence Programs>
+<Intellectual Property Litigation, connectedTo, Global Regulatory Affairs>
+<Intellectual Property Litigation, partOf, Health Economics Outcomes Research>
+<Patient Adherence Programs, connectedTo, Audit Management>
+<Pharmacovigilance, connectedTo, Drug Research>
+<Preclinical Testing, connectedTo, Drug Research>
+<Preclinical Testing, connectedTo, Pharmacovigilance>
+<Preclinical Testing, connectedTo, end>
+<Quality Control, connectedTo, Supply Chain Management>
+<Quality Control, partOf, Formulation Development>
+<Solid Dosage Formulation, connectedTo, Preclinical Testing>
+<Solid Dosage Formulation, partOf, Health Economics Outcomes Research>
+<Supply Chain Management, connectedTo, Clinical Trial Phases>
+<Supply Chain Management, connectedTo, Pharmacovigilance>
+<start, connectedTo, Drug Stability Testing>
diff --git a/test/mermaid/hard/mermaid_79.mmd b/test/mermaid/hard/mermaid_79.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..3cd0087b166f432e57ec7110c79c5403a1f34a33
--- /dev/null
+++ b/test/mermaid/hard/mermaid_79.mmd
@@ -0,0 +1,116 @@
+graph RL
+    N0([start])
+    N1{Embedded Systems Development}
+    N2[Industrial Automation]
+    N3([Robotics Simulation])
+    N4{Artificial Intelligence Integration}
+    N5[Robot Fleet Management]
+    N6[/Agricultural Robotics/]
+    N7[Exoskeleton Development]
+    N8[(Kinematics and Dynamics)]
+    N9[Autonomous Navigation]
+    N10(Robot Assembly)
+    N11(Grasping and Manipulation)
+    N12[Field Deployment]
+    N13([Safety System Implementation])
+    N14([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Drone Control
+        nest0_0(Learning Algorithms)
+        nest0_1([Maintenance])
+        nest0_2[/Underwater Robotics/]
+    end
+    subgraph Software Development
+        nest1_0(System Integration)
+        nest1_1[(Exploration Robotics)]
+        nest1_2[Collaborative Robotics]
+        nest1_3[/Calibration/]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> |no| N9
+    N9 --> N10
+    N10 --> N11
+    N11 --> N12
+    N12 --> N13
+    N13 -.-> N14
+    nest0_0 -.-> |yes| nest0_1
+    nest0_1 -.-> nest0_2
+    N9 -.-> nest0_0
+    nest0_2 -.-> N1
+    nest1_0 --> |yes| nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> nest1_3
+    N6 --> nest1_0
+    nest1_3 --> N6
+    N2 -.-> S0
+    S0 -.-> N10
+    S0 -.-> N13
+    S0 --> N11
+    S0 --> N8
+    N4 -.-> S1
+    S1 --> N12
+    S1 --> N9
+    N6 --> M0
+    N3 -.-> M0
+    N1 --> M0
+    N5 -.-> M0
+    M0 -.-> N10
+    N2 --> |no| M1
+    N1 -.-> M1
+    N3 -.-> M1
+    M1 --> N6
+    style S0 fill:#CFD8DC,stroke:#607D8B
+    style S1 fill:#CFD8DC,stroke:#607D8B
+    style M0 fill:#CFD8DC,stroke:#607D8B
+    style M1 fill:#EDE7F6,stroke:#9575CD
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#607D8B,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#3F51B5,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_79.txt b/test/mermaid/hard/mermaid_79.txt
new file mode 100644
index 0000000000000000000000000000000000000000..cdc706a6aef36d0a227a5a863ee804dda321453b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_79.txt
@@ -0,0 +1,43 @@
+<Agricultural Robotics, connectedTo, Exoskeleton Development>
+<Agricultural Robotics, connectedTo, Robot Assembly>
+<Agricultural Robotics, connectedTo, System Integration>
+<Artificial Intelligence Integration, connectedTo, Autonomous Navigation>
+<Artificial Intelligence Integration, connectedTo, Field Deployment>
+<Artificial Intelligence Integration, connectedTo, Robot Fleet Management>
+<Autonomous Navigation, connectedTo, Learning Algorithms>
+<Autonomous Navigation, connectedTo, Robot Assembly>
+<Calibration, connectedTo, Agricultural Robotics>
+<Calibration, partOf, Software Development>
+<Collaborative Robotics, connectedTo, Calibration>
+<Collaborative Robotics, partOf, Software Development>
+<Embedded Systems Development, connectedTo, Agricultural Robotics>
+<Embedded Systems Development, connectedTo, Industrial Automation>
+<Embedded Systems Development, connectedTo, Robot Assembly>
+<Exoskeleton Development, connectedTo, Kinematics and Dynamics>
+<Exploration Robotics, connectedTo, Collaborative Robotics>
+<Exploration Robotics, partOf, Software Development>
+<Field Deployment, connectedTo, Safety System Implementation>
+<Grasping and Manipulation, connectedTo, Field Deployment>
+<Industrial Automation, connectedTo, Grasping and Manipulation>
+<Industrial Automation, connectedTo, Kinematics and Dynamics>
+<Industrial Automation, connectedTo, Robot Assembly>
+<Industrial Automation, connectedTo, Robotics Simulation>
+<Industrial Automation, connectedTo, Safety System Implementation>
+<Industrial Automation, no, Agricultural Robotics>
+<Kinematics and Dynamics, no, Autonomous Navigation>
+<Learning Algorithms, partOf, Drone Control>
+<Learning Algorithms, yes, Maintenance>
+<Maintenance, connectedTo, Underwater Robotics>
+<Maintenance, partOf, Drone Control>
+<Robot Assembly, connectedTo, Grasping and Manipulation>
+<Robot Fleet Management, connectedTo, Agricultural Robotics>
+<Robot Fleet Management, connectedTo, Robot Assembly>
+<Robotics Simulation, connectedTo, Agricultural Robotics>
+<Robotics Simulation, connectedTo, Artificial Intelligence Integration>
+<Robotics Simulation, connectedTo, Robot Assembly>
+<Safety System Implementation, connectedTo, end>
+<System Integration, partOf, Software Development>
+<System Integration, yes, Exploration Robotics>
+<Underwater Robotics, connectedTo, Embedded Systems Development>
+<Underwater Robotics, partOf, Drone Control>
+<start, connectedTo, Embedded Systems Development>
diff --git a/test/mermaid/hard/mermaid_8.mmd b/test/mermaid/hard/mermaid_8.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..65695fc2347dfc9ce4a3cc70a4670fe0dbecbcbb
--- /dev/null
+++ b/test/mermaid/hard/mermaid_8.mmd
@@ -0,0 +1,124 @@
+graph RL
+    N0([start])
+    N1[Batch Tracking]
+    N2[[Machine Calibration]]
+    N3[[Factory Layout Planning]]
+    N4[Safety Audit]
+    N5[Component Sourcing]
+    N6(Work_in_Progress Monitoring)
+    N7{Robotics Integration}
+    N8([Logistics Planning])
+    N9[Storage]
+    N10[(Parts Replacement)]
+    N11(Automated Assembly)
+    N12(Product Design)
+    N13(Bills of Material Generation)
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Inventory Check
+        nest0_0[/Procurement/]
+        nest0_1[/Environmental Compliance/]
+    end
+    subgraph Defect Analysis
+        nest1_0[Inspection]
+        nest1_1[Welding]
+        nest1_2[(Design Review)]
+        nest1_3(Maintenance)
+    end
+    N0 --> |replaces| N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 -.-> N11
+    N11 --> |plans| N12
+    N12 -.-> N13
+    nest0_0 -.-> nest0_1
+    N10 -.-> nest0_0
+    nest0_1 -.-> N1
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 -.-> nest1_3
+    N6 --> nest1_0
+    nest1_3 --> N12
+    N6 --> S0
+    S0 --> N9
+    S0 --> N13
+    N9 -.-> S1
+    S1 --> N11
+    S1 -.-> N12
+    S1 --> N13
+    N7 --> M0
+    N5 --> M0
+    N1 --> M0
+    M0 -.-> N11
+    N9 --> M1
+    N2 --> M1
+    M1 -.-> N11
+    style N0 fill:#FCFCE7,stroke:#DCE775
+    style N1 fill:#FCFCE7,stroke:#DCE775
+    style N2 fill:#EFE6FF,stroke:#C2B2F0
+    style N3 fill:#FCFCE7,stroke:#DCE775
+    style N4 fill:#FCFCE7,stroke:#DCE775
+    style N5 fill:#FCFCE7,stroke:#DCE775
+    style N6 fill:#FCFCE7,stroke:#DCE775
+    style N7 fill:#FCFCE7,stroke:#DCE775
+    style N8 fill:#EFE6FF,stroke:#C2B2F0
+    style N9 fill:#F5F5DC,stroke:#BCB88A
+    style N10 fill:#FCFCE7,stroke:#DCE775
+    style N11 fill:#EFE6FF,stroke:#C2B2F0
+    style N12 fill:#EFE6FF,stroke:#C2B2F0
+    style N13 fill:#FCFCE7,stroke:#DCE775
+    style S0 fill:#FCFCE7,stroke:#DCE775
+    style S1 fill:#F5F5DC,stroke:#BCB88A
+    style M0 fill:#FCFCE7,stroke:#DCE775
+    style M1 fill:#EFE6FF,stroke:#C2B2F0
+    style nest0_0 fill:#EFE6FF,stroke:#C2B2F0
+    style nest0_1 fill:#EFE6FF,stroke:#C2B2F0
+    style nest1_0 fill:#F5F5DC,stroke:#BCB88A
+    style nest1_1 fill:#EFE6FF,stroke:#C2B2F0
+    style nest1_2 fill:#F5F5DC,stroke:#BCB88A
+    style nest1_3 fill:#FCFCE7,stroke:#DCE775
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#BCB88A,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_8.txt b/test/mermaid/hard/mermaid_8.txt
new file mode 100644
index 0000000000000000000000000000000000000000..95735c940f3a854c8d95553b9adfa8b233cddb86
--- /dev/null
+++ b/test/mermaid/hard/mermaid_8.txt
@@ -0,0 +1,36 @@
+<Automated Assembly, plans, Product Design>
+<Batch Tracking, connectedTo, Automated Assembly>
+<Batch Tracking, connectedTo, Machine Calibration>
+<Component Sourcing, connectedTo, Automated Assembly>
+<Component Sourcing, connectedTo, Work_in_Progress Monitoring>
+<Design Review, connectedTo, Maintenance>
+<Design Review, partOf, Defect Analysis>
+<Environmental Compliance, connectedTo, Batch Tracking>
+<Environmental Compliance, partOf, Inventory Check>
+<Factory Layout Planning, connectedTo, Safety Audit>
+<Inspection, connectedTo, Welding>
+<Inspection, partOf, Defect Analysis>
+<Logistics Planning, connectedTo, Storage>
+<Machine Calibration, connectedTo, Automated Assembly>
+<Machine Calibration, connectedTo, Factory Layout Planning>
+<Maintenance, connectedTo, Product Design>
+<Maintenance, partOf, Defect Analysis>
+<Parts Replacement, connectedTo, Automated Assembly>
+<Parts Replacement, connectedTo, Procurement>
+<Procurement, connectedTo, Environmental Compliance>
+<Procurement, partOf, Inventory Check>
+<Product Design, connectedTo, Bills of Material Generation>
+<Robotics Integration, connectedTo, Automated Assembly>
+<Robotics Integration, connectedTo, Logistics Planning>
+<Safety Audit, connectedTo, Component Sourcing>
+<Storage, connectedTo, Automated Assembly>
+<Storage, connectedTo, Bills of Material Generation>
+<Storage, connectedTo, Parts Replacement>
+<Storage, connectedTo, Product Design>
+<Welding, connectedTo, Design Review>
+<Welding, partOf, Defect Analysis>
+<Work_in_Progress Monitoring, connectedTo, Bills of Material Generation>
+<Work_in_Progress Monitoring, connectedTo, Inspection>
+<Work_in_Progress Monitoring, connectedTo, Robotics Integration>
+<Work_in_Progress Monitoring, connectedTo, Storage>
+<start, replaces, Batch Tracking>
diff --git a/test/mermaid/hard/mermaid_80.mmd b/test/mermaid/hard/mermaid_80.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..75d7d4ec5bf8cc3e68c0fac743997882c4aeeb98
--- /dev/null
+++ b/test/mermaid/hard/mermaid_80.mmd
@@ -0,0 +1,91 @@
+graph RL
+    N0([start])
+    N1[Data Collection]
+    N2([Autonomous Navigation])
+    N3[Human_Robot Interaction]
+    N4([Underwater Robotics])
+    N5([Embedded Systems Development])
+    N6(Collaborative Robotics)
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    subgraph Calibration
+        nest0_0[/Robotics Simulation/]
+        nest0_1(Learning Algorithms)
+        nest0_2(Agricultural Robotics)
+        nest0_3[Swarm Robotics]
+    end
+    subgraph Robot Programming
+        nest1_0{Sensor Integration}
+        nest1_1(Grasping and Manipulation)
+        nest1_2[Exploration Robotics]
+        nest1_3[End_Effector Design]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 --> |no| N4
+    N4 -.-> |yes| N5
+    N5 -.-> N6
+    nest0_0 --> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N5 -.-> |yes| nest0_0
+    nest0_3 -.-> N2
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N5 --> nest1_0
+    nest1_3 --> N5
+    N2 --> S0
+    S0 --> N6
+    S0 --> N5
+    N2 --> S1
+    S1 --> N4
+    S1 --> N5
+    S1 -.-> |yes| N6
+    N0 --> S2
+    S2 --> N3
+    S2 -.-> N4
+    S2 -.-> N6
+    S2 --> N5
+    N2 -.-> M0
+    N1 --> |yes| M0
+    M0 --> N6
+    style S0 fill:#F3E5F5,stroke:#AB47BC
+    style S1 fill:#FFFAE0,stroke:#FFE470
+    style S2 fill:#F3E5F5,stroke:#AB47BC
+    style M0 fill:#FFFAE0,stroke:#FFE470
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FFE470,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#AB47BC,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_80.txt b/test/mermaid/hard/mermaid_80.txt
new file mode 100644
index 0000000000000000000000000000000000000000..3482c36dfd3733fe69840e4e58f3a4ffa9c258b9
--- /dev/null
+++ b/test/mermaid/hard/mermaid_80.txt
@@ -0,0 +1,33 @@
+<Agricultural Robotics, connectedTo, Swarm Robotics>
+<Agricultural Robotics, partOf, Calibration>
+<Autonomous Navigation, connectedTo, Collaborative Robotics>
+<Autonomous Navigation, connectedTo, Embedded Systems Development>
+<Autonomous Navigation, connectedTo, Human_Robot Interaction>
+<Autonomous Navigation, connectedTo, Underwater Robotics>
+<Autonomous Navigation, yes, Collaborative Robotics>
+<Data Collection, connectedTo, Autonomous Navigation>
+<Data Collection, yes, Collaborative Robotics>
+<Embedded Systems Development, connectedTo, Collaborative Robotics>
+<Embedded Systems Development, connectedTo, Sensor Integration>
+<Embedded Systems Development, yes, Robotics Simulation>
+<End_Effector Design, connectedTo, Embedded Systems Development>
+<End_Effector Design, partOf, Robot Programming>
+<Exploration Robotics, connectedTo, End_Effector Design>
+<Exploration Robotics, partOf, Robot Programming>
+<Grasping and Manipulation, connectedTo, Exploration Robotics>
+<Grasping and Manipulation, partOf, Robot Programming>
+<Human_Robot Interaction, no, Underwater Robotics>
+<Learning Algorithms, connectedTo, Agricultural Robotics>
+<Learning Algorithms, partOf, Calibration>
+<Robotics Simulation, connectedTo, Learning Algorithms>
+<Robotics Simulation, partOf, Calibration>
+<Sensor Integration, connectedTo, Grasping and Manipulation>
+<Sensor Integration, partOf, Robot Programming>
+<Swarm Robotics, connectedTo, Autonomous Navigation>
+<Swarm Robotics, partOf, Calibration>
+<Underwater Robotics, yes, Embedded Systems Development>
+<start, connectedTo, Collaborative Robotics>
+<start, connectedTo, Data Collection>
+<start, connectedTo, Embedded Systems Development>
+<start, connectedTo, Human_Robot Interaction>
+<start, connectedTo, Underwater Robotics>
diff --git a/test/mermaid/hard/mermaid_81.mmd b/test/mermaid/hard/mermaid_81.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..8f51212238b53fc45c2edde668652f2d471d7bdd
--- /dev/null
+++ b/test/mermaid/hard/mermaid_81.mmd
@@ -0,0 +1,144 @@
+graph BT
+    N0([start])
+    N1{Calibration}
+    N2(Sensor Integration)
+    N3{Service Robotics}
+    N4[(Battery Management)]
+    N5(Agricultural Robotics)
+    N6[(System Integration)]
+    N7([Exoskeleton Development])
+    N8[/Performance Testing/]
+    N9[Machine Vision]
+    N10(Robotics Simulation)
+    N11[Embedded Systems Development]
+    N12[/Wireless Communication/]
+    N13[End_Effector Design]
+    N14[Robot Programming]
+    N15[Exploration Robotics]
+    N16([Force Control])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Human_Robot Interaction
+        nest0_0[Kinematics and Dynamics]
+        nest0_1(Fault Detection and Diagnosis)
+    end
+    subgraph Collaborative Robotics
+        nest1_0{Safety System Implementation}
+        nest1_1[(Maintenance)]
+        nest1_2([Swarm Robotics])
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> |researches| N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 -.-> N15
+    N15 -.-> N16
+    nest0_0 --> |disassembles| nest0_1
+    N12 -.-> nest0_0
+    nest0_1 -.-> N9
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N1 -.-> nest1_0
+    nest1_2 --> N10
+    N1 -.-> S0
+    S0 -.-> N7
+    S0 -.-> N15
+    N8 --> S1
+    S1 --> N11
+    S1 --> N15
+    S1 --> N14
+    N10 --> S2
+    S2 --> N16
+    S2 --> N14
+    N8 --> M0
+    N6 --> M0
+    N5 -.-> M0
+    N9 -.-> M0
+    M0 --> N14
+    N6 -.-> M1
+    N9 -.-> M1
+    N10 --> M1
+    M1 --> N14
+    style N0 fill:#FAEBF3,stroke:#F7BEE0
+    style N1 fill:#FAEBF3,stroke:#F7BEE0
+    style N2 fill:#F8FDD3,stroke:#D3EB9F
+    style N3 fill:#FFF0CC,stroke:#FFCC80
+    style N4 fill:#FFF0CC,stroke:#FFCC80
+    style N5 fill:#FAEBF3,stroke:#F7BEE0
+    style N6 fill:#F8FDD3,stroke:#D3EB9F
+    style N7 fill:#FAEBF3,stroke:#F7BEE0
+    style N8 fill:#FAEBF3,stroke:#F7BEE0
+    style N9 fill:#FAEBF3,stroke:#F7BEE0
+    style N10 fill:#FFF0CC,stroke:#FFCC80
+    style N11 fill:#F8FDD3,stroke:#D3EB9F
+    style N12 fill:#FFF0CC,stroke:#FFCC80
+    style N13 fill:#FFF0CC,stroke:#FFCC80
+    style N14 fill:#FFF0CC,stroke:#FFCC80
+    style N15 fill:#FAEBF3,stroke:#F7BEE0
+    style N16 fill:#F8FDD3,stroke:#D3EB9F
+    style S0 fill:#FAEBF3,stroke:#F7BEE0
+    style S1 fill:#F8FDD3,stroke:#D3EB9F
+    style S2 fill:#FFF0CC,stroke:#FFCC80
+    style M0 fill:#FAEBF3,stroke:#F7BEE0
+    style M1 fill:#FAEBF3,stroke:#F7BEE0
+    style nest0_0 fill:#F8FDD3,stroke:#D3EB9F
+    style nest0_1 fill:#FAEBF3,stroke:#F7BEE0
+    style nest1_0 fill:#F8FDD3,stroke:#D3EB9F
+    style nest1_1 fill:#FFF0CC,stroke:#FFCC80
+    style nest1_2 fill:#FFF0CC,stroke:#FFCC80
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FFCC80,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#D3EB9F,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#FFCC80,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_81.txt b/test/mermaid/hard/mermaid_81.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b813101f4cfb0cde71bedd1ebb09ea6f346f4e84
--- /dev/null
+++ b/test/mermaid/hard/mermaid_81.txt
@@ -0,0 +1,38 @@
+<Agricultural Robotics, connectedTo, Robot Programming>
+<Agricultural Robotics, connectedTo, System Integration>
+<Battery Management, connectedTo, Agricultural Robotics>
+<Calibration, connectedTo, Exoskeleton Development>
+<Calibration, connectedTo, Exploration Robotics>
+<Calibration, connectedTo, Safety System Implementation>
+<Calibration, connectedTo, Sensor Integration>
+<Embedded Systems Development, connectedTo, Wireless Communication>
+<End_Effector Design, connectedTo, Robot Programming>
+<Exoskeleton Development, connectedTo, Performance Testing>
+<Exploration Robotics, connectedTo, Force Control>
+<Fault Detection and Diagnosis, connectedTo, Machine Vision>
+<Fault Detection and Diagnosis, partOf, Human_Robot Interaction>
+<Kinematics and Dynamics, disassembles, Fault Detection and Diagnosis>
+<Kinematics and Dynamics, partOf, Human_Robot Interaction>
+<Machine Vision, connectedTo, Robot Programming>
+<Machine Vision, connectedTo, Robotics Simulation>
+<Maintenance, connectedTo, Swarm Robotics>
+<Maintenance, partOf, Collaborative Robotics>
+<Performance Testing, connectedTo, Embedded Systems Development>
+<Performance Testing, connectedTo, Exploration Robotics>
+<Performance Testing, connectedTo, Machine Vision>
+<Performance Testing, connectedTo, Robot Programming>
+<Robot Programming, connectedTo, Exploration Robotics>
+<Robotics Simulation, connectedTo, Force Control>
+<Robotics Simulation, connectedTo, Robot Programming>
+<Robotics Simulation, researches, Embedded Systems Development>
+<Safety System Implementation, connectedTo, Maintenance>
+<Safety System Implementation, partOf, Collaborative Robotics>
+<Sensor Integration, connectedTo, Service Robotics>
+<Service Robotics, connectedTo, Battery Management>
+<Swarm Robotics, connectedTo, Robotics Simulation>
+<Swarm Robotics, partOf, Collaborative Robotics>
+<System Integration, connectedTo, Exoskeleton Development>
+<System Integration, connectedTo, Robot Programming>
+<Wireless Communication, connectedTo, End_Effector Design>
+<Wireless Communication, connectedTo, Kinematics and Dynamics>
+<start, connectedTo, Calibration>
diff --git a/test/mermaid/hard/mermaid_82.mmd b/test/mermaid/hard/mermaid_82.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..58148297d13fa0e3f92858f238f3be52c83d8551
--- /dev/null
+++ b/test/mermaid/hard/mermaid_82.mmd
@@ -0,0 +1,144 @@
+graph BT
+    N0([Landscape Design])
+    N1[[Occupancy Permit Acquisition]]
+    N2[/Site Planning/]
+    N3[[Project Scheduling]]
+    N4{Foundation Laying}
+    N5([Plumbing Work])
+    N6(Facade Installation)
+    N7(Interior Finishing)
+    N8(Risk Assessment)
+    N9([HVAC Installation])
+    N10[Post_Construction Handover]
+    N11[(Quality Assurance)]
+    N12([Blueprint Review])
+    N13[/BIM Modeling/]
+    N14(Excavation)
+    N15(Roofing Installation)
+    N16(Tunneling)
+    N17([Punch List Completion])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Change Order Management
+        nest0_0[[Subcontractor Management]]
+        nest0_1[[Site Logistics]]
+        nest0_2[/Bridge Building/]
+    end
+    subgraph Electrical Wiring
+        nest1_0[Structural Framing]
+        nest1_1[[Concrete Pouring]]
+        nest1_2{Pre_fabrication}
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    N13 -.-> N14
+    N14 --> |schedules| N15
+    N15 --> N16
+    N16 --> N17
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N8 --> nest0_0
+    nest0_2 -.-> N1
+    nest1_0 --> nest1_1
+    nest1_1 -.-> nest1_2
+    N7 --> |estimates| nest1_0
+    nest1_2 --> N6
+    N8 -.-> S0
+    S0 --> N11
+    S0 -.-> N13
+    N14 --> S1
+    S1 -.-> N17
+    S1 -.-> N16
+    N10 -.-> S2
+    S2 --> N16
+    S2 -.-> N13
+    N0 -.-> M0
+    N8 -.-> M0
+    M0 --> N12
+    N10 --> M1
+    N13 --> M1
+    M1 -.-> N16
+    style N0 fill:#FFCCBC,stroke:#FF5722
+    style N1 fill:#FFF9C4,stroke:#FFEB3B
+    style N2 fill:#FFF9C4,stroke:#FFEB3B
+    style N3 fill:#FFCCBC,stroke:#FF5722
+    style N4 fill:#D3F7F9,stroke:#80DDEA
+    style N5 fill:#D3F7F9,stroke:#80DDEA
+    style N6 fill:#FFCCBC,stroke:#FF5722
+    style N7 fill:#D3F7F9,stroke:#80DDEA
+    style N8 fill:#FFF9C4,stroke:#FFEB3B
+    style N9 fill:#FFCCBC,stroke:#FF5722
+    style N10 fill:#FFF9C4,stroke:#FFEB3B
+    style N11 fill:#FFF9C4,stroke:#FFEB3B
+    style N12 fill:#FFCCBC,stroke:#FF5722
+    style N13 fill:#D3F7F9,stroke:#80DDEA
+    style N14 fill:#FFCCBC,stroke:#FF5722
+    style N15 fill:#FFCCBC,stroke:#FF5722
+    style N16 fill:#FFF9C4,stroke:#FFEB3B
+    style N17 fill:#FFCCBC,stroke:#FF5722
+    style S0 fill:#FFF9C4,stroke:#FFEB3B
+    style S1 fill:#FFF9C4,stroke:#FFEB3B
+    style S2 fill:#D3F7F9,stroke:#80DDEA
+    style M0 fill:#FFF9C4,stroke:#FFEB3B
+    style M1 fill:#FFCCBC,stroke:#FF5722
+    style nest0_0 fill:#D3F7F9,stroke:#80DDEA
+    style nest0_1 fill:#D3F7F9,stroke:#80DDEA
+    style nest0_2 fill:#FFF9C4,stroke:#FFEB3B
+    style nest1_0 fill:#FFF9C4,stroke:#FFEB3B
+    style nest1_1 fill:#D3F7F9,stroke:#80DDEA
+    style nest1_2 fill:#FFF9C4,stroke:#FFEB3B
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FFEB3B,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FF5722,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#FFEB3B,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_83.mmd b/test/mermaid/hard/mermaid_83.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..4fbd9a3f8818a2004fb7a25827a8507c93b9fcd7
--- /dev/null
+++ b/test/mermaid/hard/mermaid_83.mmd
@@ -0,0 +1,162 @@
+graph BT
+    N0([Bridge Building])
+    N1(Concrete Pouring)
+    N2[Electrical Wiring]
+    N3[[Plumbing Work]]
+    N4(Safety Inspection)
+    N5[Foundation Laying]
+    N6[Occupancy Permit Acquisition]
+    N7[(Excavation)]
+    N8[Site Decontamination]
+    N9{Demolition}
+    N10[/Budget Tracking/]
+    N11[(Drone Surveying)]
+    N12[Site Planning]
+    N13{Roofing Installation}
+    N14(Structural Framing)
+    N15([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph HVAC Installation
+        nest0_0[Facade Installation]
+        nest0_1[Post_Construction Handover]
+        nest0_2[(Change Order Management)]
+        nest0_3{Pre_fabrication}
+    end
+    subgraph Sustainable Building Design
+        nest1_0[(Permit Application)]
+        nest1_1[[Landscape Design]]
+        nest1_2(Utility Connection)
+    end
+    N0 --> N1
+    N1 -.-> |complies| N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> |safety| N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 -.-> |permits| N10
+    N10 --> N11
+    N11 --> N12
+    N12 -.-> N13
+    N13 -.-> |excavates| N14
+    N14 --> N15
+    nest0_0 -.-> |renovates| nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N11 -.-> nest0_0
+    nest0_3 --> N4
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N6 --> nest1_0
+    nest1_2 --> N8
+    N12 --> S0
+    S0 --> N15
+    S0 --> N14
+    N9 -.-> S1
+    S1 -.-> N11
+    S1 --> N12
+    S1 -.-> N14
+    S1 --> N13
+    N1 -.-> S2
+    S2 --> N7
+    S2 -.-> N10
+    S2 -.-> N12
+    S2 -.-> N9
+    N2 -.-> M0
+    N6 --> M0
+    N1 --> M0
+    M0 -.-> N8
+    N0 --> M1
+    N1 --> M1
+    M1 -.-> N3
+    N0 -.-> M2
+    N7 --> M2
+    N9 -.-> |coordinates| M2
+    N3 -.-> M2
+    M2 -.-> N11
+    style N0 fill:#F0F4C3,stroke:#AED581
+    style N1 fill:#DFE7EB,stroke:#B0C5CD
+    style N2 fill:#F1F8E9,stroke:#81C784
+    style N3 fill:#F1F8E9,stroke:#81C784
+    style N4 fill:#F1F8E9,stroke:#81C784
+    style N5 fill:#F0F4C3,stroke:#AED581
+    style N6 fill:#DFE7EB,stroke:#B0C5CD
+    style N7 fill:#DFE7EB,stroke:#B0C5CD
+    style N8 fill:#F1F8E9,stroke:#81C784
+    style N9 fill:#DFE7EB,stroke:#B0C5CD
+    style N10 fill:#DFE7EB,stroke:#B0C5CD
+    style N11 fill:#F0F4C3,stroke:#AED581
+    style N12 fill:#DFE7EB,stroke:#B0C5CD
+    style N13 fill:#F1F8E9,stroke:#81C784
+    style N14 fill:#F0F4C3,stroke:#AED581
+    style N15 fill:#DFE7EB,stroke:#B0C5CD
+    style S0 fill:#DFE7EB,stroke:#B0C5CD
+    style S1 fill:#F0F4C3,stroke:#AED581
+    style S2 fill:#F1F8E9,stroke:#81C784
+    style M0 fill:#F1F8E9,stroke:#81C784
+    style M1 fill:#DFE7EB,stroke:#B0C5CD
+    style M2 fill:#F1F8E9,stroke:#81C784
+    style nest0_0 fill:#DFE7EB,stroke:#B0C5CD
+    style nest0_1 fill:#DFE7EB,stroke:#B0C5CD
+    style nest0_2 fill:#F1F8E9,stroke:#81C784
+    style nest0_3 fill:#DFE7EB,stroke:#B0C5CD
+    style nest1_0 fill:#DFE7EB,stroke:#B0C5CD
+    style nest1_1 fill:#F0F4C3,stroke:#AED581
+    style nest1_2 fill:#F0F4C3,stroke:#AED581
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 41 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 42 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 43 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 44 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 45 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 46 stroke:#B0C5CD,stroke-width:2px,fill:none;
+    linkStyle 47 stroke:#81C784,stroke-width:2px,fill:none;
+    linkStyle 48 stroke:#B0C5CD,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_83.txt b/test/mermaid/hard/mermaid_83.txt
new file mode 100644
index 0000000000000000000000000000000000000000..06e48af0cd91890786a9c18885f4b0802e1e2662
--- /dev/null
+++ b/test/mermaid/hard/mermaid_83.txt
@@ -0,0 +1,50 @@
+<Bridge Building, connectedTo, Concrete Pouring>
+<Bridge Building, connectedTo, Drone Surveying>
+<Bridge Building, connectedTo, Plumbing Work>
+<Budget Tracking, connectedTo, Drone Surveying>
+<Change Order Management, connectedTo, Pre_fabrication>
+<Change Order Management, partOf, HVAC Installation>
+<Concrete Pouring, complies, Electrical Wiring>
+<Concrete Pouring, connectedTo, Budget Tracking>
+<Concrete Pouring, connectedTo, Demolition>
+<Concrete Pouring, connectedTo, Excavation>
+<Concrete Pouring, connectedTo, Plumbing Work>
+<Concrete Pouring, connectedTo, Site Decontamination>
+<Concrete Pouring, connectedTo, Site Planning>
+<Demolition, connectedTo, Drone Surveying>
+<Demolition, connectedTo, Roofing Installation>
+<Demolition, connectedTo, Site Planning>
+<Demolition, connectedTo, Structural Framing>
+<Demolition, coordinates, Drone Surveying>
+<Demolition, permits, Budget Tracking>
+<Drone Surveying, connectedTo, Facade Installation>
+<Drone Surveying, connectedTo, Site Planning>
+<Electrical Wiring, connectedTo, Plumbing Work>
+<Electrical Wiring, connectedTo, Site Decontamination>
+<Excavation, connectedTo, Drone Surveying>
+<Excavation, connectedTo, Site Decontamination>
+<Facade Installation, partOf, HVAC Installation>
+<Facade Installation, renovates, Post_Construction Handover>
+<Foundation Laying, safety, Occupancy Permit Acquisition>
+<Landscape Design, connectedTo, Utility Connection>
+<Landscape Design, partOf, Sustainable Building Design>
+<Occupancy Permit Acquisition, connectedTo, Excavation>
+<Occupancy Permit Acquisition, connectedTo, Permit Application>
+<Occupancy Permit Acquisition, connectedTo, Site Decontamination>
+<Permit Application, connectedTo, Landscape Design>
+<Permit Application, partOf, Sustainable Building Design>
+<Plumbing Work, connectedTo, Drone Surveying>
+<Plumbing Work, connectedTo, Safety Inspection>
+<Post_Construction Handover, connectedTo, Change Order Management>
+<Post_Construction Handover, partOf, HVAC Installation>
+<Pre_fabrication, connectedTo, Safety Inspection>
+<Pre_fabrication, partOf, HVAC Installation>
+<Roofing Installation, excavates, Structural Framing>
+<Safety Inspection, connectedTo, Foundation Laying>
+<Site Decontamination, connectedTo, Demolition>
+<Site Planning, connectedTo, Roofing Installation>
+<Site Planning, connectedTo, Structural Framing>
+<Site Planning, connectedTo, end>
+<Structural Framing, connectedTo, end>
+<Utility Connection, connectedTo, Site Decontamination>
+<Utility Connection, partOf, Sustainable Building Design>
diff --git a/test/mermaid/hard/mermaid_84.mmd b/test/mermaid/hard/mermaid_84.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..7f553f8517c1ef7a33cf44d34b0327a0d5765d2e
--- /dev/null
+++ b/test/mermaid/hard/mermaid_84.mmd
@@ -0,0 +1,94 @@
+graph TD
+    N0([start])
+    N1(Budget Tracking)
+    N2[Roofing Installation]
+    N3(Plumbing Work)
+    N4([Safety Inspection])
+    N5[Structural Framing]
+    N6(Occupancy Permit Acquisition)
+    N7[/Robotics in Construction/]
+    N8[/Sustainable Building Design/]
+    N9(Bridge Building)
+    N10(Subcontractor Management)
+    N11(Foundation Laying)
+    N12{Risk Assessment}
+    N13([end])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Post_Construction Handover
+        nest0_0[Excavation]
+        nest0_1([Steel Erection])
+    end
+    subgraph Material Procurement
+        nest1_0([Equipment Mobilization])
+        nest1_1[/Quality Assurance/]
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 -.-> N8
+    N8 --> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 -.-> N12
+    N12 -.-> N13
+    nest0_0 -.-> |yes| nest0_1
+    N8 --> nest0_0
+    nest0_1 -.-> N7
+    nest1_0 --> nest1_1
+    N3 -.-> nest1_0
+    nest1_1 -.-> N1
+    N7 -.-> S0
+    S0 -.-> N13
+    S0 -.-> N9
+    N3 -.-> S1
+    S1 -.-> |no| N7
+    S1 -.-> N12
+    N3 --> |no| M0
+    N0 -.-> M0
+    M0 --> N7
+    N0 -.-> M2
+    N1 -.-> M2
+    M2 -.-> N3
+    style S0 fill:#E0F2F1,stroke:#4DB6AC
+    style S1 fill:#E0F2F1,stroke:#4DB6AC
+    style M0 fill:#E0F2F1,stroke:#4DB6AC
+    style M2 fill:#FFF3E0,stroke:#FFB74D
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFB74D,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#4DB6AC,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFE69C,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#FFB74D,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_84.txt b/test/mermaid/hard/mermaid_84.txt
new file mode 100644
index 0000000000000000000000000000000000000000..d4e440f893cad40f5ca61dd7baa6359f4351e8a9
--- /dev/null
+++ b/test/mermaid/hard/mermaid_84.txt
@@ -0,0 +1,30 @@
+<Bridge Building, connectedTo, Subcontractor Management>
+<Budget Tracking, connectedTo, Plumbing Work>
+<Budget Tracking, connectedTo, Roofing Installation>
+<Equipment Mobilization, connectedTo, Quality Assurance>
+<Equipment Mobilization, partOf, Material Procurement>
+<Excavation, partOf, Post_Construction Handover>
+<Excavation, yes, Steel Erection>
+<Foundation Laying, connectedTo, Risk Assessment>
+<Occupancy Permit Acquisition, connectedTo, Robotics in Construction>
+<Plumbing Work, connectedTo, Equipment Mobilization>
+<Plumbing Work, connectedTo, Risk Assessment>
+<Plumbing Work, connectedTo, Safety Inspection>
+<Plumbing Work, no, Robotics in Construction>
+<Quality Assurance, connectedTo, Budget Tracking>
+<Quality Assurance, partOf, Material Procurement>
+<Risk Assessment, connectedTo, end>
+<Robotics in Construction, connectedTo, Bridge Building>
+<Robotics in Construction, connectedTo, Sustainable Building Design>
+<Robotics in Construction, connectedTo, end>
+<Roofing Installation, connectedTo, Plumbing Work>
+<Safety Inspection, connectedTo, Structural Framing>
+<Steel Erection, connectedTo, Robotics in Construction>
+<Steel Erection, partOf, Post_Construction Handover>
+<Structural Framing, connectedTo, Occupancy Permit Acquisition>
+<Subcontractor Management, connectedTo, Foundation Laying>
+<Sustainable Building Design, connectedTo, Bridge Building>
+<Sustainable Building Design, connectedTo, Excavation>
+<start, connectedTo, Budget Tracking>
+<start, connectedTo, Plumbing Work>
+<start, connectedTo, Robotics in Construction>
diff --git a/test/mermaid/hard/mermaid_86.mmd b/test/mermaid/hard/mermaid_86.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..5e2ca7eca5ce83f88c2009066237897a4b453212
--- /dev/null
+++ b/test/mermaid/hard/mermaid_86.mmd
@@ -0,0 +1,120 @@
+graph LR
+    N0([start])
+    N1{Cross_Platform Syndication}
+    N2[/Game Streaming/]
+    N3(Media Consumption Trends Analysis)
+    N4[(Radio Programming)]
+    N5[[Audience Segmentation]]
+    N6(Brand Partnerships)
+    N7(Content Licensing)
+    N8[/Print Layout/]
+    N9([Film Production])
+    N10[(Analytics Reporting)]
+    N11{Public Relations}
+    N12[[Advertising Sales]]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Sound Design
+        nest0_0[/User Generated Content Curation/]
+        nest0_1[/Audience Engagement/]
+    end
+    subgraph Copyright Management
+        nest1_0[Subscription Management]
+        nest1_1[Journalism]
+        nest1_2(Broadcasting)
+    end
+    N0 -.-> |audits| N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> N12
+    nest0_0 --> |distributes| nest0_1
+    N3 -.-> nest0_0
+    nest0_1 -.-> |writes| N8
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N4 -.-> nest1_0
+    nest1_2 -.-> N7
+    N6 --> S0
+    S0 --> N9
+    S0 --> N12
+    S0 --> N8
+    N0 -.-> S1
+    S1 --> N11
+    S1 --> N4
+    S1 -.-> N8
+    N0 --> M0
+    N2 -.-> M0
+    N1 -.-> M0
+    M0 -.-> N4
+    N6 -.-> M1
+    N1 --> M1
+    N4 --> M1
+    M1 --> N12
+    style N0 fill:#D1C4E9,stroke:#7E57C2
+    style N1 fill:#F5F5F5,stroke:#BDBDBD
+    style N2 fill:#FFDCD6,stroke:#FFB2A5
+    style N3 fill:#D1C4E9,stroke:#7E57C2
+    style N4 fill:#D1C4E9,stroke:#7E57C2
+    style N5 fill:#FFDCD6,stroke:#FFB2A5
+    style N6 fill:#D1C4E9,stroke:#7E57C2
+    style N7 fill:#D1C4E9,stroke:#7E57C2
+    style N8 fill:#D1C4E9,stroke:#7E57C2
+    style N9 fill:#D1C4E9,stroke:#7E57C2
+    style N10 fill:#F5F5F5,stroke:#BDBDBD
+    style N11 fill:#F5F5F5,stroke:#BDBDBD
+    style N12 fill:#F5F5F5,stroke:#BDBDBD
+    style S0 fill:#FFDCD6,stroke:#FFB2A5
+    style S1 fill:#FFDCD6,stroke:#FFB2A5
+    style M0 fill:#D1C4E9,stroke:#7E57C2
+    style M1 fill:#FFDCD6,stroke:#FFB2A5
+    style nest0_0 fill:#FFDCD6,stroke:#FFB2A5
+    style nest0_1 fill:#D1C4E9,stroke:#7E57C2
+    style nest1_0 fill:#D1C4E9,stroke:#7E57C2
+    style nest1_1 fill:#D1C4E9,stroke:#7E57C2
+    style nest1_2 fill:#FFDCD6,stroke:#FFB2A5
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#FFB2A5,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#BDBDBD,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#7E57C2,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_86.txt b/test/mermaid/hard/mermaid_86.txt
new file mode 100644
index 0000000000000000000000000000000000000000..3ae32be015b02d7bf08db58ef798055d601fcf02
--- /dev/null
+++ b/test/mermaid/hard/mermaid_86.txt
@@ -0,0 +1,34 @@
+<Analytics Reporting, connectedTo, Public Relations>
+<Audience Engagement, partOf, Sound Design>
+<Audience Engagement, writes, Print Layout>
+<Audience Segmentation, connectedTo, Brand Partnerships>
+<Brand Partnerships, connectedTo, Advertising Sales>
+<Brand Partnerships, connectedTo, Content Licensing>
+<Brand Partnerships, connectedTo, Film Production>
+<Brand Partnerships, connectedTo, Print Layout>
+<Broadcasting, connectedTo, Content Licensing>
+<Broadcasting, partOf, Copyright Management>
+<Content Licensing, connectedTo, Print Layout>
+<Cross_Platform Syndication, connectedTo, Advertising Sales>
+<Cross_Platform Syndication, connectedTo, Game Streaming>
+<Cross_Platform Syndication, connectedTo, Radio Programming>
+<Film Production, connectedTo, Analytics Reporting>
+<Game Streaming, connectedTo, Media Consumption Trends Analysis>
+<Game Streaming, connectedTo, Radio Programming>
+<Journalism, connectedTo, Broadcasting>
+<Journalism, partOf, Copyright Management>
+<Media Consumption Trends Analysis, connectedTo, Radio Programming>
+<Media Consumption Trends Analysis, connectedTo, User Generated Content Curation>
+<Print Layout, connectedTo, Film Production>
+<Public Relations, connectedTo, Advertising Sales>
+<Radio Programming, connectedTo, Advertising Sales>
+<Radio Programming, connectedTo, Audience Segmentation>
+<Radio Programming, connectedTo, Subscription Management>
+<Subscription Management, connectedTo, Journalism>
+<Subscription Management, partOf, Copyright Management>
+<User Generated Content Curation, distributes, Audience Engagement>
+<User Generated Content Curation, partOf, Sound Design>
+<start, audits, Cross_Platform Syndication>
+<start, connectedTo, Print Layout>
+<start, connectedTo, Public Relations>
+<start, connectedTo, Radio Programming>
diff --git a/test/mermaid/hard/mermaid_87.txt b/test/mermaid/hard/mermaid_87.txt
new file mode 100644
index 0000000000000000000000000000000000000000..ac3245e42ff0d04c2e6167b5048c1b4fa6084554
--- /dev/null
+++ b/test/mermaid/hard/mermaid_87.txt
@@ -0,0 +1,37 @@
+<Advertising Sales, connectedTo, Crisis Communication>
+<Analytics Reporting, connectedTo, Music Recording>
+<Analytics Reporting, partOf, Platform Development>
+<Audience Segmentation, creates, Broadcasting>
+<Audience Segmentation, partOf, Film Production>
+<Augmented Reality Experiences, connectedTo, Photojournalism>
+<Broadcasting, connectedTo, Augmented Reality Experiences>
+<Broadcasting, partOf, Film Production>
+<Content Creation, connectedTo, Visual Effects>
+<Content Licensing, connectedTo, Music Recording>
+<Content Licensing, connectedTo, Print Layout>
+<Content Licensing, innovates, Crisis Communication>
+<Crisis Communication, connectedTo, Print Layout>
+<Data Monetization, connectedTo, Interactive Storytelling>
+<Digital Marketing, connectedTo, Sound Design>
+<Digital Marketing, engages, Publishing>
+<Distribution, connectedTo, Analytics Reporting>
+<Distribution, partOf, Platform Development>
+<Interactive Storytelling, connectedTo, Sound Design>
+<Media Consumption Trends Analysis, connectedTo, Audience Segmentation>
+<Media Consumption Trends Analysis, connectedTo, Radio Programming>
+<Music Recording, connectedTo, Advertising Sales>
+<Music Recording, connectedTo, Content Creation>
+<Music Recording, connectedTo, Crisis Communication>
+<Music Recording, designs, Visual Effects>
+<Photojournalism, protects, Content Creation>
+<Print Layout, connectedTo, Augmented Reality Experiences>
+<Publishing, connectedTo, Media Consumption Trends Analysis>
+<Radio Programming, connectedTo, Talent Management>
+<Scriptwriting, connectedTo, Data Monetization>
+<Scriptwriting, connectedTo, Sound Design>
+<Sound Design, connectedTo, Distribution>
+<Sound Design, connectedTo, Print Layout>
+<Sound Design, connectedTo, Visual Effects>
+<Sound Design, secures, Content Licensing>
+<Talent Management, connectedTo, Scriptwriting>
+<Talent Management, connectedTo, Sound Design>
diff --git a/test/mermaid/hard/mermaid_88.txt b/test/mermaid/hard/mermaid_88.txt
new file mode 100644
index 0000000000000000000000000000000000000000..45eb30c944aff1147de0b0970aeab2d7553390bc
--- /dev/null
+++ b/test/mermaid/hard/mermaid_88.txt
@@ -0,0 +1,35 @@
+<Beverage Production, connectedTo, Branding and Marketing>
+<Branding and Marketing, connectedTo, Ingredient Sourcing>
+<Catering Operations, connectedTo, Distribution>
+<Catering Operations, partOf, Cuisine Innovation>
+<Cooking, connectedTo, end>
+<Delivery Service Coordination, no, Beverage Production>
+<Delivery Service Coordination, partOf, Recipe Development>
+<Dietary Requirement Accommodation, connectedTo, Ingredient Sourcing>
+<Dietary Requirement Accommodation, partOf, Cuisine Innovation>
+<Distribution, connectedTo, Dietary Requirement Accommodation>
+<Distribution, partOf, Cuisine Innovation>
+<Food Safety Inspection, connectedTo, Cooking>
+<Food Safety Inspection, connectedTo, end>
+<Food Safety Inspection, no, Sensory Evaluation>
+<Ingredient Sourcing, connectedTo, Catering Operations>
+<Ingredient Sourcing, connectedTo, Cooking>
+<Ingredient Sourcing, connectedTo, Food Safety Inspection>
+<Ingredient Sourcing, connectedTo, Sensory Evaluation>
+<Ingredient Sourcing, no, Kitchen Hygiene>
+<Kitchen Hygiene, connectedTo, Food Safety Inspection>
+<New Product Launch, connectedTo, Delivery Service Coordination>
+<New Product Launch, partOf, Recipe Development>
+<Quality Control, connectedTo, Storage Solutions>
+<Quality Control, connectedTo, Sustainable Sourcing>
+<Regulatory Compliance, connectedTo, Beverage Production>
+<Sensory Evaluation, connectedTo, Cooking>
+<Storage Solutions, connectedTo, Branding and Marketing>
+<Storage Solutions, connectedTo, Ingredient Sourcing>
+<Storage Solutions, connectedTo, New Product Launch>
+<Storage Solutions, connectedTo, Sensory Evaluation>
+<Storage Solutions, connectedTo, Sustainable Sourcing>
+<Storage Solutions, no, Food Safety Inspection>
+<Sustainable Sourcing, connectedTo, Regulatory Compliance>
+<start, connectedTo, Sustainable Sourcing>
+<start, yes, Quality Control>
diff --git a/test/mermaid/hard/mermaid_89.mmd b/test/mermaid/hard/mermaid_89.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..51bbe9f715787bacc5f840c2035cfea447413483
--- /dev/null
+++ b/test/mermaid/hard/mermaid_89.mmd
@@ -0,0 +1,132 @@
+graph LR
+    N0([Branding and Marketing])
+    N1[Menu Planning]
+    N2(Baking)
+    N3([Catering Operations])
+    N4(Brewing)
+    N5(Waste Reduction)
+    N6[(Restaurant Reservation System)]
+    N7[Allergen Management]
+    N8[Service Delivery]
+    N9[Food Packaging Design]
+    N10(Product Shelf_Life Testing)
+    N11[/Recipe Development/]
+    N12[[Distribution]]
+    N13[Sensory Evaluation]
+    N14([Food Processing Automation])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M1(( ))
+    subgraph Food Preparation
+        nest0_0([Cooking])
+        nest0_1[Delivery Service Coordination]
+        nest0_2[(Food Preservation)]
+        nest0_3[Packaging]
+    end
+    subgraph Customer Order Taking
+        nest1_0[New Product Launch]
+        nest1_1[(Quality Control)]
+        nest1_2[Dietary Requirement Accommodation]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> |harvests| N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> |complies| N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 --> N14
+    nest0_0 -.-> |sanitizes| nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N3 --> nest0_0
+    nest0_3 --> |promotes| N3
+    nest1_0 --> nest1_1
+    nest1_1 --> nest1_2
+    N9 -.-> nest1_0
+    nest1_2 -.-> |transports| N9
+    N0 --> S0
+    S0 --> N12
+    S0 --> |ingredients| N10
+    S0 -.-> N8
+    N1 -.-> S1
+    S1 --> N11
+    S1 --> N7
+    N4 -.-> S2
+    S2 --> N7
+    S2 --> N6
+    N6 -.-> M1
+    N2 -.-> M1
+    N5 --> |regulates| M1
+    M1 --> N11
+    style N0 fill:#D3F7F9,stroke:#80DDEA
+    style N1 fill:#D3F7F9,stroke:#80DDEA
+    style N2 fill:#FCE4EC,stroke:#E91E63
+    style N3 fill:#E8F0FF,stroke:#A2D0FF
+    style N4 fill:#E8F0FF,stroke:#A2D0FF
+    style N5 fill:#D3F7F9,stroke:#80DDEA
+    style N6 fill:#D3F7F9,stroke:#80DDEA
+    style N7 fill:#FCE4EC,stroke:#E91E63
+    style N8 fill:#E8F0FF,stroke:#A2D0FF
+    style N9 fill:#FCE4EC,stroke:#E91E63
+    style N10 fill:#E8F0FF,stroke:#A2D0FF
+    style N11 fill:#E8F0FF,stroke:#A2D0FF
+    style N12 fill:#FCE4EC,stroke:#E91E63
+    style N13 fill:#FCE4EC,stroke:#E91E63
+    style N14 fill:#FCE4EC,stroke:#E91E63
+    style S0 fill:#E8F0FF,stroke:#A2D0FF
+    style S1 fill:#D3F7F9,stroke:#80DDEA
+    style S2 fill:#D3F7F9,stroke:#80DDEA
+    style M1 fill:#D3F7F9,stroke:#80DDEA
+    style nest0_0 fill:#FCE4EC,stroke:#E91E63
+    style nest0_1 fill:#FCE4EC,stroke:#E91E63
+    style nest0_2 fill:#FCE4EC,stroke:#E91E63
+    style nest0_3 fill:#FCE4EC,stroke:#E91E63
+    style nest1_0 fill:#D3F7F9,stroke:#80DDEA
+    style nest1_1 fill:#E8F0FF,stroke:#A2D0FF
+    style nest1_2 fill:#E8F0FF,stroke:#A2D0FF
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#E91E63,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A2D0FF,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#80DDEA,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#A2D0FF,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_89.txt b/test/mermaid/hard/mermaid_89.txt
new file mode 100644
index 0000000000000000000000000000000000000000..187fab5931f84481408f292141b19b0d689431d4
--- /dev/null
+++ b/test/mermaid/hard/mermaid_89.txt
@@ -0,0 +1,40 @@
+<Allergen Management, harvests, Service Delivery>
+<Baking, connectedTo, Catering Operations>
+<Baking, connectedTo, Recipe Development>
+<Branding and Marketing, connectedTo, Distribution>
+<Branding and Marketing, connectedTo, Menu Planning>
+<Branding and Marketing, connectedTo, Service Delivery>
+<Branding and Marketing, ingredients, Product Shelf_Life Testing>
+<Brewing, connectedTo, Allergen Management>
+<Brewing, connectedTo, Restaurant Reservation System>
+<Brewing, connectedTo, Waste Reduction>
+<Catering Operations, connectedTo, Brewing>
+<Catering Operations, connectedTo, Cooking>
+<Cooking, partOf, Food Preparation>
+<Cooking, sanitizes, Delivery Service Coordination>
+<Delivery Service Coordination, connectedTo, Food Preservation>
+<Delivery Service Coordination, partOf, Food Preparation>
+<Dietary Requirement Accommodation, partOf, Customer Order Taking>
+<Dietary Requirement Accommodation, transports, Food Packaging Design>
+<Distribution, connectedTo, Sensory Evaluation>
+<Food Packaging Design, connectedTo, New Product Launch>
+<Food Packaging Design, connectedTo, Product Shelf_Life Testing>
+<Food Preservation, connectedTo, Packaging>
+<Food Preservation, partOf, Food Preparation>
+<Menu Planning, connectedTo, Allergen Management>
+<Menu Planning, connectedTo, Baking>
+<Menu Planning, connectedTo, Recipe Development>
+<New Product Launch, connectedTo, Quality Control>
+<New Product Launch, partOf, Customer Order Taking>
+<Packaging, partOf, Food Preparation>
+<Packaging, promotes, Catering Operations>
+<Product Shelf_Life Testing, complies, Recipe Development>
+<Quality Control, connectedTo, Dietary Requirement Accommodation>
+<Quality Control, partOf, Customer Order Taking>
+<Recipe Development, connectedTo, Distribution>
+<Restaurant Reservation System, connectedTo, Allergen Management>
+<Restaurant Reservation System, connectedTo, Recipe Development>
+<Sensory Evaluation, connectedTo, Food Processing Automation>
+<Service Delivery, connectedTo, Food Packaging Design>
+<Waste Reduction, connectedTo, Restaurant Reservation System>
+<Waste Reduction, regulates, Recipe Development>
diff --git a/test/mermaid/hard/mermaid_9.mmd b/test/mermaid/hard/mermaid_9.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..e4c5ee6b7050e51b532378b79f3eabf3b9be5097
--- /dev/null
+++ b/test/mermaid/hard/mermaid_9.mmd
@@ -0,0 +1,140 @@
+graph RL
+    N0([start])
+    N1([Quality Control])
+    N2([Recycling Process])
+    N3[/Inspection/]
+    N4(Component Sourcing)
+    N5[Inventory Check]
+    N6([Procurement])
+    N7[Production Scheduling]
+    N8([Assembly])
+    N9[/Robotics Integration/]
+    N10[Batch Tracking]
+    N11(Painting)
+    N12[Shipping]
+    N13([Supply Chain Synchronization])
+    N14[Automated Guided Vehicle Operation]
+    N15(Bills of Material Generation)
+    N16[(Raw Material)]
+    N17{Yield Optimization}
+    N18(Factory Layout Planning)
+    N19([Ergonomics Assessment])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Workflow Optimization
+        nest0_0[/Serialization/]
+        nest0_1[/Automated Assembly/]
+    end
+    subgraph Logistics Planning
+        nest1_0[/Machine Calibration/]
+        nest1_1([Design Review])
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 -.-> N10
+    N10 --> N11
+    N11 --> N12
+    N12 -.-> N13
+    N13 -.-> |receives| N14
+    N14 -.-> N15
+    N15 --> N16
+    N16 --> |assembles| N17
+    N17 --> N18
+    N18 --> |stores| N19
+    nest0_0 -.-> nest0_1
+    N1 -.-> nest0_0
+    nest0_1 --> N5
+    nest1_0 --> nest1_1
+    N9 -.-> nest1_0
+    nest1_1 --> N12
+    N8 --> S0
+    S0 --> N17
+    S0 -.-> N10
+    S0 --> N12
+    N9 -.-> S1
+    S1 -.-> N11
+    S1 --> N12
+    S1 -.-> N13
+    N0 -.-> M0
+    N2 -.-> M0
+    M0 -.-> N4
+    N1 --> M1
+    N0 --> M1
+    M1 -.-> N10
+    style N0 fill:#C8E6C9,stroke:#388E3C
+    style N1 fill:#C8E6C9,stroke:#388E3C
+    style N2 fill:#D3D7EB,stroke:#8C9EFF
+    style N3 fill:#D3D7EB,stroke:#8C9EFF
+    style N4 fill:#FCFCE7,stroke:#DCE775
+    style N5 fill:#D3D7EB,stroke:#8C9EFF
+    style N6 fill:#D3D7EB,stroke:#8C9EFF
+    style N7 fill:#FCFCE7,stroke:#DCE775
+    style N8 fill:#FCFCE7,stroke:#DCE775
+    style N9 fill:#FCFCE7,stroke:#DCE775
+    style N10 fill:#D3D7EB,stroke:#8C9EFF
+    style N11 fill:#C8E6C9,stroke:#388E3C
+    style N12 fill:#FCFCE7,stroke:#DCE775
+    style N13 fill:#D3D7EB,stroke:#8C9EFF
+    style N14 fill:#FCFCE7,stroke:#DCE775
+    style N15 fill:#C8E6C9,stroke:#388E3C
+    style N16 fill:#D3D7EB,stroke:#8C9EFF
+    style N17 fill:#FCFCE7,stroke:#DCE775
+    style N18 fill:#D3D7EB,stroke:#8C9EFF
+    style N19 fill:#C8E6C9,stroke:#388E3C
+    style S0 fill:#FCFCE7,stroke:#DCE775
+    style S1 fill:#FCFCE7,stroke:#DCE775
+    style M0 fill:#C8E6C9,stroke:#388E3C
+    style M1 fill:#D3D7EB,stroke:#8C9EFF
+    style nest0_0 fill:#D3D7EB,stroke:#8C9EFF
+    style nest0_1 fill:#FCFCE7,stroke:#DCE775
+    style nest1_0 fill:#C8E6C9,stroke:#388E3C
+    style nest1_1 fill:#D3D7EB,stroke:#8C9EFF
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#8C9EFF,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#388E3C,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#DCE775,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#8C9EFF,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_9.txt b/test/mermaid/hard/mermaid_9.txt
new file mode 100644
index 0000000000000000000000000000000000000000..7c515b32184cef3e5de51bc1159dfff285a6d634
--- /dev/null
+++ b/test/mermaid/hard/mermaid_9.txt
@@ -0,0 +1,39 @@
+<Assembly, connectedTo, Batch Tracking>
+<Assembly, connectedTo, Robotics Integration>
+<Assembly, connectedTo, Shipping>
+<Assembly, connectedTo, Yield Optimization>
+<Automated Assembly, connectedTo, Inventory Check>
+<Automated Assembly, partOf, Workflow Optimization>
+<Automated Guided Vehicle Operation, connectedTo, Bills of Material Generation>
+<Batch Tracking, connectedTo, Painting>
+<Bills of Material Generation, connectedTo, Raw Material>
+<Component Sourcing, connectedTo, Inventory Check>
+<Design Review, connectedTo, Shipping>
+<Design Review, partOf, Logistics Planning>
+<Factory Layout Planning, stores, Ergonomics Assessment>
+<Inspection, connectedTo, Component Sourcing>
+<Inventory Check, connectedTo, Procurement>
+<Machine Calibration, connectedTo, Design Review>
+<Machine Calibration, partOf, Logistics Planning>
+<Painting, connectedTo, Shipping>
+<Procurement, connectedTo, Production Scheduling>
+<Production Scheduling, connectedTo, Assembly>
+<Quality Control, connectedTo, Batch Tracking>
+<Quality Control, connectedTo, Recycling Process>
+<Quality Control, connectedTo, Serialization>
+<Raw Material, assembles, Yield Optimization>
+<Recycling Process, connectedTo, Component Sourcing>
+<Recycling Process, connectedTo, Inspection>
+<Robotics Integration, connectedTo, Batch Tracking>
+<Robotics Integration, connectedTo, Machine Calibration>
+<Robotics Integration, connectedTo, Painting>
+<Robotics Integration, connectedTo, Shipping>
+<Robotics Integration, connectedTo, Supply Chain Synchronization>
+<Serialization, connectedTo, Automated Assembly>
+<Serialization, partOf, Workflow Optimization>
+<Shipping, connectedTo, Supply Chain Synchronization>
+<Supply Chain Synchronization, receives, Automated Guided Vehicle Operation>
+<Yield Optimization, connectedTo, Factory Layout Planning>
+<start, connectedTo, Batch Tracking>
+<start, connectedTo, Component Sourcing>
+<start, connectedTo, Quality Control>
diff --git a/test/mermaid/hard/mermaid_91.mmd b/test/mermaid/hard/mermaid_91.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..bdd8602bfcf4213414dffb1a3a4b2e20fc13c088
--- /dev/null
+++ b/test/mermaid/hard/mermaid_91.mmd
@@ -0,0 +1,119 @@
+graph BT
+    N0([start])
+    N1[[Rule Enforcement]]
+    N2{Event Broadcasting}
+    N3[Athlete Performance Tracking]
+    N4[/Refereeing/]
+    N5[/Fan Engagement/]
+    N6[(Merchandise Sales)]
+    N7([Sponsorship Management])
+    N8(Fan Club Management)
+    N9[Coaching]
+    N10(Media Rights Negotiation)
+    N11[(Stadium Operations)]
+    N12[Training Session]
+    N13[(Youth Development Programs)]
+    N14[[League Management]]
+    N15(Athlete Brand Management)
+    N16([end])
+    S0(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Sports Marketing
+        nest0_0([Sports Betting Regulation])
+        nest0_1[/Player Transfer/]
+        nest0_2(Game Strategy)
+    end
+    subgraph Match Play
+        nest1_0[(Fitness Conditioning)]
+        nest1_1[/Talent Scouting/]
+        nest1_2(Accessibility in Sports Venues)
+    end
+    N0 --> N1
+    N1 -.-> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 --> N5
+    N5 -.-> N6
+    N6 -.-> N7
+    N7 --> |yes| N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 -.-> N12
+    N12 --> N13
+    N13 -.-> N14
+    N14 --> N15
+    N15 -.-> N16
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    N2 -.-> nest0_0
+    nest0_2 --> N14
+    nest1_0 --> |no| nest1_1
+    nest1_1 -.-> nest1_2
+    N10 -.-> nest1_0
+    nest1_2 -.-> N4
+    N8 --> S0
+    S0 --> N13
+    S0 -.-> N11
+    S0 -.-> N15
+    N2 --> M0
+    N6 -.-> M0
+    N3 --> M0
+    N1 -.-> M0
+    M0 -.-> N10
+    N1 --> M1
+    N3 -.-> M1
+    N2 --> M1
+    M1 -.-> N5
+    N2 -.-> M2
+    N0 -.-> M2
+    N4 -.-> M2
+    M2 -.-> N9
+    style S0 fill:#DACBE3,stroke:#A188D0
+    style M0 fill:#FFE88D,stroke:#FFDA4E
+    style M1 fill:#FFE88D,stroke:#FFDA4E
+    style M2 fill:#FFE88D,stroke:#FFDA4E
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#FFDA4E,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#A188D0,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#AB47BC,stroke-width:2px,fill:none;
+    linkStyle 40 stroke:#FFDA4E,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_91.txt b/test/mermaid/hard/mermaid_91.txt
new file mode 100644
index 0000000000000000000000000000000000000000..1dc996dc671f342ebc8845ce7de9448069741bd0
--- /dev/null
+++ b/test/mermaid/hard/mermaid_91.txt
@@ -0,0 +1,43 @@
+<Accessibility in Sports Venues, connectedTo, Refereeing>
+<Accessibility in Sports Venues, partOf, Match Play>
+<Athlete Brand Management, connectedTo, end>
+<Athlete Performance Tracking, connectedTo, Fan Engagement>
+<Athlete Performance Tracking, connectedTo, Media Rights Negotiation>
+<Athlete Performance Tracking, connectedTo, Refereeing>
+<Coaching, connectedTo, Media Rights Negotiation>
+<Event Broadcasting, connectedTo, Athlete Performance Tracking>
+<Event Broadcasting, connectedTo, Coaching>
+<Event Broadcasting, connectedTo, Fan Engagement>
+<Event Broadcasting, connectedTo, Media Rights Negotiation>
+<Event Broadcasting, connectedTo, Sports Betting Regulation>
+<Fan Club Management, connectedTo, Athlete Brand Management>
+<Fan Club Management, connectedTo, Coaching>
+<Fan Club Management, connectedTo, Stadium Operations>
+<Fan Club Management, connectedTo, Youth Development Programs>
+<Fan Engagement, connectedTo, Merchandise Sales>
+<Fitness Conditioning, no, Talent Scouting>
+<Fitness Conditioning, partOf, Match Play>
+<Game Strategy, connectedTo, League Management>
+<Game Strategy, partOf, Sports Marketing>
+<League Management, connectedTo, Athlete Brand Management>
+<Media Rights Negotiation, connectedTo, Fitness Conditioning>
+<Media Rights Negotiation, connectedTo, Stadium Operations>
+<Merchandise Sales, connectedTo, Media Rights Negotiation>
+<Merchandise Sales, connectedTo, Sponsorship Management>
+<Player Transfer, connectedTo, Game Strategy>
+<Player Transfer, partOf, Sports Marketing>
+<Refereeing, connectedTo, Coaching>
+<Refereeing, connectedTo, Fan Engagement>
+<Rule Enforcement, connectedTo, Event Broadcasting>
+<Rule Enforcement, connectedTo, Fan Engagement>
+<Rule Enforcement, connectedTo, Media Rights Negotiation>
+<Sponsorship Management, yes, Fan Club Management>
+<Sports Betting Regulation, connectedTo, Player Transfer>
+<Sports Betting Regulation, partOf, Sports Marketing>
+<Stadium Operations, connectedTo, Training Session>
+<Talent Scouting, connectedTo, Accessibility in Sports Venues>
+<Talent Scouting, partOf, Match Play>
+<Training Session, connectedTo, Youth Development Programs>
+<Youth Development Programs, connectedTo, League Management>
+<start, connectedTo, Coaching>
+<start, connectedTo, Rule Enforcement>
diff --git a/test/mermaid/hard/mermaid_92.mmd b/test/mermaid/hard/mermaid_92.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..1dfb53890e8597852c727fc9b4e38916a57db4ee
--- /dev/null
+++ b/test/mermaid/hard/mermaid_92.mmd
@@ -0,0 +1,107 @@
+graph TD
+    N0([start])
+    N1[/Sports Psychology/]
+    N2[(Sports Betting Regulation)]
+    N3(Stadium Operations)
+    N4{Accessibility in Sports Venues}
+    N5(Merchandise Sales)
+    N6(Player Recruitment)
+    N7([Injury Management])
+    N8(Talent Scouting)
+    N9(Fan Engagement)
+    N10{Athlete Brand Management}
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Athlete Performance Tracking
+        nest0_0[[Sports Medicine]]
+        nest0_1[(Sports Analytics)]
+        nest0_2[Youth Development Programs]
+        nest0_3[Sponsorship Management]
+    end
+    subgraph Rule Enforcement
+        nest1_0[/Media Rights Negotiation/]
+        nest1_1(Sports Marketing)
+    end
+    N0 -.-> N1
+    N1 --> |yes| N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 --> |no| N8
+    N8 --> N9
+    N9 --> N10
+    nest0_0 -.-> nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N6 -.-> nest0_0
+    nest0_3 --> N9
+    nest1_0 -.-> nest1_1
+    N1 -.-> nest1_0
+    nest1_1 -.-> N8
+    N6 --> S0
+    S0 --> |yes| N9
+    S0 -.-> N10
+    S0 -.-> |yes| N8
+    N1 --> S1
+    S1 -.-> N4
+    S1 --> N8
+    S1 -.-> N7
+    S1 --> N6
+    N1 --> S2
+    S2 --> |no| N10
+    S2 --> N5
+    N1 --> M0
+    N4 --> M0
+    N0 -.-> |yes| M0
+    M0 --> N7
+    N0 -.-> M1
+    N2 --> M1
+    M1 --> N4
+    style S0 fill:#B2EBF2,stroke:#00BCD4
+    style S1 fill:#F2E6F5,stroke:#CB9BE1
+    style S2 fill:#F2E6F5,stroke:#CB9BE1
+    style M0 fill:#FFFDE0,stroke:#FFF8A6
+    style M1 fill:#B2EBF2,stroke:#00BCD4
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#FFF8A6,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#CB9BE1,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#CB9BE1,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_93.mmd b/test/mermaid/hard/mermaid_93.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..3426d1fb24d0b134f14317bcac10980b0265474b
--- /dev/null
+++ b/test/mermaid/hard/mermaid_93.mmd
@@ -0,0 +1,106 @@
+graph BT
+    N0([Athlete Performance Tracking])
+    N1(Data Analytics in Sports)
+    N2[Fan Engagement]
+    N3[(Scorekeeping)]
+    N4[/Coaching/]
+    N5[Fan Experience Enhancement]
+    N6(Injury Management)
+    N7[/Game Strategy/]
+    N8[(Youth Development Programs)]
+    N9[Sponsorship Management]
+    N10[[Athlete Brand Management]]
+    N11{Tournament Organization}
+    N12([Fitness Conditioning])
+    S0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Refereeing
+        nest0_0[(Sports Betting Regulation)]
+        nest0_1{Ticketing Sales}
+    end
+    subgraph Sports Medicine
+        nest1_0(Athlete Nutrition Planning)
+        nest1_1[/Match Play/]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    N11 -.-> N12
+    nest0_0 -.-> nest0_1
+    N8 --> nest0_0
+    nest0_1 --> N6
+    nest1_0 --> nest1_1
+    N7 -.-> nest1_0
+    nest1_1 -.-> N1
+    N0 --> S0
+    S0 -.-> N4
+    S0 -.-> N7
+    S0 --> N11
+    N1 -.-> M1
+    N2 -.-> M1
+    N0 -.-> M1
+    M1 -.-> N4
+    N1 -.-> M2
+    N0 --> M2
+    N2 --> M2
+    M2 -.-> N4
+    style N0 fill:#F1F8FF,stroke:#42A5F5
+    style N1 fill:#F1F8FF,stroke:#42A5F5
+    style N2 fill:#F1F8FF,stroke:#42A5F5
+    style N3 fill:#EBEBEB,stroke:#E0E0E0
+    style N4 fill:#EBEBEB,stroke:#E0E0E0
+    style N5 fill:#EBEBEB,stroke:#E0E0E0
+    style N6 fill:#F0F4C3,stroke:#AED581
+    style N7 fill:#EBEBEB,stroke:#E0E0E0
+    style N8 fill:#F1F8FF,stroke:#42A5F5
+    style N9 fill:#EBEBEB,stroke:#E0E0E0
+    style N10 fill:#EBEBEB,stroke:#E0E0E0
+    style N11 fill:#F1F8FF,stroke:#42A5F5
+    style N12 fill:#EBEBEB,stroke:#E0E0E0
+    style S0 fill:#F1F8FF,stroke:#42A5F5
+    style M1 fill:#F0F4C3,stroke:#AED581
+    style M2 fill:#F0F4C3,stroke:#AED581
+    style nest0_0 fill:#F0F4C3,stroke:#AED581
+    style nest0_1 fill:#F0F4C3,stroke:#AED581
+    style nest1_0 fill:#F0F4C3,stroke:#AED581
+    style nest1_1 fill:#EBEBEB,stroke:#E0E0E0
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#AED581,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#42A5F5,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_93.txt b/test/mermaid/hard/mermaid_93.txt
new file mode 100644
index 0000000000000000000000000000000000000000..e00dbfd00b89e91faf7c439a0fa6b2cbbc297846
--- /dev/null
+++ b/test/mermaid/hard/mermaid_93.txt
@@ -0,0 +1,27 @@
+<Athlete Brand Management, connectedTo, Tournament Organization>
+<Athlete Nutrition Planning, connectedTo, Match Play>
+<Athlete Nutrition Planning, partOf, Sports Medicine>
+<Athlete Performance Tracking, connectedTo, Coaching>
+<Athlete Performance Tracking, connectedTo, Data Analytics in Sports>
+<Athlete Performance Tracking, connectedTo, Game Strategy>
+<Athlete Performance Tracking, connectedTo, Tournament Organization>
+<Coaching, connectedTo, Fan Experience Enhancement>
+<Data Analytics in Sports, connectedTo, Coaching>
+<Data Analytics in Sports, connectedTo, Fan Engagement>
+<Fan Engagement, connectedTo, Coaching>
+<Fan Engagement, connectedTo, Scorekeeping>
+<Fan Experience Enhancement, connectedTo, Injury Management>
+<Game Strategy, connectedTo, Athlete Nutrition Planning>
+<Game Strategy, connectedTo, Youth Development Programs>
+<Injury Management, connectedTo, Game Strategy>
+<Match Play, connectedTo, Data Analytics in Sports>
+<Match Play, partOf, Sports Medicine>
+<Scorekeeping, connectedTo, Coaching>
+<Sponsorship Management, connectedTo, Athlete Brand Management>
+<Sports Betting Regulation, connectedTo, Ticketing Sales>
+<Sports Betting Regulation, partOf, Refereeing>
+<Ticketing Sales, connectedTo, Injury Management>
+<Ticketing Sales, partOf, Refereeing>
+<Tournament Organization, connectedTo, Fitness Conditioning>
+<Youth Development Programs, connectedTo, Sponsorship Management>
+<Youth Development Programs, connectedTo, Sports Betting Regulation>
diff --git a/test/mermaid/hard/mermaid_94.mmd b/test/mermaid/hard/mermaid_94.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..7e1617f0ba0d677c71fe15e9825564b756023260
--- /dev/null
+++ b/test/mermaid/hard/mermaid_94.mmd
@@ -0,0 +1,136 @@
+graph TD
+    N0([Footwear Production])
+    N1[Wholesale Distribution]
+    N2(Textile Manufacturing)
+    N3([Product Photography])
+    N4[Custom Apparel Design]
+    N5[[Inventory Management]]
+    N6(Color Palette Selection)
+    N7[[Influencer Collaboration]]
+    N8(Accessory Design)
+    N9[[Supply Chain Transparency]]
+    N10([Fashion Show Production])
+    N11[(Distribution)]
+    N12([Styling])
+    N13[/Design Sketching/]
+    N14([Material Sourcing])
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Sample Creation
+        nest0_0[Garment Production]
+        nest0_1([Garment Fitting Session])
+        nest0_2[(Sustainable Fashion Practices)]
+        nest0_3[[Fabric Innovation]]
+    end
+    subgraph Return Processing
+        nest1_0[Marketing Campaign]
+        nest1_1(E_commerce Management)
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 --> N7
+    N7 --> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 -.-> N11
+    N11 --> N12
+    N12 --> N13
+    N13 --> N14
+    nest0_0 -.-> |recycles| nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 --> nest0_3
+    N13 -.-> nest0_0
+    nest0_3 -.-> N3
+    nest1_0 --> nest1_1
+    N11 --> nest1_0
+    nest1_1 --> |brands| N12
+    N9 -.-> S0
+    S0 --> N13
+    S0 --> N11
+    S0 --> N14
+    S0 -.-> N12
+    N0 --> S1
+    S1 --> N4
+    S1 --> |distributes| N11
+    S1 -.-> N10
+    S1 --> |trends| N2
+    N1 --> |forecasts| M0
+    N10 -.-> M0
+    M0 -.-> N12
+    N0 --> M2
+    N3 -.-> M2
+    N1 --> M2
+    N2 --> M2
+    M2 -.-> N5
+    style N0 fill:#FFFDE7,stroke:#FBC02D
+    style N1 fill:#FFFDE7,stroke:#FBC02D
+    style N2 fill:#D1C4E9,stroke:#673AB7
+    style N3 fill:#B3E5FC,stroke:#03A9F4
+    style N4 fill:#FFFDE7,stroke:#FBC02D
+    style N5 fill:#B3E5FC,stroke:#03A9F4
+    style N6 fill:#D1C4E9,stroke:#673AB7
+    style N7 fill:#B3E5FC,stroke:#03A9F4
+    style N8 fill:#FFFDE7,stroke:#FBC02D
+    style N9 fill:#B3E5FC,stroke:#03A9F4
+    style N10 fill:#FFFDE7,stroke:#FBC02D
+    style N11 fill:#D1C4E9,stroke:#673AB7
+    style N12 fill:#FFFDE7,stroke:#FBC02D
+    style N13 fill:#D1C4E9,stroke:#673AB7
+    style N14 fill:#B3E5FC,stroke:#03A9F4
+    style S0 fill:#D1C4E9,stroke:#673AB7
+    style S1 fill:#B3E5FC,stroke:#03A9F4
+    style M0 fill:#D1C4E9,stroke:#673AB7
+    style M2 fill:#B3E5FC,stroke:#03A9F4
+    style nest0_0 fill:#D1C4E9,stroke:#673AB7
+    style nest0_1 fill:#B3E5FC,stroke:#03A9F4
+    style nest0_2 fill:#D1C4E9,stroke:#673AB7
+    style nest0_3 fill:#D1C4E9,stroke:#673AB7
+    style nest1_0 fill:#B3E5FC,stroke:#03A9F4
+    style nest1_1 fill:#B3E5FC,stroke:#03A9F4
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#FBC02D,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#03A9F4,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#673AB7,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#03A9F4,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_94.txt b/test/mermaid/hard/mermaid_94.txt
new file mode 100644
index 0000000000000000000000000000000000000000..58236d8341b65d15b06d7e5545b7cd5a3d93b0a2
--- /dev/null
+++ b/test/mermaid/hard/mermaid_94.txt
@@ -0,0 +1,42 @@
+<Accessory Design, connectedTo, Supply Chain Transparency>
+<Color Palette Selection, connectedTo, Influencer Collaboration>
+<Custom Apparel Design, connectedTo, Inventory Management>
+<Design Sketching, connectedTo, Garment Production>
+<Design Sketching, connectedTo, Material Sourcing>
+<Distribution, connectedTo, Marketing Campaign>
+<Distribution, connectedTo, Styling>
+<E_commerce Management, brands, Styling>
+<E_commerce Management, partOf, Return Processing>
+<Fabric Innovation, connectedTo, Product Photography>
+<Fabric Innovation, partOf, Sample Creation>
+<Fashion Show Production, connectedTo, Distribution>
+<Fashion Show Production, connectedTo, Styling>
+<Footwear Production, connectedTo, Custom Apparel Design>
+<Footwear Production, connectedTo, Fashion Show Production>
+<Footwear Production, connectedTo, Inventory Management>
+<Footwear Production, connectedTo, Wholesale Distribution>
+<Footwear Production, distributes, Distribution>
+<Footwear Production, trends, Textile Manufacturing>
+<Garment Fitting Session, connectedTo, Sustainable Fashion Practices>
+<Garment Fitting Session, partOf, Sample Creation>
+<Garment Production, partOf, Sample Creation>
+<Garment Production, recycles, Garment Fitting Session>
+<Influencer Collaboration, connectedTo, Accessory Design>
+<Inventory Management, connectedTo, Color Palette Selection>
+<Marketing Campaign, connectedTo, E_commerce Management>
+<Marketing Campaign, partOf, Return Processing>
+<Product Photography, connectedTo, Custom Apparel Design>
+<Product Photography, connectedTo, Inventory Management>
+<Styling, connectedTo, Design Sketching>
+<Supply Chain Transparency, connectedTo, Design Sketching>
+<Supply Chain Transparency, connectedTo, Distribution>
+<Supply Chain Transparency, connectedTo, Fashion Show Production>
+<Supply Chain Transparency, connectedTo, Material Sourcing>
+<Supply Chain Transparency, connectedTo, Styling>
+<Sustainable Fashion Practices, connectedTo, Fabric Innovation>
+<Sustainable Fashion Practices, partOf, Sample Creation>
+<Textile Manufacturing, connectedTo, Inventory Management>
+<Textile Manufacturing, connectedTo, Product Photography>
+<Wholesale Distribution, connectedTo, Inventory Management>
+<Wholesale Distribution, connectedTo, Textile Manufacturing>
+<Wholesale Distribution, forecasts, Styling>
diff --git a/test/mermaid/hard/mermaid_95.mmd b/test/mermaid/hard/mermaid_95.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..9f60e9f7ea2c3bbe9222806d7105768ac84a2a0c
--- /dev/null
+++ b/test/mermaid/hard/mermaid_95.mmd
@@ -0,0 +1,82 @@
+graph RL
+    N0([start])
+    N1[(Return Processing)]
+    N2[[Brand Licensing]]
+    N3[Packaging]
+    N4(Ready_to_Wear Collection Launch)
+    N5[Haute Couture Creation]
+    N6[Trend Research]
+    N7[(Product Photography)]
+    N8[(Seasonal Collection Planning)]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    subgraph Custom Apparel Design
+        nest0_0([Wholesale Distribution])
+        nest0_1([Distribution])
+        nest0_2[Fabric Innovation]
+        nest0_3[(Inventory Management)]
+    end
+    subgraph Styling
+        nest1_0([Material Sourcing])
+        nest1_1[(Garment Fitting Session)]
+        nest1_2[/Retail Store Merchandising/]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 -.-> N3
+    N3 -.-> N4
+    N4 -.-> |yes| N5
+    N5 --> N6
+    N6 -.-> N7
+    N7 --> N8
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 -.-> nest0_3
+    N5 --> nest0_0
+    nest0_3 -.-> N7
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N3 --> nest1_0
+    nest1_2 -.-> |yes| N8
+    N1 -.-> S0
+    S0 --> |yes| N3
+    S0 -.-> N4
+    S0 -.-> N5
+    N5 --> S1
+    S1 --> N8
+    S1 --> N7
+    N0 --> M0
+    N1 --> |no| M0
+    M0 -.-> N3
+    style S0 fill:#E8EAF6,stroke:#7986CB
+    style S1 fill:#D0E0F8,stroke:#4285F4
+    style M0 fill:#FFF8E1,stroke:#FFD54F
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#FFD54F,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#4285F4,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#FFD54F,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_95.txt b/test/mermaid/hard/mermaid_95.txt
new file mode 100644
index 0000000000000000000000000000000000000000..51301766d358da17a0e681f8b12dfe8ebdc51127
--- /dev/null
+++ b/test/mermaid/hard/mermaid_95.txt
@@ -0,0 +1,31 @@
+<Brand Licensing, connectedTo, Packaging>
+<Distribution, connectedTo, Fabric Innovation>
+<Distribution, partOf, Custom Apparel Design>
+<Fabric Innovation, connectedTo, Inventory Management>
+<Fabric Innovation, partOf, Custom Apparel Design>
+<Garment Fitting Session, connectedTo, Retail Store Merchandising>
+<Garment Fitting Session, partOf, Styling>
+<Haute Couture Creation, connectedTo, Product Photography>
+<Haute Couture Creation, connectedTo, Seasonal Collection Planning>
+<Haute Couture Creation, connectedTo, Trend Research>
+<Haute Couture Creation, connectedTo, Wholesale Distribution>
+<Inventory Management, connectedTo, Product Photography>
+<Inventory Management, partOf, Custom Apparel Design>
+<Material Sourcing, connectedTo, Garment Fitting Session>
+<Material Sourcing, partOf, Styling>
+<Packaging, connectedTo, Material Sourcing>
+<Packaging, connectedTo, Ready_to_Wear Collection Launch>
+<Product Photography, connectedTo, Seasonal Collection Planning>
+<Ready_to_Wear Collection Launch, yes, Haute Couture Creation>
+<Retail Store Merchandising, partOf, Styling>
+<Retail Store Merchandising, yes, Seasonal Collection Planning>
+<Return Processing, connectedTo, Brand Licensing>
+<Return Processing, connectedTo, Haute Couture Creation>
+<Return Processing, connectedTo, Ready_to_Wear Collection Launch>
+<Return Processing, no, Packaging>
+<Return Processing, yes, Packaging>
+<Trend Research, connectedTo, Product Photography>
+<Wholesale Distribution, connectedTo, Distribution>
+<Wholesale Distribution, partOf, Custom Apparel Design>
+<start, connectedTo, Packaging>
+<start, connectedTo, Return Processing>
diff --git a/test/mermaid/hard/mermaid_96.mmd b/test/mermaid/hard/mermaid_96.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..7b085878b6dda6c9b22d0daf0be3330cb8e43019
--- /dev/null
+++ b/test/mermaid/hard/mermaid_96.mmd
@@ -0,0 +1,134 @@
+graph LR
+    N0([start])
+    N1([Embroidery and Embellishment])
+    N2(Global Sourcing Strategy)
+    N3[[Packaging]]
+    N4(Material Sourcing)
+    N5(Customer Loyalty Programs)
+    N6[[Product Photography]]
+    N7[[Quality Check]]
+    N8[Ready_to_Wear Collection Launch]
+    N9(Customer Feedback Analysis)
+    N10[Accessory Design]
+    N11{Styling}
+    N12(Trend Research)
+    N13{Inventory Management}
+    N14([end])
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    subgraph Brand Licensing
+        nest0_0[Marketing Campaign]
+        nest0_1(Distribution)
+        nest0_2{Brand Building}
+    end
+    subgraph E_commerce Management
+        nest1_0[/Fabric Innovation/]
+        nest1_1{Design Sketching}
+        nest1_2[PR and Media Outreach]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    N7 -.-> N8
+    N8 -.-> N9
+    N9 --> N10
+    N10 --> N11
+    N11 --> N12
+    N12 -.-> |sketches| N13
+    N13 -.-> N14
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N3 -.-> nest0_0
+    nest0_2 --> N8
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N3 -.-> nest1_0
+    nest1_2 --> N4
+    N2 --> S0
+    S0 -.-> N5
+    S0 --> N14
+    S0 --> N10
+    N4 -.-> S1
+    S1 -.-> N12
+    S1 --> |inspects| N7
+    N11 -.-> S2
+    S2 --> N14
+    S2 --> N13
+    N2 -.-> M0
+    N1 -.-> M0
+    M0 --> N6
+    N5 --> M1
+    N4 --> |designs| M1
+    M1 --> N7
+    style N0 fill:#EDE7F6,stroke:#9575CD
+    style N1 fill:#D0EFEE,stroke:#73C6BC
+    style N2 fill:#ECCFF5,stroke:#CD8FF2
+    style N3 fill:#ECCFF5,stroke:#CD8FF2
+    style N4 fill:#D0EFEE,stroke:#73C6BC
+    style N5 fill:#ECCFF5,stroke:#CD8FF2
+    style N6 fill:#D0EFEE,stroke:#73C6BC
+    style N7 fill:#D0EFEE,stroke:#73C6BC
+    style N8 fill:#ECCFF5,stroke:#CD8FF2
+    style N9 fill:#ECCFF5,stroke:#CD8FF2
+    style N10 fill:#ECCFF5,stroke:#CD8FF2
+    style N11 fill:#D0EFEE,stroke:#73C6BC
+    style N12 fill:#ECCFF5,stroke:#CD8FF2
+    style N13 fill:#ECCFF5,stroke:#CD8FF2
+    style N14 fill:#ECCFF5,stroke:#CD8FF2
+    style S0 fill:#EDE7F6,stroke:#9575CD
+    style S1 fill:#ECCFF5,stroke:#CD8FF2
+    style S2 fill:#ECCFF5,stroke:#CD8FF2
+    style M0 fill:#ECCFF5,stroke:#CD8FF2
+    style M1 fill:#EDE7F6,stroke:#9575CD
+    style nest0_0 fill:#D0EFEE,stroke:#73C6BC
+    style nest0_1 fill:#EDE7F6,stroke:#9575CD
+    style nest0_2 fill:#D0EFEE,stroke:#73C6BC
+    style nest1_0 fill:#EDE7F6,stroke:#9575CD
+    style nest1_1 fill:#EDE7F6,stroke:#9575CD
+    style nest1_2 fill:#D0EFEE,stroke:#73C6BC
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#CD8FF2,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#9575CD,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#73C6BC,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#000000,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_96.txt b/test/mermaid/hard/mermaid_96.txt
new file mode 100644
index 0000000000000000000000000000000000000000..f320f92207f4e9862f72e75819fa4ac2e5beedc6
--- /dev/null
+++ b/test/mermaid/hard/mermaid_96.txt
@@ -0,0 +1,39 @@
+<Accessory Design, connectedTo, Styling>
+<Brand Building, connectedTo, Ready_to_Wear Collection Launch>
+<Brand Building, partOf, Brand Licensing>
+<Customer Feedback Analysis, connectedTo, Accessory Design>
+<Customer Loyalty Programs, connectedTo, Product Photography>
+<Customer Loyalty Programs, connectedTo, Quality Check>
+<Design Sketching, connectedTo, PR and Media Outreach>
+<Design Sketching, partOf, E_commerce Management>
+<Distribution, connectedTo, Brand Building>
+<Distribution, partOf, Brand Licensing>
+<Embroidery and Embellishment, connectedTo, Global Sourcing Strategy>
+<Embroidery and Embellishment, connectedTo, Product Photography>
+<Fabric Innovation, connectedTo, Design Sketching>
+<Fabric Innovation, partOf, E_commerce Management>
+<Global Sourcing Strategy, connectedTo, Accessory Design>
+<Global Sourcing Strategy, connectedTo, Customer Loyalty Programs>
+<Global Sourcing Strategy, connectedTo, Packaging>
+<Global Sourcing Strategy, connectedTo, Product Photography>
+<Global Sourcing Strategy, connectedTo, end>
+<Inventory Management, connectedTo, end>
+<Marketing Campaign, connectedTo, Distribution>
+<Marketing Campaign, partOf, Brand Licensing>
+<Material Sourcing, connectedTo, Customer Loyalty Programs>
+<Material Sourcing, connectedTo, Trend Research>
+<Material Sourcing, designs, Quality Check>
+<Material Sourcing, inspects, Quality Check>
+<PR and Media Outreach, connectedTo, Material Sourcing>
+<PR and Media Outreach, partOf, E_commerce Management>
+<Packaging, connectedTo, Fabric Innovation>
+<Packaging, connectedTo, Marketing Campaign>
+<Packaging, connectedTo, Material Sourcing>
+<Product Photography, connectedTo, Quality Check>
+<Quality Check, connectedTo, Ready_to_Wear Collection Launch>
+<Ready_to_Wear Collection Launch, connectedTo, Customer Feedback Analysis>
+<Styling, connectedTo, Inventory Management>
+<Styling, connectedTo, Trend Research>
+<Styling, connectedTo, end>
+<Trend Research, sketches, Inventory Management>
+<start, connectedTo, Embroidery and Embellishment>
diff --git a/test/mermaid/hard/mermaid_97.mmd b/test/mermaid/hard/mermaid_97.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..393383d1949ffcc644daedab42fc4df77fa5e0c2
--- /dev/null
+++ b/test/mermaid/hard/mermaid_97.mmd
@@ -0,0 +1,104 @@
+graph LR
+    N0([start])
+    N1[(Team Building Activities)]
+    N2[/Employee Relations/]
+    N3(HR Analytics)
+    N4[Disciplinary Procedures]
+    N5[(Compensation and Benefits)]
+    N6[[Employee Engagement Surveys]]
+    N7[/Health and Safety Management/]
+    S0(( ))
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Offer Management
+        nest0_0[[Succession Planning]]
+        nest0_1([HR Information System Implementation])
+        nest0_2[/Employee Recognition Programs/]
+    end
+    subgraph Wellness Programs
+        nest1_0[Union Negotiations]
+        nest1_1[[Organizational Development]]
+        nest1_2[/Remote Work Policy/]
+        nest1_3[/Compliance Management/]
+    end
+    N0 --> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 -.-> N5
+    N5 -.-> N6
+    N6 --> N7
+    nest0_0 --> nest0_1
+    nest0_1 -.-> nest0_2
+    N5 -.-> nest0_0
+    nest0_2 --> N1
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    nest1_2 --> nest1_3
+    N3 --> nest1_0
+    nest1_3 --> N4
+    N3 -.-> S0
+    S0 --> N7
+    S0 --> N5
+    S0 -.-> N6
+    N2 --> S1
+    S1 --> N4
+    S1 --> N6
+    S1 -.-> N5
+    N0 --> M0
+    N1 --> M0
+    M0 -.-> N3
+    N0 --> M2
+    N1 -.-> M2
+    M2 --> N3
+    style N0 fill:#F6F6F6,stroke:#CFCFCF
+    style N1 fill:#FAEBF3,stroke:#F7BEE0
+    style N2 fill:#FAEBF3,stroke:#F7BEE0
+    style N3 fill:#FAEBF3,stroke:#F7BEE0
+    style N4 fill:#F6F6F6,stroke:#CFCFCF
+    style N5 fill:#FAEBF3,stroke:#F7BEE0
+    style N6 fill:#EBEBEB,stroke:#E0E0E0
+    style N7 fill:#FAEBF3,stroke:#F7BEE0
+    style S0 fill:#EBEBEB,stroke:#E0E0E0
+    style S1 fill:#EBEBEB,stroke:#E0E0E0
+    style M0 fill:#EBEBEB,stroke:#E0E0E0
+    style M2 fill:#F6F6F6,stroke:#CFCFCF
+    style nest0_0 fill:#FAEBF3,stroke:#F7BEE0
+    style nest0_1 fill:#EBEBEB,stroke:#E0E0E0
+    style nest0_2 fill:#FAEBF3,stroke:#F7BEE0
+    style nest1_0 fill:#EBEBEB,stroke:#E0E0E0
+    style nest1_1 fill:#FAEBF3,stroke:#F7BEE0
+    style nest1_2 fill:#F6F6F6,stroke:#CFCFCF
+    style nest1_3 fill:#F6F6F6,stroke:#CFCFCF
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#F7BEE0,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#E0E0E0,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#CFCFCF,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#CFCFCF,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_97.txt b/test/mermaid/hard/mermaid_97.txt
new file mode 100644
index 0000000000000000000000000000000000000000..b9f53c6dd8793eb0347882cc9cc3ae70cc513fa3
--- /dev/null
+++ b/test/mermaid/hard/mermaid_97.txt
@@ -0,0 +1,31 @@
+<Compensation and Benefits, connectedTo, Employee Engagement Surveys>
+<Compensation and Benefits, connectedTo, Succession Planning>
+<Compliance Management, connectedTo, Disciplinary Procedures>
+<Compliance Management, partOf, Wellness Programs>
+<Disciplinary Procedures, connectedTo, Compensation and Benefits>
+<Employee Engagement Surveys, connectedTo, Health and Safety Management>
+<Employee Recognition Programs, connectedTo, Team Building Activities>
+<Employee Recognition Programs, partOf, Offer Management>
+<Employee Relations, connectedTo, Compensation and Benefits>
+<Employee Relations, connectedTo, Disciplinary Procedures>
+<Employee Relations, connectedTo, Employee Engagement Surveys>
+<Employee Relations, connectedTo, HR Analytics>
+<HR Analytics, connectedTo, Compensation and Benefits>
+<HR Analytics, connectedTo, Disciplinary Procedures>
+<HR Analytics, connectedTo, Employee Engagement Surveys>
+<HR Analytics, connectedTo, Health and Safety Management>
+<HR Analytics, connectedTo, Union Negotiations>
+<HR Information System Implementation, connectedTo, Employee Recognition Programs>
+<HR Information System Implementation, partOf, Offer Management>
+<Organizational Development, connectedTo, Remote Work Policy>
+<Organizational Development, partOf, Wellness Programs>
+<Remote Work Policy, connectedTo, Compliance Management>
+<Remote Work Policy, partOf, Wellness Programs>
+<Succession Planning, connectedTo, HR Information System Implementation>
+<Succession Planning, partOf, Offer Management>
+<Team Building Activities, connectedTo, Employee Relations>
+<Team Building Activities, connectedTo, HR Analytics>
+<Union Negotiations, connectedTo, Organizational Development>
+<Union Negotiations, partOf, Wellness Programs>
+<start, connectedTo, HR Analytics>
+<start, connectedTo, Team Building Activities>
diff --git a/test/mermaid/hard/mermaid_98.mmd b/test/mermaid/hard/mermaid_98.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..5b7878cf1a257fc432855428a0c8fd97119ab52d
--- /dev/null
+++ b/test/mermaid/hard/mermaid_98.mmd
@@ -0,0 +1,94 @@
+graph RL
+    N0([Candidate Sourcing])
+    N1{Skill Development Programs}
+    N2[/Employee Recognition Programs/]
+    N3[(Grievance Handling)]
+    N4[/Recruitment Planning/]
+    N5[/Employee Training/]
+    N6[/Performance Appraisal/]
+    N7[Workforce Planning]
+    S1(( ))
+    M0(( ))
+    M2(( ))
+    subgraph Talent Management
+        nest0_0[Succession Planning]
+        nest0_1(Exit Interviews)
+        nest0_2{HR Analytics}
+        nest0_3{Leadership Training}
+    end
+    subgraph Conflict Resolution
+        nest1_0[Organizational Development]
+        nest1_1([Leave Management])
+        nest1_2{Team Building Activities}
+    end
+    N0 -.-> N1
+    N1 -.-> N2
+    N2 --> N3
+    N3 -.-> N4
+    N4 -.-> N5
+    N5 --> N6
+    N6 -.-> N7
+    nest0_0 -.-> nest0_1
+    nest0_1 -.-> nest0_2
+    nest0_2 --> nest0_3
+    N3 --> nest0_0
+    nest0_3 -.-> N2
+    nest1_0 -.-> nest1_1
+    nest1_1 -.-> nest1_2
+    N1 --> nest1_0
+    nest1_2 -.-> N3
+    N3 --> S1
+    S1 --> N6
+    S1 --> N7
+    S1 --> N5
+    N2 --> M0
+    N0 --> M0
+    M0 --> N4
+    N2 --> M2
+    N1 --> M2
+    M2 --> N4
+    style N0 fill:#BBDEFB,stroke:#2196F3
+    style N1 fill:#FFFDE7,stroke:#FFF176
+    style N2 fill:#BBDEFB,stroke:#2196F3
+    style N3 fill:#FFFDE7,stroke:#FFF176
+    style N4 fill:#FFFDE7,stroke:#FFF176
+    style N5 fill:#BBDEFB,stroke:#2196F3
+    style N6 fill:#FFFDE7,stroke:#FFF176
+    style N7 fill:#E0E6E9,stroke:#AABEC6
+    style S1 fill:#BBDEFB,stroke:#2196F3
+    style M0 fill:#E0E6E9,stroke:#AABEC6
+    style M2 fill:#BBDEFB,stroke:#2196F3
+    style nest0_0 fill:#BBDEFB,stroke:#2196F3
+    style nest0_1 fill:#BBDEFB,stroke:#2196F3
+    style nest0_2 fill:#E0E6E9,stroke:#AABEC6
+    style nest0_3 fill:#E0E6E9,stroke:#AABEC6
+    style nest1_0 fill:#E0E6E9,stroke:#AABEC6
+    style nest1_1 fill:#FFFDE7,stroke:#FFF176
+    style nest1_2 fill:#BBDEFB,stroke:#2196F3
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#2196F3,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#FFF176,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#AABEC6,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#2196F3,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/hard/mermaid_99.mmd b/test/mermaid/hard/mermaid_99.mmd
new file mode 100644
index 0000000000000000000000000000000000000000..7b28fbc9d5e8132bbf4e50ba9dd707799f8f9cf8
--- /dev/null
+++ b/test/mermaid/hard/mermaid_99.mmd
@@ -0,0 +1,130 @@
+graph RL
+    N0([start])
+    N1[Wellness Programs]
+    N2[HR Budgeting]
+    N3(Leave Management)
+    N4([Candidate Sourcing])
+    N5[(Interview Scheduling)]
+    N6[(Performance Appraisal)]
+    N7(Skill Development Programs)
+    N8[Union Negotiations]
+    S0(( ))
+    S1(( ))
+    S2(( ))
+    M0(( ))
+    M1(( ))
+    M2(( ))
+    subgraph Employee Relations
+        nest0_0([Succession Planning])
+        nest0_1{Global Mobility Programs}
+        nest0_2{Employee Recognition Programs}
+        nest0_3{Disciplinary Procedures}
+    end
+    subgraph Workforce Planning
+        nest1_0([Compliance Management])
+        nest1_1[Recruitment Planning]
+        nest1_2[/Organizational Development/]
+    end
+    N0 -.-> N1
+    N1 --> N2
+    N2 --> N3
+    N3 --> N4
+    N4 --> N5
+    N5 --> N6
+    N6 -.-> |trains| N7
+    N7 -.-> |manages| N8
+    nest0_0 -.-> |onboards| nest0_1
+    nest0_1 --> nest0_2
+    nest0_2 -.-> nest0_3
+    N1 -.-> nest0_0
+    nest0_3 --> N6
+    nest1_0 -.-> nest1_1
+    nest1_1 --> nest1_2
+    N4 -.-> nest1_0
+    nest1_2 --> N5
+    N5 --> S0
+    S0 --> N7
+    S0 -.-> N8
+    N2 -.-> S1
+    S1 --> N5
+    S1 --> N7
+    S1 --> N6
+    N5 --> S2
+    S2 --> N7
+    S2 --> N8
+    N0 --> |engages| M0
+    N3 --> M0
+    N1 -.-> |integrates| M0
+    N2 --> M0
+    M0 --> N6
+    N0 --> M1
+    N2 --> M1
+    N5 --> M1
+    N3 --> M1
+    M1 --> N8
+    N4 -.-> |disciplines| M2
+    N0 -.-> M2
+    M2 --> N6
+    style N0 fill:#EFE6FF,stroke:#C2B2F0
+    style N1 fill:#EFE6FF,stroke:#C2B2F0
+    style N2 fill:#B2EBF2,stroke:#00BCD4
+    style N3 fill:#E8EAF6,stroke:#7986CB
+    style N4 fill:#E8EAF6,stroke:#7986CB
+    style N5 fill:#EFE6FF,stroke:#C2B2F0
+    style N6 fill:#E8EAF6,stroke:#7986CB
+    style N7 fill:#E8EAF6,stroke:#7986CB
+    style N8 fill:#B2EBF2,stroke:#00BCD4
+    style S0 fill:#E8EAF6,stroke:#7986CB
+    style S1 fill:#E8EAF6,stroke:#7986CB
+    style S2 fill:#E8EAF6,stroke:#7986CB
+    style M0 fill:#B2EBF2,stroke:#00BCD4
+    style M1 fill:#E8EAF6,stroke:#7986CB
+    style M2 fill:#EFE6FF,stroke:#C2B2F0
+    style nest0_0 fill:#E8EAF6,stroke:#7986CB
+    style nest0_1 fill:#E8EAF6,stroke:#7986CB
+    style nest0_2 fill:#E8EAF6,stroke:#7986CB
+    style nest0_3 fill:#B2EBF2,stroke:#00BCD4
+    style nest1_0 fill:#B2EBF2,stroke:#00BCD4
+    style nest1_1 fill:#E8EAF6,stroke:#7986CB
+    style nest1_2 fill:#E8EAF6,stroke:#7986CB
+    classDef handwritten font-family:Comic Sans MS,font-size:14px,color:#2b2b2b;
+    linkStyle 0 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 1 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 2 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 3 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 4 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 5 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 6 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 7 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 8 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 9 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 10 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 11 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 12 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 13 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 14 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 15 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 16 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 17 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 18 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 19 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 20 stroke:#00BCD4,stroke-width:2px,fill:none;
+    linkStyle 21 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 22 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 23 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 24 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 25 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 26 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 27 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 28 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 29 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 30 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 31 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 32 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 33 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 34 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 35 stroke:#7986CB,stroke-width:2px,fill:none;
+    linkStyle 36 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 37 stroke:#C2B2F0,stroke-width:2px,fill:none;
+    linkStyle 38 stroke:#000000,stroke-width:2px,fill:none;
+    linkStyle 39 stroke:#00BCD4,stroke-width:2px,fill:none;
\ No newline at end of file
diff --git a/test/mermaid/medium/mermaid_10.png b/test/mermaid/medium/mermaid_10.png
new file mode 100644
index 0000000000000000000000000000000000000000..06c3248e950517b72d639e721365e1f0e29367dc
--- /dev/null
+++ b/test/mermaid/medium/mermaid_10.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:d4c17b35e7563409c7fa73d6ce1660547f0a035b9a02027a42807e5956dd3c3b
+size 187467
diff --git a/test/mermaid/medium/mermaid_100.png b/test/mermaid/medium/mermaid_100.png
new file mode 100644
index 0000000000000000000000000000000000000000..0a29cbeb5540d720a0a291e8089f252edb1f8ce6
--- /dev/null
+++ b/test/mermaid/medium/mermaid_100.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:2bab448d2d0ebbc03f2083a337ec664b3a7d01ecd0d98fd703aea885c6eed052
+size 211972
diff --git a/test/mermaid/medium/mermaid_11.png b/test/mermaid/medium/mermaid_11.png
new file mode 100644
index 0000000000000000000000000000000000000000..49367074b5f4d07801df83c59e5aefded394ff16
--- /dev/null
+++ b/test/mermaid/medium/mermaid_11.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:f73ab83ef8ff1508f61e3d59588718d3154055edeec5c43afbf115370cdc605b
+size 305990
diff --git a/test/mermaid/medium/mermaid_112.png b/test/mermaid/medium/mermaid_112.png
new file mode 100644
index 0000000000000000000000000000000000000000..c7db37a9a5249d36fd56e96009ab1ee369eb2501
--- /dev/null
+++ b/test/mermaid/medium/mermaid_112.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b70e793733d4410e4726a42a343037da4fb9f4cf2187d872d7ba60d4aa8b9b64
+size 181356
diff --git a/test/mermaid/medium/mermaid_116.png b/test/mermaid/medium/mermaid_116.png
new file mode 100644
index 0000000000000000000000000000000000000000..5696d6f99b1668fd59b0db800796605e6dd81eab
--- /dev/null
+++ b/test/mermaid/medium/mermaid_116.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:fb5fbf2dae5bfc88ab527e871ab5aca15dae8d4f983519ffe61c5baa169748e0
+size 173719
diff --git a/test/mermaid/medium/mermaid_117.png b/test/mermaid/medium/mermaid_117.png
new file mode 100644
index 0000000000000000000000000000000000000000..b997ad70ee1fea29191bab93a3cc2b0230f5c471
--- /dev/null
+++ b/test/mermaid/medium/mermaid_117.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3515cab7bad9938d9bd971d1e3341fc8a2885a8830612faf23f184fc2419bfe8
+size 280106
diff --git a/test/mermaid/medium/mermaid_127.png b/test/mermaid/medium/mermaid_127.png
new file mode 100644
index 0000000000000000000000000000000000000000..0606eaa05dc86ee90a831a456295e962a1040bbc
--- /dev/null
+++ b/test/mermaid/medium/mermaid_127.png
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:79c806260283cc516a5f0999976dedbdf45a39fc87b51daaea821d1688099453
+size 274544
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