Rough Dentogram ( clustering based on segment distance )

    L194 198  
   !  
   2-- H192 193  
   !     
   !      L206 209  
   !     !  
   !     4-- H199 205  
   !     !     
   !     5----- H210 220  
   !     !        
   3-----1-------- H177 192  
   !                 
   7----------------- L231 241  
   !                    
   6-------------------- L221 230  
  /
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