Rough Dentogram ( clustering based on segment distance )

   AE 78  81  
   !  
   6--AE 40  42  
   !     
   7-----AE 71  75  
   !        
   2--------AL 36  39  
   !           
   3-----------AH 56  68  
   !              
   !              AL 50  55  
   !              !  
   !              4--AH 43  49  
   !              !     
   5--------------1-----AH 22  35  
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