Rough Dentogram ( clustering based on segment distance )

   AE  36  39 
   !  
   6--AE  25  28 
   !     
   4-----AE  14  16 
   !        
   !        AL  11  13 
   !        !  
   2--------1--AH   7  10 
   !              
   3--------------AL  17  24 
   !                 
   5-----------------AL  29  35 
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