Rough Dentogram ( clustering based on segment distance )

   AH  63  68 
   !  
   7--AL   1   9 
   !     
   8-----AL  69  77 
   !        
   !        AH  30  42 
   !        !  
   !        4--AH  10  25 
   !        !     
   !        !     AL  26  29 
   !        !     !  
   !        2-----3--AH  25  25 
   !        !           
   !        !           AH  48  63 
   !        !           !  
   6--------5-----------1--AL  43  47 
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