Rough Dentogram ( clustering based on segment distance )

   AL  59  64 
   !  
   5--AH  27  38 
   !     
   4-----AH  49  58 
   !        
   2--------AH  20  23 
   !           
   3-----------AL  39  48 
   !              
   !              AL  85  91 
   !              !  
   !              8--AH  80  84 
   !              !     
   !              9-----AH  92 105 
   !              !        
   !              7--------AH   5  20 
   !              !           
   6--------------1-----------AH  65  80 
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