Rough Dentogram ( clustering based on segment distance )

    L 48  53  
   !  
   7-- L 27  30  
   !     
   !      L 65  68  
   !     !  
   !     9-- H 54  64  
   !     !     
   !     10---- E 69  70  
   !     !        
   !     !         E 42  47  
   !     !        !  
   !     !        6-- E  3   8  
   !     !        !     
   !     !        1----- E 31  37  
   !     !        !        
   8-----3--------4-------- H 17  26  
   !                          
   !                           L 38  41  
   !                          !  
   2--------------------------5-- L  9  16  
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