Rough Dentogram ( clustering based on segment distance )

    E 48  49  
   !  
   6-- E  4   5  
   !     
   7----- L 50  54  
   !        
   4-------- L 29  37  
   !           
   8----------- H 55  64  
   !              
   !               L 11  19  
   !              !  
   !              1-- H  7  10  
   !              !     
   3--------------2----- H 20  28  
   !                       
   5----------------------- L 38  46  
   !                          
   9-------------------------- L 65  73  
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