Rough Dentogram ( clustering based on segment distance )

   DH 48  54  
   !  
   5--DL 38  46  
   !     
   !     DL 11  19  
   !     !  
   4-----1--DH  2  10  
   !           
   !           DL 29  37  
   !           !  
   2-----------3--DL 20  28  
  /
 /