1.80000 a aa
25.5000 a b
27.1200 cd ddd
27.8000 a cd
29.8000 a ga

               Maximum Tree Height = 29.8000
     100%         75%            50%            25%            0% 
     987654321098765432109876543210987654321098765432109876543210 

      ----------------------------------------------------------- a
     |    |   |                                               |  
     |    |   |                                                -- aa
     |    |   |                                                  
     |    |    -------------------------------------------------- b
-----|    |                                                      
     |     ------------------------------------------------------ cd
     |     |                                                     
     |      ----------------------------------------------------- ddd
     |                                                           
      ----------------------------------------------------------- ga