   
                             1    20  21       300          
                       2    4  5       315     
                       2    19  18 20       330          
                   3    5  6       245                    
                    3    20  21        0                         
                       4    4  5.6       15    
                       4    20  21       30     
                      5    5  6       45                    5    21  22       60    
                     6    5  6 .7       75    
                      6    21  22       90                    
                      7    7  8       105    
                      7    23  24       120         
                       8    7  8       135    
                      8    23  22.21       150    
                      9    8  7 . 9       165     
                      9    23  22 .24       180     
                     10    8  9       195     
                     10    23  24       210     
                      11    7  8       225          
                    11    21  22       240    
                     12    7  8       255              
                      12    22  21 .23       270                   
                     1    6  7       285                      