1           2           4          17
           2           1           3           8
           3           2           4           9
           4           1           3          24
           5           6           8          18
           6           5           7          19
           7           6           8          13
           8           5           7           2
           9          10          12           3
          10           9          11          16
          11          10          12          22
          12           9          11          23
          13          14          16           7
          14          13          15          20
          15          14          16          21
          16          13          15          10
          17           1           0           0
          18           5           0           0
          19           6           0           0
          20          14           0           0
          21          15           0           0
          22          11           0           0
          23          12           0           0
          24           4           0           0