       0    0    0    0    0    0    4    4    5    5    5
      10    0    0    0    0    0    6    6    6    6    6
      20    0    0    0    0    0    6    6    7    7    7
      30    1    1    1    1    1    7    7    7    7    7
      40    1    1    1    2    2    8    8    8    8    8
      50    2    2    2    2    2    8    8    8    8    8
      60    3    3    3    4    4    8    8    8    8    8
