       0    0    0    0    0    0    8    8    8    8    8
      30    0    0    0    0    0    8    8    8    8    8
      40    0    0    0    0    0    6    7    8    8    8
      50    0    0    0    0    0    6    6    7    7    7
      60    0    0    0    0    0    4    5    6    6    6
