0 0 0 0 4 5
0 0 0 0 4 4
0 0 0 3 4 4
0 0 0 0 3 4
0 0 0 3 4 5
0 0 0 2 3 5
0 0 0 3 3 5
0 0 0 1 2 3
0 0 1 2 3 4
