[[0 1 2 3 4 5 6][0 1 2 3 4 5 6][0 1 2 3 4 5 6][0 1 2 3 4 5 6][0 1 2 3 4 5 6]]
[[0 2 0 1][1 0 2 0 1][0 2][0 0 1]]
[[2 0 1] [1 1] [0] [1 0 0 1 1]]
[[0 1][1 0 1][0 1]]
[[][1]]
[[0 2 0 1] [1] [0 1]]