7 17
2 1
1 1 4 4 0 1 4 0 0 1 4 0 0 1 4 0 0 1 4 0
3 5 4 4 0 2 4 0 2 2 4 4 4 4 2 2 0 4 2 0
5 5 0 3 0 2 0 0 3 0 2 2 0 3 0 0 0 0 3 3 3 3 0 0 0 0 0