20 7
3 3 4 1 3 2 0 1 4 3 4 0 0 1 0 4 4 5 5 0
1 1 0 0 1 1 0 1 0 0 0 0 0 0 1 1 1 0 0 1
0 0 1 1 2 1 2 2 1 1 0 1 1 3 2 2 1 6 4 4
3 2 3 3 6 2 2 4 3 4 4 5 3 6 6 5 7 8 8 9
