8 5 2 1 8 4 -1 -1 -1 -1 -1 0 0 0 0 -1 -1 -1 -1 0 -1 -1 0 0 0 -1 -1 0 0 -1 -1 -1 0 0 0 -1 -1 -1 -1 0 -1 -1 0 0 0 -1
2 1 2 2 2 3 2 4 3 4 4 4 4 3 5 3 6 3 6 4 7 4 8 4