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