8 0 9 1 -1 6 7 -1 8 9 0 10 0 7 -1 9 1 10 2 5 1 -1 -1 -1 -1 6 3 7 10 8 4 4 0 1 -1 -1 3 6 10 7 4 10 2 6 5 7 5 2