[[1], [0, 2, 3, 4, 5, 7, 8], [1, 3, 4, 5, 6, 7, 8], [1, 2, 4, 5, 6, 7, 8], [1, 2, 3, 5, 6, 7, 8], [1, 2, 3, 4, 6, 7, 8], [2, 3, 4, 5, 7, 8, 9], [1, 2, 3, 4, 5, 6, 8], [1, 2, 3, 4, 5, 6, 7], [6]]
8
1 2 3 4 5 6 7 10