1, 2, 3, 4, 5, 6, 8
1, 2, 3, 4, 5, 6, 8, 2, 3
1, 2, 3, 4, 5, 6, 8, 2, 3, 4, 7
1, 2, 3, 4, 5, 6, 8, 2, 3, 4, 7, 1, 2, 3, 4, 6