1, 2
1, 2, 10, 11, 12, 14, 15, 17, 18, 2, 20, 21, 22, 3, 8
1, 2, 10, 11, 12, 14, 15, 17, 18, 2, 20, 21, 22, 3, 8, 1, 2, 4, 5, 6, 8, 9