1, 10, 2, 3, 4, 8
1, 10, 2, 3, 4, 8, 1, 10, 13, 14, 18, 2, 20, 4, 5, 7, 9
1, 10, 2, 3, 4, 8, 1, 10, 13, 14, 18, 2, 20, 4, 5, 7, 9, 1, 2, 3