1, 2, 3, 4, 5, 6, 1, 3, 2, 7, 4, 1, 6, 5, 2, 3, 8, 9, 6, 2, 5, 8, 1, 4, 7, 2, 3, 1, 6, 8, 4, 3, 2, 1, 8, 9, 10, 11, 2, 15, 12, 9, 3, 4, 5, 6, 1, 3, 2, 7, 4, 16, 6, 5, 17, 11, 8, 9, 12, 4, 5, 8, 18, 16, 7, 2, 3, 4, 6, 8, 1, 16, 14, 20, 8, 9, 10, 11, 2, 15, 16, 9, 11, 4, 5, 7, 1, 3, 2, 10, 4, 16
