1, 2, 3, 1, 4, 2, 5, 3, 1, 6, 4, 2, 7, 5, 3, 8, 1, 6, 4, 9, 2, 7, 5, 10, 3, 8, 1, 6, 11, 4, 9, 2, 7, 12, 5, 10, 3, 8, 13, 1, 6, 11, 4, 9, 14, 2, 7, 12, 5, 10, 15, 3, 8, 13, 1, 6, 11, 16, 4, 9, 14, 2, 7, 12, 17, 5, 10, 15, 3, 8, 13, 18, 1, 6, 11, 16, 4, 9, 14, 19, 2, 7, 12, 17, 5, 10