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