1, 1/1, 1/2, 10, 11, 12, 13, 14, 15, 16/1, 16/2, 17, 18/1, 18/2, 19, 2, 2/1, 2/2, 20, 21, 22, 3, 3/1, 3/2, 4, 5, 6, 7, 8, 9