1, 2
1, 2, 1, 12, 13, 14, 15, 2, 21, 22, 23, 28, 3, 30, 32, 33, 34, 35, 38, 40, 42, 43, 48, 5, 50, 53, 54, 55, 57, 59, 6, 7