1, 6, 7
1, 6, 7, 1, 10, 11, 12, 13, 15, 17, 18, 19, 2, 22, 24, 25, 27, 28, 3, 30, 32, 33, 34, 35, 36, 37, 38, 4, 40, 42, 44, 5, 6, 7, 8, 9