2, 4, 6
2, 4, 6, 1, 2, 3, 5, 6
2, 4, 6, 1, 2, 3, 5, 6, 1, 10, 12, 13, 14, 16, 17, 18, 19, 2, 20, 3, 4, 4а, 5, 6, 8, 9