1, 2, 3, 6, 8
1, 2, 3, 6, 8, 1а, 3, 5
1, 2, 3, 6, 8, 1а, 3, 5, 1, 10, 11а, 12, 13, 14, 16, 18, 2, 20, 3, 4, 5, 6, 7, 8, 9