1, 6, 2, 7, 3, 8, 4, 9, 5, 10, 6, 11, 7...
7, 5, 8, 6, 9, 7, 10, 8, 11, 9, 12, 10...
10, 5, 8, 3, 6, 1, 4.
3, 8, 4, 9, 5, 10, 6, 11, 7, 12, 8, 13...
6, 9, 5, 8, 4, 7, 3, 6, 2, 5, 1, 4, 0, 3.
4, 7, 3, 6, 2, 5, 1, 4, 0, 3.
7, 4, 6, 3, 5, 2, 4, 1, 3, 0, 2.