2, 3, 5, 7, 8, 9, 6, 4, 1
5, 7, 8, 9, 1, 2, 4, 3, 6
6, 8, 9, 5, 7, 1, 2, 3, 4
8, 5, 7, 9, 1, 2, 3, 6, 4