8 0 0 x 6 0 0
1 0 2 4 x 7 6 8
8 0 0 x 6 0 0
1 0 2 4 x 7 6 8

1 0 2 4 x 7 6 8
8 0 0 x 6 0 0
1 0 2 4 x 7 6 8
8 0 0 x 6 0 0