8 1 6 0 0 0 0 0 3
 3 5 7 0 0 0 0 8 0
 4 9 2 1 0 0 0 0 0
 0 0 3 8 1 6 0 0 0
 0 0 0 3 5 7 0 0 0
 0 0 0 4 9 2 1 0 0
 0 0 0 0 0 3 8 1 6
 0 2 0 0 0 0 3 5 7
 1 0 0 0 0 0 4 9 2