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