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