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