
5 0 0  0 0 0  0 0 0
0 7 0  0 0 0  4 0 2
1 0 0  0 0 2  0 0 5

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

2 0 0  9 0 0  0 0 3
3 0 7  0 0 0  0 4 0
0 0 0  0 0 0  0 0 9

hard
