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

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

0 0 0  6 0 0  0 0 0
9 0 7  0 8 0  1 0 0
8 0 0  0 0 9  0 0 4

hard
