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

3 0 0  2 0 0  0 7 0
8 0 0  0 0 0  0 0 2
0 4 0  0 0 7  0 0 3

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

hard
