
0 0 0  0 0 4  0 6 0
0 0 0  7 3 0  9 0 0
0 5 0  0 0 9  0 0 0

9 0 0  5 1 0  8 0 0
0 0 0  0 0 0  0 0 0
0 0 5  0 4 7  0 0 9

0 0 0  3 0 0  0 2 0
0 0 6  0 8 1  0 0 0
0 8 0  2 0 0  0 0 0

hard
