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

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

6 9 0  0 0 0  0 0 0
0 0 0  0 2 0  0 8 0
0 0 0  0 0 0  2 0 0

hard
