
1 2 0  0 0 0  0 0 0
0 0 0  1 0 2  0 3 0
0 0 4  0 5 0  6 0 0

0 7 0  8 0 9  0 0 5
0 0 0  0 0 0  0 0 0
8 0 0  2 0 3  0 4 0

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

hard
