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

6 0 0  0 5 0  0 0 0
0 0 7  0 0 8  0 9 0
0 3 0  1 0 0  2 0 0

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

unsolvable #553
