Su Doku
Hard 4 - Answer
2
4
9
6
3
8
1
7
5
1
5
6
2
4
7
8
9
3
3
7
8
1
5
9
4
2
6
9
2
3
8
6
5
7
4
1
6
1
4
9
7
3
2
5
8
7
8
5
4
1
2
3
6
9
8
6
1
7
9
4
5
3
2
4
3
2
5
8
6
9
1
7
5
9
7
3
2
1
6
8
4
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