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9
2
4
1
7
8
1
5
3
3
6
4
5
3
9
7
2
6
1
6
8
9
7
1
4
2
9
8
9
3
2
8
6
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9
2
7
8
1
3
4
5
1
3
6
4
9
7
5
2
1
6
8
3
6
9
7
1
4
8
3
2
2
9
8
9
6
1
2
3
4
5
6
7
8
9
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