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