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