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