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