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