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