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