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