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