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