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