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