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