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