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