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