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