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