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