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