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