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