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