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