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