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