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