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