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