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