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