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