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