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