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