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