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