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