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