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