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