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