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