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the solution:
8
5
2
9
6
1
3
7
4
1
3
6
4
7
5
8
9
2
9
7
4
3
8
2
6
1
5
5
6
7
1
2
4
9
8
3
3
1
8
7
5
9
2
4
6
2
4
9
8
3
6
1
5
7
6
8
3
5
1
7
4
2
9
7
9
1
2
4
3
5
6
8
4
2
5
6
9
8
7
3
1