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