21x15 puzzle
Time:
5
1
6
1
4
1
4
1
3
1
3
1
3
1
4
1
1
3
1
2
5
1
11
1
1
7
1
3
1
3
1
3
1
3
1
4 5
1
5
1
5
1
5
 
 
1
2
5
1
1  1
2  1  4
4  1  3  5
21
21
21
3
1
16  3
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