15x15 puzzle
Time:
1
3
1
2
1
1
2
1
1
2
1
1
4
1
4
1
4
1
6
1
5
1
5
1
4
1
5
1
5
1
1
3
1
3
1
3
1  1
1  1
7  1
13
9
5  7
1  8
1  3  3
1  1
1
15
 
 
 
 
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