15x20 puzzle
Time:
4
3
2
14 14 14 14 1
2
3
6
3
7
3
9
3
7
 
 
 
4  4
4  4
5  4
5
5  1
5  1
4  1
4  3
5  4
10
5  4
9
10
5  2  1
 
 
 
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