15x20 puzzle
Time:
2
1
4 6 10 10 4
5
1
1
5
3
1
4
3
1
5
3
5
3
10 10 5 1
2
1
 
 
3
 
 
1
 
 
 
 
4  2
10
11
11
5  6
6  5
4  4
1  10
12
11
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