15x20 puzzle
Time:
3
1
14 14 7
3
6
4
6
3
1
5
3
1
9
2
13 1
11
 
 
2
9
8
9
9
9
6  3
4  3
3  5
2  5
2  3  2
4  2
4  3
10
 
 
 
 
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