20x15 puzzle
Time:
5 5
1
5
2
9 2
5
8 1
5
1
5
2
5
2
5
1
6
1
5
5 2
4
2 2 2 2 1
2
2
 
1
3
4
6  2
6  5
3  2  1
3  1  1  1
11
13
17
17
8
 
 
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