20x15 puzzle
Time:
3
4
2
5
2
5
2
5
2
4
3
4
2
3
2
4
2
4
4
3
4
3
4 4 4 4 4 4 4 4 4
1
 
 
11
20
20
1  1  11
 
 
1
3
5
11
11
11
1  2
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