20x15 puzzle
Time:
1
2
5
2
5
2
5
5 2
2
2
2
1
1
1
1
1
2
5 5 5 5 1
1
2
2
5
2
5
1
2
2
1
5
3
5
2
5
 
 
 
 
1
 
3  1
3  3  2
6
 
20
6  4  6
4  4  2  3
6  12
20
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