20x15 puzzle
Time:
4
1
4
1
4
2
4
2
6
2
4
2
3
3
4
3
4
3
4
3
3
2
4
2
6 3
2
3
2
1
5 5 5 4 3
 
 
 
 
 
 
10  8
20
20
6  6  5
1  6
1  5
6
8
10  1
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