20x15 puzzle
Time:
7 8 8 4 4 1
4
6 5 5 6 5
1
5
2
5
2
5
2
4
1
3 3 3 3 3
1
 
 
 
 
2
3
3  2  5
3  9
20
20
20
10
 
3
5  1
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