20x15 puzzle
Time:
12 6
5
6
2
2
5
4
5
4
4
3
3
4
2
4
3
3
1
2
2
2
3
1
2 3 3 1 3 5
 
3
4
5  1
7  1  1  1
9  5  2
18
1  2  2  2
3
5  5
2  9
9
8
 
 
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