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