20x15 puzzle
Time:
2
3
2
3
3
3
3
3
3
3
3
3
3
3
3
3
3
2
4
2
5
2
2
2
2
3
2
2
3
2
2
2
2
3
2
2
3
1
3
1
3
2
3
18  1
17  2
7  1  1
 
 
 
 
3
3
1
1
2
9  1  4
20
20
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