20x15 puzzle
Time:
5
4
4
4
3
4
3
4
4
4
3
3
3
3
4
3
5
3
5
2
4
2
4
2
5
2
6
2
9
2
9
1
9
1
8
1
7
1
7
2
4
6
7
1  2  8
2  1  13
20
20
20
1
 
5
9
15
19
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