30x15 puzzle
Time:
2 1
5
1
5
1
5
1
5
1
6
1
6
1
6
1
6
1
6
1
1
6
1
2
6
1
1
6
1
1
7
1
7
1
7
1
8
11 1
6
5 6 5 1
5
 
 
 
 
18
1
4  1  1
1  2
5
14  1
23
23
22
22
22
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