30x15 puzzle
Time:
2
4
2
4
2
3
2
4
2
4
2
4
2
4
2
4
2
4
3
1
4
3
4
3
4
3
4
3
4
4
1
4
3
4
3
4
3
1
4
3
2
4
3
3
4
3
4
4
3
5
5
3
5
5
23
23
14
1
1  2
1  3
4
5
6
 
2
2  20
23
23
23
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