20x15 puzzle
Time:
2 2
2
2
3
3
3
1
4
1
5
1
5
1
5
1
5
1
4
1
4
1
4
1
2
4
4
2
2
3
5
2
4
2
4
1
2
5
1
3
1
1
2
 
 
 
1
11  2  3
4  1  2
7
4  8
8  2
14
17
9  4
9
5
1
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