15x21 puzzle
Time:
2
1
7
2
2
3
4
5
1
11
3
8
4
9
2
9
3
9
4
1
2
2
2
4
4
2
1
1
2
2
 
 
2  4
7  2
7  1
1  7
9
8
8
7  2
7
3  3
3  2
1
3  1
3  2
2  8
2  7
 
 
 
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