15x23 puzzle
Time:
1 2
4
2
9
12
1
13
1
13
1
13
1
1
13
1
1
12
1
2
8
1
2
2
2 3
1  6
2
1
 
 
8
8
6
7
10
10
8
9
10
10
9
8
4
 
5
 
 
 
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