15x17 puzzle
Time:
1
2
7
2
5
1
3
8
1
3
2
9
5
8
1
2
2
6
2
2
1
2
5
1
3
2
3
4
1
1
2
2 1
5
5
3 1 3
2 3 1
5 2 3
1 3 1 2 1
6 2
9
7 1
5 2
7
6
2
2 1
3
Opacity:
Original image
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