15x20 puzzle
Time:
2
6
4
2
5
5
2
2
1
6
4
2
4
12
20
2
17
2
16
2
2
5
8
8
1
4 1
6
4
5
3
4
7
7
8
8
8
1 6
1 5
7
7
7
7
Opacity:
Original image
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