15x21 puzzle
Time:
2
5
4
3
5
10
13
9
3
13
2
10
1
5
4
1
2
9
1
9
2
2
4
4
4
6
7
8
7
8
5 2
9 2
2 4 2
2 4 2
2 2 2
2 2
3
3
1 3
5
Opacity:
Original image
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