21x15 puzzle
Time:
6
5
4
5
1
2
3
2
3
5
1
5
4
4
4
4
3
4
3
5
1
5
3
5
4
2
1
2
2
3
5
4
3
3
1
7
7 2
2 4 3
3 2
1 1
2 1 2 3 2
4 8 2
4 8 5
21
21
Opacity:
Original image
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