21x15 puzzle
Time:
7
1
6
6
6
6
6
6
5
1
6
1
6
1
5
1
5
4
1
4
1
4
1
4
2
4
1
4
1
4
2
4
3
5
1
21
21
21
21
12 1
7 2
1
1
1 2
1 4 9
Opacity:
Original image
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