20x15 puzzle
Time:
3
1
9
2
8
7
1
7
2
6
2
5
2
5
2
4
2
4
3
3
1
2
1
3
1
3
3
3
3
3
1
3
1
3
2
2
1
1
2
1 5 1
2 4 2 2
4
5
7
9
11 8
20
20
Opacity:
Original image
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