15x20 puzzle
Time:
5
6
5
4
5
1
1
2
1
5
1
5
1
5
1
1
4
1
2
1
1
1
4
1
1
1
4
1
2
4
4
3
1
7
2
3
2
7
3
1
1
1
1 3
7
3 1
3
4
1 3
1 1 3
1
1 2 1
3
1 2
3 4 1
12
15
9 5
15
Opacity:
Original image
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