15x15 puzzle
Time:
8
2
4
2
4
2
4
1
2
2
3
2
3
1
1
2
1
3
3
1
1
3
4
1
3
4
1
1
2
4
2
2
2
5
2
3
2
15 15
15
15
4  2  7
4  6
1  3
1  1  2
1  7
1  4
1  2
3
5
4
4  2
3  2  8
15
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