This is a late comment, but I hope not out of place.

My daughter and I were working on a Jumble puzzle with a word we just couldn't crack. So, of course, I decided to throw the Perl wrench at it. As I thought about the algorithm, regular expressions just seemed like a natural choice.

I have to say this solution amazed me (I admit it, I'm not an experienced or professionally educatued programmer). I mean look at: 12 lines! And the solution -- how clever! Rather than looking for a match, it eliminates non-matches. I've learned something here.

OK, so I needed to solve a jumble, not find all possibilities. Two quick changes to one line, and I'm off:

    next unless ( length $word  == $#ARGV + 2 );
[download]

Great post, great solution. Thanks jonnybe