in reply to How do I use Perl?

a good place to start and get an extra leg up on the process is by learning how to rtfm, so I urge you to go, now, and invest a few minutes, and learn

How to RTFM

you'll thank the author afterwards (and learning perl will become lots easier).

Of all the things I've lost, I miss my mind the most.
perl -e "$q=$_;map({chr unpack qq;H*;,$_}split(q;;,q*H*));print;$q/$q;"