How do I crack substr hash?

[epixoip]

Normally I'd be all like "THREAD NECRO" and ban you for posting on a thread that's almost 3 years old, but since it's kind of my fault that you did so, I can't really get mad.

I'm not entirely sure if this is the "final" version of this program or not, but it should probably mostly work.

http://strcpy.io/md5substr.c

Edit: Just read that you're actually looking for substr(md5($pass),12,20) so this program won't work as-is, but I trust you can modify it to suit your needs.