# Registering X## 300
Do you have your ex's registered?
Author: SVM
file:`chal.txt`
# Solution
chal.txt that is given to us contains the following:```Here's a regex 4 u. Match it if you can...
infernoCTF{.(?<=H){21}.[a-z](?<=\+a){1024}[a-z][a-j](?