So the challenge was all about messaging the bot with (what they say 4 characters. But the bot didn't replied to me for any of my input. So I have tried to see what is all about with the given Flag: **RRQZQC1CIXDFPIXWVYLQ2**.

I have tried **https://www.dcode.fr/cipher-identifier** and it gave 3 star with *Affine Cipher*.

It has Automatic brute force decryption and gave:
A=1,B=23 UUTCTF1FLAGISLAZYBOT2
which was the flag
**UUTCTF{FLAGISLAZYBOT}**
So the whole task wasn't even about the bot.
Chall rating 0/5