Need a stable comparison

So basically, the user might accidentally typed in either lower case or upper case letters for the answer (And sometimes a space too).

Th strings were given in the brief~

And, I ask around for help. They taught me how use these strings.

Apparently, it looks alright :)

However, when I run it, the problem is STILL the same! With someone's help, I managed to get it to run properly.

Ohhhhh, ok