nice one

I like this one.

I hadn't read the description till the end. Not my first time 🙄

i added more personalized assertion messages to Python

or perhaps just a reminder from the description:

cheater u can't use restricted characters!

The error message is confusing:

cheater u can't use digits !!!: True should equal False

Maybe or math operators should be added.

You used + in your code.

Hmmm... Thanks.

You used .strip, there's "str" there.

I solved the problem according to all the conditions. What does this inscription mean: Imagine using str in your solution: 'str' should equal False? All tests have been passed. And I didn't use STR!

I was too emotional after 1000+ failed attempts

Interesting kata :)