Fixed the description

Well, you ended up doing something similar, just a bit less straightforward way :P

I don't see where it says anything about .replace being forbidden, though. Seems perfectly fine to me.

Probably.

You can write your own tests. When this kata was created, it was not unusual you had to.

Fixed. Thanks for reporting.

Hello everyone

Thanks devnuhl for pointing this out. I'm not sure about the issue you're having as I checked test cases and can't find an example which expects a four character word to be all caps. If you can remember the example it'd be great if you can share.

I can understand why characters/letters are confusing. I've updated the description and added some examples, hope this is clearer?

Ich habe die Kata einfach genau nach der Beschreibung gelöst und bin dabei auch auf keinen Fehler gestoßen.

No, the submission tests expects "It's" would become "t's".
So, I don't see, where is the problem...

I unterstood characters as char. And so "It's" are four characters and there is not problem.

Concrete example?
I think the tests work fine.