But you're only importing, right? I mean, you aren't returning anything nor receiving the arguments... Can you explain bit more, please?

variable names can be improved a bit. well done.

contains is the function for "in" operator. When we import it as "include", that does the trick.

how does this even work?

One-line solutions are practical most of the time but this one example where they aren't. Although its efficiency may have passed the tests, you have to stare at the code at least a minute in order to understand what is going on.

so politely

The voices of friends have been removed, now they do not affect the kata rating

Tests have been corrected, random tests have also been added

Great, then we can look forward to more of your kata's. This one has been put back to draft, you should fix the issues and republish to make it accessible again for users.

I get what you mean. From now on, we will not do this, and I will wait for the end of beta testing before showing kata to my friends. This is my first kata and I am not familiar with all the subtleties of the codewars rules

Because you said you made it together .. and the solution of your friend was submitted so quickly after you posted this kata, he might already knew the answer in advance anyway (in case he didn't make it together with you). Just use some common sense, friends that weren't involved in creating this kata could vote, others should wait till after beta.

This is my first kata, I will take this into account in my next kata. Thanks for the feedback!

No random tests, the range for input right now is meaningless...

Okay, I get you. But why can't my friend deliver a good voice if he really liked kata?

The "cheat" lies in upvoting your own kata (all of you) in the beta process. As said earlier by a mod, don't influence the beta process like this.