I feel like this should be the top solution.
This is my first debugging challenge, so maybe that's the reason why the top solution is not this one?

any source?

You could also try the filter method or recursion to solve this :)

yeah, i thought about regex before anything, than i tried the for loop.

It's also good to expand on your knowledge and practice all methods of solving as well, regex being one of them even if they are slower :)

regex can be 87% slower than own implementation using for loop. shouldnt matter tho. gg