thanks!

Make sure that you're testing the same thing, the thing that failed - otherwise there's no point to it. It's very common around here to say "works locally but not here" and from what I can tell it's almost always caused by not measuring the same thing, making the comparison meaningless.
If you're unable to reproduce it locally, then you can still debug it here where you can repreduce it.

why my solution is incorrect output but when i tried in my IDE and online IDE the output is correct?

Please read this: https://github.com/codewars/codewars.com/wiki/Troubleshooting-your-solution

I don´t know why, but for some reason my solution alway fails. When i compiled
it on my PC, i tried like a billion times (including empty strings) and
it worked perfectly ever single time. pls help