Test cases are failing

Did you try printing in the correct output format?

Oh its just that result+cc instead of cc+result in the recursion call. Check that

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.