I need some help with the No Numerals challenge. Failing 1 test case

Question

I'm not sure what's wrong with the code. The test case it's failing is hidden: https://code.sololearn.com/c82wMVuVBhG9/?ref=app

Answer 1

I give you a hint:

Run your code with the input '10'

Answer 2

Create a dictionary mapping numbers 0-10 to its words form.
And the. use string replace method to change the value of index matching to that of dictionary

Answer 3

Thank you. I see the problem now.

Answer 4

I've now solved it. Thanks for the replies guys
I used a tuple to define the numbers as words. I iterated through it backwards to deal with 10 first.
I think the code is quite elegant now.