What's wrong with the code in Code Coach "No numerals?"

Question

I got stuck at the below program. Please help me clarify the bugs.

https://code.sololearn.com/cM6kV827wDUC/?ref=app

Answer 1

Don't convert input to lower case..

Answer 2

I have passed all the Test Cases. Thank you very very much for the tip.

Answer 3

GiantJupiter you're welcome..