Why my isogram code is not accepted by the challenge??

Question

https://code.sololearn.com/cH32SIIWZB8S/?ref=app

Answer 1

Read the task requirement again, we're supposed to take a string input; before checking whether it was an isogram. Your code isn't reading an input nor does it use the function to decide what output to print on screen.

Mind the output letter case, must match the requirement ...

Answer 2

You need to _call_ the function after defining it.

Answer 3

What is the challenge?