if-elif-else coding help

[esyfilamaj]

My apologies, I was actually replying with my phone and so could not use python tags.
The colon at the end of the if statement was the issue I was having (I did have if in lowercase in the actual program). Also, the quotations seem to be working okay as well.

In part c, how do I show that he str only has alphabetical characters and
in part d.i. where does myint come from? How do I include this into the program?

(I am a beginner in Python)