Input() not working

Hello, I can't get something as simple as input() to work.

PyCharm just keeps running the process and nothing happens:
(after I manually stop it, it does say exit code-1 so i guess that says something is wrong)

When I try to print something like print("Hello world"), the program works just fine.

I am just a noob and I don't understand this at all.

Actually I am very frustrated because I had SublimeText installed and it turned out there was no native support for input() which is absolutely ridiculous. And I am having more bad luck with Pycharm.

This is an example where I need a simple operation like input. : 

https://www.practicepython.org/exercise/2014/01/29/01-character-input.html