Solved 4. Write a Python function that takes a string s, | Chegg.com
Python String Format: What's the Difference Between %s and %d? | Udacity
python tutorial - Python String Format | String Formatting in Python using % - By Microsoft Award MVP - learn python - python programming - Learn in 30sec | wikitechy
Learn to Format String, Int, Float, List and Dict in Python
Python: Find the middle character(s) of a given string - w3resource
Formatting strings and numbers in python | by Lars Nielsen | Towards Data Science