Write a function, shut_down, that takes one parameter (you can use anything you like; in this case, we\'d use s for string).
shut_down
s
The shut_down func
You can do it a couple of ways:
if s == 'Yes' or s == 'yes' or s == 'YES': return "Shutting down..."
Or:
if s in ['Yes', 'yes', 'YES']: return "Shutting down..."