Validate the domain

Given a webpage domain like or or, your task is to validate it. Make sure that the domain is actually written correctly. The rules of a domain name:
  • It can start with www. or it can have nothing in the beginning
  • It should have a name that only has Latin letters (like profound or google)
  • It should end with any of .com, .org, or .academy
The input contains a single string - the domain.
The program should print Valid in case the domain is valid and Invalid in case it isn’t.


Time limit: 2 seconds

Memory limit: 512 MB

Output limit: 1 MB

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