In this task, you are given a country name and you need to return the Top Level Domain (TLD) of the given country. The TLD is the part that follows immediately after the "dot" symbol in a website's address. The output, TLD is represented by a ".", followed by the domain.
Example: Andorra
Example solution: .ad
Example explanation: .ad is the TLD of the country called Andorra.

Problem: Greece

Solution: .gr