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 Input: Mexico
Example Output: .mx

Example Input: Japan
Example Output: .jp

Example Input: Nauru
Example Output:
.nr