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.

[EX Q]: Lithuania
[EX A]: .lt

[EX Q]: Denmark
[EX A]: .dk

[EX Q]: Luxembourg
[EX A]:
.lu