In this task, you are given a string of characters. You need to remove duplicate characters from the string if any, and return the resulting string.

[Q]: dNrnbueSGYhdKguSDTykRjSwVY
[A]: dNrnbueSGYhKgDTykRjwV


[Q]: NOXIdIppfrgUFWCgdPvNqsZOjPxB
[A]: NOXIdpfrgUFWCPvqsZjxB


[Q]: rvPlbIWYNYtLvgfjGXBaCgeir
[A]:
rvPlbIWYNtLgfjGXBaCei