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]: hwuafkzTfllMQgESKLgjUY
[A]: hwuafkzTlMQgESKLjUY


[Q]: pRLRjmBQYxfuPuhnIiWinXvZknIW
[A]: pRLjmBQYxfuPhnIiWXvZk


[Q]: JvXQnblMcEKoPDpzkWUyQTcSluBpj
[A]:
JvXQnblMcEKoPDpzkWUyTSuBj