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]: wtLRluXeJyHKfexhMHsSElGIQk
[A]: wtLRluXeJyHKfxhMsSEGIQk


[Q]: wghwXLflnbkSbtCbFosA
[A]: wghXLflnbkStCFosA


[Q]: wtLRluXeJyHKfexhMHsSElGIQk
[A]:
wtLRluXeJyHKfxhMsSEGIQk