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]: vpNNpsyAnsFJkHvrjgSkTOhHXIC
[A]: vpNsyAnFJkHrjgSTOhXIC


[Q]: PWCZyDfWSclWzumLWJJIFSxDMUGR
[A]: PWCZyDfSclzumLJIFxMUGR


[Q]: GMkOsldECAvHBcLCmJolGLePMVe
[A]:
GMkOsldECAvHBcLmJoePV