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: PWCZyDfWSclWzumLWJJIFSxDMUGR

A: PWCZyDfSclzumLJIFxMUGR
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Q: QyYdHTVupfGnwJLOYhBhifYIjPSd

A: QyYdHTVupfGnwJLOhBiIjPS
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Q: jSaIWbdMCplOzSWMyxtOHQDc

A:
jSaIWbdMCplOzyxtHQDc
****