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: PyZbsZSaDcLOZOMDqVfMKRMllF

A: PyZbsSaDcLOMqVfKRlF
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Q: MVSgVVGyEUoNRFFkrTkrgLcYYSPPAX

A: MVSgGyEUoNRFkrTLcYPAX
****
Q: czewqqMLGCBKQLVGDtng

A:
czewqMLGCBKQVDtng
****