instruction:
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.
question:
MVSgVVGyEUoNRFFkrTkrgLcYYSPPAX
answer:
MVSgGyEUoNRFkrTLcYPAX


question:
kjynMHqaVPzfJDTnXNHz
answer:
kjynMHqaVPzfJDTXN


question:
PyZbsZSaDcLOZOMDqVfMKRMllF
answer:

PyZbsSaDcLOMqVfKRlF