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:
PWCZyDfWSclWzumLWJJIFSxDMUGR
answer:
PWCZyDfSclzumLJIFxMUGR


question:
FGhwvvBGIRusWiqUytlwJNHjLDB
answer:
FGhwvBIRusWiqUytlJNHjLD


question:
YBzIMCsiNvbQNvaPVdtGtoPNQ
answer:

YBzIMCsiNvbQaPVdtGo