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:
PxUaJWAyOQWYxYpOHuccQUtHoJOV
answer:
PxUaJWAyOQYpHuctoV


question:
gjroYPFlHUuyuFQeDOEpoLOWKZ
answer:
gjroYPFlHUuyQeDOEpLWKZ


question:
PxUaJWAyOQWYxYpOHuccQUtHoJOV
answer:

PxUaJWAyOQYpHuctoV