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:
keihwVKbNVrcHMLJFiGunIpPdXN
answer:
keihwVKbNrcHMLJFGunIpPdX

question:
FGhwvvBGIRusWiqUytlwJNHjLDB
answer:
FGhwvBIRusWiqUytlJNHjLD

question:
YqrgFKzesbCXcEVMhcxZwdanPFR
answer:
YqrgFKzesbCXcEVMhxZwdanPR