TASK DEFINITION: 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.
PROBLEM: YMkiCvKjOpMYXaxHMGTZppIBGmpB

SOLUTION: YMkiCvKjOpXaxHGTZIBm

PROBLEM: FGhwvvBGIRusWiqUytlwJNHjLDB

SOLUTION: FGhwvBIRusWiqUytlJNHjLD

PROBLEM: ILvmKIZpqZdtVJZXTtayEzfrLpFew

SOLUTION:
ILvmKZpqdtVJXTayEzfrFew