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: YwnzIkrLPMPeTtXqyMqRYg

SOLUTION: YwnzIkrLPMeTtXqyRg

PROBLEM: rBeRPfuOhSCAIkgalGBywtdRPxi

SOLUTION: rBeRPfuOhSCAIkgalGywtdxi

PROBLEM: XjHovUMsMKxtlCYBiKWdCbVZeRacO

SOLUTION:
XjHovUMsKxtlCYBiWdbVZeRacO