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: vqjyphcluSVsBtlQGXUvzwFBa

SOLUTION: vqjyphcluSVsBtQGXUzwFa

PROBLEM: tOjAVemnYuDKuvgyhlOuFwxJb

SOLUTION: tOjAVemnYuDKvgyhlFwxJb

PROBLEM: ZzWpHFjYXBNRQsGiHbcqoyTqGdbe

SOLUTION:
ZzWpHFjYXBNRQsGibcqoyTde