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: pKZWKxZqQdaAHUrMTJMYiZhu

SOLUTION: pKZWxqQdaAHUrMTJYihu

PROBLEM: huZGjSZbzraOBIBjsbJmLZ

SOLUTION: huZGjSbzraOBIsJmL

PROBLEM: XvvFtcaSyJPwQyoifYBdQcxGECNG

SOLUTION:
XvFtcaSyJPwQoifYBdxGECN

