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: SIZayKTLqjQMnNpPLFVRhnPVyHXlxY

SOLUTION: SIZayKTLqjQMnNpPFVRhHXlxY

PROBLEM: iBHUXTOSUDFDFYvNfOBkPCAlvr

SOLUTION: iBHUXTOSDFYvNfkPCAlr

PROBLEM: otAOfRQAOUdHhTAHqSaDvPql

SOLUTION:
otAOfRQUdHhTqSaDvPl

