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.
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Question: ktWYQIoDdqxfApnOvFWSAhj

Answer: ktWYQIoDdqxfApnOvFShj


Question: gIbVlYsnmQJkeQqsrmuup

Answer: gIbVlYsnmQJkeqrup


Question: DWGwMXvmvHOwEgAzUgTuscqISGld

Answer:
DWGwMXvmHOEgAzUTuscqISld