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: RSIIYSRjhKYxdfDrFUukVHMOcYR

Answer: RSIYjhKxdfDrFUukVHMOc


Question: ErwHePmuudRDrIRMurbeqIV

Answer: ErwHePmudRDIMbqV


Question: dtwJlkEpgjUfBVBUvNlYwbEQVq

Answer:
dtwJlkEpgjUfBVvNYbQq