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.

Q: xpgVQicCOzavYkEiLbejlmU

A: xpgVQicCOzavYkELbejlmU
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Q: yIHZfTLvRxeCpFyKpaaUvvjWk

A: yIHZfTLvRxeCpFKaUjWk
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Q: UdsGvNQzdrCqOThbXfoAomAJflSPec

A:
UdsGvNQzrCqOThbXfoAmJlSPec
****