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: UjLmtcNFWOcqWdjClGGYxdbR

A: UjLmtcNFWOqdClGYxbR
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Q: hyRBumMJLvVnUJCVvrXaNEaR

A: hyRBumMJLvVnUCrXaNE
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Q: vZkZGttDlRuvwPzFhbTCsxSMzjWKI

A:
vZkGtDlRuwPzFhbTCsxSMjWKI
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