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: sHxKxkFrEYIoIHwnLijBD

A: sHxKkFrEYIownLijBD
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Q: jTtiXbIMwnwpdnRZBIQGtqgVGAI

A: jTtiXbIMwnpdRZBQGqgVA
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Q: YoJYejBwcUKVbOsBpadYe

A:
YoJejBwcUKVbOspad
****