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: HuYHfZxsdwtzapmLmmFunDczqY

A: HuYfZxsdwtzapmLFnDcq
****
Q: PLjJDIORjmnkxLEVzasB

A: PLjJDIORmnkxEVzasB
****
Q: OdINdUfcsEAYNFxAwLmjqtPwef

A:
OdINUfcsEAYFxwLmjqtPe
****