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.

Input: Consider Input: xHCXluBTXtjlSLfosSmqok

Output: xHCXluBTtjSLfosmqk

Input: Consider Input: OdINdUfcsEAYNFxAwLmjqtPwef

Output: OdINUfcsEAYFxwLmjqtPe

Input: Consider Input: rvPlbIWYNYtLvgfjGXBaCgeir
Output: rvPlbIWYNtLgfjGXBaCei