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: pRLRjmBQYxfuPuhnIiWinXvZknIW

Output: pRLjmBQYxfuPhnIiWXvZk


Input: Consider Input: ddoeHjaUVbJxtOpJywIOgn

Output: doeHjaUVbJxtOpywIgn


Input: Consider Input: hwHEeswGPwIHXoGqSbWQX


Output: hwHEesGPIXoqSbWQ