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.

Ex Input:
YwnzIkrLPMPeTtXqyMqRYg

Ex Output:
YwnzIkrLPMeTtXqyRg


Ex Input:
EpmhbcqBTOnKFvPKTORfDMqS

Ex Output:
EpmhbcqBTOnKFvPRfDMS


Ex Input:
BylChsRazsjoFZukMekLPLvBZN

Ex Output:

BylChsRazjoFZukMeLPvN