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:
eksaXqtqakDKItGxlBzabZa

Ex Output:
eksaXqtDKIGxlBzbZ


Ex Input:
PLjJDIORjmnkxLEVzasB

Ex Output:
PLjJDIORmnkxEVzasB


Ex Input:
jSaIWbdMCplOzSWMyxtOHQDc

Ex Output:

jSaIWbdMCplOzyxtHQDc