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:
ILvmKIZpqZdtVJZXTtayEzfrLpFew

Ex Output:
ILvmKZpqdtVJXTayEzfrFew


Ex Input:
vbzTYPGtcLOutwmpcLPOyjppQI

Ex Output:
vbzTYPGtcLOuwmpyjQI


Ex Input:
WnEarWPNhRyvtQbwSubBUVr

Ex Output:

WnEarPNhRyvtQbwSuBUV


