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:
xUjcowAqalitkJpylEen

Ex Output:
xUjcowAqalitkJpyEen


Ex Input:
XvvFtcaSyJPwQyoifYBdQcxGECNG

Ex Output:
XvFtcaSyJPwQoifYBdxGECN


Ex Input:
ikHaLEAdQxTpeFsdinttvMaceN

Ex Output:

ikHaLEAdQxTpeFsntvMcN