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.

[Q]: QuMNYgXJKXvbSqRhUHAfsIAxqUYb
[A]: QuMNYgXJKvbSqRhUHAfsIx


[Q]: FGhwvvBGIRusWiqUytlwJNHjLDB
[A]: FGhwvBIRusWiqUytlJNHjLD


[Q]: nnwHcphCQVDGXSZLhoodXFVgJioCfp
[A]:
nwHcphCQVDGXSZLodFgJif