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]: cJvCWyzChbEUpBEoGsRInWynanLZ
[A]: cJvCWyzhbEUpBoGsRInaLZ


[Q]: sFOaSQTXRZRCwzaBgYcgIi
[A]: sFOaSQTXRZCwzBgYcIi


[Q]: IVaFaBpctNpNNKUdFNuXUAvfZNlVKL
[A]:
IVaFBpctNKUduXAvfZlL