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]: ErwHePmuudRDrIRMurbeqIV
[A]: ErwHePmudRDIMbqV


[Q]: AHlQzXpVOwzImnUxPwSG
[A]: AHlQzXpVOwImnUxPSG


[Q]: QFAWjYIbRIJWvLvKLmdNsW
[A]:
QFAWjYIbRJvLKmdNs


