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.
--------
Question: FGhwvvBGIRusWiqUytlwJNHjLDB

Answer: FGhwvBIRusWiqUytlJNHjLD


Question: pKZWKxZqQdaAHUrMTJMYiZhu

Answer: pKZWxqQdaAHUrMTJYihu


Question: vpNNpsyAnsFJkHvrjgSkTOhHXIC

Answer:
vpNsyAnFJkHrjgSTOhXIC