You will be given a definition of a task first, then an example. Follow the example to solve a new instance of the task.
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.

abCCdDDgGGhi
Solution: abCdDgGhi
Why? The input string has 3 duplicate characters and the resulting output string has no duplicate characters.

New input: btxuUGwbmqGQQmnbzVxueefqReT
Solution:
btxuUGwmqQnzVefRT