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.

Example input: abCCdDDgGGhi
Example output: abCdDgGhi
Example explanation: The input string has 3 duplicate characters and the resulting output string has no duplicate characters.
Q: czewqqMLGCBKQLVGDtng
A:
czewqMLGCBKQVDtng