Teacher: 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.
Teacher: Now, understand the problem? If you are still confused, see the following example:
abCCdDDgGGhi
Solution: abCdDgGhi
Reason: The input string has 3 duplicate characters and the resulting output string has no duplicate characters.

Now, solve this instance: amQgfjdWMTNAzeqGuzUDtPKlZCKwkr
Student:
amQgfjdWMTNAzeqGuUDtPKlZCwkr