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.

Input: Consider Input: DlmAHZNmehvEvkQpzINROIAZ

Output: DlmAHZNehvEkQpzIRO


Input: Consider Input: AgGgzxvBjlCrysBmzQKfz

Output: AgGzxvBjlCrysmQKf


Input: Consider Input: amQgfjdWMTNAzeqGuzUDtPKlZCKwkr


Output: amQgfjdWMTNAzeqGuUDtPKlZCwkr


