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: EJBeIJMJeQDbzsfHyboQYmMTwAymEy
Example Output: EJBeIMQDbzsfHyoYmTwA

Example Input: wghwXLflnbkSbtCbFosA
Example Output: wghXLflnbkStCFosA

Example Input: wrSaiSqvLVWTonDdYQMRvQVZajrYEw
Example Output:
wrSaiqvLVWTonDdYQMRZjE