TASK DEFINITION: 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.
PROBLEM: zadFNuqfDNJaQRTkfzYPDrlod

SOLUTION: zadFNuqfDJQRTkYPrlo

PROBLEM: uCgAmuuvjgNExaiRXxnvqSs

SOLUTION: uCgAmvjNExaiRXnqSs

PROBLEM: GEBuvBzKGuwclisbkNYgnObhpT

SOLUTION:
GEBuvzKwclisbkNYgnOhpT

