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: dDRIaLRVpuDRmnrhCCysD

SOLUTION: dDRIaLVpumnrhCys

PROBLEM: vFRwzRsxhLqGSqvwxRkXiwetTLvzQ

SOLUTION: vFRwzsxhLqGSkXietTQ

PROBLEM: YoJYejBwcUKVbOsBpadYe

SOLUTION:
YoJejBwcUKVbOspad

