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: ppVOlyLEPBhxIPhMqZGRzdvfVvH

SOLUTION: pVOlyLEPBhxIMqZGRzdvfH

PROBLEM: YqrgFKzesbCXcEVMhcxZwdanPFR

SOLUTION: YqrgFKzesbCXcEVMhxZwdanPR

PROBLEM: eSfCVZsCDnsQYKZLJZknwVEUHre

SOLUTION:
eSfCVZsDnQYKLJkwEUHr

