instruction:
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.
question:
EJBeIJMJeQDbzsfHyboQYmMTwAymEy
answer:
EJBeIMQDbzsfHyoYmTwA


question:
UdsGvNQzdrCqOThbXfoAomAJflSPec
answer:
UdsGvNQzrCqOThbXfoAmJlSPec


question:
CfmnulCVWZeALbyeFhhMplKwLlUb
answer:

CfmnulVWZeALbyFhMpKwU