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:
hyRBumMJLvVnUJCVvrXaNEaR
answer:
hyRBumMJLvVnUCrXaNE


question:
WGyByIKOYGJMmrivJfkzNGq
answer:
WGyBIKOYJMmrivfkzNq


question:
QmMvWNLmtqJPwqlAVTiTO
answer:

QmMvWNLtqJPwlAVTiO