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:
rBeRPfuOhSCAIkgalGBywtdRPxi
answer:
rBeRPfuOhSCAIkgalGywtdxi


question:
CDcnHTHNKVZUuThezXQbxTX
answer:
CDcnHTNKVZUuhezXQbx


question:
iBHUXTOSUDFDFYvNfOBkPCAlvr
answer:

iBHUXTOSDFYvNfkPCAlr


