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.

[Q]: VuQnzzRbtRnCSlENecvXCNiPGSAh
[A]: VuQnzRbtCSlENecvXiPGAh


[Q]: jahTEjtKeQFovsaqPtcjuJdRKkQL
[A]: jahTEtKeQFovsqPcuJdRkL


[Q]: BOPbKEiInAGqyixJWhkPkbCGMCxjj
[A]:
BOPbKEiInAGqyxJWhkCMj