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]: YWHyyWnPwmhBFJTLgavox
[A]: YWHynPwmhBFJTLgavox


[Q]: ngGDcYbncvLyDvYspBnpiSDhWKg
[A]: ngGDcYbvLyspBiShWK


[Q]: WGyByIKOYGJMmrivJfkzNGq
[A]:
WGyBIKOYJMmrivfkzNq