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.

Input: Consider Input: RYYyNFyPsNoVoDJHTsxfrutaByXMYm

Output: RYyNFPsoVDJHTxfrutaBXMm


Input: Consider Input: FGhwvvBGIRusWiqUytlwJNHjLDB

Output: FGhwvBIRusWiqUytlJNHjLD


Input: Consider Input: polzijQWGdHBFBwSaTbcbghoVNTpgD


Output: polzijQWGdHBFwSaTbcghVND