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**Question:** Write a function called `find_unique_characters` that takes a string as input and returns a new string containing the unique characters from the input string. Use sets to find the unique characters. **Example:** Input: "hello" Output: "helo"
def find_unique_characters(string): """ Finds the unique characters in a given string. Args: string (str): The input string. Returns: str: A new string with the unique characters. """ # TODO: Implement the find_unique_characters function pass