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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def find_duplicates(l: list) -> set: """ Return the duplicates in a list. The function relies on https://stackoverflow.com/questions/9835762/find-and-list-duplicates-in-a-list . Parameters l : list Name Returns ------- set Duplicated values set() {1} """

    return set([x for x in l if l.count(x) > 1])