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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 unique_preserved_list(original_list):
 """ Return the unique items of a list in their original order. :param original_list: A list of items that may have duplicate entries. :type original_list: list :returns: A list with unique entries with the original order preserved. :rtype: list """

    
    seen = set()
    seen_add = seen.add
    return [x for x in original_list if x not in seen and not seen_add(x)]