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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 group(requestContext, *seriesLists):
 """ Takes an arbitrary number of seriesLists and adds them to a single seriesList. This is used to pass multiple seriesLists to a function which only takes one. """

    seriesGroup = []
    for s in seriesLists:
        seriesGroup.extend(s)

    return seriesGroup