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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 create_top_level_index_entry(title, max_depth, subtitles):
 """Function for creating a text entry in index.rst for its content. :param title : Title for the content. :type title: str :param max_depth : Value for max_depth in the top level index content. :type max_depth: int :param subtitles : list of subtitles that is available. :type subtitles: list :return: A text for the content of top level index. :rtype: str """


    return_text = title + '\n'
    dash = '-' * len(title) + '\n'

    return_text += dash + '\n'
    return_text += '.. toctree::' + '\n'
    return_text += '   :maxdepth: ' + str(max_depth) + '\n\n'

    for subtitle in subtitles:
        return_text += '   ' + subtitle + '\n\n'
    return return_text