def expand_abbreviations(data):
    """ Exapand a flattened DefaultDict into a CSV-formatted list of lists
    """
    lines = []
    if data:
        for key in data.keys():
            line = [key]
            for col in data[key]:
                line.append(col)
            lines.append(line)
    if not lines:
        while len(lines) < 10:
            lines.append(['', '', '', '', '', ''])
    return lines
