def get_basic_number_rows():
    """Returns two lists, one of the 'top' row and one of the 'bottom' row of numbers.

    'The tiles are arranged into two groups: four "large numbers" (25, 50, 75 and 100)
    (12, 37, 62, 87 in some special episodes) and the remainder "small numbers",
    which comprise two each of the numbers 1 to 10.'
    https://en.wikipedia.org/wiki/Countdown_(game_show)#Numbers_round
    """
    top_row = [25, 50, 75, 100]
    bottom_row = []
    for i in range(1, 11):
        bottom_row.append(i)
        bottom_row.append(i)
    return top_row, bottom_row
