def combine_urls(base_dir, start_day=11, end_day=17, month=8):
    """ Allows to read all the chunks of files 
        holding the urls and combine them in one huge list
    """
    urls = []
    for day in range(start_day, end_day + 1):
        month_r = f'0{month}' if month < 10 else f'{month}'
        filename = f"{base_dir}/{day}-{month_r}"
        with open(filename) as file:
            urls += [line.replace('\n', '') for line in file.readlines()]
    return urls