the_line = fil.readline()
        yield the_line

        next_line = fil.readline().strip()
        if next_line != '':
            # yield int(next_line)
            yield next_line
        the_line = next_line

        # print("pushing: ", the_line, end='')

        # print("pushing: ", the_line)

            # print("buffer_before: ", repr(the_buffer))

    for line in sorter(file_iter(sys.stdin), 10):
        print(line, end='')

    for line in sorter(file_iter(sys.stdin), int(sys.argv[1])):
        print(line)