def duration_seconds_to_string(seconds):
    """ Converts a total amount of seconds into a
        string representation of duration.

        >>>  duration_seconds_to_string(196)
        '00:03:16'
    """
    m, s = divmod(seconds, 60)
    h, m = divmod(m, 60)
    return f'{h}:{m:02}:{s:02}'
