def get_url(year_of_study, session):
    """

    :param year_of_study: 1, 2, 3 or 4.
    :param session: Examples: 20199 is fall 2019. 20195 is summer 2019.
    :return:
    """

    return "https://student.utm.utoronto.ca/timetable/timetable?yos={0}&subjectarea=&session={1}&courseCode=&sname=&delivery=&courseTitle=".format(
        year_of_study, session)