Creating a complete scheduling system involves multiple components, including data storage, conflict detection and resolution algorithms, and support for preferences. 
What is the program?
class Course:
 def __init__(self, course_id, course_name, instructor, capacity):
 self.course_id = course_id
 self.course_name = course_name
 self.instructor = instructor
 self.capacity = capacity
class Student:
 def __init__(self, student_id, student_name, preferences):
 self.student_id = student_id
 self.student_name = student_name
 self.preferences = preferences
class Instructor:
 def __init__(self, instructor_id, instructor_name, preferences):
 self.instructor_id = instructor_id
 self.instructor_name = instructor_name
 self.preferences = preferences
class Venue:
 def __init__(self, venue_id, venue_name, capacity):
 self.venue_id = venue_id
 self.venue_name = venue_name
 self.capacity = capacity
 return timetable
def main():