input: Write a python function to create a set containing the names of the days of the week and print it.
  assert create_days_of_the_week() == {'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'}
output: def create_days_of_the_week():
      days_of_the_week = {'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday', 'Sunday'}
      return days_of_the_week