input: Write a python function to set and get the date using the Date class.
  assert d.get_date() == (0, 0, 0)
  d.set_date(25, 12, 2023)
  assert d.get_date() == (25, 12, 2023)
  d.set_date(1, 1, 2024)
  assert d.get_date() == (1, 1, 2024)
output: class Date:
      def __init__(self):
          self.day = 0
          self.month = 0
          self.year = 0
  
      def set_date(self, day, month, year):
          self.day = day
          self.month = month
          self.year = year
  
      def get_date(self):
          return (self.day, self.month, self.year)
  
  d = Date()