input: 
  class Song:
      def __init__(self, title, artist):
          self.title = title
          self.artist = artist
    
      def __str__(self):
          return f'Title: {self.title}\nArtist: {self.artist}'
      
      def __eq__(self, other):
          return self.artist == other.artist and self.title == other.title
  
      def length(self):
          return len(self.title)
  
  # Test cases
  song1 = Song("Bohemian Rhapsody", "Queen")
  song2 = Song("Bohemian Rhapsody", "Queen")
  song3 = Song("Hotel California", "Eagles")
  
  print(str(song1))  # Output: Title: Bohemian Rhapsody
                     #         Artist: Queen
  print(song1 == song2)  # Output: True
  print(song1 == song3)  # Output: False
  print(song1.length())  # Output: 17
  
output:     def __lt__(self, other):
          return self.length() < other.length()
  
      def __gt__(self, other):
          return self.length() > other.length()
  
      def __le__(self, other):
          return self.length() <= other.length()
  
      def __ge__(self, other):
          return self.length() >= other.length()
  
  # Additional test cases
  print(song1 < song3)  # Output: False
  print(song1 > song3)  # Output: True
  print(song1 <= song3)  # Output: False
  print(song1 >= song3)  # Output: True