input: 
  class SongMatchesCriteria:
      """A class that matches the following criteria:
      - It has two instance variables: title and artist.
      - It includes three methods: str(), eq(), and length().
      - The str method returns a formatted string with title and artist.
      - The eq method checks if two Song instances are equal based on title and artist.
      - The length method returns the length of the title.
      Example:
      For SongMatchesCriteria("Lose Yourself", "Eminem").__str__() == 'Title: Lose Yourself\nArtist: Eminem'
      For SongMatchesCriteria("Yellow", "Coldplay") == SongMatchesCriteria("Yellow", "Coldplay")
      For SongMatchesCriteria("Bohemian Rhapsody", "Queen").length() == 17
      """
      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)
  
output:     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)