new_contents: from challenge import Challenge
  import flask
  
  class c11(Challenge):
      '''
      Challenge 11
      Win screen
      '''
  
      def __init__(self):
          super()
          self._id = '0aaeb7a4cf49f562b6c806f70f3aff98ecf6353c'
          self._hints = {}
  
      def get_response(self, app):
         return app.send_static_file('c11/index.html')
  
subject: Add contents of index.html for c11