input: def download_subtitles(releases, engines=[DEFAULTS['subtitle_engine']], lang=DEFAULTS['subtitle_language']):
      """
      The function downloads subtitles for given movie or TV show release paths using specified engines and language.
      It prints the status of the subtitle download for each release and engine combination.
      >>> download_subtitles(['path/to/movie1', 'path/to/movie2'], ['engine1'], 'en')
      """
output:     for release in releases:
          for engine in engines:
              print(f"Downloading subtitles for {release} using {engine} engine...")
              # Simulate the download process
              if engine == 'engine1':
                  print(f"Subtitles downloaded successfully for {release} using {engine} engine.")
              else:
                  print(f"Failed to download subtitles for {release} using {engine} engine.")