input: def html_to_text(html_string: str) -> str:
      """Converts given HTML string to plain text by removing all HTML tags.
      >>> html_to_text('<title>Sample HTML</title>')
      'Sample HTML'
      >>> html_to_text('A <bold>bold</bold> move.')
      'A bold move.'
      """
output:     import re
      return re.sub(r'<[^>]+>', '', html_string)