input: def find_emails(text: str) -> List[str]:
      """Extract all email addresses from a given string.
      >>> find_emails("This is an example with two emails: john@example.com, and jane@example.com")
      ['john@example.com', 'jane@example.com']
      """
output:     import re
      pattern = r'\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b'
      return re.findall(pattern, text)