text: import requests
  import re
  
  
  def main():
      url = input()
      res = requests.get(url)
      if res.ok:
          match = re.findall('''(a.+href=['\"])(\w+://)?(\w+[\w.-]+)''',
                             res.text)
          sites = sorted(list(set([x[2] for x in match])))
          for site in sites:
              print(site)
  
  
  if __name__ == "__main__":
      main()
  