text: import sys
  
  
  def has_all_unique_chars(word):
      letters_map = {}
  
      for character in word:
          if character in letters_map:
              return False
          else:
              letters_map[character] = True
      return True
  
  
  if __name__ == '__main__':
      if len(sys.argv) != 2:
          print("Usage %s <word>" % sys.argv[0])
          sys.exit(1)
      print(has_all_unique_chars(sys.argv[1]))
  