text: def letras():
      for i in range(ord('A'), ord('M')+1):
          yield (chr(i))
  
  if __name__ == '__main__':
  
          letra = letras()
          try:
              for i in range(ord('M')):
                  print(next(letra))
                  if i == 'M':
                          break
          except Exception as e:
              print(e)
  