text: # from abc import ABC, abstractmethod
  #
  #
  # class A(ABC):
  #     @abstractmethod
  #     def falar(self):
  #         pass
  #
  #
  # class B(A):
  #     def falar(self):
  #         print('falando... B...')
  #
  #
  # a = A()
  # a.falar()
  
  
  
  