new_contents: import sys
  from typing import Optional, Union
  
  from ..interfaces.context import Context
  from ..interfaces.inputter import Inputter
  from ..interfaces.outputter import Outputter
  
  
  class StdinInputter(Inputter[str]):
      def read(self) -> Context[str]:
          return Context(sys.stdin.read())
  
  
  class StdoutOutputter(Outputter[Union[str, bytes]]):
      def write(
          self,
          value: Union[str, bytes],
          *,
          context: Optional[Context[Union[str, bytes]]] = None
      ) -> None:
          if isinstance(value, bytes):
              value = value.decode()
          sys.stdout.write(value)
  
subject: move StdinInputter and StdoutOutputter into stdio