code: 
  
  
  from typing import Literal
  
  __a   				=      '''ABCDEFGHIJKLMNOPQRSTUVWXYZ'''
  
  
  
  
  def 			__lowercase	(						_UpperCamelCase,    _UpperCamelCase,    _UpperCamelCase     )    ->str:
  
  
  
  
  
  
  
        """simple docstring"""
  
        lowercase			:   List[str]					   =		LETTERS if mode == '''decrypt''' else key
        lowercase			:   int					   =		key if mode == '''decrypt''' else LETTERS
        lowercase			:   Dict					   =		''''''
        # loop through each symbol in the message
        for symbol in message:
              if symbol.upper() in chars_a:
                    # encrypt/decrypt the symbol
                    lowercase			:   Optional[int]					   =		chars_a.find(symbol.upper()     )
                    if symbol.isupper():
                          translated += chars_b[sym_index].upper()
                    else:
                          translated += chars_b[sym_index].lower()
              else:
                    # symbol is not in LETTERS, just add it
                    translated += symbol
        return translated
  
  
  
  
  def 			__lowercase	(						_UpperCamelCase,    _UpperCamelCase     )    ->str:
  
  
  
  
  
  
  
        """simple docstring"""
  
        return translate_message(_UpperCamelCase,    _UpperCamelCase,    '''encrypt'''     )
  
  
  
  
  def 			__lowercase	(						_UpperCamelCase,    _UpperCamelCase     )    ->str:
  
  
  
  
  
  
  
        """simple docstring"""
  
        return translate_message(_UpperCamelCase,    _UpperCamelCase,    '''decrypt'''     )
  
  
  
  
  def 			__lowercase	(						)    ->None:
  
  
  
  
  
  
  
        """simple docstring"""
  
        lowercase			:   Tuple					   =		'''Hello World'''
        lowercase			:   Optional[int]					   =		'''QWERTYUIOPASDFGHJKLZXCVBNM'''
        lowercase			:   Any					   =		'''decrypt'''  # set to 'encrypt' or 'decrypt'
  
        if mode == "encrypt":
              lowercase			:   Optional[int]					   =		encrypt_message(_UpperCamelCase,    _UpperCamelCase     )
        elif mode == "decrypt":
              lowercase			:   List[str]					   =		decrypt_message(_UpperCamelCase,    _UpperCamelCase     )
        print(f"""Using the key {key}, the {mode}ed message is: {translated}"""     )
  
  
  if __name__ == "__main__":
    import doctest
  
    doctest.testmod()
    main()
  
  
style_context: 
  
  
  from typing import TYPE_CHECKING
  
  from ...utils import OptionalDependencyNotAvailable, _LazyModule, is_tokenizers_available, is_torch_available
  
  
  __a   				=      {'''configuration_yoso''': ['''YOSO_PRETRAINED_CONFIG_ARCHIVE_MAP''', '''YosoConfig''']}
  
  try:
    if not is_torch_available():
      raise OptionalDependencyNotAvailable()
  except OptionalDependencyNotAvailable:
    pass
  else:
    __a   				=      [
        '''YOSO_PRETRAINED_MODEL_ARCHIVE_LIST''',
        '''YosoForMaskedLM''',
        '''YosoForMultipleChoice''',
        '''YosoForQuestionAnswering''',
        '''YosoForSequenceClassification''',
        '''YosoForTokenClassification''',
        '''YosoLayer''',
        '''YosoModel''',
        '''YosoPreTrainedModel''',
    ]
  
  
  if TYPE_CHECKING:
    from .configuration_yoso import YOSO_PRETRAINED_CONFIG_ARCHIVE_MAP, YosoConfig
  
    try:
      if not is_torch_available():
        raise OptionalDependencyNotAvailable()
    except OptionalDependencyNotAvailable:
      pass
    else:
      from .modeling_yoso import (
          YOSO_PRETRAINED_MODEL_ARCHIVE_LIST,
          YosoForMaskedLM,
          YosoForMultipleChoice,
          YosoForQuestionAnswering,
          YosoForSequenceClassification,
          YosoForTokenClassification,
          YosoLayer,
          YosoModel,
          YosoPreTrainedModel,
      )
  
  
  else:
    import sys
  
    __a   				=      _LazyModule(__name__, globals()['''__file__'''], _import_structure)
  
  