code: 
  '''simple docstring'''
  import random
  import sys
  
  lowercase__						=			"""ABCDEFGHIJKLMNOPQRSTUVWXYZ"""
  
  
  
  
  def       _UpperCamelCase	(					)     ->       None:
  
  
  		'''simple docstring'''
  
  
  		snake_case     :					Optional[Any]     =	input('''Enter message: ''' )
  		snake_case     :					Union[str, Any]     =	"""LFWOAYUISVKMNXPBDCRJTQEGHZ"""
  		snake_case     :					Any     =	input('''Encrypt/Decrypt [e/d]: ''' )
  
  		check_valid_key(__lowerCamelCase )
  
  		if resp.lower().startswith('''e''' ):
  				snake_case     :					Union[str, Any]     =	"""encrypt"""
  				snake_case     :					Union[str, Any]     =	encrypt_message(__lowerCamelCase   ,					__lowerCamelCase )
  		elif resp.lower().startswith('''d''' ):
  				snake_case     :					Optional[int]     =	"""decrypt"""
  				snake_case     :					Optional[int]     =	decrypt_message(__lowerCamelCase   ,					__lowerCamelCase )
  
  		print(F'\n{mode.title()}ion: \n{translated}' )
  
  
  
  
  def       _UpperCamelCase	(					SCREAMING_SNAKE_CASE__ )     ->       None:
  
  
  		'''simple docstring'''
  
  
  		snake_case     :					List[str]     =	list(__lowerCamelCase )
  		snake_case     :					Optional[Any]     =	list(__lowerCamelCase )
  		key_list.sort()
  		letters_list.sort()
  
  		if key_list != letters_list:
  				sys.exit('''Error in the key or symbol set.''' )
  
  
  
  
  def       _UpperCamelCase	(					SCREAMING_SNAKE_CASE__   ,					SCREAMING_SNAKE_CASE__ )     ->       str:
  
  
  		'''simple docstring'''
  
  
  		return translate_message(__lowerCamelCase   ,					__lowerCamelCase   ,					'''encrypt''' )
  
  
  
  
  def       _UpperCamelCase	(					SCREAMING_SNAKE_CASE__   ,					SCREAMING_SNAKE_CASE__ )     ->       str:
  
  
  		'''simple docstring'''
  
  
  		return translate_message(__lowerCamelCase   ,					__lowerCamelCase   ,					'''decrypt''' )
  
  
  
  
  def       _UpperCamelCase	(					SCREAMING_SNAKE_CASE__   ,					SCREAMING_SNAKE_CASE__   ,					SCREAMING_SNAKE_CASE__ )     ->       str:
  
  
  		'''simple docstring'''
  
  
  		snake_case     :					Optional[int]     =	""""""
  		snake_case     :					str     =	LETTERS
  		snake_case     :					List[str]     =	key
  
  		if mode == "decrypt":
  				snake_case     :					Any     =	chars_b, chars_a
  
  		for symbol in message:
  				if symbol.upper() in chars_a:
  						snake_case     :					List[str]     =	chars_a.find(symbol.upper() )
  						if symbol.isupper():
  								translated += chars_b[sym_index].upper()
  						else:
  								translated += chars_b[sym_index].lower()
  				else:
  						translated += symbol
  
  		return translated
  
  
  
  
  def       _UpperCamelCase	(					)     ->       str:
  
  
  		'''simple docstring'''
  
  
  		snake_case     :					Optional[int]     =	list(__lowerCamelCase )
  		random.shuffle(__lowerCamelCase )
  		return "".join(__lowerCamelCase )
  
  
  if __name__ == "__main__":
  					main()
  
  
  
style_context: 
  '''simple docstring'''
  def       _UpperCamelCase	(					SCREAMING_SNAKE_CASE__   ,					SCREAMING_SNAKE_CASE__ )     ->       int:
  
  
  		'''simple docstring'''
  
  
  		snake_case     :					Optional[Any]     =	0
  		for ele in arr:
  				total_sum += product_sum(SCREAMING_SNAKE_CASE__   ,					depth + 1 ) if isinstance(SCREAMING_SNAKE_CASE__   ,					SCREAMING_SNAKE_CASE__ ) else ele
  		return total_sum * depth
  
  
  
  
  def       _UpperCamelCase	(					SCREAMING_SNAKE_CASE__ )     ->       int:
  
  
  		'''simple docstring'''
  
  
  		return product_sum(SCREAMING_SNAKE_CASE__   ,					1 )
  
  
  if __name__ == "__main__":
  						import doctest
  
  						doctest.testmod()
  
  
  