


'''simple docstring'''
__snake_case											=					'''ABCDEFGHIJKLMNOPQRSTUVWXYZ'''


def       a				(      )  ->     None:



     '''simple docstring'''






     UpperCamelCase__       :Optional[int]							 =			input('''Enter message: '''       )
     UpperCamelCase__       :int							 =			input('''Enter key [alphanumeric]: '''       )
     UpperCamelCase__       :str							 =			input('''Encrypt/Decrypt [e/d]: '''       )

     if mode.lower().startswith('''e'''       ):
          UpperCamelCase__       :Optional[Any]							 =			'''encrypt'''
          UpperCamelCase__       :Optional[Any]							 =			encrypt_message(__lowerCAmelCase			, __lowerCAmelCase       )
     elif mode.lower().startswith('''d'''       ):
          UpperCamelCase__       :Any							 =			'''decrypt'''
          UpperCamelCase__       :Optional[int]							 =			decrypt_message(__lowerCAmelCase			, __lowerCAmelCase       )

     print(f'''\n{mode.title()}ed message:'''       )
     print(__lowerCAmelCase       )


def       a				(      __a			, __a       )  ->     str:



     '''simple docstring'''






     return translate_message(__lowerCAmelCase			, __lowerCAmelCase			, '''encrypt'''       )


def       a				(      __a			, __a       )  ->     str:



     '''simple docstring'''






     return translate_message(__lowerCAmelCase			, __lowerCAmelCase			, '''decrypt'''       )


def       a				(      __a			, __a			, __a       )  ->     str:



     '''simple docstring'''






     UpperCamelCase__       :List[str]							 =			[]
     UpperCamelCase__       :Dict							 =			0
     UpperCamelCase__       :Optional[int]							 =			key.upper()

     for symbol in message:
          UpperCamelCase__       :List[Any]							 =			LETTERS.find(symbol.upper()       )
          if num != -1:
               if mode == "encrypt":
                    num += LETTERS.find(key[key_index]       )
               elif mode == "decrypt":
                    num -= LETTERS.find(key[key_index]       )

               num %= len(__lowerCAmelCase       )

               if symbol.isupper():
                    translated.append(LETTERS[num]       )
               elif symbol.islower():
                    translated.append(LETTERS[num].lower()       )

               key_index += 1
               if key_index == len(__lowerCAmelCase       ):
                    UpperCamelCase__       :Dict							 =			0
          else:
               translated.append(__lowerCAmelCase       )
     return "".join(__lowerCAmelCase       )


if __name__ == "__main__":
  main()



'''simple docstring'''
import socket


def       a				(      )  ->     Dict:



					'''simple docstring'''






					UpperCamelCase__       :int							 =			socket.socket(socket.AF_INET			, socket.SOCK_STREAM       )
					UpperCamelCase__       :List[Any]							 =			socket.gethostname()
					UpperCamelCase__       :List[str]							 =			12312

					sock.connect((host, port)       )
					sock.send(B'''Hello server!'''       )

					with open('''Received_file'''			, '''wb'''       ) as out_file:
										print('''File opened'''       )
										print('''Receiving data...'''       )
										while True:
															UpperCamelCase__       :str							 =			sock.recv(1024       )
															if not data:
																				break
															out_file.write(__a       )

					print('''Successfully received the file'''       )
					sock.close()
					print('''Connection closed'''       )


if __name__ == "__main__":
		main()