

'''simple docstring'''







def 					_SCREAMING_SNAKE_CASE		(						snake_case_							,       snake_case_	):
	if not isinstance(__lowerCamelCase							,       __lowerCamelCase	):
		raise TypeError("""plaintext must be a string"""	)
	if not isinstance(__lowerCamelCase							,       __lowerCamelCase	):
		raise TypeError("""key must be a string"""	)

	if not plaintext:
		raise ValueError("""plaintext is empty"""	)
	if not key:
		raise ValueError("""key is empty"""	)

	key += plaintext
	_lowercase							=     plaintext.lower()
	_lowercase							=     key.lower()
	_lowercase							=     0
	_lowercase							=     0
	_lowercase							=     ""
	while plaintext_iterator < len(__lowerCamelCase	):
		if (
		    ord(plaintext[plaintext_iterator]	) < 97
		    or ord(plaintext[plaintext_iterator]	) > 122
		):
			ciphertext += plaintext[plaintext_iterator]
			plaintext_iterator += 1
		elif ord(key[key_iterator]	) < 97 or ord(key[key_iterator]	) > 122:
			key_iterator += 1
		else:
			ciphertext += chr(
			    (
			        (ord(plaintext[plaintext_iterator]	) - 97 + ord(key[key_iterator]	))
			        - 97
			    )
			    % 26
			    + 97	)
			key_iterator += 1
			plaintext_iterator += 1
	return ciphertext






def 					_SCREAMING_SNAKE_CASE		(						snake_case_							,       snake_case_	):
	if not isinstance(__lowerCamelCase							,       __lowerCamelCase	):
		raise TypeError("""ciphertext must be a string"""	)
	if not isinstance(__lowerCamelCase							,       __lowerCamelCase	):
		raise TypeError("""key must be a string"""	)

	if not ciphertext:
		raise ValueError("""ciphertext is empty"""	)
	if not key:
		raise ValueError("""key is empty"""	)

	_lowercase							=     key.lower()
	_lowercase							=     0
	_lowercase							=     0
	_lowercase							=     ""
	while ciphertext_iterator < len(__lowerCamelCase	):
		if (
		    ord(ciphertext[ciphertext_iterator]	) < 97
		    or ord(ciphertext[ciphertext_iterator]	) > 122
		):
			plaintext += ciphertext[ciphertext_iterator]
		else:
			plaintext += chr(
			    (ord(ciphertext[ciphertext_iterator]	) - ord(key[key_iterator]	)) % 26
			    + 97	)
			key += chr(
			    (ord(ciphertext[ciphertext_iterator]	) - ord(key[key_iterator]	)) % 26
			    + 97	)
			key_iterator += 1
		ciphertext_iterator += 1
	return plaintext


if __name__ == "__main__":
							import doctest

							doctest.testmod()
							_lowerCamelCase    =  int(input('Type 1 to encrypt or 2 to decrypt:'))
							if operation == 1:
														_lowerCamelCase    =  input('Typeplaintext to be encrypted:\n')
														_lowerCamelCase    =  input('Type the key:\n')
														print(encrypt(plaintext, key))
							elif operation == 2:
														_lowerCamelCase    =  input('Type the ciphertext to be decrypted:\n')
														_lowerCamelCase    =  input('Type the key:\n')
														print(decrypt(ciphertext, key))
							decrypt('jsqqs avvwo', 'coffee')






"""simple docstring"""





def       __a	(						__lowerCamelCase,						__lowerCamelCase    ):
   if not isinstance(__lowerCamelCase,						__lowerCamelCase    ):
      raise TypeError("plaintext must be a string"    )
   if not isinstance(__lowerCamelCase,						__lowerCamelCase    ):
      raise TypeError("key must be a string"    )

   if not plaintext:
      raise ValueError("plaintext is empty"    )
   if not key:
      raise ValueError("key is empty"    )

   key += plaintext
   UpperCAmelCase_   :   Optional[int]     	=       plaintext.lower()
   UpperCAmelCase_   :   Any     	=       key.lower()
   UpperCAmelCase_   :   Optional[int]     	=       0
   UpperCAmelCase_   :   List[str]     	=       0
   UpperCAmelCase_   :   Optional[int]     	=       ""
   while plaintext_iterator < len(__lowerCamelCase    ):
      if (
          ord(plaintext[plaintext_iterator]    ) < 97
          or ord(plaintext[plaintext_iterator]    ) > 122
      ):
         ciphertext += plaintext[plaintext_iterator]
         plaintext_iterator += 1
      elif ord(key[key_iterator]    ) < 97 or ord(key[key_iterator]    ) > 122:
         key_iterator += 1
      else:
         ciphertext += chr(
             (
                 (ord(plaintext[plaintext_iterator]    ) - 97 + ord(key[key_iterator]    ))
                 - 97
             )
             % 26
             + 97    )
         key_iterator += 1
         plaintext_iterator += 1
   return ciphertext







def       __a	(						__lowerCamelCase,						__lowerCamelCase    ):
   if not isinstance(__lowerCamelCase,						__lowerCamelCase    ):
      raise TypeError("ciphertext must be a string"    )
   if not isinstance(__lowerCamelCase,						__lowerCamelCase    ):
      raise TypeError("key must be a string"    )

   if not ciphertext:
      raise ValueError("ciphertext is empty"    )
   if not key:
      raise ValueError("key is empty"    )

   UpperCAmelCase_   :   List[str]     	=       key.lower()
   UpperCAmelCase_   :   Tuple     	=       0
   UpperCAmelCase_   :   Optional[int]     	=       0
   UpperCAmelCase_   :   Dict     	=       ""
   while ciphertext_iterator < len(__lowerCamelCase    ):
      if (
          ord(ciphertext[ciphertext_iterator]    ) < 97
          or ord(ciphertext[ciphertext_iterator]    ) > 122
      ):
         plaintext += ciphertext[ciphertext_iterator]
      else:
         plaintext += chr(
             (ord(ciphertext[ciphertext_iterator]    ) - ord(key[key_iterator]    )) % 26
             + 97    )
         key += chr(
             (ord(ciphertext[ciphertext_iterator]    ) - ord(key[key_iterator]    )) % 26
             + 97    )
         key_iterator += 1
      ciphertext_iterator += 1
   return plaintext


if __name__ == "__main__":
    import doctest

    doctest.testmod()
    _a									=				int(input('Type 1 to encrypt or 2 to decrypt:'))
    if operation == 1:
        _a									=				input('Typeplaintext to be encrypted:\n')
        _a									=				input('Type the key:\n')
        print(encrypt(plaintext, key))
    elif operation == 2:
        _a									=				input('Type the ciphertext to be decrypted:\n')
        _a									=				input('Type the key:\n')
        print(decrypt(ciphertext, key))
    decrypt('jsqqs avvwo', 'coffee')


