




SCREAMING_SNAKE_CASE:     str									= '''ABCDEFGHIJKLMNOPQRSTUVWXYZ'''


def 					_a							(					)->	None:
		SCREAMING_SNAKE_CASE_					      =							input('Enter message: ' )
		SCREAMING_SNAKE_CASE_					      =							input('Enter key [alphanumeric]: ' )
		SCREAMING_SNAKE_CASE_					      =							input('Encrypt/Decrypt [e/d]: ' )

		if mode.lower().startswith('e' ):
				SCREAMING_SNAKE_CASE_					      =							'encrypt'
				SCREAMING_SNAKE_CASE_					      =							encrypt_message(lowerCAmelCase    ,						lowerCAmelCase )
		elif mode.lower().startswith('d' ):
				SCREAMING_SNAKE_CASE_					      =							'decrypt'
				SCREAMING_SNAKE_CASE_					      =							decrypt_message(lowerCAmelCase    ,						lowerCAmelCase )

		print(F'''\n{mode.title()}ed message:''' )
		print(lowerCAmelCase )


def 					_a							(					lowerCAmelCase    ,						lowerCAmelCase )->	str:
		return translate_message(lowerCAmelCase    ,						lowerCAmelCase    ,						'encrypt' )


def 					_a							(					lowerCAmelCase    ,						lowerCAmelCase )->	str:
		return translate_message(lowerCAmelCase    ,						lowerCAmelCase    ,						'decrypt' )


def 					_a							(					lowerCAmelCase    ,						lowerCAmelCase    ,						lowerCAmelCase )->	str:
		SCREAMING_SNAKE_CASE_					      =							[]
		SCREAMING_SNAKE_CASE_					      =							0
		SCREAMING_SNAKE_CASE_					      =							key.upper()

		for symbol in message:
				SCREAMING_SNAKE_CASE_					      =							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 ):
								SCREAMING_SNAKE_CASE_					      =							0
				else:
						translated.append(lowerCAmelCase )
		return "".join(lowerCAmelCase )


if __name__ == "__main__":
						main()





from math import isqrt


def 					_a							(					lowerCAmelCase )->	bool:
		return all(number % divisor != 0 for divisor in range(2    ,						isqrt(lowerCAmelCase ) + 1 ) )


def 					_a							(					lowerCAmelCase = 10**6 )->	int:
		SCREAMING_SNAKE_CASE_					      =							0
		SCREAMING_SNAKE_CASE_					      =							1
		SCREAMING_SNAKE_CASE_					      =							7
		while prime_candidate < max_prime:
				primes_count += is_prime(lowerCAmelCase )

				cube_index += 1
				prime_candidate += 6 * cube_index

		return primes_count


if __name__ == "__main__":
						print(f"""{solution() = }""")