

import math

def 						UpperCamelCase					()     ->      None:
	A__							:    Any        =		input("""Enter message: """					)
	A__							:    Optional[int]        =		int(input(f"""Enter key [2-{len(lowercase_					) - 1}]: """					)					)
	A__							:    Optional[int]        =		input("""Encryption/Decryption [e/d]: """					)

	if mode.lower().startswith("""e"""					):
		A__							:    List[str]        =		encrypt_message(lowercase_    ,      lowercase_					)
	elif mode.lower().startswith("""d"""					):
		A__							:    Union[str, Any]        =		decrypt_message(lowercase_    ,      lowercase_					)

	# Append pipe symbol (vertical bar) to identify spaces at the end.
	print(f"""Output:\n{text + '|'}"""					)

def 						UpperCamelCase					(lowercase_: int    ,      lowercase_: str					)     ->      str:
	A__							:    Union[str, Any]        =		[""""""] * key
	for col in range(lowercase_					):
		A__							:    Optional[int]        =		col
		while pointer < len(lowercase_					):
			cipher_text[col] += message[pointer]
			pointer += key
	return "".join(lowercase_					)

def 						UpperCamelCase					(lowercase_: int    ,      lowercase_: str					)     ->      str:
	A__							:    Any        =		math.ceil(len(lowercase_					) / key					)
	A__							:    List[str]        =		key
	A__							:    Optional[Any]        =		(num_cols * num_rows) - len(lowercase_					)
	A__							:    Any        =		[""""""] * num_cols
	A__							:    List[str]        =		0
	A__							:    Tuple        =		0

	for symbol in message:
		plain_text[col] += symbol
		col += 1

		if (
		    (col == num_cols)
		    or (col == num_cols - 1)
		    and (row >= num_rows - num_shaded_boxes)
		):
			A__							:    Optional[int]        =		0
			row += 1

	return "".join(lowercase_					)


if __name__ == "__main__":
	import doctest

	doctest.testmod()
	main()






def 						UpperCamelCase					(lowercase_: int = 10					)     ->      str:
	if not isinstance(lowercase_    ,      lowercase_					) or n < 0:
		raise ValueError("""Invalid input"""					)
	A__							:    List[str]        =		10**n
	A__							:    Any        =		28433 * (pow(2    ,      7830457    ,      lowercase_					)) + 1
	return str(number % modulus					)


if __name__ == "__main__":
	from doctest import testmod

	testmod()
	print(f'''{solution(10) = }''')



