

import random
import sys

SCREAMING_SNAKE_CASE_						=					'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

def 							__SCREAMING_SNAKE_CASE							( )      ->				None:
				_UpperCAmelCase				:						Optional[int]       						=			input("Enter message: "       )
				_UpperCAmelCase				:						Optional[Any]       						=			"LFWOAYUISVKMNXPBDCRJTQEGHZ"
				_UpperCAmelCase				:						Optional[int]       						=			input("Encrypt/Decrypt [e/d]: "       )

				check_valid_key(lowerCAmelCase       )

				if resp.lower().startswith("e"       ):
								_UpperCAmelCase				:						int       						=			"encrypt"
								_UpperCAmelCase				:						Optional[int]       						=			encrypt_message(lowerCAmelCase     ,					lowerCAmelCase       )
				elif resp.lower().startswith("d"       ):
								_UpperCAmelCase				:						List[Any]       						=			"decrypt"
								_UpperCAmelCase				:						Tuple       						=			decrypt_message(lowerCAmelCase     ,					lowerCAmelCase       )

				print(F'\n{mode.title()}ion: \n{translated}'       )

def 							__SCREAMING_SNAKE_CASE							( lowerCAmelCase:     str       )      ->				None:
				_UpperCAmelCase				:						str       						=			list(lowerCAmelCase       )
				_UpperCAmelCase				:						Optional[int]       						=			list(lowerCAmelCase       )
				key_list.sort()
				letters_list.sort()

				if key_list != letters_list:
								sys.exit("Error in the key or symbol set."       )

def 							__SCREAMING_SNAKE_CASE							( lowerCAmelCase:     str     ,					lowerCAmelCase:     str       )      ->				str:
				return translate_message(lowerCAmelCase     ,					lowerCAmelCase     ,					"encrypt"       )

def 							__SCREAMING_SNAKE_CASE							( lowerCAmelCase:     str     ,					lowerCAmelCase:     str       )      ->				str:
				return translate_message(lowerCAmelCase     ,					lowerCAmelCase     ,					"decrypt"       )

def 							__SCREAMING_SNAKE_CASE							( lowerCAmelCase:     str     ,					lowerCAmelCase:     str     ,					lowerCAmelCase:     str       )      ->				str:
				_UpperCAmelCase				:						Tuple       						=			""
				_UpperCAmelCase				:						List[Any]       						=			LETTERS
				_UpperCAmelCase				:						Optional[int]       						=			key

				if mode == "decrypt":
								_UpperCAmelCase						,							_UpperCAmelCase				:						Union[str, Any]       						=			chars_b, chars_a

				for symbol in message:
								if symbol.upper() in chars_a:
												_UpperCAmelCase				:						Tuple       						=			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 							__SCREAMING_SNAKE_CASE							( )      ->				str:
				_UpperCAmelCase				:						Optional[int]       						=			list(lowerCAmelCase       )
				random.shuffle(lowerCAmelCase       )
				return "".join(lowerCAmelCase       )


if __name__ == "__main__":
					main()









def    _lowercase    (  _UpperCAmelCase = 99_80_01 )  ->     int:

				# fetches the next number
				for number in range(n - 1	,					99_99	,					-1 ):
								lowerCamelCase		       =str(_UpperCAmelCase )

								# checks whether 'str_number' is a palindrome.
								if str_number == str_number[::-1]:
												lowerCamelCase		       =9_99

												# if 'number' is a product of two 3-digit numbers
												# then number is the answer otherwise fetch next number.
												while divisor != 99:
																if (number % divisor == 0) and (len(str(number // divisor ) ) == 3.0):
																				return number
																divisor -= 1
				raise ValueError("""That number is larger than our acceptable range.""" )


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





