





"""simple docstring"""




import random
import sys

UpperCamelCase_           ="""ABCDEFGHIJKLMNOPQRSTUVWXYZ"""





def        a_				(							):
						_UpperCamelCase			:					List[str]     =    input('''Enter message: '''   )
						_UpperCamelCase			:					str     =    '''LFWOAYUISVKMNXPBDCRJTQEGHZ'''
						_UpperCamelCase			:					Dict     =    input('''Encrypt/Decrypt [e/d]: '''   )

						check_valid_key(_lowercase   )

						if resp.lower().startswith('''e'''   ):
												_UpperCamelCase			:					Optional[int]     =    '''encrypt'''
												_UpperCamelCase			:					List[str]     =    encrypt_message(_lowercase       ,						_lowercase   )
						elif resp.lower().startswith('''d'''   ):
												_UpperCamelCase			:					Optional[int]     =    '''decrypt'''
												_UpperCamelCase			:					Dict     =    decrypt_message(_lowercase       ,						_lowercase   )

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





def        a_				(							_lowercase   ):
						_UpperCamelCase			:					Dict     =    list(_lowercase   )
						_UpperCamelCase			:					Dict     =    list(_lowercase   )
						key_list.sort()
						letters_list.sort()

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





def        a_				(							_lowercase       ,						_lowercase   ):
						return translate_message(_lowercase       ,						_lowercase       ,						'''encrypt'''   )





def        a_				(							_lowercase       ,						_lowercase   ):
						return translate_message(_lowercase       ,						_lowercase       ,						'''decrypt'''   )





def        a_				(							_lowercase       ,						_lowercase       ,						_lowercase   ):
						_UpperCamelCase			:					Any     =    ''''''
						_UpperCamelCase			:					Dict     =    LETTERS
						_UpperCamelCase			:					Dict     =    key

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

						for symbol in message:
												if symbol.upper() in chars_a:
																		_UpperCamelCase			:					Optional[Any]     =    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        a_				(							):
						_UpperCamelCase			:					List[Any]     =    list(_lowercase   )
						random.shuffle(_lowercase   )
						return "".join(_lowercase   )


if __name__ == "__main__":
						main()










"""simple docstring"""




def        a_				(							_lowercase = 10**6   ):

						if n <= 0:
												raise ValueError('''Please enter an integer greater than 0'''   )

						_UpperCamelCase			:					Any     =    list(range(n + 1   )   )
						for number in range(2       ,						n + 1   ):
												if phi[number] == number:
																		phi[number] -= 1
																		for multiple in range(number * 2       ,						n + 1       ,						_lowercase   ):
																								_UpperCamelCase			:					List[str]     =    (phi[multiple] // number) * (number - 1)

						_UpperCamelCase			:					Union[str, Any]     =    1
						for number in range(1       ,						n + 1   ):
												if (answer / phi[answer]) < (number / phi[number]):
																		_UpperCamelCase			:					List[str]     =    number

						return answer


if __name__ == "__main__":
						print(solution())



