ИБ 4 лаба

alphabet = ' АБВГДЕЖЗИЙКЛМНОПРСТУФХЦЧШЩЬЫЪЭЮЯабвгдеёжзийклмнопрстуфхцчшщъыьэюяABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz.,!?0123456789@#$%^&*()'

message = input("Enter message:\n")
key = input("Enter key:\n")

coded_message = ""

for i in range(len(message)):
  index = alphabet.index(key[i])
  index2 = alphabet.index(message[i])
  new_alphabet = alphabet[index2:] + alphabet[:index2]
  coded_message += new_alphabet[index]
print("Coded message:", coded_message)

decoded_message = ""

for i in range(len(coded_message)):
  index2 = alphabet.find(key[i])
  new_alphabet = alphabet[index2:] + alphabet[:index2]
  index = new_alphabet.find(coded_message[i])
  decoded_message += alphabet[index]
print("Decoded message:", decoded_message)