text: from base64 import b64decode
  from Crypto.Cipher import AES
  
  with open("7.txt","r") as f:
  	cipher=b64decode(f.read())
  
  key = "YELLOW SUBMARINE"
  key_obj = AES.new(key, AES.MODE_ECB)
  plaintext = key_obj.decrypt(cipher)
  print(plaintext)
  