```import sysfrom Crypto.Cipher import AESimport base64
def dec(cip, key):    plain=""    for i in range(len(cip)):        space = 0x20        val = 0x7e - 0x20 + 1        val2 = ord(key[i % len(key)])        plain+=chr((((ord(cip[i]) - space) -  (val2 - space)) % val) + space)    return plain key1 = "SECCON"key2 = "seccon2019"cipher = "FyRyZNBO2MG6ncd3hEkC/yeYKUseI/CxYoZiIeV2fe/Jmtwx+WbWmU1gtMX9m905"
plain_1 = base64.b64decode(cipher)cipher = AES.new(key2 + chr(0x00) * (16 - (len(key2) % 16)), AES.MODE_ECB)
p = 16 - (len(plai_1) % 16)plain_2 = cipher.decrypt(plain_1+ chr(p) * p)
print(plain_1=dec(plain2,key1))```