```python
from Crypto.Cipher import AES
import Crypto.Cipher.AES
from binascii import hexlify, unhexlify
'''iv: 4204204204204204204204204204204
ciphertext: ba837e4c3a40ac03cba5db3e2c77a7334b2336556d6ac1995c8cd85efed0b3dd164f1d8d0f0ff1151bdc758edb3dbdaf
'''
'''
a = 'flagflagflagflag'
key = '1111111111111111111111111111111111111111111111111111111111111111'.decode('hex')
iv = '42042042042042042042042042042042'.decode('hex')

#encrypt
aes = AES.new(key,AES.MODE_CBC, iv)
c = aes.encrypt(a).encode("hex")
print c

#decrypt
aes = AES.new(key,AES.MODE_CBC, iv)
print aes.decrypt(c.decode("hex"))
'''
import hashlib
import string
from Crypto.Util.number import long_to_bytes

a = [19,3,10,15,2]
b = [16,16,18,12,19,6,19,12,8]
c = [5,8,17,18,18,5,9,3,11,10,1,10,10,0,10]
d = [0,8,18,10,0,15,18,5,18,14,19,1,1,0,4,6,15,4,11,16,10,8,14,5,13,16,9]
for i in range(0,20):
for j in range(0,20):
for k in range(0,20):
key = a+[i]+b+[j]+c+[k]+d
m = 0
length = len(key)
for inx in range(59):
t = key[inx]%5
tt = key[inx]//5
m+=20**(length-1)*(tt*5+t)
length = length-1
key = long_to_bytes(m)
IV = unhexlify('42042042042042042042042042042042')
ciphertext = unhexlify('059fd04bca4152a5938262220f822ed6997f9b4d9334db02ea1223c231d4c73bfbac61e7f4bf1c48001dca2fe3a75c975b0284486398c019259f4fee7dda8fec')
cipher = AES.new(key,AES.MODE_CBC,IV)
plaintext = cipher.decrypt(ciphertext)
if b"Hack" in plaintext:
print(plaintext)
```