from binascii import hexlify, unhexlify
from Crypto.Cipher import AES

picc = "CACDEC6C5455EE52BB1DA40470963113"
myaes= AES.new(16*"\x00", AES.MODE_CBC, 16*"\x00")
okay = myaes.decrypt(unhexlify(picc))

counter=int("0x"+hexlify(okay[10:11])+hexlify(okay[9:10])+hexlify(okay[8:9]),16)

print counter