Bruting through missing cookie byte

cookie.py

decoded_hex ="e95861534e4b60fa3284e09a8c9f66670f895fe5644e61"
from urllib import quote
import requests
for i in range(0,0xff):
	cookie = decoded_hex + format(i, '02x')
	#print cookie
	cookie = quote(cookie.decode('hex').encode('base64'))
	cookies = dict(mission017session=cookie)
	content = requests.get("http://gynvael.coldwind.pl/b8263ba523af6ebd992e3782e9edd99fbdad4203_mission017/", cookies=cookies)
	text = content.text
	if "Not JSON?" in text:
		continue
	else:
		print text