ROT Challenge Pwnium

#!/usr/bin/env python

from PIL import Image
from pytesser import *
import socket
import cStringIO
import base64

HOST = '41.231.53.40'
PORT = 9090

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))

data = ''
while True:
        m = s.recv(1)
        if m!='\n':
            data+=m
        else:
            break

image_string = cStringIO.StringIO(base64.b64decode(data))

im = Image.open(image_string)

for i in range(0,10):
        v = i * 10
        box = (v,v,200-v, 200-v)
        region = im.crop(box)
        if i == 0:
                region = region.transpose(Image.ROTATE_270)
        else:
                region = region.transpose(Image.ROTATE_180)
        im.paste(region, box)

code = image_to_string(im)
print code.upper()
s.send(code.upper()+"\n")
data = ''

while True:
        m = s.recv(1)
        if m!='}':
            data+=m
        else:
            data+=m
            break

print data