#!/usr/bin/env python

# s3my0n

import socket, sys, struct

host = socket.gethostbyname("vortex.labs.overthewire.org")
port = 5842

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

s.connect((host, port))

sum = 0
for i in xrange(4):
    data = s.recv(4)
    sum += struct.unpack('<I',data)[0]

packed = struct.pack("<I", sum)
s.send(packed)
print s.recv(1024)
s.close()