#!/usr/local/bin/python
"""Encode:
   otp.py message pad > ciphertext
   Decode:
   otp.py ciphertext pad > deciphertext
   and deciphertext == message.
   XORs message and pad.. For ^ (XOR),
   see Python Ref Manual (Binary Wiwise Operations):
   http://www.python.org/doc/current/ref/bitwise.html"""

from sys import*
t=p=1
s,i,j=stdout,open(argv[1], 'r'),open(argv[2], 'r')
while(t and p):
    t,p=i.read(1),j.read(1)
    t and p and s.write(chr(ord(t)^ord(p)))