import ecdsa, ecdsa.der, ecdsa.util, hashlib
import hashlib, os, re, struct
import bitcoin

f1=open("output","a") # f1=open("output","w")
firstfile= [line.rstrip('\n') for line in open("file1t")]
secondfile= [line.rstrip('\n') for line in open("file2")]

for firstline in firstfile:
  if firstline in secondfile:
    print >>f1, (firstline)