E-Mail - Check 2 Files for duplicates

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import sys
import re

print 'Starting cleaning'
# Open first file and add emails from file to array
with open("Unregistered.txt", "r") as ins:
    array = []
    for line in ins:
        array.append(line.replace('\n','').replace('\r',''))

# Debug Array for "\r" and "\n" characters
# print "Array : \n" + str(array)

unique = []
duplicate = []
# Open second file, chack for duplicates in first file and then save it to new file.
with open("Firmy.txt","r") as input:
    with open("newfile.txt","wb") as output:
        for line in input:
            if line.replace('\r','').replace('\n','') in array :
                print "Duplicate: " + line
                duplicate.append(line.replace('\n',''))
            else :
                output.write(line)
                unique.append(line)

# Print unique emails to screen
unique.sort()

print ''.join(unique)
print "\nUnique E-Mails :" , len(unique);
print "\nDuplicate E-Mails :" , len(duplicate);
#print '\n' , str(duplicate).replace("\n","").replace('\r','')