import sys
user = open(str(sys.argv[1]),'r')
pass = open(str(sys.argv[1]),'r')
save_file = open(str(sys.argv[1]),'w+')
for user in user_file:
	for pass in pass_file:
		save_file.write('%s:%s' % (user,pass)

user.close()
pass.close()
save_file.close