def main():
    key_list = ""
    for i in xrange(10000000, 1000000000):
        key_list = key_list + str(i) + "\n"
        if len(key_list) > 10000:
            with open("./passwd1.txt", "a+") as f:
                f.write(key_list)
            # del key_list
            key_list = ""
            print "done"


if __name__ == '__main__':
    main()