#!/usr/bin/env python

import re
import argparse


RE_ABBA = re.compile(r'(\w)(?!\1)(\w)\2\1')
RE_HYPERNET = re.compile(r'\[[^\]]+\]')

def load_file(filename):
    with open(filename) as f:
        for line in f:
            yield line.strip()

def check_ip(data):
    for line in RE_HYPERNET.findall(data):
        if RE_ABBA.search(line):
            return 0
    x = RE_ABBA.search(data)
    if RE_ABBA.search(data):
        return 1
    return 0

def main(args):
    count = 0
    for LINE in load_file(args.input):
        count += check_ip(LINE)

    print(count)

if __name__ == "__main__":
    parser = argparse.ArgumentParser(description='AdventOfCode 2016 Day 01')
    parser.add_argument('--input', '-i', action='store',  required=True, help='input file')
    args = parser.parse_args()

    main(args)