#!/usr/bin/python3

import re

valid = 0
with open("input") as fh:
    for ln in fh:
        m = re.match(r"(\d+)-(\d+) (.): (.*)", ln)
        (first, second, char, pw) = m.groups()
        first = int(first)
        second = int(second)
        check = pw[first-1] + pw[second-1]
        num = check.count(char)
        valid += num == 1
        print(first, second, char, pw, check, valid)