#!/usr/bin/python3

required_fields = { "byr", "iyr", "eyr", "hgt", "hcl", "ecl", "pid",}

valid = 0
with open("input") as fh:
    all_data = fh.read()
    passport_strings = all_data.split("\n\n")
    for ps in passport_strings:
        fields = ps.split()
        passport = {}
        for f in fields:
            k, v = f.split(":")
            passport[k] = v
        if required_fields - set(passport.keys()) == set():
            valid += 1
print(valid)