import re

lines = (list(map(lambda a: a.split(':'), x.strip().split())) for x in open("input.txt"))

passport = {}
count = 0
must_have = {'iyr', 'hcl', 'hgt', 'pid', 'ecl', 'eyr', 'byr'}


def check_passport(pp):
    valid = len(set(pp).intersection(must_have)) == len(must_have)
    if not valid:
        return 0
    return 1


for line in lines:
    if len(line) == 0:
        count += check_passport(passport)
        passport = {}
    for key, val in line:
        passport[key] = val
count += check_passport(passport)
print(count)