//javaScript
s = 0; // счетчик
n = readline();
while (n != 0){
if ((n % 2 == 0) && (n % 7 == 0)){
s = s + 1; // количество найденных чисел
}
n = readline();
}
print(s);
Ly9qYXZhU2NyaXB0CnMgPSAwOyAvLyDRgdGH0LXRgtGH0LjQugpuID0gcmVhZGxpbmUoKTsKd2hpbGUgKG4gIT0gMCl7CiAgICBpZiAoKG4gJSAyID09IDApICYmIChuICUgNyA9PSAwKSl7CiAgICAgICAgcyA9IHMgKyAxOyAvLyDQutC+0LvQuNGH0LXRgdGC0LLQviDQvdCw0LnQtNC10L3QvdGL0YUg0YfQuNGB0LXQuwogICAgfQogICAgbiA9IHJlYWRsaW5lKCk7ICAKfQpwcmludChzKTs=