public class No188 {

    public static void main(String[] args) {
        int count = 0;
        int day = 0;
        for (int i = 1; i < 13; i++) {

            day = 1;
            for (int j = 0; j < 4; j++) {
                for (int k = 1; k < 10; k++) {
                    day++;

                    if (i == j + k) {
                        count++;
                    }

                    if (i == 2 && day == 28) {
                        break;
                    } else if ((i == 4 || i == 6 || i == 9 || i == 11)
                            && day == 30) {
                        break;
                    }
                }
            }
        }
        System.out.println(count);
    }

}