using System;
class Program {
    static void Main(string[] args) {
        //月と日数の配列の定義
        int[] month = new int[12] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
        int[] day = new int[12] { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

        //HappyDayの数
        int happyDays = 0;

        //判定
        for (int m = 0; m < month.Length; m++) {
            for (int d = 0; d < day.Length; d++) {
                if (month[m] == day[d] / 10 + day[d] % 10) {
                    happyDays++;
                }
            }
        }

        //出力
        Console.WriteLine(happyDays);
    }
}