using System;

public class Program

{

    public static double empFit(int limod, int vetek)

        {

           int empFit1 = limod * vetek;

            if (empFit1<8) return 0;

            if (empFit1>8&empFit1<15) return 1;

            if (empFit1 > 15) return 2;  

​

        }

        static void Main(string[] args)

        {

            int limod, vetek,count=0;

            for (int i = 0; i < 100; i++)

            {

                limod = int.Parse(Console.ReadLine());

                vetek = int.Parse(Console.ReadLine());

                if (empFit (limod, vetek) == 2) count++;

            }

            Console.Write(count);

        }

}