using System;
using System.Text.RegularExpressions;

namespace regex
{
    class Program
    {

        static void Main(string[] args)
        {
            Regex R;
            string s;
            int counter = 0;
            string pattern = @"(^[0-6](TBX|TAX)\s((\d\d\d[1-9])|(\d\d[1-9]\d)|(\d[1-9]\d\d)|([1-9]\d\d\d))$)|^7(TBX|TAX|TEX)\s((\d\d\d[1-9])|(\d\d[1-9]\d)|(\d[1-9]\d\d)|([1-9]\d\d\d))$";
            int n = Int32.Parse(Console.ReadLine());

            for(int i = 0;i<n;i++)
            {
                s = Console.ReadLine();
                Match M = Regex.Match(s, pattern);
                if (M != Match.Empty)
                    counter++;
            }
            Console.WriteLine(counter);
        }

    }

}