using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static string InputPattern = "InputX";

    static List<string> GetInputList()
    {
        var WillReturn = new List<string>();

        if (InputPattern == "Input1") {
            WillReturn.Add("4 7");
            WillReturn.Add("xxooooo 1000");
            WillReturn.Add("oooooxo 1400");
            WillReturn.Add("oooxxox 1300");
            WillReturn.Add("ooxoxxx 1200");
            //2
        }
        else if (InputPattern == "Input2") {
            WillReturn.Add("3 5");
            WillReturn.Add("oooox 1500");
            WillReturn.Add("ooxxo 1100");
            WillReturn.Add("xxxxx 800");
            //0
        }
        else if (InputPattern == "Input3") {
            WillReturn.Add("8 10");
            WillReturn.Add("ooooooxxxx 1500");
            WillReturn.Add("oooxoxoxox 1600");
            WillReturn.Add("xxoxxxxxxx 400");
            WillReturn.Add("ooooxxxxxx 600");
            WillReturn.Add("oooooooooo 2300");
            WillReturn.Add("xoxxxoxoxo 1200");
            WillReturn.Add("oooxoxoxox 1300");
            WillReturn.Add("ooooxxxxxx 400");
            //3
        }
        else {
            string wkStr;
            while ((wkStr = Console.ReadLine()) != null) WillReturn.Add(wkStr);
        }
        return WillReturn;
    }

    static void Main()
    {
        List<string> InputList = GetInputList();
        //int[] wkArr = InputList[0].Split(' ').Select(pX => int.Parse(pX)).ToArray();

        int Answer = 0;
        foreach (string EachStr in InputList.Skip(1)) {
            string[] SplitArr = EachStr.Split(' ');
            string Result = SplitArr[0];
            int Rate = int.Parse(SplitArr[1]);

            bool HasBatu = false;
            for (int I = 0; I <= 3; I++) {
                if (Result[I] == 'x') HasBatu = true;
            }

            if (HasBatu && Rate>=1200) {
                Answer++;
            }
        }
        Console.WriteLine(Answer);
    }
}