#include <vector>
#include <iostream>
#include <string>
#include <ostream>
#include <map>
#include <set>
#include <bitset>
#include <cmath>
#include <iomanip>
#include <algorithm>
#include <list>
#include <regex>
#define rep(i, n) for (int i = 0; i < (n); i++)
#define reps(i, n) for (int i = 1; i < (n); i++)
using namespace std;

int main()
{
    int n, m;
    cin >> n >> m;
    int cnt = 0;
    rep(i, n)
    {
        string s;
        int r;
        cin >> s >> r;
        if((s[0] == 'x' || s[1] == 'x' || s[2] == 'x' || s[3] == 'x') && r >= 1200)cnt++;
    }cout << cnt << endl;
}