#include <iostream>
#include <vector>
#include <algorithm>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using mint = modint998244353;
#define rep(i, n) for (int i = 0; i< (int)(n); i++) 

int main(){
    ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    int n, m; cin >> n >> m;
    int ans = 0;
    rep(i, n){
        string s; int r; cin >> s >> r;
        if(r < 1200)continue;
        bool f = false;
        rep(j, 4){
            if(s[j] == 'x')f = true;
        }
        if(f)ans++;
    }
    cout << ans << endl;

    return 0;
}