#include<bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < (n); ++i)
using ll = long long;

int main(){
    ll n, m;
    cin >> n >> m;
    int ans = 0;
    rep(i, n){
        string s; ll rate;
        cin >> s >> rate;
        if(rate < 1200) continue;
        rep(j, 4){
            if(s[j] == 'x'){
                ans++;
                break;
            }
        }
    }
    cout << ans << endl;
}