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



int main() {
    int n, m;
    cin >> n >> m;
    vector<string> s(n);
    vector<int> r(n);
    rep(i, n) cin >> s[i] >> r[i];
    
    int ans = 0;
    rep(i, n) {
        if(r[i] < 1200) continue;
        bool flg = false;
        rep(j, 4) {
            if(s[i][j] == 'x') flg = true;
        }
        if(flg) ans++;
    }
    
    cout << ans << endl;
    return 0;
}