#include <bits/stdc++.h>
using namespace std;
int main() {
    int n, m;
    cin >> n >> m;

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