#include <bits/stdc++.h>
using namespace std;

int main() {
    int n = 0,m = 0,ans = 0;
    cin >> n >> m;
    for (int i = 0;i < n;i++) {
        string s = "";
        int r = 0;
        cin >> s >> r;
        if (1200 <= r && ((s.substr(0,4)).contains("x"))) {
            ans++;
        }
    }
    cout << ans;
}