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

using ll = long long;

int main() {
    int n, m; cin >> n >> m;
    int sum = 0;
    for(int i = 0; i < n; ++i) {
            string s; cin >> s;
            int rate; cin >> rate;
            if((int)s.size() >= 4 && (s[0] == 'x' || s[1] == 'x' || s[2] == 'x' || s[3] == 'x') && rate >= 1200) ++sum;
        }
    cout << sum << flush;
    return 0;
}