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

#ifdef LOCAL
#include <debug.hpp>
#else
#define debug(...)
#endif

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(20);
    int N, M;
    cin >> N >> M;
    vector<string> S(N);
    vector<int> R(N);
    for (int i = 0; i < N; i++) cin >> S[i] >> R[i];

    int ans = 0;
    for (int i = 0; i < N; i++) {
        if (count(S[i].begin(), S[i].begin() + 4, 'x') && R[i] >= 1200) ans++;
    }

    cout << ans << "\n";
}