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

int main() {

    int N, M;
    cin >> N >> M;

    int ans = 0;

    rep(i, N) {
        string S;
        int R;
        cin >> S >> R;

        if (R < 1200)
            continue;

        rep(j, min(M, 4)) {
            if (S.at(j) == 'x') {
                ans++;
                break;
            }
        }
    }
    
    cout << ans << endl;
    return 0;
}