#include <iostream>
#include <string>

using namespace std;

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