#include <bits/stdc++.h>
using namespace std;
int main()
{
    int N, M;
    cin >> N >> M;
    vector<string> R(N);
    vector<int> S(N);
    for (int i = 0; i < N; ++i)
        cin >> R[i] >> S[i];
    int ans = 0;
    for (int i = 0; i < N; ++i)
    {
        bool check = false;
        if (S[i] >= 1200)
        {
            for (int j = 0; j < 4; ++j)
            {
                if (R[i][j] == 'x')
                    check = true;
            }
        }
        if (check)
            ans++;
    }
    cout << ans << endl;
    return 0;
}