#include <iostream>
#include <iomanip>//小数点出力用
//cout << fixed << setprecision(10) << ans;
#include <cmath>
#include <algorithm>
#include <vector>
#include <queue>
#include <stack>
#include <set>
#include <map>
using ll = long long;
using namespace std;
#define modP 998244353
bool chkrng0idx(int pos, int sup) { return (0 <= pos && pos < sup); }
int clk4(int num) { return (num - 2) * (num % 2); }
void yn(bool tf) { cout << (tf ? "Yes\n" : "No\n"); }

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int N, M;cin >> N >> M;
    int ans=0;
    for (int i = 0;i < N;i++) {
        string S;int R;cin >> S >> R;
        if (R < 1200)continue;
        bool ok = 1;
        for (int j = 0;j < 4;j++)
        {
            if (S[j] == 'x')ok = 0;
        }
        if (!ok)ans++;
    }
    cout << ans;
    return 0;
}