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

int main() {
  int N, M;
  cin >> N >> M;
  int ans{};
  for (int i = 0; i < N; i++) {
    string s;
    int r;
    cin >> s >> r;
    ans += (r >= 1200) &&
           (s[0] == 'x' || s[1] == 'x' || s[2] == 'x' || s[3] == 'x');
  }
  cout << ans << endl;
}