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

#define rep(i, n) for (int i = 0; i < (int)n; i++)

int main() {
  int n, m;
  cin >> n >> m;
  int ans = 0;
  rep(i, n) {
    string s;
    int r;
    cin >> s >> r;
    bool f = true;
    rep(i, 4) {
      if (s[i] == 'x') f = false;
    }
    if (r >= 1200 && !f)
      ans++;
  }
  cout << ans << endl;
  return 0;
}