#include <algorithm>
#include <iostream>
using namespace std;

int main() {
  int N, M;
  cin >> N >> M;
  int ans = 0;
  while (N--) {
    string s;
    int r;
    cin >> s >> r;
    auto cond1 =
        any_of(s.begin(), s.begin() + 4, [](auto c) { return c == 'x'; });
    if (cond1 && r >= 1200) {
      ans++;
    }
  }
  cout << ans << endl;
}