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

int main() {
  int n, m;
  cin >> n >> m;
  int cnt = 0;
  for(int i=0; i<n; i++) {
    string s;
    int r;
    cin >> s >> r;
    if(r >= 1200) {
      if(s[0] == 'x' || s[1] == 'x' || s[2] == 'x' || s[3] == 'x') {
        cnt++;
      }
    }
  }
  cout << cnt << endl;
}