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

int main () {
  int n,m;
  cin >> n >> m;
  
  int ans = 0;
  
  for(int i = 0; i < n; i++){
    string res;
    int rate;
    cin >> res >> rate;
    
    if(rate < 1200){
      continue;
    }
    
    for(int j = 0; j < 4; j++){
      if(res[j] == 'x'){
        ans++;
        break;
      }
    }
  }
  
  cout << ans << endl;
}