#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 num=0;
  rep(i,n){
    string s;
    int r;
    cin>>s>>r;
    if (r>=1200 && (s[0]=='x' || s[1]=='x' || s[2]=='x' || s[3]=='x')) num++;
  }
  cout<<num<<endl;
}