#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using ld = long double;
#define rep(i,n) for(int i=0;i<(n);i++)
#define drep(i,n) for(int i=(n)-1;i>=0;i--)
#define rrep(i,n) for(int i=1;i<(n);i++)
#define Yes cout << "Yes" << endl
#define No cout << "No" << endl
#define YN {cout << "Yes" << endl;}else{cout << "No" << endl;}
#define dame cout << -1 << endl
#define nall(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define vout(a) {rep(i,(int)a.size()){cout << a[i] << ' ';} cout << endl;}
#define vvout(a) rep(i,(int)a.size()){{rep(j,(int)a[i].size()) cout << a[i][j] << ' ';}cout << '\n';}
void chmax(auto& x,auto y){x = max(x,y);}
void chmin(auto& x,auto y){x = min(x,y);}
#define INF 2e9
void pirntf(ld x) {printf("%.10Lf\n",x);}
vector<int> dx = {1,0,-1,0};
vector<int> dy = {0,-1,0,1};
#define Mod 998244353

int main(){
  int n,m;
  cin >> n >> m;
  int cnt = 0;
  rep(i,n){
    int r; string s;
    cin >> s >> r;
    if(r<1200) continue;
    rep(j,m){
      if(j<4 && s[j]=='x'){cnt++; break;}
    }
  }
  cout << cnt << endl;
}