#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define all(a) begin(a) end(a)
#define rep(i,a,b) for(ll i = a; i < (b); i++)

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