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

int N, M;
int main() {
    cin>>N>>M;
    int ans=0;
    while(N--) {
        string S; int r;
        cin>>S>>r;
        if(r < 1200) continue;
        bool ok=true;
        for(int i=0; i<4; i++)if(S[i]=='x')ok=false;
        if(!ok) ans++;
    }
    cout<<ans<<endl;
}