#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,n) for(int i=0;i<n;i++)
bool badcoder(string s) {
    bool tmp=false;
    rep(i,4) {
        if(s[i]=='x') {
            tmp=true;
        }
    }
    return tmp;
}
int main() {
    ll n,m;
    cin>>n>>m;
    ll ans=0;
    rep(i,n) {
        string s;
        ll r;
        cin>>s>>r;
        if(badcoder(s) && r>=1200) {
            ans++;
        }
    }
    cout<<ans<<endl;
}