#include <bits/stdc++.h>
#include <algorithm>
#define rep(i,n) for(ll i = 0;i<n;i++) 
#define space " "
using namespace std;
using ll = long long;

ll powll (ll a,ll p){
    ll res = 1;
    for(ll i = 0;i<p;i++)res*=a;
    return res;
}

int main() {
    ll n,m;
    cin >> n >> m;
    vector<pair<ll,string>> dat(n);
    rep(i,n)
    cin >> dat[i].second >> dat[i].first;
    ll ans = 0;
    rep(i,n){
        if(dat[i].first>=1200){
            rep(j,4){
                if(dat[i].second[j]=='x'){
                    ans++;
                    break;
                }
            }
        }
    }
    cout << ans << endl;
}