#ifdef LOCAL
#define _GLIBCXX_DEBUG
#endif
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using namespace std;
#define ll long long
#define rep(i,n) for(ll i=0;i<(ll)n;i++)
#define all(v) v.begin(),v.end()
const ll INF = (ll)2e18;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);

    ll N, M;
    cin >> N >> M;
    vector<string> S(N);
    vector<ll> R(N);
    ll ans = 0;
    rep(i, N){
        cin >> S[i] >> R[i];
        rep(j,4){
            if(S[i][j]=='x'&&R[i]>=1200){
                ans++;
                break;
            }
        }
    }
    cout << ans << endl;
}