#include <bits/stdc++.h>
//#include <atcoder/modint>

using namespace std;
//using namespace atcoder;
using ll = long long;
//using mint = modint998244353;

int main(){
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);

    int N, M, sm=0, ans=0, r;
    cin >> N >> M;
    string s;
    for (int i=0; i<N; i++){
        cin >> s >> r;
        sm = 0;
        for (int j=0; j<4; j++) sm += (s[j] == 'x');
        ans += (r >= 1200 && sm > 0);
    }
    cout << ans << endl;

    return 0;
}