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

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
	
	int N,M; cin >> N >> M;
	int answer = 0;
	while(N--){
		string s; cin >> s;
		int r; cin >> r;
		if(r < 1200) continue;
		for(int i=0; i<4; i++) if(s.at(i) == 'x'){answer++; break;}
	}
	cout << answer << endl;
}