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

#define rep(i, n) for( int i = 0; i < n; i++ )
using ll = long long;

int main() {
	int N, M;
	cin >> N >> M;
	int ans = 0;
	rep(i, N) {
		string s;
		int r;
		cin >> s >> r;
		if(r < 1200) continue;
		int f = 0;
		rep(j, 4) {
			if(s[j] == 'x') f = 1;
		}
		if(f) ans++;
	}
	cout << ans << endl;
}