#include <bits/stdc++.h>
using namespace std;
int main() {
	int n, m; cin >> n >> m;
	int x = 0;
	for (int i = 0; i < n; i++) {
		string s; cin >> s; int r; cin >> r;
		bool b = false;
		for (int j = 0; j < 4; j++) {
			if (s[j] == 'x') b = true;
		}
		if (b && r >= 1200) x++;
	}
	cout << x << endl;
}