import std;
void main() {
	int n, m, shocked = 0;
	readf("%d %d\n", &n, &m);
	foreach(_; 0..n) {
		string s;
		int r;
		readf("%s %d\n", &s, &r);
		assert(s.length == m);
		if(s[0..4].any!("a == 'x'") && r >= 1200) {
			shocked++;
		}
	}
	writeln(shocked);
}