#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0; i < int(n); i++)
#define FOR(i,a,b) for(ll i = a; i < (ll)(b); i++)
#define all(a) (a).begin(),(a).end()
using ll = long long;
using VI = vector<int>;
using P = pair<int,int>;
const long long INF = 1LL << 60;
const int DX[] = {1,0,-1,0};
const int DY[] = {0,1,0,-1};

int main(){
	cin.tie(nullptr);
	ios_base::sync_with_stdio(false);
	
	int n,m;
	cin >> n >> m;
	
	int ans = 0;
	rep(i,n){
		string s; int r;
		cin >> s >> r;
		if(r >= 1200){
			bool ok = false;
			rep(j,4){
				if(s[j] == 'x') ok = true;
			}
			if(ok) ans++;
		}
	}
	
	cout << ans << endl;
	return 0;
}