#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < (ll)(n); i++)
#define oke cout << "Yes" << '\n';
#define dame cout << "No" << '\n';
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
using HaiI = vector<vector<int>>;
using Hai2 = vector<vector<ll>>;
using HaiB = vector<vector<bool>>;
using Hai3 = vector<vector<vector<ll>>>;

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	cout << fixed << setprecision(15);
	ll N,M;
	cin>>N>>M;
	vector<string>S(N);
	vector<ll>R(N);
	ll cut=0;
	rep(i,N){
		cin>>S[i]>>R[i];
		bool wa=false;
		rep(j,M){
			if(j>=4){
				break;
			}
			if(S[i][j]=='x'){
				wa=true;
			}
		}
		if(R[i] >=1200 && wa){
			cut++;
		}
	}
	cout<<cut<<"\n";
}