#include<iostream>
using namespace std;
#define rep(i,n) for(int i=0;i<(n);++i)

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