#ifndef ONLINE_JUDGE
#define _GLIBCXX_DEBUG
#endif
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using namespace std;
#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
#define ll long long
#define bigmod 1000000007
#define P pair<ll,ll>
#define T tuple<ll,ll,ll>
#define nall(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()//逆順ソート
#define inf 2000000000000000000LL
#define mint modint998244353
#define mkp make_pair
#define mkt make_tuple
template<class X> using priority_minq = priority_queue<X, vector<X>, greater<X>>;//小さい順
ll min(ll a1,ll b1){if(a1>b1)return b1;else return a1;}
ll max(ll a1,ll b1){if(a1>b1)return a1;else return b1;}
#define chmax(x,y) x = max(x,y)
#define chmin(x,y) x = min(x,y)

//cout << fixed << setprecision(10); double型出力するときに使うやつ

ll n,m;
string st[200009];

int main(){
    cin >> n >> m;
    ll ans = 0;
    rep(i,n){
        ll r;
        cin >> st[i] >> r;
        if(r >= 1200){
            if(st[i][0] == 'x' || st[i][1] == 'x' || st[i][2] == 'x' || st[i][3] == 'x')ans++;
        }
    }
    cout << ans << endl;
}