#include <bits/stdc++.h>
using namespace std;
#ifdef local
#include <debug.hpp>
#else
#define debug(...)
#endif
#define rep(i, n) for (int i = 0; i < n; i++)
template <class T> istream& operator>>(istream& I, vector<T>& V) {for (T& X : V) I >> X; return I;}
template <class T> inline bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;}
template <class T> inline bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;}
vector<int> di = {-1, 1, 0, 0}, dj = {0, 0, -1, 1}; int inf = 2e9; long INF = 1e18;

int main() {
    int n, m;
    cin >> n >> m;
    vector<int> r(n);
    vector<string> s(n);
    rep(i, n) cin >> s[i] >> r[i];

    int ans = 0;
    rep(i, n) if (r[i] >= 1200) {
        int cnt = 0;
        rep(j, 4) if (s[i][j] == 'x') cnt++;
        if (cnt) ans++;
    }
    cout << ans << endl;
    return 0;
}