#include <bits/stdc++.h>
using namespace std;

#define For(i, a, b) for(int i = (a); i < (b); i++)
#define rep(i, n) For(i, 0, n)
#define rFor(i, a, b) for(int i = (a); i >= (b); i--)
#define ALL(v) (v).begin(), (v).end()
#define rALL(v) (v).rbegin(), (v).rend()

using lint = long long;
using ld = long double;

int INF = 2000000000;
lint LINF = 1000000000000000000;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n, m;
    cin >> n >> m;
    int ans = 0;
    rep(i, n) {
        int r;
        string s;
        cin >> s >> r;
        bool ok1 = (r >= 1200);
        bool ok2 = false;
        rep(j, 4) {
            if (s[j] == 'x') {
                ok2 = true;
            }
        }
        if (ok1 && ok2) {
            ans++;
        }
    }
    cout << ans << "\n";
}