#include <bits/stdc++.h>
#define FOR(i, a, b) for (ll i = (a); i < (b); i++)
#define REP(i, n) for (ll i = 0; i < (n); i++)
#define ALL(a) (a).begin(), (a).end()
using namespace std;
using ll = long long;

int main() {
    ll N, M;
    cin >> N >> M;
    vector<ll> R(N, 0);
    vector<string> S(N);
    REP(i, N) { cin >> S[i] >> R[i]; }

    ll not_kizetu = 0;
    REP(i, N) {
        bool all = true;
        REP(j, 4) {
            char c = S[i][j];
            if (c == 'x') all = false;
        }

        if (R[i] < 1200 || all) { not_kizetu++; }
    }

    cout << N - not_kizetu << "\n";

    return 0;
}