// #include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
constexpr ll inf = (1LL << 61);
ll dx[4] = {0, 1, 0, -1};
ll dy[4] = {-1, 0, 1, 0};
#define rep(i, n) for (ll i = 0; i < (ll)(n); ++i)
#define REP(i, init, n) for (ll i = (ll)init; i < (ll)(n); ++i)
// ll op(ll a, ll b) { return max(a, b); }
// ll e() { return -inf; }

int main() {
  ll n, m;
  cin >> n >> m;
  ll cnt = 0;
  rep(i, n) {
    string s;
    cin >> s;
    ll r;
    cin >> r;
    bool flag = false;
    rep(j, m) {
      if (j < 4 && s[j] == 'x') {
        flag |= true;
      }
    }
    if (flag && r >= 1200)
      ++cnt;
  }
  cout << cnt << endl;
}