#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

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