#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
#define rep(a, b, c) for (int a = b; a < (int)c; ++a)

vector<int> xm = {-1, 1, 0, 0};
vector<int> ym = {0, 0, 1, -1};

const ll MOD = 998244353;

int main()
{
    int n, m;
    cin >> n >> m;
    int ans = 0;
    rep(i, 0, n)
    {
        string s;
        int r;
        cin >> s >> r;
        if (r < 1200)
        {
            continue;
        }
        else
        {
            bool iwaied = false;
            rep(j, 0, 4)
            {
                if (s[j] == 'x')
                {
                    iwaied = true;
                }
            }
            ans += iwaied;
        }
    }
    cout << ans << endl;
}