//#define _GLIBCXX_DEBUG
#include<bits/stdc++.h>

using namespace std;

#define rep(i, l, n) for(int i = (int)(l); i < (int)(n); i++)
#define ll long long
#define ld long double
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()

template<class T> void chmin(T &a, T b) {if(a > b) a = b;}
template<class T> void chmax(T &a, T b) {if(a < b) a = b;}
template<class T> using spq = priority_queue<T, vector<T>, greater<T>>;

//bool -> Yes/No
string answer(const bool b) {
    if(b) return "Yes";
    else return "No";
}

void fix(int k) {cout << fixed << setprecision(k);}

template<class T> void out(T a) {
    cout << a << endl;
}

const int inf = 2e9;
const ll INF = 2e18;
const ld pi = 3.14159265358979323846264338;

array<int, 4> dx = {0, 0, -1, 1}, dy = {-1, 1, 0, 0};

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int cnt = 0;
    int n, m; cin >> n >> m;
    while(n--) {
        string s; int rating; cin >> s >> rating;
        if(rating >= 1200) {
            if(s[0] == 'x' || s[1] == 'x' || s[2] == 'x' || s[3] == 'x') cnt++;
        }
    }
    cout << cnt << '\n';
}