#define _USE_MATH_DEFINES
#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <queue>
#include <math.h>
#include <cmath>
#include <stack>
#include <map>
#include <set>
#include <numeric>
#include <iomanip>
#include <climits>
#include <functional>
#include <cassert>
#include <tuple>
using namespace std;
using ll = long long;

int N;

int main() {

    cin >> N;
    int cnt = 0;
    for(int i = 0; i < N; ++i) {
        set<string> st;
        for(int j = 0; j < 4; ++j) {
            string s; cin >> s;
            if(s == "akai" || s == "marui" || s == "okii" || s == "umai") {
                st.insert(s);
            }
        }
        if(st.size() == 4) cnt ++;
    }

    cout << cnt << endl;

}