#define _CRT_SECURE_NO_WARNINGS

#include <bits/stdc++.h>
using namespace std;


int main() {
	int n;
	cin >> n;

	int res = 0;

	// 1 つずつ調べる
	for (int i = 0; i < n; i++) {
		vector<string> s(4);
		for (int j = 0; j < 4; j++) cin >> s[j];

		int cnt = 0;
		for (int j = 0; j < 4; j++) if (s[j] == "akai") cnt++;
		if (cnt != 1) continue;

		cnt = 0;
		for (int j = 0; j < 4; j++) if (s[j] == "marui") cnt++;
		if (cnt != 1) continue;

		cnt = 0;
		for (int j = 0; j < 4; j++) if (s[j] == "okii") cnt++;
		if (cnt != 1) continue;

		cnt = 0;
		for (int j = 0; j < 4; j++) if (s[j] == "umai") cnt++;
		if (cnt != 1) continue;

		res++;
	}

	cout << res << endl;
}