#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <utility>
#include <iomanip>
using namespace std;
#define diff(x, y) ((x) > (y) ? ((x) - (y)) : ((y) - (x)))

int main(void) {
	int n;
	cin >> n;
	vector <bool> ans(10,true);
	vector <int> num(4);
	string str;
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < 4; j++)
			cin >> num[j];
		cin >> str;
		if (str == "NO") {
			for (int j = 0; j < 4; j++)
				ans[num[j]] = false;
		}
		else {
			for (int j = 0; j < 10; j++) {
				if (!(j == num[0] || j == num[1] || j == num[2] || j == num[3]))
					ans[j] = false;
			}
		}
	}
	for (int i = 0; i < 10; i++) {
		if (ans[i])
			cout << i << endl;
	}
	return 0;
}