#include <iostream>
#include <string>
#include <cmath>

using namespace std;

int main()
{
	int N, A, B, C, D, bit = pow<int, int>(2, 10) - 1;
	string R;

	cin >> N;
	for (int i = 0; i < N; i++) {
		cin >> A >> B >> C >> D >> R;
		bit &= (R[0] == 'Y' ? (1 << A) + (1 << B) + (1 << C) + (1 << D) : ~((1 << A) + (1 << B) + (1 << C) + (1 << D)));
	}

	for (int i = 0; i < 10; i++)
		if (bit == 1 << i)
			cout << i << endl;

	return 0;
}