import java.util.ArrayList;
import java.util.Scanner;

public class No24 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		ArrayList<Integer> noList = new ArrayList<Integer>();
		ArrayList<Integer> yesList = new ArrayList<Integer>();

		for (int i = 0; i < N; i++) {
			int A = sc.nextInt();
			int B = sc.nextInt();
			int C = sc.nextInt();
			int D = sc.nextInt();
			String R = sc.next();

			if (R.equals("YES")) {
				yesList.add(A);
				yesList.add(B);
				yesList.add(C);
				yesList.add(D);
			} else {
				noList.add(A);
				noList.add(B);
				noList.add(C);
				noList.add(D);
			}
		}

		if (yesList.size() == 0) {
			for (int i = 0; i < 10; i++) {
				if (!noList.contains(i)) {
					System.out.println(i);
				}
			}
		} else {

			int mostNo = 0;
			int mostCount = 0;
			for (int i : yesList) {
				if (noList.contains(i)) {
					continue;
				}
				int count = 0;
				for (int j : yesList) {
					if (i == j) {
						count++;
					}
				}
				if (mostCount < count) {
					mostNo = i;
					mostCount = count;
				}
			}
			System.out.println(mostNo);
		}

	}

}