import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		try (Scanner scan = new Scanner(System.in)) {
			int N = scan.nextInt();
			boolean isNo[] = new boolean[10];
			int count[] = new int [10];
			
			for(int i=0; i<N; i++) {
				int v1 = scan.nextInt();
				int v2 = scan.nextInt();
				int v3 = scan.nextInt();
				int v4 = scan.nextInt();
				String s = scan.next();
				
				if(s.equals("YES")) {
					count[v1]++;
					count[v2]++;
					count[v3]++;
					count[v4]++;
					
				} else if(s.equals("NO")) {
					isNo[v1] = isNo[v2] = isNo[v3] = isNo[v4] = true;
				}
			}
			
			int max = 0;
			for(int i=0; i<10; i++) {
				max = Math.max(max, count[i]);
			}
			for(int i=0; i<10; i++) {
				if(count[i] == max && isNo[i] == false) {
					System.out.println(i);
					break;
				}
			}
		}
	}
}