import java.util.Arrays;
import java.util.Scanner;

public class Yukicoder24 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int a, b, c, d, max = -100, index = 0;
		
		int[] num = new int[10];
		Arrays.fill(num, 0);
			
		for (int i = 0; i < n; i++) {
			a = sc.nextInt();
			b = sc.nextInt();
			c = sc.nextInt();
			d = sc.nextInt();
			if (sc.next().equals("NO")) {
				num[a] = -100;
				num[b] = -100;
				num[c] = -100;
				num[d] = -100;
			} else {
				num[a]++;
				num[b]++;
				num[c]++;
				num[d]++;
			}
		}
		
		for (int i = 0; i < 10; i++) {
			if (max < num[i]) {
				max = num[i];
				index = i;
			}
		}
		
		System.out.println(index);
	}
}