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

public class pre {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		int a,b,c,d;
		String s;
		int[] num = new int[10];
		Arrays.fill(num,9);
		
		for(int i=0;i<n;i++){
			a = sc.nextInt();
			b = sc.nextInt();
			c = sc.nextInt();
			d = sc.nextInt();
			s = sc.next();
			
			if(s == "YES"){
				num[a]++;
				num[b]++;
				num[c]++;
				num[d]++;
			}
			else{
				num[a]--;
				num[b]--;
				num[c]--;
				num[d]--;
			}
		}
		
		int max = 0;
		
		for(int i=0;i<10;i++){
			if(num[max] < num[i])
				max = i;
		}
		
		System.out.println(max);

    }
}