package yukicoder;

import java.util.Scanner;

public class No24 {
	public static void main(String[] args) {
		int[] num = new int[10];
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		for(int i = 0; i < N; i++){
			int[] h = new int[4];
			String s = null;
			h[0] = sc.nextInt();
			h[1] = sc.nextInt();
			h[2] = sc.nextInt();
			h[3] = sc.nextInt();
			s = sc.nextLine();
			if(s.equals(" YES")){
				W1(num, h);
			}else if(s.equals(" NO")){
				W2(num, h);
			}
		}
		int ans = 0;
		for(int i = 1; i < 10; i++){
			if(num[ans] < num[i]){
				ans = i;
			}
		}
		System.out.println(ans);
	}
	public static int[] W1(int[] num, int[] h){
		for(int i = 0; i < 4; i++){
			num[h[i]]++;
		}
		return num;
	}
	public static int[] W2(int[] num, int[] h){
		for(int i = 0; i < 4; i++){
			num[h[i]]--;
		}
		return num;
	}
}