import java.io.*;
import java.util.*;

class Main24 {
	
	public static void main (String[] args) throws IOException {
		BufferedReader br = 
			new BufferedReader(new InputStreamReader(System.in));
		
		int n = Integer.parseInt(br.readLine());
		int[] check = new int[10];
		int ans = -1, max = -1;
		
		for (int i = 0; i < n; i++) {
			String[] line = br.readLine().split(" ");
			for (int j = 0; j < line.length - 1; j++) {
				int m = Integer.parseInt(line[j]);
				if (line[4].equals("YES"))
					check[m]++;
				else
					check[m] = -1;
			}
		}
		for (int i = 0; i < check.length; i++) {
			if (max < check[i]) {
				max = check[i];
				ans = i;
			}
		}
		
		System.out.println(ans);
	}
}