using System;

public class Program {
	public static void Main(string[] args) {
		int turn = int.Parse(Console.ReadLine());
		int[] ans = new int[10];
		for (int i = 0; i < turn; i++) {
			string[] s = Console.ReadLine().Split(' ');
			for (int j = 0; j < 4; j++) {
				if (s[4].Equals("YES")) {
					ans[int.Parse(s[j])] += 1;
				} else {
					ans[int.Parse(s[j])] -= 1;
				}
			}
		}
		
		int max = -1;
		int index = -1;
		for (int i = 0; i < 10; i++) {
			if (ans[i] > max) {
				max = ans[i];
				index = i;
			}
		}
		Console.WriteLine(index);
	}
}