using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Application
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			var N = readInt (' ');
			var ns = new int[10];

			for (int i = 0; i < ns.Length; i++) {
				ns [i] = 1;
			}

			for (int i = 0; i < N; i ++) {
				var L = readItems (' ');
				var a = int.Parse (L [0]);
				var b = int.Parse (L [1]);
				var c = int.Parse (L [2]);
				var d = int.Parse (L [3]);
				var ds = new int[]{a,b,c,d};
				var r = L [4];

				if (r == "NO") {
					foreach (var idx in ds) {
						ns [idx] = 0;
					}
				} else {
					foreach (var idx in ds) {
						{
							if (ns [idx] == 0) {
								continue;
							}
							ns [idx]++;
						}
					}
				}
			}
	

			int max = int.MinValue;
			int result = -1;
			for (int idx = 0; idx < ns.Length  ; idx++) {
				if (ns[idx] > max) {
					max = ns [idx];
					result = idx;
				}
			}

			writeLine (result);
		}
				
		static void writeLine (object o)
		{
			System.Console.WriteLine (o.ToString ());
		}

		static String[] readItems (char c)
		{
			return System.Console.ReadLine ().Split (c);
		}

		static int readInt (char c)
		{
			return readInts (c) [0];
		}

		static int[] readInts (char c)
		{
			return readItems (c).Select (x => int.Parse (x)).ToArray ();
		}

	}
}