using System;

public class No24 {
	public static void Main(string[] args) {
	    
	    int read = int.Parse( Console.ReadLine() );
        var checkFlag = new[]{0,0,0,0,0,0,0,0,0,0,};
	    
	    for( var i = 0; i < read; i++ ){
	        string[] query = Console.ReadLine().Split(" ");
	        
	        for( var j = 0; j < 4; j++ ){
	            if( query[4] == "YES" ){
	                checkFlag[int.Parse(query[j])]++;
	            }else{
	                checkFlag[int.Parse(query[j])]--;
	            }
	        }
	    }
	    
	    var ans = 0;
	    var max = -1;

        for( var i = 0; i < 10; i++ ){
            if( checkFlag[i] > max ){
                max = checkFlag[i];
                ans = i;
            }
        }
	    Console.WriteLine(ans);
	}
}