import java.util.Scanner;

public class Main{

	static final Scanner s=new Scanner(System.in);

	public static void main(String args[]){
		input();
		solve();
	}


	static int		n, in[][];
	static String	f[];

	private static void input(){
		n=s.nextInt();
		in=new int[n][4];
		f=new String[n];
		for(int i=0; i<n; i++){
			for(int j=0; j<4; j++)
				in[i][j]=s.nextInt();
			f[i]=s.next();
		}
	}

	private static void solve(){
		int[] res=new int[10];
		for(int i=0; i<n; i++){
			switch(f[i]){
			case "YES":
				for(int j=0; j<4; j++)
					res[in[i][j]]++;
				break;
			case "NO":
				for(int j=0; j<4; j++)
					res[in[i][j]]=-1;
				break;
			}
		}
		int result=-1, v=-1;
		for(int i=0; i<10; i++){
			if(v<res[i]){
				v=res[i];
				result=i;
			}
		}
		//System.out.println(Arrays.toString(res));
		System.out.println(result);
	}
}