import java.util.*;

public class Yukicoder_24{
	public static void main(String[] args){
		Scanner stdIn = new Scanner(System.in);
		int N = stdIn.nextInt();
		int[] num = new int[10];
		Arrays.fill(num,10);
		for(int i=0;i<N;i++){
			int A = stdIn.nextInt();
			int B = stdIn.nextInt();
			int C = stdIn.nextInt();
			int D = stdIn.nextInt();
			String R = stdIn.next();
			char X = R.charAt(0);

			if(X=='Y'){
				num[A]++;
				num[B]++;
				num[C]++;
				num[D]++;
			}
			else if(X=='N'){
				num[A]--;
				num[B]--;
				num[C]--;
				num[D]--;
			}
		}
		int now_num = 0;
		int count = 0;
		for(int i=0;i<10;i++){
			if(num[i]>count){
				count = num[i];
				now_num = i;
			}
		}

		System.out.println(now_num);
	}
}