import java.util.Scanner;
public class No24 {

	public static void main(String[] args) {
		//数当てゲーム
		
		int[] num = new int[10];
		Scanner s = new Scanner(System.in);
		int N = Integer.parseInt(s.nextLine());
		String[] abcd = new String[N];
		
		for(int i = 0;i < N;i++) {
			abcd[i] = s.nextLine();
		}
		s.close();
		
		for(String str : abcd) {
			int d;
			if(str.contains("NO")) {
				d = -1;
			}else {
				d = 1;
			}
			for(int i = 0;i < 4;i++) {
				num[Integer.parseInt(str.split(" ")[i])] += d;
			}
		}
		
		int max = 1;
		for(int i = 1;i < 10;i++) {
			if(num[i] > num[max]) {
				max = i;
			}
		}
		
		System.out.println(max);

	}

}