import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class No0024 {
	public static void main(String[] args){
		int val[] = new int[10];
		try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in))){
			int n = Integer.parseInt(br.readLine());
			for(int i=0; i<n; i++){
				String str = br.readLine();
				String res[] = str.split(" ", -1);
				for(int j=0; j<4; j++){
					if(res[4].equals("YES")){
						val[Integer.parseInt(res[j])]++;
					}else{
						val[Integer.parseInt(res[j])]--;
					}
				}
			}
		}catch (IOException e){
			e.printStackTrace();
		}
		int ans = 0;
		for(int i=1, buf=val[0]; i<10; i++){
			if(val[i] > buf){
				buf = val[i];
				ans = i;
			}
		}
		System.out.println(ans);
	}
}