package m.shin;
import java.util.Scanner;
public class Con547 {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		int N = s.nextInt();
		String[] S = new String[N];
		for(int i = 0;i < N;i++){
			S[i] = s.next();
		}
		for(int i = 0;i < N;i++){
			String str = s.next();
			if(!str.equals(S[i])){
				System.out.println(i+1);
				System.out.println(S[i]);
				System.out.println(str);
			}
		}
		s.close();

	}

}