import java.util.Scanner;

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