package algo;

import java.util.*;

public class sample7 {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		String[] s1 = new String[N];
		String[] s2 = new String[N];
		for(int i=0; i < N; i++) {
			s1[i] = sc.next();
		}
		for(int i=0; i<N; i++) {
			s2[i] = sc.next();
		}
		for(int i=0; i < N; i++) {
			if(s1[i].equals(s2[i])) {
			}
			else {
				System.out.println(i+1);
				System.out.println(s1[i]);
				System.out.println(s2[i]);
				return;
			}
		}
	}
}