import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        String [] S = new String [N];
        String [] T = new String [N];
        for(int i=0; i<N; i++){
            S[i] = sc.next();
        }
        for(int i=0; i<N; i++){
            T[i] = sc.next();
        }
        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;
            }
        }
    }
}