import java.util.Scanner;
import java.util.stream.IntStream;

public class Main{
	static final Scanner s=new Scanner(System.in);
	static IntStream REPS(int v){return IntStream.range(0,v);}
	static IntStream REPS(int l,int r){return IntStream.rangeClosed(l,r);}
	static IntStream INS(int n){return REPS(n).map(i->getInt());}
	static int getInt(){return Integer.parseInt(s.next());}

	public static void main(String[]$){
		int n=getInt();
		String[]a=REPS(n).mapToObj(i->s.next()).toArray(String[]::new);
		String[]b=REPS(n).mapToObj(i->s.next()).toArray(String[]::new);

		for(int i=0;i<n;++i)
			if(!a[i].equals(b[i])) {
				System.out.println(i+1);
				System.out.println(a[i]);
				System.out.println(b[i]);
				break;
			}
	}
}