import java.util.*;

class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		
		int n = sc.nextInt();
		String[] s = new String[n];
		for (int i=0; i<n; i++) s[i] = sc.next();
		String[] t = new String[n];
		for (int i=0; i<n; i++) t[i] = sc.next();
		
		
		for (int i=0; i<n; i++) {
			if (!s[i].equals(t[i]) || n==1) {
				System.out.println(i+1);
				System.out.println(s[i]);
				System.out.println(t[i]);
				return;
			}
		}
		
	}
}