package yukicoder;

import java.util.Scanner;

public class No547 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String tmp;
        String[] s;

        int n = sc.nextInt();
        s = new String[n];
        for(int i = 0; i < n; i++) {
            s[i] = sc.next();
        }

        int resultNum = 0;
        String resultS = null, resultT = null;
        for(int i = 0; i < n; i++) {
            tmp = sc.next();
            if( !s[i].equals(tmp) ) {
                resultNum = i + 1;
                resultS = s[i];
                resultT = tmp;
            }
        }

        System.out.println(resultNum);
        System.out.println(resultS);
        System.out.println(resultT);
    }
}