#define _USE_MATH_DEFINES
#include  <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <string>
#include<math.h>
#include<iomanip>
#include<stdio.h>
#include <stdlib.h>
#include<stdio.h>
#include <queue>
#include<map>
#include <sstream>
#include<set>
#include<stack>
#include<time.h>
#include <sys/types.h>
#include <tuple>


typedef long long int ll;
//#include<bits/stdc++.h>


using namespace std;



int main()
{

    int Q;
    Q = 1;
    //cin >> Q;
   
    while (Q--) {

        int n;
        cin >> n;
        vector<string>a(n), b(n);
        for (int i = 0; i < n; i++)cin >> a[i];
        for (int i = 0; i < n; i++) {
            cin >> b[i];
            if (a[i] != b[i]) {
                cout << i + 1 << endl;
                cout << a[i] << endl;
                cout << b[i] << endl;
                return 0;
            }
        }

    }

    return 0;
}