#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <queue>
#include <cmath>
#include <climits>
#include <iomanip>
#include <set>
#include <map>
using namespace std;
typedef long long ll;
int main(){
    ll n;
    cin >> n;
    vector<string> a(n);
    vector<string> b(n);
    for(int i = 0;i < n;i++)cin >> a[i];
    for(int i = 0;i < n;i++)cin >> b[i];
    for(int i = 0;i < n;i++){
        if(a[i] != b[i]){
            cout << i + 1 << endl;
            cout << a[i] << endl;
            cout << b[i] << endl;
            return 0;
        }
    }
}