#include<iostream>
#include<string>
#include<algorithm>
#include<cctype>
#include<set>
#include<bitset>
#include<math.h>
#include<map>
#include<queue>
#include<iomanip>
using namespace std;

int main(){
    int n;
    cin >> n;
    vector<string> s(n), t(n);
    for (int i = 0; i < n; i++) cin >> s[i];
    for (int i = 0; i < n; i++) cin >> t[i];
    for (int i = 0; i < n; i++){
        if (s[i] != t[i]){
            cout << i+1 << endl << s[i] << endl << t[i] << endl;
            break;
        }
    }
}