#include <iostream>
#include <string>
using namespace std;

#define p(x) cout << x << endl;
#define el cout << endl;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);

    int n;
    cin >> n;

    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;
            cout << s[i] << endl;
            cout << t[i] << endl;
            break;
        }
    }
}