#include <iostream>
#include <vector>
#define REP(i, n) for (int i = 0; i < n; i++)
using namespace std;

int main() {
    int N;
    cin >> N;
    vector<string> vc;
    REP(i, N) {
        string s;
        cin >> s;
        vc.push_back(s);
    }
    REP (i, N) {
        string s;
        cin >> s;
        if (s != vc.at(i)) {
            cout << i + 1 << endl;
            cout << vc.at(i) << endl;
            cout << s << endl;
            break;
        }
    }
    return 0;
}