// No.547 未知の言語
// https://yukicoder.me/problems/no/547
//

#include <iostream>
#include <vector>
#include <tuple>
using namespace std;

tuple<int, string, string> solve(vector<string>& wordsS, vector<string>& wordsT);


int main() {
    int N;
    cin >> N;
    vector<string> wordsS;
    vector<string> wordsT;

    string tmp;
    for (auto i = 0; i < N; i++) {
        cin >> tmp;
        wordsS.push_back(tmp);
    }
    for (auto i = 0; i < N; i++) {
        cin >> tmp;
        wordsT.push_back(tmp);
    }

    tuple<int, string, string> ans = solve(wordsS, wordsT);
#if 1
    cout << get<0>(ans) << endl;
    cout << get<1>(ans) << endl;
    cout << get<2>(ans) << endl;
#else
    int a;
    string s, t;
    tie(a, s, t) = ans;
    cout << a << endl << s << endl << t << endl;
#endif
}

tuple<int, string, string> solve(vector<string>& wordsS, vector<string> &wordsT) {
    for (auto i = 0; i < wordsS.size(); i++) {
        if (wordsS[i] != wordsT[i]) {
            return make_tuple(i+1, wordsS[i], wordsT[i]);
        }
    }
}