#define _USE_MATH_DEFINES

#include <iostream>	//cin, cout
#include <vector>	//vector
#include <algorithm> //sort,min,max,count
#include <string>	//string,getline
#include <ios>		//fixed
#include <iomanip>	//setprecision
#include <utility> //swap
#include <cstdlib>	//abs(int)
#include <cmath>	//sqrt
#include <sstream>	//stringstream,getline
#include <cmath>	//ceil,M_PI
#include <numeric>	//gcd
#include <deque>	//deque

using namespace std;

int main() {

	int N;
	cin >> N;

	vector<string> S(N);
	for (int i = 0; i < N; i++) {
		cin >> S[i];
	}

	string temp;
	for (int i = 0; i < N; i++) {
		cin >> temp;
		if (temp != S[i]) {
			cout << i + 1 << endl;
			cout << S[i] << endl;
			cout << temp << endl;
			break;
		}
	}

	return 0;

}