#include<iostream>
#include<algorithm>
#include <vector>
#include<cmath>
using namespace std;
typedef long long int lont;
int main() {
	int N;
	cin >> N;
	vector<string>veca(N);
	vector<string>vecb(N);
	int I;
	for (int ia = 0; ia < N; ia++) {
		cin >> veca.at(ia);
	}
	for (int ib = 0; ib < N; ib++) {
		cin >> vecb.at(ib);
	}
	for (int ic = 0; ic < N; ic++) {
		if (veca.at(ic) != vecb.at(ic)) {
			I = ic + 1;
			break;
		}
	}
	cout << I <<endl<< veca.at(I-1) <<endl<< vecb.at(I-1) << endl;
}