#include <iostream>
#include <string>
#include <vector>

using namespace std;

int main() {

	std::ios::sync_with_stdio(false);
	std::cin.tie(0);

	int count = 0;
	string tmp;
	vector<string> S;
	vector<string> T;
	int word;
	cin >> word;
	for (int i = 0; i < word; i++) {
		cin >> tmp;
		S.push_back(tmp);
	}
	for (int i = 0; i < word; i++) {
		cin >> tmp;
		T.push_back(tmp);
	}
	for (int i = 0; i < word; i++) {
		if (S[i] != T[i]) {
			cout << i + 1<<'\n';
			cout << S[i] << '\n';
			cout << T[i];
			return 0;
		}
	}
	

	return 0;
}