#include <iostream>
#include <string>
int main() {
	int N;
	std::cin >> N;
	std::string* S = new std::string[N];
	std::string* T = new std::string[N];
	for (int i = 0; i < N; i++) {
		std::cin >> S[i];
	}
	for (int i = 0; i < N; i++) {
		std::cin >> T[i];
	}

	for (int i = 0; i < N; i++) {
		if (S[i] != T[i]) {
			std::cout << i+1 << std::endl;
			std::cout << S[i] << std::endl;
			std::cout << T[i] << std::endl;
		}
	}

	return 0;
}