#include "bits/stdc++.h"
using namespace std;

int main() {
	int N;
	string S[10], T;
	cin >> N;
	for (int i = 0; i < N; i++) {
		cin >> S[i];
	}
	for (int i = 0; i < N; i++) {
		cin >> T;
		if (T != S[i]) {
			cout << i + 1 << endl;
			cout << S[i] << endl << T << endl;
		}
	}
}