#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
#include<cstdio>
#include<string>
#include<algorithm>
#include<cmath>
using namespace std;

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

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

	return 0;
}