#include "bits/stdc++.h"

using namespace std;
using ll = long long;
using IP = pair<int, int>;


#define INF 999999999
#define atcoder(int)1e9+7
#define Endl endl

int main() {

	int n;
	string a[100],b[100];

	cin >> n;

	for (int i = 0; i < n; i++) cin >> a[i];

	for (int i = 0; i < n; i++) cin >> b[i];
	
	for (int i = 0; i < n; i++) {
		if (a[i] != b[i])
			cout << i + 1 << endl << a[i] << endl<< b[i] << endl;
	}

	return 0;
}