#include <iostream>
#include <algorithm>
#include <string>
#include <vector>
#include <map>
#include <set>
#include <stdio.h>
#include <cstring>
#include <queue>
#include <stack>
#include <functional>
#include <math.h>
#include <iomanip>
using namespace std;
#define Would
#define you
const int INF = 999999999;
const int MOD = 1e9 + 7;

int main() {
	int n;
	cin >> n;
	vector<string>a(n), b(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;
		}
	}
}