#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <cmath>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;
typedef long long lint;

#define MIN(a,b) ((a)<(b)?(a):(b))
#define MAX(a,b) ((a)>(b)?(a):(b))

int main()
{
	int n;
	cin >> n;
	vector<string> s(n), t(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 << s[i] << endl << t[i] << endl;
			break;
		}
	}
		
	return 0;
}