#include<cstdio>
#include<iostream>
#include<algorithm>
#include<string>
#include<queue>
#include<vector>
#include<functional>
#include<cmath>
#include<map>
#include<stack>
#include<set>
#include<numeric>
#include<limits>

using namespace std;

int main()
{
	int N; cin >> N;
	string s[11], t[11];

	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;
			break;
		}
	}
	return 0;
}