#include <iostream>
#include <string>
#include <algorithm>
using namespace std;
int main(){
	int N,ans;
	cin >> N;
	string S[10], T[10];
	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]){
			ans = i;
		}
	}
	cout << ans+1 << endl;
	cout << S[ans] << endl;
	cout << T[ans] << endl;
}