#include<iostream>
#include<string>
using namespace std;
int main() {
	int n; cin >> n;
	string a[20], b[20];
	for (int i = 1; i <= n; i++) 
		cin >> a[i];
	for (int i = 1; i <= n; i++)
		cin >> b[i];
	for (int i = 1; i <= n; i++) {
		if (a[i] != b[i]) {
			cout << i << endl;
			cout << a[i] << endl;
			cout << b[i] << endl;
			return 0;
		}
	}
}