#include <iostream>
#include <vector>
using namespace std;

vector<string> s, t;

int main()
{
    int n;
    cin >> n;
    for (int i = 0; i < n; i++)
    {
        string a;
        cin >> a;
        s.push_back(a);
    }
    for (int i = 0; i < n; i++)
    {
        string a;
        cin >> a;
        if (a != s[i])
        {
            cout << i + 1 << endl;
            cout << s[i] << endl;
            cout << a << endl;
            return 0;
        }
    }
}