#include <iostream>
using namespace std;

int main(void)
{
    int n;
    cin >> n;
    string *s1 = new string[n];
    string *s2 = new string[n];
    for (int i = 0; i < n; i++)
        cin >> s1[i];
    for (int i = 0; i < n; i++)
    {
        cin >> s2[i];
        if (s1[i] != s2[i])
        {
            cout << i+1 << endl;
            cout << s1[i] << endl;
            cout << s2[i] << endl;
            break;
        }
    }

    return 0;
}