#include <iostream>
#include <vector>
#include <string>
#include <cstring>
#include <math.h>
#include <cmath>
#include <limits.h>
#include <map>
#include <set>
#include <queue>
#include <algorithm>
#include <functional>
#include <stdio.h>
using namespace std;

int main() {
    
    string s1[10];
    string s2[10];
    int N;
    cin >> N;
    
    for ( int i = 0; i < N; i++ ) {
        cin >> s1[i];
    }    
    for ( int i = 0; i < N; i++ ) {
        cin >> s2[i];
    }
    
    for ( int i = 0; i < N; i++ ) {
        if ( s1[i] != s2[i] ) {
            cout << i+1 << endl;
            cout << s1[i] << endl;
            cout << s2[i] << endl;
        }
    }
    
    return 0;
}