#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <string>
using namespace std;

int main(){
    int N;
    cin >> N;
    vector<string> v(N);
    vector<string> vv(N);
    for(int i=0; i<N; i++) cin >> v[i];
    for(int i=0; i<N; i++) cin >> vv[i];

    for(int i=0; i<N; i++)
        if(v[i] != vv[i]){
            cout << i+1 << "\n" << v[i] << "\n" << vv[i] << endl;
        }
}