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

int main() {
    int n;
    cin >> n;
    vector<string> s(n,"");
    for(int i = 0;i < n;i++){
        cin >> s[i];
    }
    for(int i = 0;i < n;i++){
        string t;
        cin >> t;
        if(s[i] != t)cout << i+1 << endl << s[i] << endl << t << endl;
    }
    return 0;
}