#include <iostream>
#include <string>
#include <vector>
#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];
    }
    string test;
    for(int i = 0;i < n;i++){
        cin >> test;
        if(test != s[i]) cout << i + 1 << "\n" << s[i] << "\n" << test;
    }
    
    return 0;
}