#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

int main() {
    int n;
    cin >> n;
    string s[2*n];
    for (int i = 0; i < 2*n; i++) cin >> s[i];
    for (int i = 0; i < n; i++)
        if (s[i] != s[i+n]) cout << i+1 << endl << s[i] << endl << s[i+n] << endl;
    return 0;
}