#include <bits/stdc++.h>

using namespace std;

int n;
string S[11], T[11];

int main() {
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> S[i];
    }
    for (int i = 0; i < n; i++) {
        cin >> T[i];
    }
    for (int i = 0; i < n; i++) {
        if (S[i] != T[i]) {
            cout << i + 1 << endl;
            cout << S[i] << endl;
            cout << T[i] << endl;
        }
    }
}