#include <iostream>
using namespace std;

int n;
string s[10], t[10];

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;
        }
    }

    return 0;
}