#include <iostream>
#include <string>

int main() {
    using namespace std;
    int n;
    string s[10], t[10];
    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;
        }
    }
}