#include <iostream>
#include <algorithm>
#include <vector>
#include <string>

int main() {
    int n;
    std::cin >> n;

    std::vector<std::string> a(n), b(n);
    for (int i = 0; i < n; i++) std::cin >> a[i];
    for (int i = 0; i < n; i++) std::cin >> b[i];

    for (int i = 0; i < n; i++) {
        if (a[i] != b[i]) {
            std::cout << i + 1 << std::endl;
            std::cout << a[i] << std::endl;
            std::cout << b[i] << std::endl;
        }
    }
}