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

void solve() {
    int n;
    std::cin >> n;

    std::vector<std::string> ss(n), ts(n);
    for (auto& s : ss) std::cin >> s;
    for (auto& t : ts) std::cin >> t;

    for (int i = 0; i < n; ++i) {
        if (ss[i] == ts[i]) continue;
        std::cout << i + 1 << std::endl
                  << ss[i] << std::endl
                  << ts[i] << std::endl;
    }
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}