#include <iostream>
#include <set>

using namespace std;

int main() {
    int n, m, num;
    set<int> uniqueNumbers; // Using set to store unique numbers in sorted order

    // Read first array
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> num;
        uniqueNumbers.insert(num); // Insert into set
    }

    // Read second array
    cin >> m;
    for (int i = 0; i < m; i++) {
        cin >> num;
        uniqueNumbers.insert(num); // Insert into set
    }

    // Print the sorted unique numbers
    for (int number : uniqueNumbers) {
        cout << number << " ";
        std::cout << "\n";
    }
    
    return 0;
}