#include <iostream>
#include <set>

using namespace std;

int main() {
    int n, m, num;
    set<int> result; // Using a set to store unique sorted elements

    cin >> n; // Read the size of the first array
    for (int i = 0; i < n; i++) {
        cin >> num;
        result.insert(num); // Insert into the set (automatically removes duplicates)
    }

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

    // Print sorted unique elements
    for (int val : result) {
        cout << val << " ";
    }

    return 0;
}