#include <iostream>
#include <vector>
#include <set>
#include <algorithm>

using namespace std;

int main() {
    int n, m;


    cin >> n;
    vector<int> arr1(n);
    for (int i = 0; i < n; ++i) {
        cin >> arr1[i];
    }


    cin >> m;
    vector<int> arr2(m);
    for (int i = 0; i < m; ++i) {
        cin >> arr2[i];
    }

    set<int> uniqueElements;
    for (int num : arr1) {
        uniqueElements.insert(num);
    }
    for (int num : arr2) {
        uniqueElements.insert(num);
    }

    vector<int> result(uniqueElements.begin(), uniqueElements.end());
    sort(result.begin(), result.end());

    for (int num : result) {
        cout << num << " ";
    }
    cout << endl;

    return 0;
}