#include <iostream>
#include <set>
using namespace std;

int main() {
    int n, m;
    cin >> n;
    set<int> sortedUnion;

    for (int i = 0; i < n; i++) {
        int num;
        cin >> num;
        sortedUnion.insert(num);
    }

    cin >> m;
    for (int i = 0; i < m; i++) {
        int num;
        cin >> num;
        sortedUnion.insert(num);
    }

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

    return 0;
}