#include <iostream>
#include <string>
#include <algorithm>
#include <functional>
#include <vector>
#include <utility>
#include <cstring>
#include <iomanip>
#include <numeric>
#include <cmath>
#include <queue>
#include <map>
using namespace std;
typedef long long ll;
const int INF = 1<<30; 
const int MOD = 1e9 + 7;
const int dy[] = {1, 0, -1, 0};
const int dx[] = {0, 1, 0, -1};
int main()
{
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n;
    cin >> n;
    vector<int> v(n);
    for(int i = 0; i < n; i++) cin >> v[i];
    int m;
    cin >> m;
    vector<int> w(m);
    for(int i = 0; i < m; i++) cin >> w[i];
    vector<int> result;
    set_union(v.begin(), v.end(), w.begin(), w.end(), back_inserter(result));
    for(int i = 0; i < result.size(); i++) cout << result[i] << endl;
    return 0;
}


