#include <bits/stdc++.h>
using namespace std;
int main() 
{
    ios::sync_with_stdio(false);
    cin.tie(NULL);
    int n, m;
    if (!(cin >> n)) return 0;
    vector<int> A(n);
    for (int i = 0; i < n; ++i)
        cin >> A[i];
    if (!(cin >> m)) return 0;
    vector<int> B(m);
    for (int i = 0; i < m; ++i)
        cin >> B[i];
    vector<int> unionSet;
    for (int x : A)
        unionSet.push_back(x);
    for (int x : B) 
    {
        bool found = false;
        for (int y : unionSet) 
        {
            if (x == y) 
            {
                found = true;
                break;
            }
        }
        if (!found)
            unionSet.push_back(x);
    }
    sort(unionSet.begin(), unionSet.end());
    unionSet.erase(unique(unionSet.begin(), unionSet.end()), unionSet.end());
    cout << "{";
    for (size_t i = 0; i < unionSet.size(); ++i) 
    {
        if (i > 0)
            cout << ",";
        cout << unionSet[i];
    }
    cout << "}" << endl;
    return 0;
}

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