import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        if(!sc.hasNextInt()){
            System.out.print("Invalid input");
            return;
        }
        int n=sc.nextInt();
        if(n<1||n>100){
            System.out.print("Invalid input");
            return;
        }
        Set<Integer> set1=new LinkedHashSet<>();
        for(int i=0;i<n;i++){
               if(!sc.hasNextInt()){
            System.out.print("Invalid input");
            return;
        }
            set1.add(sc.nextInt());
         
        }
        int m=sc.nextInt();
        if(!sc.hasNextInt()){
            System.out.print("Invalid input");
            return;
        if(m<0){
            System.out.print("Invalid input");
            return;
        }
        
        Set<Integer> set2=new LinkedHashSet<>();
        for(int i=0;i<m;i++){
            
        }
            set2.add(sc.nextInt());
            
        }
        set1.addAll(set2);
        for(int num:set1){
        System.out.print(num+" ");
        }
    }
}