import java.util.*;
public class AlexSam
{
    public static void main(String[] args)
    {
        Scanner sc=new Scanner(System.in);
        int n1=sc.nextInt();
        int[] arr1=new int[n1];
        for(int i=0;i<n1;i++)
        {
            arr1[i]=sc.nextInt();
        }
        int n2=sc.nextInt();
        int[] arr2=new int[n2];
        for(int i=0;i<n2;i++)
        {
            arr2[i]=sc.nextInt();
        }
        TreeSet <Integer> ts=new TreeSet<>();
        for(int num:arr1)
        {
            ts.add(num);
        }
        TreeSet <Integer> ts1=new TreeSet<>();
        for(int num:arr2)
        {
            ts1.add(num);
        }
        TreeSet <Integer> inter = new TreeSet<>(ts);
        inter.retainAll(ts1);
        if(inter.isEmpty)
        {
            System.out.print("No common elements");
        }
        for(int num:inter)
        {
            System.out.print(num+" ");
        }
    }
}