import java.util.ArrayList;

public class Copier
{

    public static ArrayList<String> eqq(String[] a1, String[] a2)
    {
	ArrayList<String> ret = new ArrayList<>();
	int ll = a1.length;
	if (ll>a2.length)
	    ll=a2.length;
	for (int i=0; i<ll; i++)
	{
	    if (a1[i].contentEquals(a2[i]))
		ret.add(a1[i]);
	}
	return ret;
    }
    
    public static void main(String[] args)
    {
	String[] as1 = { "A", "C", "D"};
	String[] as2 = { "B", "C", "E", "Q"};
	ArrayList<String> ss = Copier.eqq(as1, as2);
	System.out.println(ss);
    }

}