import java.util.ArrayList;
import java.util.Iterator;

public class IteratorTest
{
    public static void main(String[] args)
    {
	int trial = 3;
		
	ArrayList<Integer> ali = new ArrayList<>();
	for (int i=0; i<10; i++)
	{
	    ali.add(i);
	}
	for (Integer ii : ali)
	{
	    System.out.println("A" + ii);
	}
	Iterator<Integer> alIt = ali.iterator();
	while (alIt.hasNext())
	{
	    System.out.println("B" + alIt.next());
	}
	for (Iterator<Integer> alIt2 = ali.iterator(); alIt2.hasNext(); )
	{
	    System.out.println("C" + alIt2.next());
	}

	int cc=0;
	if (trial==1)
	{
	for (Integer ii : ali)
	{
	    System.out.println("R" + ii);
	    if (cc%3==0)
		ali.remove(ii);
	    cc++;
	}
	}
	
	if (trial==2)
	{
	    cc=0;
	    for (int i=0; i<ali.size(); i++)
	    {
		Integer ii = ali.get(i);
		System.out.println("R" + ii);
		if (cc%3==0)
		    ali.remove(ii);
		cc++;
	    }
	}
	if (trial==3)
	{
	    cc=0;
	    for (Iterator<Integer> alIt2 = ali.iterator(); alIt2.hasNext(); )
	    {
		Integer ii = alIt2.next();
		System.out.println("R" + ii);
		if (cc%3==0)
		    alIt2.remove();
		cc++;
	    }
	}
	for (Iterator<Integer> alIt2 = ali.iterator(); alIt2.hasNext(); )
	{
	    System.out.println("Z" + alIt2.next());
	}
	
	
    }
}