import java.util.*;

public class MyList {
    public static void main(String[] args) {
	
	LinkedList list = new LinkedList();
	
        list.add(new Integer(1));
        list.add(new Integer(2));
        list.add(new Integer(3));
        list.add(new Integer(4));
	
	for ( Iterator it = list.iterator(); it.hasNext(); )
	    System.out.print(it.next()+" ");
	
	list.remove(new Integer(2));
	System.out.println();

	for ( Iterator it = list.iterator(); it.hasNext(); )
	    System.out.print(it.next()+" ");
	System.out.println();
    }
}