Show the output of the following program:

import ch06. lists.*;

public class ListExer2 {

public static void main(String[ ] args )

{

ListInterface list1 = new RefUnsortedList ( ) ; list1.add( " apple " ) ; list1.add( " peach" ) ; list1.add( " orange " ) ; list1.add( " pear " ) ; list1.remove ( " peach " ) ;

ListInterface list2 = new RefSortedList ( ) ; list2.add( " appl e " ) ; list2.add( " peach " ) ; list2.add( " orange " ) ; list2.add( " pear " ) ; list2.remove ( " peach " ) ;

System.out.print ( " Unsorted " ) ; System.out.println( list1) ; System.out.print ( " Sorted " ) ; System.out.println( list2) ; } }