// $Id:$
//
// Moritz Kaltenbrunner, mpkalten@ucsc.edu
//

class Lex{

   public static void main(String[] args){
      List A = new List();
      List B = new List();

      for(int i=1; i<=20; i++){
         A.append(i);
         B.prepend(i);
      }
      System.out.println(A);
      System.out.println(B);

      for(A.moveFront(); A.index()>=0; A.moveNext()){
         System.out.print(A.get()+" ");
      }
      System.out.println();
      for(B.moveBack(); B.index()>=0; B.movePrev()){
         System.out.print(B.get()+" ");
      }
      System.out.println();

      List C = A.copy();
      System.out.println(A.equals(B));
      System.out.println(B.equals(C));
      System.out.println(C.equals(A));

      A.moveFront();
      for(int i=0; i<5; i++) A.moveNext(); // at index 5
      A.insertBefore(-1);                  // at index 6
      for(int i=0; i<9; i++) A.moveNext(); // at index 15
      A.insertAfter(-2);
      for(int i=0; i<5; i++) A.movePrev(); // at index 10
      A.delete();
      System.out.println(A);
      System.out.println(A.length());
      A.clear();
      System.out.println(A.length());
   }

}