public class MyLLAnswers {
   MyNode head;


/* FROM HERE - FROM HERE - FROM HERE - FROM HERE - FROM HERE */


   public boolean twoInARow() {
      MyNode nd = head;
      if (head == null) return false;
      while (nd.getNext() != null) {
         if (nd.getLetter() == nd.getNext().getLetter())
            return true;
         nd=nd.getNext();
      }
      return false;
   }

   public boolean isWord(String str) {
      String s="";
      for (MyNode nd=head; nd!=null; nd=nd.getNext())
         s += nd.getLetter();
      if (s.equals(str))
         return true;
      else
         return false;
   }

   public void deleteLast() {
      MyNode nd = head;
      if (head == null || head.getNext() == null) {
         head = null;
         return;
      }
      while (nd.getNext().getNext() != null)
         nd = nd.getNext();
      nd.setNext(null);
   }


   /* You can use the yourMainMethod method to do any testing you'd
      like to do (none is also allowed). It will be automatically
      called when you run the class without any command line
      parameters.
    */
   public static void yourMainMethod() {
   }


/* TO HERE - TO HERE - TO HERE - TO HERE - TO HERE - TO HERE */


   public MyLLAnswers() {
      head = null;
   }
   public void insert(char c) {
      MyNode nd = new MyNode(c);
      nd.setNext(head); 
      head = nd;
   }
   public String toString() {
      String str="";
      MyNode nd = head;
      while (nd != null) {
         str += nd.getLetter()+" ";
         nd=nd.getNext();
      }
      return str;
   }

   public static void main(String[] args) {
      MyLLAnswers theList = new MyLLAnswers();
      int i,n;

      if (args.length==0)
         yourMainMethod();
      else {
         for (i=0; i<args[0].length(); i++)
            theList.insert(args[0].charAt(i));
         System.out.println(theList);
         System.out.println(theList.twoInARow());
         System.out.println(theList.isWord("hello"));
         System.out.println(theList.isWord("olleh"));
         theList.deleteLast();
         System.out.println(theList);
         System.out.println(theList.isWord(""));
         System.out.println(theList);
         theList.deleteLast();
         System.out.println(theList);
      }
   }
}

class MyNode {
   private char letter;
   private MyNode next;

   public MyNode(char c) {
      letter = c;
      next = null;
   }
   public char getLetter() {
      return letter;
   }
   public MyNode getNext() {
      return next;
   }
   public void setNext(MyNode nd) {
      next = nd;
   }
}