import java.util.ArrayList;

/**
   This class models a sentence.
*/
public class Sentence
{
   private ArrayList<String> words;

   /**
      Construct a sentence with a given text.
      @param text the sentence. The text ends in a
      punctuation mark which is not stored.
   */
   public Sentence(String text)
   {
      words = new ArrayList<String>();
      String word = "";
      for(int i = 0; i < text.length(); i++)
      {
         if(text.charAt(i) == ' ' || !(Character.isLetter(text.charAt(i))))
         {
            words.add(word);
            word = "";
         }
         else {word += text.charAt(i);}
      }
   }

   /**
      Get the ith word in the sentence.
      @return the ith word
   */
   public String getWord(int i)
   {
      return words.get(i);
   }

   /**
      Get the number of words in the sentence.
      @return the number of words
   */
   public int getCount()
   {
      return words.size();
   }

   // This method is used for checking your work. Do not modify it

   public static String check(String sent)
   {
      Sentence aSentence = new Sentence(sent);
      return aSentence.getWord(aSentence.getCount() - 1);
   }
}