/**
 ******************************************************************************
 *                    HOMEWORK:  15-121
 ******************************************************************************
 *                    Text concordance program
 ******************************************************************************
 *
 * A word is a sequence of two or more letters [a..zA..Z], digits [0..9]
 * and the undescore charatcter separated by non-letters.
 * We DO distinguish between upper- and lower-case letters.
 * This feature is supported by passing in a special comparator object.
 *
 * Notice, we do not include words consisting of a single letter.
 *
 * Because words can occur multiple times in a document, you have
 * to be able to keep track of the locations and occurrences of all words.
 *
 * The index of a word is simply the position of the word in the text.
 *
 * The frequency of a word is the number of occurences of the word in the text.
 *
 *
 *
 * @author
 * @date
 *****************************************************************************/
 /*****************************************************************************

                         IMPLEMENT THIS CLASS

 *****************************************************************************/

import java.util.*;

public class Word implements Comparable<Word>
{
	private String word;
	private Set<Integer> index; //word's line number in the source text
	private int frequency;     //counts occurences of the word



}