content: package org.apache.lucene.analysis.br;
  
  /**
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  /**
   * A stemmer for Brazilian Portuguese words.
   */
  public class BrazilianStemmer {
  
  	/**
  	 * Changed term
  	 */
  	private   String TERM ;
  	private   String CT ;
  	private   String R1 ;
  	private   String R2 ;
  	private   String RV ;
  
  
  	public BrazilianStemmer() {
  	}
  
  	/**
  	 * Stems the given term to an unique <tt>discriminator</tt>.
  	 *
  	 * @param term  The term that should be stemmed.
  	 * @return      Discriminator for <tt>term</tt>
  	 */
  	protected String stem( String term ) {
      boolean altered = false ; // altered the term
  
      // creates CT
      createCT(term) ;
  
  		if ( !isIndexable( CT ) ) {
  			return null;
  		}
  		if ( !isStemmable( CT ) ) {
  			return CT ;
  		}
  
      R1 = getR1(CT) ;
      R2 = getR1(R1) ;
      RV = getRV(CT) ;
      TERM = term + ";" +CT ;
  
      altered = step1() ;
      if (!altered) {
        altered = step2() ;
      }
  
      if (altered) {
        step3();
      } else {
        step4();
      }
  
      step5() ;
  
      return CT ;
  	}
  
  	/**
  	 * Checks a term if it can be processed correctly.
  	 *
  	 * @return  true if, and only if, the given term consists in letters.
  	 */
  	private boolean isStemmable( String term ) {
  		for ( int c = 0; c < term.length(); c++ ) {
  			// Discard terms that contain non-letter characters.
  			if ( !Character.isLetter(term.charAt(c))) {
  				return false;
  			}
  		}
  		return true;
  	}
  
  	/**
  	 * Checks a term if it can be processed indexed.
  	 *
  	 * @return  true if it can be indexed
  	 */
  	private boolean isIndexable( String term ) {
  		return (term.length() < 30) && (term.length() > 2) ;
  	}
  
  	/**
  	 * See if string is 'a','e','i','o','u'
     *
     * @return true if is vowel
  	 */
  	private boolean isVowel( char value ) {
      return (value == 'a') ||
             (value == 'e') ||
             (value == 'i') ||
             (value == 'o') ||
             (value == 'u') ;
    }
  
  	/**
  	 * Gets R1
     *
     * R1 - is the region after the first non-vowel following a vowel,
     *      or is the null region at the end of the word if there is
     *      no such non-vowel.
     *
     * @return null or a string representing R1
  	 */
  	private String getR1( String value ) {
      int     i;
      int     j;
  
      // be-safe !!!
      if (value == null) {
        return null ;
      }
  
      // find 1st vowel
      i = value.length()-1 ;
      for (j=0 ; j < i ; j++) {
        if (isVowel(value.charAt(j))) {
          break ;
        }
      }
  
      if (!(j < i)) {
        return null ;
      }
  
      // find 1st non-vowel
      for ( ; j < i ; j++) {
        if (!(isVowel(value.charAt(j)))) {
          break ;
        }
      }
  
      if (!(j < i)) {
        return null ;
      }
  
      return value.substring(j+1) ;
    }
  
  	/**
  	 * Gets RV
     *
     * RV - IF the second letter is a consonant, RV is the region after
     *      the next following vowel,
     *
     *      OR if the first two letters are vowels, RV is the region
     *      after the next consonant,
     *
     *      AND otherwise (consonant-vowel case) RV is the region after
     *      the third letter.
     *
     *      BUT RV is the end of the word if this positions cannot be
     *      found.
     *
     * @return null or a string representing RV
  	 */
  	private String getRV( String value ) {
      int     i;
      int     j;
  
      // be-safe !!!
      if (value == null) {
        return null ;
      }
  
      i = value.length()-1 ;
  
      // RV - IF the second letter is a consonant, RV is the region after
      //      the next following vowel,
      if ((i > 0) && !isVowel(value.charAt(1))) {
        // find 1st vowel
        for (j=2 ; j < i ; j++) {
          if (isVowel(value.charAt(j))) {
            break ;
          }
        }
  
        if (j < i) {
          return value.substring(j+1) ;
        }
      }
  
  
      // RV - OR if the first two letters are vowels, RV is the region
      //      after the next consonant,
      if ((i > 1) &&
          isVowel(value.charAt(0)) &&
          isVowel(value.charAt(1))) {
        // find 1st consoant
        for (j=2 ; j < i ; j++) {
          if (!isVowel(value.charAt(j))) {
            break ;
          }
        }
  
        if (j < i) {
          return value.substring(j+1) ;
        }
      }
  
      // RV - AND otherwise (consonant-vowel case) RV is the region after
      //      the third letter.
      if (i > 2) {
        return value.substring(3) ;
      }
  
      return null ;
    }
  
  	/**
     * 1) Turn to lowercase
     * 2) Remove accents
     * 3) ã -> a ; õ -> o
     * 4) ç -> c
     *
     * @return null or a string transformed
  	 */
  	private String changeTerm( String value ) {
      int     j;
      String  r = "" ;
  
      // be-safe !!!
      if (value == null) {
        return null ;
      }
  
      value = value.toLowerCase() ;
      for (j=0 ; j < value.length() ; j++) {
        if ((value.charAt(j) == 'á') ||
            (value.charAt(j) == 'â') ||
            (value.charAt(j) == 'ã')) {
          r= r + "a" ; continue ;
        }
        if ((value.charAt(j) == 'é') ||
            (value.charAt(j) == 'ê')) {
          r= r + "e" ; continue ;
        }
        if (value.charAt(j) == 'í') {
          r= r + "i" ; continue ;
        }
        if ((value.charAt(j) == 'ó') ||
            (value.charAt(j) == 'ô') ||
            (value.charAt(j) == 'õ')) {
          r= r + "o" ; continue ;
        }
        if ((value.charAt(j) == 'ú') ||
            (value.charAt(j) == 'ü')) {
          r= r + "u" ; continue ;
        }
        if (value.charAt(j) == 'ç') {
          r= r + "c" ; continue ;
        }
        if (value.charAt(j) == 'ñ') {
          r= r + "n" ; continue ;
        }
  
        r= r+ value.charAt(j) ;
      }
  
      return r ;
    }
  
  	/**
     * Check if a string ends with a suffix
     *
     * @return true if the string ends with the specified suffix
  	 */
  	private boolean suffix( String value, String suffix ) {
  
      // be-safe !!!
      if ((value == null) || (suffix == null)) {
        return false ;
      }
  
      if (suffix.length() > value.length()) {
        return false ;
      }
  
      return value.substring(value.length()-suffix.length()).equals(suffix);
    }
  
  	/**
     * Replace a string suffix by another
     *
     * @return the replaced String
  	 */
  	private String replaceSuffix( String value, String toReplace, String changeTo ) {
      String vvalue ;
  
      // be-safe !!!
      if ((value == null) ||
          (toReplace == null) ||
          (changeTo == null) ) {
        return value ;
      }
  
      vvalue = removeSuffix(value,toReplace) ;
  
      if (value.equals(vvalue)) {
        return value ;
      } else {
        return vvalue + changeTo ;
      }
    }
  
  	/**
     * Remove a string suffix
     *
     * @return the String without the suffix
  	 */
  	private String removeSuffix( String value, String toRemove ) {
      // be-safe !!!
      if ((value == null) ||
          (toRemove == null) ||
          !suffix(value,toRemove) ) {
        return value ;
      }
  
      return value.substring(0,value.length()-toRemove.length()) ;
    }
  
  	/**
     * See if a suffix is preceded by a String
     *
     * @return true if the suffix is preceded
  	 */
  	private boolean suffixPreceded( String value, String suffix, String preceded ) {
      // be-safe !!!
      if ((value == null) ||
          (suffix == null) ||
          (preceded == null) ||
          !suffix(value,suffix) ) {
        return false ;
      }
  
      return suffix(removeSuffix(value,suffix),preceded) ;
    }
  
  	/**
  	 * Creates CT (changed term) , substituting * 'ã' and 'õ' for 'a~' and 'o~'.
  	 */
  	private void createCT( String term ) {
      CT = changeTerm(term) ;
  
      if (CT.length() < 2) return ;
  
      // if the first character is ... , remove it
      if ((CT.charAt(0) == '"')  ||
          (CT.charAt(0) == '\'') ||
          (CT.charAt(0) == '-')  ||
          (CT.charAt(0) == ',')  ||
          (CT.charAt(0) == ';')  ||
          (CT.charAt(0) == '.')  ||
          (CT.charAt(0) == '?')  ||
          (CT.charAt(0) == '!')
          ) {
          CT = CT.substring(1);
      }
  
      if (CT.length() < 2) return ;
  
      // if the last character is ... , remove it
      if ((CT.charAt(CT.length()-1) == '-') ||
          (CT.charAt(CT.length()-1) == ',') ||
          (CT.charAt(CT.length()-1) == ';') ||
          (CT.charAt(CT.length()-1) == '.') ||
          (CT.charAt(CT.length()-1) == '?') ||
          (CT.charAt(CT.length()-1) == '!') ||
          (CT.charAt(CT.length()-1) == '\'') ||
          (CT.charAt(CT.length()-1) == '"')
          ) {
          CT = CT.substring(0,CT.length()-1);
      }
    }
  
  
  	/**
  	 * Standard suffix removal.
     * Search for the longest among the following suffixes, and perform
     * the following actions:
     *
     * @return false if no ending was removed
  	 */
  	private boolean step1() {
      if (CT == null) return false ;
  
      // suffix length = 7
      if (suffix(CT,"uciones") && suffix(R2,"uciones")) {
          CT = replaceSuffix(CT,"uciones","u") ; return true;
      }
  
      // suffix length = 6
      if (CT.length() >= 6) {
        if (suffix(CT,"imentos") && suffix(R2,"imentos")) {
            CT = removeSuffix(CT,"imentos") ; return true;
        }
        if (suffix(CT,"amentos") && suffix(R2,"amentos")) {
            CT = removeSuffix(CT,"amentos") ; return true;
        }
        if (suffix(CT,"adores") && suffix(R2,"adores")) {
            CT = removeSuffix(CT,"adores") ; return true;
        }
        if (suffix(CT,"adoras") && suffix(R2,"adoras")) {
            CT = removeSuffix(CT,"adoras") ; return true;
        }
        if (suffix(CT,"logias") && suffix(R2,"logias")) {
            replaceSuffix(CT,"logias","log") ; return true;
        }
        if (suffix(CT,"encias") && suffix(R2,"encias")) {
            CT = replaceSuffix(CT,"encias","ente") ; return true;
        }
        if (suffix(CT,"amente") && suffix(R1,"amente")) {
            CT = removeSuffix(CT,"amente") ; return true;
        }
        if (suffix(CT,"idades") && suffix(R2,"idades")) {
            CT = removeSuffix(CT,"idades") ; return true;
        }
      }
  
      // suffix length = 5
      if (CT.length() >= 5) {
        if (suffix(CT,"acoes") && suffix(R2,"acoes")) {
            CT = removeSuffix(CT,"acoes") ; return true;
        }
        if (suffix(CT,"imento") && suffix(R2,"imento")) {
            CT = removeSuffix(CT,"imento") ; return true;
        }
        if (suffix(CT,"amento") && suffix(R2,"amento")) {
            CT = removeSuffix(CT,"amento") ; return true;
        }
        if (suffix(CT,"adora") && suffix(R2,"adora")) {
            CT = removeSuffix(CT,"adora") ; return true;
        }
        if (suffix(CT,"ismos") && suffix(R2,"ismos")) {
            CT = removeSuffix(CT,"ismos") ; return true;
        }
        if (suffix(CT,"istas") && suffix(R2,"istas")) {
            CT = removeSuffix(CT,"istas") ; return true;
        }
        if (suffix(CT,"logia") && suffix(R2,"logia")) {
            CT = replaceSuffix(CT,"logia","log") ; return true;
        }
        if (suffix(CT,"ucion") && suffix(R2,"ucion")) {
            CT = replaceSuffix(CT,"ucion","u") ; return true;
        }
        if (suffix(CT,"encia") && suffix(R2,"encia")) {
            CT = replaceSuffix(CT,"encia","ente") ; return true;
        }
        if (suffix(CT,"mente") && suffix(R2,"mente")) {
            CT = removeSuffix(CT,"mente") ; return true;
        }
        if (suffix(CT,"idade") && suffix(R2,"idade")) {
            CT = removeSuffix(CT,"idade") ; return true;
        }
      }
  
      // suffix length = 4
      if (CT.length() >= 4) {
        if (suffix(CT,"acao") && suffix(R2,"acao")) {
            CT = removeSuffix(CT,"acao") ; return true;
        }
        if (suffix(CT,"ezas") && suffix(R2,"ezas")) {
            CT = removeSuffix(CT,"ezas") ; return true;
        }
        if (suffix(CT,"icos") && suffix(R2,"icos")) {
            CT = removeSuffix(CT,"icos") ; return true ;
        }
        if (suffix(CT,"icas") && suffix(R2,"icas")) {
            CT = removeSuffix(CT,"icas") ; return true ;
        }
        if (suffix(CT,"ismo") && suffix(R2,"ismo")) {
            CT = removeSuffix(CT,"ismo") ; return true ;
        }
        if (suffix(CT,"avel") && suffix(R2,"avel")) {
            CT = removeSuffix(CT,"avel") ; return true ;
        }
        if (suffix(CT,"ivel") && suffix(R2,"ivel")) {
            CT = removeSuffix(CT,"ivel") ; return true ;
        }
        if (suffix(CT,"ista") && suffix(R2,"ista")) {
            CT = removeSuffix(CT,"ista") ; return true ;
        }
        if (suffix(CT,"osos") && suffix(R2,"osos")) {
            CT = removeSuffix(CT,"osos") ; return true ;
        }
        if (suffix(CT,"osas") && suffix(R2,"osas")) {
            CT = removeSuffix(CT,"osas") ; return true ;
        }
        if (suffix(CT,"ador") && suffix(R2,"ador")) {
            CT = removeSuffix(CT,"ador") ; return true ;
        }
        if (suffix(CT,"ivas") && suffix(R2,"ivas")) {
            CT = removeSuffix(CT,"ivas") ; return true ;
        }
        if (suffix(CT,"ivos") && suffix(R2,"ivos")) {
            CT = removeSuffix(CT,"ivos") ; return true ;
        }
        if (suffix(CT,"iras") &&
            suffix(RV,"iras") &&
            suffixPreceded(CT,"iras","e")) {
            CT = replaceSuffix(CT,"iras","ir") ; return true ;
        }
      }
  
      // suffix length = 3
      if (CT.length() >= 3) {
        if (suffix(CT,"eza") && suffix(R2,"eza")) {
            CT = removeSuffix(CT,"eza") ; return true ;
        }
        if (suffix(CT,"ico") && suffix(R2,"ico")) {
            CT = removeSuffix(CT,"ico") ; return true ;
        }
        if (suffix(CT,"ica") && suffix(R2,"ica")) {
            CT = removeSuffix(CT,"ica") ; return true ;
        }
        if (suffix(CT,"oso") && suffix(R2,"oso")) {
            CT = removeSuffix(CT,"oso") ; return true ;
        }
        if (suffix(CT,"osa") && suffix(R2,"osa")) {
            CT = removeSuffix(CT,"osa") ; return true ;
        }
        if (suffix(CT,"iva") && suffix(R2,"iva")) {
            CT = removeSuffix(CT,"iva") ; return true ;
        }
        if (suffix(CT,"ivo") && suffix(R2,"ivo")) {
            CT = removeSuffix(CT,"ivo") ; return true ;
        }
        if (suffix(CT,"ira") &&
            suffix(RV,"ira") &&
            suffixPreceded(CT,"ira","e")) {
            CT = replaceSuffix(CT,"ira","ir") ; return true ;
        }
      }
  
      // no ending was removed by step1
      return false ;
    }
  
  
  	/**
  	 * Verb suffixes.
     *
     * Search for the longest among the following suffixes in RV,
     * and if found, delete.
     *
     * @return false if no ending was removed
  	*/
  	private boolean step2() {
      if (RV == null) return false ;
  
      // suffix lenght = 7
      if (RV.length() >= 7) {
        if (suffix(RV,"issemos")) {
          CT = removeSuffix(CT,"issemos") ; return true;
        }
        if (suffix(RV,"essemos")) {
          CT = removeSuffix(CT,"essemos") ; return true;
        }
        if (suffix(RV,"assemos")) {
          CT = removeSuffix(CT,"assemos") ; return true;
        }
        if (suffix(RV,"ariamos")) {
          CT = removeSuffix(CT,"ariamos") ; return true;
        }
        if (suffix(RV,"eriamos")) {
          CT = removeSuffix(CT,"eriamos") ; return true;
        }
        if (suffix(RV,"iriamos")) {
          CT = removeSuffix(CT,"iriamos") ; return true;
        }
      }
  
      // suffix length = 6
      if (RV.length() >= 6) {
        if (suffix(RV,"iremos")) {
          CT = removeSuffix(CT,"iremos") ; return true;
        }
        if (suffix(RV,"eremos")) {
          CT = removeSuffix(CT,"eremos") ; return true;
        }
        if (suffix(RV,"aremos")) {
          CT = removeSuffix(CT,"aremos") ; return true;
        }
        if (suffix(RV,"avamos")) {
          CT = removeSuffix(CT,"avamos") ; return true;
        }
        if (suffix(RV,"iramos")) {
          CT = removeSuffix(CT,"iramos") ; return true;
        }
        if (suffix(RV,"eramos")) {
          CT = removeSuffix(CT,"eramos") ; return true;
        }
        if (suffix(RV,"aramos")) {
          CT = removeSuffix(CT,"aramos") ; return true;
        }
        if (suffix(RV,"asseis")) {
          CT = removeSuffix(CT,"asseis") ; return true;
        }
        if (suffix(RV,"esseis")) {
          CT = removeSuffix(CT,"esseis") ; return true;
        }
        if (suffix(RV,"isseis")) {
          CT = removeSuffix(CT,"isseis") ; return true;
        }
        if (suffix(RV,"arieis")) {
          CT = removeSuffix(CT,"arieis") ; return true;
        }
        if (suffix(RV,"erieis")) {
          CT = removeSuffix(CT,"erieis") ; return true;
        }
        if (suffix(RV,"irieis")) {
          CT = removeSuffix(CT,"irieis") ; return true;
        }
      }
  
  
      // suffix length = 5
      if (RV.length() >= 5) {
        if (suffix(RV,"irmos")) {
          CT = removeSuffix(CT,"irmos") ; return true;
        }
        if (suffix(RV,"iamos")) {
          CT = removeSuffix(CT,"iamos") ; return true;
        }
        if (suffix(RV,"armos")) {
          CT = removeSuffix(CT,"armos") ; return true;
        }
        if (suffix(RV,"ermos")) {
          CT = removeSuffix(CT,"ermos") ; return true;
        }
        if (suffix(RV,"areis")) {
          CT = removeSuffix(CT,"areis") ; return true;
        }
        if (suffix(RV,"ereis")) {
          CT = removeSuffix(CT,"ereis") ; return true;
        }
        if (suffix(RV,"ireis")) {
          CT = removeSuffix(CT,"ireis") ; return true;
        }
        if (suffix(RV,"asses")) {
          CT = removeSuffix(CT,"asses") ; return true;
        }
        if (suffix(RV,"esses")) {
          CT = removeSuffix(CT,"esses") ; return true;
        }
        if (suffix(RV,"isses")) {
          CT = removeSuffix(CT,"isses") ; return true;
        }
        if (suffix(RV,"astes")) {
          CT = removeSuffix(CT,"astes") ; return true;
        }
        if (suffix(RV,"assem")) {
          CT = removeSuffix(CT,"assem") ; return true;
        }
        if (suffix(RV,"essem")) {
          CT = removeSuffix(CT,"essem") ; return true;
        }
        if (suffix(RV,"issem")) {
          CT = removeSuffix(CT,"issem") ; return true;
        }
        if (suffix(RV,"ardes")) {
          CT = removeSuffix(CT,"ardes") ; return true;
        }
        if (suffix(RV,"erdes")) {
          CT = removeSuffix(CT,"erdes") ; return true;
        }
        if (suffix(RV,"irdes")) {
          CT = removeSuffix(CT,"irdes") ; return true;
        }
        if (suffix(RV,"ariam")) {
          CT = removeSuffix(CT,"ariam") ; return true;
        }
        if (suffix(RV,"eriam")) {
          CT = removeSuffix(CT,"eriam") ; return true;
        }
        if (suffix(RV,"iriam")) {
          CT = removeSuffix(CT,"iriam") ; return true;
        }
        if (suffix(RV,"arias")) {
          CT = removeSuffix(CT,"arias") ; return true;
        }
        if (suffix(RV,"erias")) {
          CT = removeSuffix(CT,"erias") ; return true;
        }
        if (suffix(RV,"irias")) {
          CT = removeSuffix(CT,"irias") ; return true;
        }
        if (suffix(RV,"estes")) {
          CT = removeSuffix(CT,"estes") ; return true;
        }
        if (suffix(RV,"istes")) {
          CT = removeSuffix(CT,"istes") ; return true;
        }
        if (suffix(RV,"areis")) {
          CT = removeSuffix(CT,"areis") ; return true;
        }
        if (suffix(RV,"aveis")) {
          CT = removeSuffix(CT,"aveis") ; return true;
        }
      }
  
      // suffix length = 4
      if (RV.length() >= 4) {
        if (suffix(RV,"aria")) {
          CT = removeSuffix(CT,"aria") ; return true;
        }
        if (suffix(RV,"eria")) {
          CT = removeSuffix(CT,"eria") ; return true;
        }
        if (suffix(RV,"iria")) {
          CT = removeSuffix(CT,"iria") ; return true;
        }
        if (suffix(RV,"asse")) {
          CT = removeSuffix(CT,"asse") ; return true;
        }
        if (suffix(RV,"esse")) {
          CT = removeSuffix(CT,"esse") ; return true;
        }
        if (suffix(RV,"isse")) {
          CT = removeSuffix(CT,"isse") ; return true;
        }
        if (suffix(RV,"aste")) {
          CT = removeSuffix(CT,"aste") ; return true;
        }
        if (suffix(RV,"este")) {
          CT = removeSuffix(CT,"este") ; return true;
        }
        if (suffix(RV,"iste")) {
          CT = removeSuffix(CT,"iste") ; return true;
        }
        if (suffix(RV,"arei")) {
          CT = removeSuffix(CT,"arei") ; return true;
        }
        if (suffix(RV,"erei")) {
          CT = removeSuffix(CT,"erei") ; return true;
        }
        if (suffix(RV,"irei")) {
          CT = removeSuffix(CT,"irei") ; return true;
        }
        if (suffix(RV,"aram")) {
          CT = removeSuffix(CT,"aram") ; return true;
        }
        if (suffix(RV,"eram")) {
          CT = removeSuffix(CT,"eram") ; return true;
        }
        if (suffix(RV,"iram")) {
          CT = removeSuffix(CT,"iram") ; return true;
        }
        if (suffix(RV,"avam")) {
          CT = removeSuffix(CT,"avam") ; return true;
        }
        if (suffix(RV,"arem")) {
          CT = removeSuffix(CT,"arem") ; return true;
        }
        if (suffix(RV,"erem")) {
          CT = removeSuffix(CT,"erem") ; return true;
        }
        if (suffix(RV,"irem")) {
          CT = removeSuffix(CT,"irem") ; return true;
        }
        if (suffix(RV,"ando")) {
          CT = removeSuffix(CT,"ando") ; return true;
        }
        if (suffix(RV,"endo")) {
          CT = removeSuffix(CT,"endo") ; return true;
        }
        if (suffix(RV,"indo")) {
          CT = removeSuffix(CT,"indo") ; return true;
        }
        if (suffix(RV,"arao")) {
          CT = removeSuffix(CT,"arao") ; return true;
        }
        if (suffix(RV,"erao")) {
          CT = removeSuffix(CT,"erao") ; return true;
        }
        if (suffix(RV,"irao")) {
          CT = removeSuffix(CT,"irao") ; return true;
        }
        if (suffix(RV,"adas")) {
          CT = removeSuffix(CT,"adas") ; return true;
        }
        if (suffix(RV,"idas")) {
          CT = removeSuffix(CT,"idas") ; return true;
        }
        if (suffix(RV,"aras")) {
          CT = removeSuffix(CT,"aras") ; return true;
        }
        if (suffix(RV,"eras")) {
          CT = removeSuffix(CT,"eras") ; return true;
        }
        if (suffix(RV,"iras")) {
          CT = removeSuffix(CT,"iras") ; return true;
        }
        if (suffix(RV,"avas")) {
          CT = removeSuffix(CT,"avas") ; return true;
        }
        if (suffix(RV,"ares")) {
          CT = removeSuffix(CT,"ares") ; return true;
        }
        if (suffix(RV,"eres")) {
          CT = removeSuffix(CT,"eres") ; return true;
        }
        if (suffix(RV,"ires")) {
          CT = removeSuffix(CT,"ires") ; return true;
        }
        if (suffix(RV,"ados")) {
          CT = removeSuffix(CT,"ados") ; return true;
        }
        if (suffix(RV,"idos")) {
          CT = removeSuffix(CT,"idos") ; return true;
        }
        if (suffix(RV,"amos")) {
          CT = removeSuffix(CT,"amos") ; return true;
        }
        if (suffix(RV,"emos")) {
          CT = removeSuffix(CT,"emos") ; return true;
        }
        if (suffix(RV,"imos")) {
          CT = removeSuffix(CT,"imos") ; return true;
        }
        if (suffix(RV,"iras")) {
          CT = removeSuffix(CT,"iras") ; return true;
        }
        if (suffix(RV,"ieis")) {
          CT = removeSuffix(CT,"ieis") ; return true;
        }
      }
  
      // suffix length = 3
      if (RV.length() >= 3) {
        if (suffix(RV,"ada")) {
          CT = removeSuffix(CT,"ada") ; return true;
        }
        if (suffix(RV,"ida")) {
          CT = removeSuffix(CT,"ida") ; return true;
        }
        if (suffix(RV,"ara")) {
          CT = removeSuffix(CT,"ara") ; return true;
        }
        if (suffix(RV,"era")) {
          CT = removeSuffix(CT,"era") ; return true;
        }
        if (suffix(RV,"ira")) {
          CT = removeSuffix(CT,"ava") ; return true;
        }
        if (suffix(RV,"iam")) {
          CT = removeSuffix(CT,"iam") ; return true;
        }
        if (suffix(RV,"ado")) {
          CT = removeSuffix(CT,"ado") ; return true;
        }
        if (suffix(RV,"ido")) {
          CT = removeSuffix(CT,"ido") ; return true;
        }
        if (suffix(RV,"ias")) {
          CT = removeSuffix(CT,"ias") ; return true;
        }
        if (suffix(RV,"ais")) {
          CT = removeSuffix(CT,"ais") ; return true;
        }
        if (suffix(RV,"eis")) {
          CT = removeSuffix(CT,"eis") ; return true;
        }
        if (suffix(RV,"ira")) {
          CT = removeSuffix(CT,"ira") ; return true;
        }
        if (suffix(RV,"ear")) {
          CT = removeSuffix(CT,"ear") ; return true;
        }
      }
  
      // suffix length = 2
      if (RV.length() >= 2) {
        if (suffix(RV,"ia")) {
          CT = removeSuffix(CT,"ia") ; return true;
        }
        if (suffix(RV,"ei")) {
          CT = removeSuffix(CT,"ei") ; return true;
        }
        if (suffix(RV,"am")) {
          CT = removeSuffix(CT,"am") ; return true;
        }
        if (suffix(RV,"em")) {
          CT = removeSuffix(CT,"em") ; return true;
        }
        if (suffix(RV,"ar")) {
          CT = removeSuffix(CT,"ar") ; return true;
        }
        if (suffix(RV,"er")) {
          CT = removeSuffix(CT,"er") ; return true;
        }
        if (suffix(RV,"ir")) {
          CT = removeSuffix(CT,"ir") ; return true;
        }
        if (suffix(RV,"as")) {
          CT = removeSuffix(CT,"as") ; return true;
        }
        if (suffix(RV,"es")) {
          CT = removeSuffix(CT,"es") ; return true;
        }
        if (suffix(RV,"is")) {
          CT = removeSuffix(CT,"is") ; return true;
        }
        if (suffix(RV,"eu")) {
          CT = removeSuffix(CT,"eu") ; return true;
        }
        if (suffix(RV,"iu")) {
          CT = removeSuffix(CT,"iu") ; return true;
        }
        if (suffix(RV,"iu")) {
          CT = removeSuffix(CT,"iu") ; return true;
        }
        if (suffix(RV,"ou")) {
          CT = removeSuffix(CT,"ou") ; return true;
        }
      }
  
      // no ending was removed by step2
      return false ;
    }
  
  	/**
  	 * Delete suffix 'i' if in RV and preceded by 'c'
     *
  	*/
  	private void step3() {
      if (RV == null) return ;
  
      if (suffix(RV,"i") && suffixPreceded(RV,"i","c")) {
        CT = removeSuffix(CT,"i") ;
      }
  
    }
  
  	/**
  	 * Residual suffix
     *
     * If the word ends with one of the suffixes (os a i o á í ó)
     * in RV, delete it
     *
  	*/
  	private void step4() {
      if (RV == null) return  ;
  
      if (suffix(RV,"os")) {
        CT = removeSuffix(CT,"os") ; return ;
      }
      if (suffix(RV,"a")) {
        CT = removeSuffix(CT,"a") ; return ;
      }
      if (suffix(RV,"i")) {
        CT = removeSuffix(CT,"i") ; return ;
      }
      if (suffix(RV,"o")) {
        CT = removeSuffix(CT,"o") ; return ;
      }
  
    }
  
  	/**
  	 * If the word ends with one of ( e é ê) in RV,delete it,
     * and if preceded by 'gu' (or 'ci') with the 'u' (or 'i') in RV,
     * delete the 'u' (or 'i')
     *
     * Or if the word ends ç remove the cedilha
     *
  	*/
  	private void step5() {
      if (RV == null) return  ;
  
      if (suffix(RV,"e")) {
        if (suffixPreceded(RV,"e","gu")) {
          CT = removeSuffix(CT,"e") ;
          CT = removeSuffix(CT,"u") ;
          return ;
        }
  
        if (suffixPreceded(RV,"e","ci")) {
          CT = removeSuffix(CT,"e") ;
          CT = removeSuffix(CT,"i") ;
          return ;
        }
  
        CT = removeSuffix(CT,"e") ; return ;
      }
    }
  
  	/**
  	 * For log and debug purpose
  	 *
  	 * @return  TERM, CT, RV, R1 and R2
  	 */
  	public String log() {
      return " (TERM = " + TERM + ")" +
             " (CT = " + CT +")" +
             " (RV = " + RV +")" +
             " (R1 = " + R1 +")" +
             " (R2 = " + R2 +")" ;
  	}
  
  }
  
  