private String sanitizeWord(String word, List<? extends Map.Entry<Pattern, String>> rules) {
    if (Strings.isEmpty(word) || uncountables.contains(word)) return word;

    int len = rules.size();

    while (--len > -1) {
      Map.Entry<Pattern, String> rule = rules.get(len);
      Matcher matcher = rule.getKey().matcher(word);
      if (matcher.find()) {
        return matcher.replaceFirst(rule.getValue());
      }
    }
    return null;
  }
private String sanitizeWord(String word, List<? extends Map.Entry<Pattern, String>> rules)