public static String superReducedString(String s) {
        List<Character> chList = s.chars()
                               .mapToObj(c -> (char) c) 
                               .collect(Collectors.toList());
        int index = 0;
        while (index < chList.size() - 1) {
            if (chList.get(index).equals(chList.get(index + 1))) {
                chList.remove(index); 
                chList.remove(index);
                if (index > 0) index--;
            } else index++;
        }
        
        String result = chList.stream()
            .map(e -> e.toString()).collect(Collectors.joining());
        return result.length() > 0 ? result : "Empty String";
    }