static <T> List<T> sort(List<T> numbers){

        List<T> rights = Lists.newArrayList();

　　  if(numbers.size == 0) {

            return rights;

        }else if(numbers.size() == 1){

            rights.addAll(numbers);

            numbers.clear();

            return rights;

        }

        List<T> lefts = Lists.newArrayList();

        for(T num : numbers){

            if(!rights.contains(num)){

                rights.add(num);

            }else{

                lefts.add(num);

            }

        }

        if(lefts.size > 0){

            rights.addAll(sort(lefts));

            lefts.clear();

        }

        return rights;

    }