List<String> lookup(String s){
        List<String> list = new ArrayList<>();
        int a =0;
        for(int i =0;i<all.size();i++)
            if (all.get(i).codeword.equals(s)) {
                list = all.get(i).definitions;
                list.sort(Comparator.naturalOrder());
                a=1; i=all.size();
        }
        if (a==0)
            throw new NoSuchElementException("No Such Element");
        return list;
    }