display all the information for all employees who have the letters D or S in their first name and also arrange the result in descending order by salary.
return employees ;return first names of #1 ;return #1 where #2 has the  letter D ;return #1 where #2 has the  letter S ;return #3 ,  #4 ;return salaries of #5 ;return information of #5 ;return #7 sorted by #6 in  descending order
['select', 'project', 'comparative', 'comparative', 'union', 'project', 'project', 'sort']