Give the distinct department ids of departments in which a manager is in charge of 4 or more employees?
return departments ;return managers of  #1 ;return employees of  #2 ;return number of #3 for each #2 ;return #1 where  #4 is  4 or  more ;return department ids of  #5 ;return distinct #6
['select', 'project', 'project', 'group', 'comparative', 'project', 'project']