Which city has the least number of customers whose type code is "Good Credit Rating"?
return cities ;return customers of #1 ;return type codes of #2 ;return #2 where #3 is  Good Credit Rating ;return the  number of  #4 for each #1 ;return #1 where #5 is  the  lowest
['select', 'project', 'project', 'comparative', 'group', 'comparative']