Return the city with the customer type code "Good Credit Rating" that had the fewest customers.
return cities ;return customer type codes of  #1 ;return #1 where  #2 is Good Credit Rating ;return customers of  #3 ;return number of  #4 for each  #1 ;return #1 where  #5 is lowest
['select', 'project', 'comparative', 'project', 'group', 'superlative']