how many cylinders are not gray or green?
return cylinders ;return #1 that  are gray ;return #1 that  are green ;return #1 besides #2 ;return #1 besides #3 ;return #1 in both #4 and  #5 ;return number of #6
['select', 'filter', 'filter', 'discard', 'discard', 'intersection', 'aggregate']