What is the shape of the item that is brown rubber, but not a cube?
return items ;return #1 that  are brown ;return #1 that  are rubber ;return #1 in  both  #2 and #3 ;return #4 that  are cubes ;return #4 besides #5 ;return the  shape of #6
['select', 'filter', 'filter', 'intersection', 'filter', 'discard', 'project']