What is the shape of the only item that doesn't have another item of the same color?
return items ;return colors of #1 ;return number of  #1 for each #2 ;return #2 where #3 is one ;return #1 where #2 is the  same as #4 ;return shape of #5
['select', 'project', 'group', 'comparative', 'comparative', 'project']