If there is a thick pencil case and a thin one, both closed.
return pencil cases ;return #1 that is thick ;return #2 that is closed ;return #1 that is thin ;return #4 that is closed ;return number of  #3 ;return number of  #5 ;return if  #6 is equal to  one ;return if  #7 is equal to  one ;return if  both  #8 and #9 are true
['select', 'filter', 'filter', 'filter', 'filter', 'aggregate', 'aggregate', 'boolean', 'boolean', 'boolean']