If the buses in the left and right images are displayed horizontally and back-to-back.
return left image ;return buses in  #1 ;return #2 that are displayed horizontally ;return if  #3 are displayed back-to-back ;return right image ;return buses in  #5 ;return #6 that are displayed horizontally ;return if  #7 are displayed back-to-back ;return if  both  #4 and #8 are true
['select', 'project', 'filter', 'boolean', 'select', 'project', 'filter', 'boolean', 'boolean']