If all shoes face rightward and all shoes are displayed without their matched partner.
return shoes ;return #1 that face rightward ;return matched partner of #2 ;return #2 displayed without #3 ;return number of  #4 ;return number of  #1 ;return if  #5 is equal to  #6
['select', 'filter', 'project', 'filter', 'aggregate', 'aggregate', 'boolean']