If each image contains exactly one flute and nothing else, displayed diagonally.
return flutes ;return #1 that are displayed diagonally ;return images ;return number of  #2 for each  #3 ;return #3 where  #4 is equal to  one ;return number of  #3 ;return number of  #5 ;return if  #6 is equal to  #7 ;return #3 that contains nothing besides  #2 ;return number of  #9 ;return if  #6 is equal to  #10 ;return if  both  #8 and #11 are true
['select', 'filter', 'select', 'group', 'comparative', 'aggregate', 'aggregate', 'boolean', 'discard', 'aggregate', 'boolean', 'boolean']