If one pair of pads has visible red tags, and the other pair does not.
return pairs of  pads ;return tags of  #1 ;return #1 where #2 are  red ;return #1 besides  #3 ;return number of #3 ;return number of #4 ;return if  #5 is  equal to one ;return if  #6 is  equal to one ;return if  both  #7 and #8 are  true
['select', 'project', 'comparative', 'discard', 'aggregate', 'aggregate', 'boolean', 'boolean', 'boolean']