If each image shows exactly one hound on green grass, and one image shows a brown-eared hound while the other shows a black-eared hound.
return images ;return hounds in  #1 ;return grass in  #1 ;return #3 that is green ;return #2 on #4 ;return number of  #5 for each  #1 ;return #1 where  #6 is equal to  one ;return number of  #7 ;return number of  #1 ;return if  #8 is equal to  #9 ;return one image  ;return hound   in  #11 ;return if  #12 is brown-eared ;return the  other image  ;return hound   in  #14 ;return if  #15 is black-eared ;return if  both  #13 and #16 are true ;return if  both  #10 and #17 are true
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