If one image shows the front and the back of a smartphone and the other shows only the front of a smartphone.
return one image ;return smartphone in  #1 ;return front  of #2 ;return back of #2 ;return number of  #3 ;return number of  #4 ;return if  #5 is at least one ;return if  #6 is at least one ;return if  both  #7 and #8 are true ;return other image ;return smartphone in  #10 ;return front  of #11 ;return back of #11 ;return number of  #12 ;return number of  #13 ;return if  #14 is at least one ;return if  #15 is equal to  zero ;return if  both  #16 and #17 are true ;return if  both  #9 and #18 are true
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