If one of the images is of the outside of a yurt, and the other is of the inside, and there is no snow visible in either of them.
return yurt ;return the  outside of     #1 ;return the  inside of     #1 ;return if  #2 is  in  one image ;return if  #3 is  in  the  other image ;return visible snow ;return images of     #6 ;return number of #7 ;return if  #8 is  equal to zero ;return if  both  #4 and #5 are  true ;return if  both  #9 and #10 are  true
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