If exactly two ring binder notebooks with plastic cover, each a different color, are standing on end, at least one of them empty.
return ring binder notebooks ;return cover of #1 ;return #1 where  #2 is plastic ;return color of #3 ;return #3 where  #4 are different ;return end of #5 ;return #5 that are standing on #6 ;return number of  #7 ;return if  #8 is equal to  two ;return #7 that is empty ;return number of  #10 ;return if  #11 is at least one ;return if  both  #9 and #12 are true
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