If two leather binders are shown, one closed and the other open flat, showing its interior layout.
return binders ;return #1 that are leather ;return number of  #2 ;return if  #3 is equal to  two ;return #2 that is closed ;return number of  #5 ;return if  #6 is equal to  one ;return #2 that is open flat ;return #8 that is showing its interior layout ;return number of  #9 ;return if  #10 is equal to  one ;return if  both  #4 and #7 are true ;return if  both  #12 and #11 are true
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