question: If one of the instruments shown has metal keyhole covers, and is standing straight up on its end; the other instrument is made of glass that has been painted.
#1 return one instrument 
#2 return keyhole covers 
#3 return #2 that are metal 
#4 return if  #1 has #3 
#5 return end of #1 
#6 return if  #1 is standing straight up on #5 
#7 return if  both  #4 and #6 are true 
#8 return the  other instrument 
#9 return glass 
#10 return #9 that has been painted 
#11 return if  #8 is made of #10 
#12 return if  both  #7 and #11 are true