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