If all drums are the same height and are displayed at the same angle, and at least one drum has an oval label centered on the side facing the camera.
return drums ;return height of #1 ;return #1 where  #2 is the  same ;return angle displayed at of #1 ;return #1 where  #4 is the  same ;return #1 in  both  #3 and #5 ;return number of  #6 ;return number of  #1 ;return if  #7 is equal to  #8 ;return label ;return #10 that is an oval ;return side of #1 ;return #12 that is facing the  camera ;return #1 where  #13 has #11 centered on ;return number of  #14 ;return if  #15 is at least one ;return if  both  #9 and #16 are true
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