{HEAD ~ This inversion} of the bars can be used to cause {TAIL ~ the bars} to penetrate or impale bags of trash 
used to cause
{ HEAD ~ This inversion } of the bars can be used to cause { TAIL ~ the bars } to penetrate or impale bags of trash
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH