{HEAD ~ The insert} can include {TAIL ~ a detachable cover} for the back and seat portions alone or for the back, seat and leg portions of the body 
include
{ HEAD ~ The insert } can include { TAIL ~ a detachable cover } for the back and seat portions alone or for the back , seat and leg portions of the body
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH