{HEAD ~ The stopper} has {TAIL ~ a first end portion} and a second end portion, the first end portion being fixed to the cover 
has
{ HEAD ~ The stopper } has { TAIL ~ a first end portion } and a second end portion , the first end portion being fixed to the cover
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH