{HEAD ~ A cap} is provided to cover {TAIL ~ the needle} after the syringe has been used 
is provided to cover
{ HEAD ~ A cap } is provided to cover { TAIL ~ the needle } after the syringe has been used
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH