{HEAD ~ The spool housing} holds {TAIL ~ a spool} of dental floss and dispenses an exposed portion of floss through an output port above the base 
holds
{ HEAD ~ The spool housing } holds { TAIL ~ a spool } of dental floss and dispenses an exposed portion of floss through an output port above the base
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH