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