The gap region is sized such that a user can grasp the exposed portion of floss without contacting {TAIL ~ any part} of {HEAD ~ the floss dispenser} 
The gap region is sized such that a user can grasp the exposed portion of floss without contacting { TAIL ~ any part } of { HEAD ~ the floss dispenser }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD