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