providing {TAIL ~ a plurality} of base sheets each having {HEAD ~ opposed faces} and at least one interior edge surrounding and defining an aperture 
providing { TAIL ~ a plurality } of base sheets each having { HEAD ~ opposed faces } and at least one interior edge surrounding and defining an aperture
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH