The devices include {HEAD ~ a plurality} of {TAIL ~ electronic shelf labels} 202A . . . 202N and a plurality of RFID tags 204A . . . 204N 
of
The devices include { HEAD ~ a plurality } of { TAIL ~ electronic shelf labels } 202A . . . 202N and a plurality of RFID tags 204A . . . 204N
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH