Upon entering a retail sales store, consumers can exchange {HEAD ~ conventional coupons} for {TAIL ~ exchange system coupons} which are only applicable to the retail sales store entered 
Upon entering a retail sales store , consumers can exchange { HEAD ~ conventional coupons } for { TAIL ~ exchange system coupons } which are only applicable to the retail sales store entered
OTH OTH OTH OTH OTH OTH OTH 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