The scanner 10 scans and decodes {TAIL ~ a conventional bar code} 12 printed onto {HEAD ~ a suitable label} 14 
The scanner 10 scans and decodes { TAIL ~ a conventional bar code } 12 printed onto { HEAD ~ a suitable label } 14
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH