The present invention relates to {HEAD ~ the field} of postal handling, processing, and delivery and, more particularly, to detecting contents of {TAIL ~ letters}, flats, packages, or other mail 
The present invention relates to { HEAD ~ the field } of postal handling , processing , and delivery and , more particularly , to detecting contents of { TAIL ~ letters } , flats , packages , or other mail
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH