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