The characters and {HEAD ~ graphics} transmitted through a data channel are displayed clearly to {TAIL ~ the viewer} by an ingenious technique devised for displaying characters and graphics of a supplementary program 
are displayed clearly to
The characters and { HEAD ~ graphics } transmitted through a data channel are displayed clearly to { TAIL ~ the viewer } by an ingenious technique devised for displaying characters and graphics of a supplementary program
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH