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