When {TAIL ~ the editor} receives {HEAD ~ the output}, it stores the output in a file and displays it on a computer monitor 
When { TAIL ~ the editor } receives { HEAD ~ the output } , it stores the output in a file and displays it on a computer monitor
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH