#print
Just before the last line of file 'airlines'
in this directory insert the line

twa

and then rewrite the file with w, q, and
type "ready".
#create Ref
american
braniff
continental
delta
eastern
national
pan am
twa
united
#create airlines
american
braniff
continental
delta
eastern
national
pan am
united
#user
#cmp airlines Ref
#log
#next
19.1a 10
19.2a 5