2.11BSD/src/share/learn/editor/L18.3a

#print
Since 'i' is the same as 'a' except for the position
of the inserted material, what character must end
every block of lines inserted with the 'i' command?
Type "answer X" where X is that character.
#copyin
#user
#uncopyin
#match .
#log
#next
18.3b 5
18.2c 10