2.9BSD/usr/lib/learn/files/L9.2c

#print
And as an example of the [] operators again,
print all the files in this directory whose
names begin with either 'a' or 'c'.
That will tell you to type either 'yes'
or 'no' - do what it says.
#create a1
Type
#create a2
y
#create b
n
o
#create cxx
e
#create cz23
s
(on one line, please)
#copyin
#user
#uncopyin
#match yes
#log
#next
10.1a 10
10.3a 2