l3.1a

<B>Digital的Unix操作系统VAX 4.2源码</B>

#print
The "cat" command prints the contents of one or more files.
In fact, it is named "cat" as an abbreviation
for "concatenate".  To print the files named "dog"
and "mouse" in succession, you could type either
  cat dog
  cat mouse
or just
  cat dog mouse
If you print them with one command,
the contents are printed in sequence with nothing
between them.

How many lines are there in all the files
whose names begin with "b"?  Find out, then type
"answer N" where N is the total number of lines.
#create ben
the file ben has
a total of three
short lines.
#create bernie
this file has
two lines.
#create bruce
only one line here.
#copyin
#user
#uncopyin
#match 6
#log
#next
4.1a  10
4.2a    5
4.3a    2