l2.1a

<B>Digital的Unix操作系统VAX 4.2源码</B>

#print
Now to check that you can type, a line will
be typed at you: type it back in, and then type "ready".
Type the line exactly as it is typed at you, including
the colons that bracket it.

: pack my box with five dozen liquor jugs :
#copyin
#user
#uncopyin
#match : pack my box with five dozen liquor jugs :
#log
#next
2.2a 4
3.1a 10