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#print
Sometimes ? is too flexible, and you
only want to allow a few characters. For example,
you might want to abbreviate
ls memo.ab memo.ac
without picking up "memo.ad", "memo.ae", and so forth.
You can match one of a set of particular characters by
putting them in brackets "[]" in the list you use with "ls".
For example,
[bc]
matches either b or c but no other letters. Thus
ls memo.a[bc]
will list exactly "memo.ab" and "memo.ac" if present.
How many of the files
xya, xyb, xyc, xyd
exist in this directory?
Type "answer N" where N is the number.
#create xyb
#create xyc
#create xye
#create xyf
#create xy1
#copyin
#user
#uncopyin
#match 2
#log
#next
7.2b 10
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