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1.1 root 1: #print
2: Sometimes ? is too flexible, and you
3: only want to allow a few characters. For example,
4: you might want to abbreviate
5: ls memo.ab memo.ac
6: without picking up "memo.ad", "memo.ae", and so forth.
7: You can match one of a set of particular characters by
8: putting them in brackets "[]" in the list you use with "ls".
9: For example,
10: [bc]
11: matches either b or c but no other letters. Thus
12: ls memo.a[bc]
13: will list exactly "memo.ab" and "memo.ac" if present.
14:
15: How many of the files
16: xya, xyb, xyc, xyd
17: exist in this directory?
18: Type "answer N" where N is the number.
19: #create xyb
20: #create xyc
21: #create xye
22: #create xyf
23: #create xy1
24: #copyin
25: #user
26: #uncopyin
27: #match 2
28: #log
29: #next
30: 7.2b 10
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