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From: gautier_niouzes@hotmail.com
Newsgroups: comp.lang.ada
Subject: Re: Checking to see if a string is a letter
Date: Tue, 3 Apr 2012 07:19:26 -0700 (PDT)
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Date: 2012-04-03T07:19:26-07:00
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> There are boolean operators which are also of length one.

So you check first the length, and then whether the first character is a letter.
(I almost wrote the Ada code :-) there!)
G.