This article is from the Puzzles FAQ, by Chris Cole chris@questrel.questrel.com and Matthew Daly mwdaly@pobox.com with numerous contributions by others.
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group/group.17.s
Letters that have ascenders or dots or descenders in lower case.
Letters that have ascenders or dots but not descenders in lower case.
Letters that have descenders but not ascenders or dots in lower case.
Letters that do not have ascenders or dots or descenders in lower case.
 
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