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Top Forums UNIX for Dummies Questions & Answers Extracting Multiple String in a File Post 302951586 by Don Cragun on Friday 7th of August 2015 01:24:59 PM
Old 08-07-2015
Could you please state, in English, the logic determining which words are to be discarded and which words are to be printed?

It isn't at all clear to me why your desired output excludes "world", "Default", "select", "from", and "dual" nor why "UNIXid" is included.
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british-english(5)						   Users' Manual						british-english(5)

NAME
british-english - a list of English words DESCRIPTION
/usr/share/dict/british-english is an ASCII file which contains an alphabetic list of words, one per line. FILES
There may be any number of word lists in /usr/share/dict/. /etc/dictionaries-common/words is a symbolic link to the currently-chosen /usr/share/dict/<language> file. /usr/share/dict/words is a symbolic link to /etc/dictionaries-common/words, and is the name by which other software should refer to the system word list. See select-default-wordlist(8) for more information, and/or to change the currently- chosen word list. The directory /usr/share/dict can contain word lists for many languages, with name of the language in English, e.g., /usr/share/dict/french and /usr/share/dict/danish contain respectively lists of French and Danish words if they exist. Such lists should be coded using the ISO 8859-1 character set encoding. SEE ALSO
ispell(1), select-default-wordlist(8), and the Filesystem Hierarchy Standard. HISTORY
The words lists are not specific, and may be generated from any number of sources. The system word list used to be /usr/dict/words. For compatibility, software should check that location if /usr/share/dict/words does not exist. AUTHOR
Word lists are collected and maintained by various authors. The Debian English word lists are built from the SCOWL (Spell- Checker Ori- ented Word Lists) package, whose upstream editor is Kevin Atkinson <kevina@users.sourceforge.net>. Debian 16 June 2003 british-english(5)
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