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From: Kamil Kuduk <kamil.kuduk@gmail.com>
Date: Wed, 22 Aug 2012 12:28:18 +0200
Subject: Re: help me debug my "word capitalizer" script
To: Santosh Kumar <sntshkmr60@gmail.com>
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Xref: csiph.com comp.lang.python:27625

> Purpose of the script:
> To capitalize the first letter of any word in a given file, leaving
> words which have 3 or less letters.

First or all? If first and this is the only purpose of the script you
can easily use sed:
less file.txt | sed -e "s/\b\([a-z]\{4,\}\)/\u\1/g"