sed question

From: John Dunn (john.dunn@SEFAS.CO.UK)
Date: Wed Jul 09 2003 - 04:02:18 EDT

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I need a shell script that will change characters 945-950 in the first line
only of a file to a specified string, i.e "GORDON". I will not know what
the original value is. Can I do this with sed, if so, how, or do I need to
use awk?
J

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