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need help to understand a regex

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From:
Jerry Preston
Date:
January 15, 2002 04:13
Subject:
need help to understand a regex
Message ID:
3C441D1D.2A1CAA24@ti.com
All,

I need to understand this regex in detail:

$key=~/^r(\d+)c(\d+)$/

Thanks for your help and time,

Jerry
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