Have you tried captures and backreferences? 

#   A    B     C     D    E   C  F    G
m/[a-z][a-z]([a-z])[a-z][a-z]\1[a-z][a-z]/

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-ArchFool

In reply to Re: Regex help by archfool
in thread Regex help by Anonymous Monk

Title:
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