79458382

Date: 2025-02-21 19:00:14
Score: 1
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I believe yours is very close, you just need to account for the periods in the last character set. Like so:

^app-[a-zA-Z0-9]{1,}-[a-zA-Z0-9]{1,}-[a-zA-Z0-9]{1,}-[a-zA-Z0-9.]{1,6}$
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Posted by: J-muns