Two comments to this, though.

The {1} quantifier in my $KEY = qr/>([A-Z]{1})/; doesn't serve any purpose.

But more importantly, your solution doesn't offer the dashes for those cases where no records were found for a given letter - something which is part of the original specification.

In reply to Re^2: hash of hashes? by muba
in thread hash of hashes? by sanahmed

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