Perhaps this example will help 
foreach $key (sort keys %tophash) {
  foreach $subkey (sort keys %{$tophash{$key}}) {
     print "$key/$subkey = $tophash{$key}{$subkey}\n";
  }
}

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In reply to Re: Getting keys of a hash element by mr.nick
in thread Getting keys of a hash element by Mandor

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