That's not too hard to do:
print for map{
my( $n1, $a1, $n2, $a2, $value ) = unpack 'N A4 N A4 A*', $_;
"{$n1.$a1}{$n2.$a2} => $value"
} sort map {
my $key1 = $_;
map {
pack 'N A4 N A4 A*',
split( '\.', $key1 ),
split( '\.', $_ ),
$hash{ $key1 }{ $_ }
} keys %{ $hash{ $_ } };
} keys %hash;
but it does introduce a limitation.
As coded above, the character part of the keys is limited to 4 characters each. They can be shorter but no longer. If this isn't long enough, you must adjust the formats ( 'N A4 N A4 A*' ) to say 'N A10 N A10 A*' for up to 10 chars, in both the pack and the unpack.
Examine what is said, not who speaks.
"Efficiency is intelligent laziness." -David Dunham
"Think for yourself!" - Abigail
"Memory, processor, disk in that order on the hardware side. Algorithm, algoritm, algorithm on the code side." - tachyon
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