Your script reminds me of a Jackson's song. "Simple as 1-2-3, A-B-C!". It's a pneumonic that I've used to help me remember hash slices, which is what I believe that you're looking for.

#!/usr/bin/perl 

use strict;
use warnings;
use Data::Dumper::Concise;

my %hash = (1 => 'A', 2 => 'B', 3 => 'C');
print "The first and second keys: hash slice ==> \n", 
Dumper( @hash{qw(1 2)} );
print "Just the third key: \n", Dumper( $hash{3} );
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Note that I used @hash{qw(1 2)} to get at multiple keys; also, the keys must be quoted in slices.