Due to their inner workings, hashes don't return the entries in the order you entered them (or only by accident).  If the ordering matters, you can use the Tie::IxHash module.

#!/usr/bin/perl
use strict;
use warnings;
use Tie::IxHash;

tie my %hash2, "Tie::IxHash";

%hash2=(
    a => "apple",
        b => "boy",
        c => "cat"
          );

my @keys=keys %hash2;
foreach my $s (@keys)
{
    print "$hash2{$s} ";
}


__END__
$ ./838968.pl
apple boy cat
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