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my $HoA = {
            flintstones        => [ "fred", "barney" ],
            jetsons            => [ "george", "jane"],
      };

# Desired result:
my $AoH = [
...

];

my $HoA = {
            '1,2,flintstones' => [ "fred-1 foo-2", "barney-1 bar-2" ],
            '2,3,jetsons'   => [ "george-1 foo-2", "jane-1 bar-2"],
      };

my $HoA3 = {
            'flintstones'    => [ "fred" ],
...
            'jetsons' => 'george'
          }
        ];

my $HoA4 = {
            'flintstones'    => [ "fred" ],
...
          }
        ];