{
  feet   => ["left", "right"],
  shoes  => ["loader", "sneaker", "boot"],
  things => [],
}





{
  feet   => ["left", "right"],
  shoes  => ["loader", "sneaker", "boot", "slippers"],
  things => [],
}




do {
  my $a = {
    feet   => ["left", "right"],
    shoes  => ["loader", "sneaker", "boot", "slippers"],
    things => ['fix', 'fix'],
  };
  $a->{things}[0] = $a->{feet};
  $a->{things}[1] = $a->{shoes};
  $a;
}