a-a b-b

ARRAY(0x1801180)-A B-B

A B

a => ARRAY(0x1801180)
a b => A B
b => B

$VAR1 = {
          'a' => [
                   'A',
                   'B'
                 ],
          'a b' => 'A B',
          'b' => 'B'
        };