Adresse h1 -> HASH(0x1a45960)
h1 : $VAR1 = {
          'a' => '1',
          'b' => '2',
          'c' => '3',
          'd' => '4'
        };
Adresse h2 -> HASH(0x1a45960)
h1 : $VAR1 = {
          'a' => '1',
          'b' => '2',
          'c' => 33,
          'd' => '4'
        };
h2 : $VAR1 = {
          'a' => '1',
          'b' => '2',
          'c' => 33,
          'd' => '4'
        };
Adresse h3 -> HASH(0x1ae0c0c)
h1 : $VAR1 = {
          'a' => '1',
          'b' => '2',
          'c' => 33,
          'd' => '4'
        };
h3 : $VAR1 = {
          'a' => '1',
          'b' => '2',
          'c' => 33,
          'd' => 44
        };