my %temp = ( "0x55555555" => { "0x55555555" => [ ["0xAAAAAAAA", "0x9"], ],
	"0xAAAAAAAA" => [ ["0xAAAAAAAA", "0x8"], ],  },
	"0xAAAAAAAA" => { "0x55555555" => [ ["0xFFFFFFFF", "0x8"], ],
	"0xAAAAAAAA" => [ ["0x55555554", "0x3"], ],  },  );

my $var = \%temp;

##</code><code>##

{                         # ref to hash: $var
  '0xAAAAAAAA' =>         # key of hash, string: +(keys %{$var})[0]
    {                     # ref to hash: $var->{'0xAAAAAAAA'}
      '0xAAAAAAAA' =>     # key of hash, string: +(keys %{$var->{'0xAAAAAAAA'}})[0]
        [                 # ref to array: $var->{'0xAAAAAAAA'}->{'0xAAAAAAAA'}
          [               # ref to array: $var->{'0xAAAAAAAA'}->{'0xAAAAAAAA'}->[0]
            '0x55555554', # scalar: $var->{'0xAAAAAAAA'}->{'0xAAAAAAAA'}->[0]->[0]
            '0x3',        # scalar: $var->{'0xAAAAAAAA'}->{'0xAAAAAAAA'}->[0]->[1]
          ]
        ]
      '0x55555555' =>     # key of hash, string: +(keys %{$var->{'0xAAAAAAAA'}})[1]
        [                 # ref to array: $var->{'0xAAAAAAAA'}->{'0x55555555'}
          [               # ref to array: $var->{'0xAAAAAAAA'}->{'0x55555555'}->[0]
            '0xFFFFFFFF', # scalar: $var->{'0xAAAAAAAA'}->{'0x55555555'}->[0]->[0]
            '0x8',        # scalar: $var->{'0xAAAAAAAA'}->{'0x55555555'}->[0]->[1]
          ]
        ]
    }
  '0x55555555' =>         # key of hash, string: +(keys %{$var})[1]
    {                     # ref to hash: $var->{'0x55555555'}
      '0xAAAAAAAA' =>     # key of hash, string: +(keys %{$var->{'0x55555555'}})[0]
        [                 # ref to array: $var->{'0x55555555'}->{'0xAAAAAAAA'}
          [               # ref to array: $var->{'0x55555555'}->{'0xAAAAAAAA'}->[0]
            '0xAAAAAAAA', # scalar: $var->{'0x55555555'}->{'0xAAAAAAAA'}->[0]->[0]
            '0x8',        # scalar: $var->{'0x55555555'}->{'0xAAAAAAAA'}->[0]->[1]
          ]
        ]
      '0x55555555' =>     # key of hash, string: +(keys %{$var->{'0x55555555'}})[1]
        [                 # ref to array: $var->{'0x55555555'}->{'0x55555555'}
          [               # ref to array: $var->{'0x55555555'}->{'0x55555555'}->[0]
            '0xAAAAAAAA', # scalar: $var->{'0x55555555'}->{'0x55555555'}->[0]->[0]
            '0x9',        # scalar: $var->{'0x55555555'}->{'0x55555555'}->[0]->[1]
          ]
        ]
    }
}

##</code><code>##

print +(keys %{$var->{'0xAAAAAAAA'}})[1], "\n";
print $var->{'0x55555555'}->{'0xAAAAAAAA'}->[0]->[0], "\n";
print Dumper( $var->{'0x55555555'}->{'0x55555555'} );

gives you

0x55555555
0xAAAAAAAA
$VAR1 = [
          [
            '0xAAAAAAAA',
            '0x9'
          ]
        ];