private function exception2()
    {
        $exceptions = array(
            'inning' => 'inning',
            'outing' => 'outing',
            'canning' => 'canning',
            'herring' => 'herring',
            'earring' => 'earring',
            'proceed' => 'proceed',
            'exceed'  => 'exceed',
            'succeed' => 'succeed'
        );

        if (isset($exceptions[$this->word])) {
            return $exceptions[$this->word];
        }

        return null;
    }