public static function singlelise($string)
    {
        $rules = [
            'ies' => 'y',
            'ves' => 'f',
            's'   => '',
        ];

        foreach ($rules as $ending => $replacement) {
            if ($ending === substr($string, -strlen($ending))) {
                return substr($string, 0, -strlen($ending)) . $replacement;
            }
        }

        return $string . 'Single';
    }