public function shortcodeRandom(Event $event, array $atts, $content, $tag)
    {
        if (strpos($content, ',') === false) {
            return '';
        }

        $elements = explode(',', trim($content));
        $elements = array_map('trim', $elements);
        $c = count($elements);

        if ($c == 2 && is_numeric($elements[0]) && is_numeric($elements[1])) {
            return rand($elements[0], $elements[1]);
        }

        return $elements[array_rand($elements)];
    }