php-pear-Text_CAPTCHA can optionally use package "php-pear-Numbers_Words"
php-pear-Text_CAPTCHA can optionally use package "php-pear-Text_Figlet"
php-pear-Text_CAPTCHA can optionally use package "php-pear-Image_Text" (version >= 0.7.0)
php-pear-Text_CAPTCHA can optionally use PHP extension "gd"
