Vowel harmony

Notice: Undefined variable: ad_vert in /home/majstro/majstro.com/Web/Majstro/right_ad.php on line 25 Warning: array_rand() expects parameter 1 to be array, null given in /home/majstro/majstro.com/Web/Majstro/right_ad.php on line 25 Notice: Undefined variable: ad_vert in /home/majstro/majstro.com/Web/Majstro/right_ad.php on line 25 Warning: readfile(Ads/.txt): failed to open stream: No such file or directory in /home/majstro/majstro.com/Web/Majstro/right_ad.php on line 27