public function replaceText(string $str) : string
    {
    	foreach (Unicode::$char as $key => $value) {
    		if ($key === $str) {
    			$result = ((count($value) > 1) ? Unicode::$char[$key][random_int(0, count($value)-1)] : Unicode::$char[$key][0]);
    		}
    	}
    	
    	return $result ?? $str;
    }