$input = trim(fgets(STDIN));
$str = explode(" ", $input);
$from = (int) $str[0];
$to = (int) $str[1];
for ($i = $from; $i <= $to; $i++) {
if (($i % 3 === 0) || (preg_match('/^[0-9]*3[0-9]*$/', $i))) { 
    echo $i;
    echo "\n";
    }
}