<?php
$_fp = fopen("php://stdin", "r");
/* Enter your code here. Read input from STDIN. Print output to STDOUT */
if ($_fp) {
    $nums = Array(); $goods = Array();
    while (($line = fgets($_fp)) !== false) {
        $line = trim($line);
        $nums[] = $line;
    }

    if (is_numeric($nums[0]) && is_numeric($nums[1]) || $nums[0]<=$nums[1]) {
        for ($i = $nums[0]; $i<$nums[1]; $i++) {
            $test = $i*$i;
            $k = strlen($test);
            for ($j=0; $j<$k; $j++) {
                $first = substr($test,0,$j);
                $second = str_replace($first, "", $test);
                if (strlen($second)>0 && $second>0 && ($first+$second)==$i) $goods[] = $i;
            }

        }
    }
    $goods = array_unique($goods);
    if (count($goods)>0) {
        echo implode(" ", $goods);
    } else {
        echo "INVALID RANGE";
    }

    fclose($_fp);
} else {
    echo "INVALID RANGE";
}
?>