<?php
$str = trim(fgets(STDIN));
list ($a, $b) = explode(' ', $str);

if ($a % 100 == 0 && $b % 100 == 0) {
	$answer = $a * $b / 10;
} else {
	$answer = $a * $b;
	if ($answer < -99999999 || $answer > 99999999) {
		$answer = 'E';
	}
}

echo $answer . PHP_EOL;