fn main() {
	let mut s = String::new();
	std::io::stdin().read_line(&mut s).ok();
	let n: Vec<i64> = s.split_whitespace().flat_map(str::parse).collect();
	if n.iter().all(|n| {
		let mut x = n.abs();
		while x != 0 && x % 10 == 0 {
			x /= 10;
		}
		n.abs() > 99 && x > 0 && x < 10
	}) {
		println!("{}", n[0] * n[1] / 10);
		return;
	}
	let a = n[0] * n[1];
	if a.abs() < 100000000 {
		println!("{}", a)
	} else {
		println!("E")
	}
}