use std::io::{Read, stdin};

fn main() {
    let mut buf = String::new();
    stdin().read_to_string(&mut buf).unwrap();
    let mut tok = buf.split_whitespace();
    let mut get = || tok.next().unwrap();
    macro_rules! get {
        ($t:ty) => (get().parse::<$t>().unwrap());
        () => (get!(i64));
    }
    
    let a = get!();
    let b = get!();
    
    if is_yuki(a) && is_yuki(b) {
        println!("{}", a * (b / 10));
        return;
    }
    
    let ans = a * b;
    if ans.abs() < 1_0000_0000 {
        println!("{}", ans);
    } else {
        println!("E");
    }
    
}

fn is_yuki(v: i64) -> bool {
    let mut d = 0;
    let mut v = v.abs();
    while v > 9 {
        if v % 10 != 0 {
            return false;
        }
        v /= 10;
        d += 1;
    }
    d >= 2 && v > 0
}