using System;
using static System.Console;
using static System.Math;

public class Hello{
    public static void Main(){
        string[] input = ReadLine().Split(' ');
        long a = long.Parse(input[0]);
        long b = long.Parse(input[1]);
        
        long c = a;
        long d = b;
        while(c%10==0){
            c/=10;
        }
        while(d%10==0){
            d/=10;
        }
        c = Abs(c);
        d = Abs(d);
        if(0<c&&c<10 && 0<d&&d<10){
            WriteLine(a*b/10);
        }else{
            if(Abs(a*b)>99999999){
                WriteLine("E");
            }else{
                WriteLine(a*b);
            }
        }
    }
}