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]);
        
        if(Abs(a)>=100 && Abs(b)>=100){
            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);
                }
            }
        }else{
            if(Abs(a*b)>99999999){
                WriteLine("E");
            }else{
                WriteLine(a*b);
            }
        }
    }
}