using System;
using System.Linq;

class No722
{
    static void Main()
    {
        var num = Console.ReadLine().Split(' ').Select(x => Int64.Parse(x)).ToArray();
        var isAnzan = (num[0] % 100) == 0 && (num[1] % 100) == 0 && Math.Abs(num[0]).ToString().Where(x => x != 0).Count()<2&& Math.Abs(num[1]).ToString().Where(x => x != 0).Count() < 2;
        var a = num[0] * num[1];
        Console.WriteLine(isAnzan ? (a / 10).ToString() : -100000000 < a && a < 100000000 ? a.ToString() : "E");
    }
}