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[0]>0 && (num[1] % 100) == 0 && num[1]>0 ;
        var a = num[0] * num[1];
        Console.WriteLine(isAnzan ? (a / 10).ToString() : -99999998 < a && a < 10000000 ? a.ToString() : "E");
    }
}