using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;
using System.Diagnostics;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    static int[][] NArr(long n) => Enumerable.Repeat(0, (int)n).Select(_ => NList).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var s = ReadLine().Split();
        var a = long.Parse(s[0]);
        var b = long.Parse(s[1]);
        if (IsBlind(s[0]) && IsBlind(s[1]))
        {
            WriteLine(a * b / 10);
        }
        else
        {
            var ans = a * b;
            WriteLine(-99999999 <= ans && ans <= 99999999 ? ans.ToString() : "E");
        }
    }
    static bool IsBlind(string s)
    {
        var e = new System.Text.RegularExpressions.Regex("-?[1-9]00+");
        return e.Match(s).Success;
    }
}