//g++ -std=c++11 -Wall -O2 -o main.exe main.cpp

#include <cstdio>
#include <iostream>
#include <string>
#include <vector>
#include <functional>
#include <algorithm>
#include <complex>
#include <numeric>
//最大公約数: gcd()
//最小公倍数: lcm()

#define ll long long int

using namespace std;

template <typename T>
void in(T &t){ //標準入力
    cin >> t;
    return;
}

template <typename T>
void sortasc(vector<T> &v){ //vectorを昇順にソート
    sort(v.begin(), v.end(), std::greater<int>());
    return;
}

template <typename T>
void sortdesc(vector<T> &v){ //vectorを降順にソート
    sort(v.begin(), v.end(), std::less<int>());
    return;
}

int main(){
    int i, j;
    ll a, b;
    bool flag = true;

    cin >> a >> b;

    for(i = 1; i < abs(a / 10); i *= 10){
        if(a % i != 0){
            flag = false;
            break;
        }
    }

    for(j = 1; j < abs(b / 10); j *= 10){
        if(b % j != 0){
            flag = false;
            break;
        }
    }

    if(abs(a) < 100 || abs(b) < 100) flag = false;

    if(flag) cout << (a * b / 10) << endl;
    else{
        if(a * b > (ll)99999999 || a * b < (ll)-99999999) printf("%s\n", "E");
        else cout << (a * b) << endl;
    }

    return 0;
}