#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <map>
#include <cstdio>
#include <cstring>
#include <cmath>
using namespace std;
using ll = long long;

bool f(int a) {
    int b = abs(a);
    while (b != 0 && b % 10 == 0) b /= 10;
    return a % 100 == 0 && 1 <= b && b <= 9;
}

int main() {
    ll a, b;
    cin >> a >> b;

    ll c = a * b;

    if (f(a) && f(b)) {
        cout << c / 10 << endl;
    } else {
        if (abs(c) <= 99999999) {
            cout << c << endl;
        } else {
            cout << 'E' << endl;
        }
    }

    return 0;
}