#include <algorithm>
#include <array>
#include <cmath>
#include <cstdio>
#include <deque>
#include <iomanip>
#include <iostream>
#include <numeric>
#include <optional>
#include <queue>
#include <set>
#include <sstream>
#include <unordered_map>
#include <unordered_set>
#include <vector>

using namespace std;

int main() {
    int64_t a, b;
    cin >> a >> b;
    auto f = [](int64_t x) {
        x = abs(x);
        if (x < 100)
            return false;
        while (x % 10 == 0) {
            x /= 10;
        }
        return x < 10;
    };
    if (f(a) && f(b)) {
        cout << a * b / 10 << endl;
    } else {
        if (-99999999 <= a * b && a * b <= 99999999) {
            cout << a * b << endl;
        } else {
            cout << "E" << endl;
        }
    }
    return 0;
}