#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define rep(i, n) for(ll i = 0, i##_len = (n); i < i##_len; i++)
#define reps(i, s, n) for(ll i = (s), i##_len = (n); i < i##_len; i++)
#define rrep(i, n) for(ll i = (n) - 1; i >= 0; i--)
#define rreps(i, e, n) for(ll i = (n) - 1; i >= (e); i--)
#define all(x) (x).begin(), (x).end()
#define sz(x) ((ll)(x).size())
#define len(x) ((ll)(x).length())

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    // ifstream in("input.txt");
    // cin.rdbuf(in.rdbuf());
    ll A, B;
    cin >> A >> B;
    string sa = to_string(A);
    string sb = to_string(B);
    bool fa = true, fb = true;
    if (len(sa) == 2) {
        fa = false;
    }
    else {
        ll idx = 1;
        if (sa[0] == '-') idx++;
        reps(i, idx, len(sa)) {
            if (sa[i] != '0') {
                fa = false;
                break;
            }
        }
    }
    if (len(sb) == 2) {
        fb = false;
    }
    else {
        ll idx = 1;
        if (sb[0] == '-') idx++;
        reps(i, idx, len(sb)) {
            if (sb[i] != '0') {
                fb = false;
                break;
            }
        }
    }
    if ((fa) && (fb)) {
        cout << (A * B / 10) << endl;
    }
    else {
        ll ans = A * B;
        if ((ans >= -99999999) && (ans <= 99999999)) {
            cout << ans << endl;
        }
        else {
            cout << "E" << endl;
        }
    }
    return 0;
}