#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

bool f(ll x) {
  while (x != 0) {
    if (x % 10 != 0) break;
    x /= 10;
  }
  return abs(x) < 10;
}


int main() {
  ll a, b;
  cin >> a >> b;
  if (f(a) && f(b)) {
    cout << (a * b / 10) << '\n';
  } else {
    ll ans = a * b;
    if (abs(ans) > 99999999) puts("E");
    else cout << ans << '\n';
  }
  return 0;
}