#include <bits/stdc++.h>

using namespace std;

using int64 = long long;

int main() {
  int64 A, B;
  cin >> A >> B;
  int64 C = A, D = B;

  if(A == 0 || B == 0) {
    cout << 0 << endl;
    return 0;
  }

  int latte = 0, malta = 0;
  while(A % 10 == 0) {
    A /= 10;
    ++latte;
  }
  while(B % 10 == 0) {
    B /= 10;
    ++malta;
  }

  if(abs(A) <= 9 && abs(B) <= 9 && latte >= 2 && malta >= 2) {
    C *= D;
    C /= 10;
    cout << C << endl;
  } else {
    C *= D;
    if(llabs(C) <= 99999999) cout << C << endl;
    else cout << "E" << endl;
  }
}