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

bool check(string S) {
  int zero = 0;

  for (char C : S) {
    if (C == '0')
      zero++;
  }

  return zero == (int)S.size() - 1 ? true : false;
}

void calc(int64_t A, int64_t B, bool M) {
  if (M) {
    cout << A * B / 10 << endl;
  }
  else {
    if (A * B >= -99999999 && A * B <= 99999999)
      cout << A * B << endl;
    else
      cout << 'E' << endl;
  }
}

int main() {
  int64_t A, B;
  cin >> A >> B;
  calc(A, B, check(to_string(A)) == true && check(to_string(B)) == true);
}