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

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, A % 100 == 0 && B % 100 == 0);
}