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

int main(){
  long long a, b; cin >> a >> b;
  if (a % 100 == 0 && b % 100 == 0) {
    cout << a * b / 10 << endl;
  } else {
    if (abs(a * b) > 99999999) cout << "E" << endl;
    else cout << a * b << endl;
  }
  return 0;
}