#include <iostream>
#include <cmath>

using namespace std;

#define ll long long
const int LB = -99999999;
const int UB = 99999999;

int main()
{
  ll x, y;
  cin >> x >> y;
  if(x==0 || y==0) cout<<0<<"\n"; return 0;
  ll X=abs(x),Y=abs(y);
  bool by = (Y<10) ? false:true;
  bool bx = (X<10) ? false:true;
  if(Y>=10) by = true;
  while(X%10==0) X/10;
  while(Y%10==0) Y/10;
  ll res = x*y;
  if(bx && by && X<10 && Y<10 ) cout<<res/10<<"\n"; return 0;
  if(LB<=res && res<=UB) cout<<res<<"\n";
  else cout<<'E'<<"\n";
  return 0;
}