//{{{
#include <bits/stdc++.h>
using namespace std;
#define repX(a,b,c,x,...) x
#define repN(a) repX a
#define rep(...) repN((__VA_ARGS__,rep3,rep2,loop))(__VA_ARGS__)
#define rrep(...) repN((__VA_ARGS__,rrep3,rrep2))(__VA_ARGS__)
#define loop(n) rep2(i_,n)
#define rep2(i,n) rep3(i,0,n)
#define rep3(i,begin,end) for(int i=(int)(begin),i##_end=(int)(end);i<i##_end;++i)
#define rrep2(i,n) rrep3(i,n,0)
#define rrep3(i,begin,end) for(int i=(int)(begin-1),i##_end=(int)(end);i>=i##_end;--i)
#define foreach(x,a) for(auto&x:a)
using ll=long long;
const ll mod=(ll)1e9+7;
//}}}

bool f(int n)
{
  n = abs(n);
  if(n < 100) return false;
  while(n > 9){
    if(n % 10){
      return false;
    }
    n /= 10;
  }
  return true;
}

int main(){
  ll a, b;
  cin >> a >> b;
  if(f(a) && f(b)){
    cout << (a * b / 10) << endl;
  }else{
    if(abs(a * b) >= 1e8){
      cout << "E" << endl;
    }else{
      cout << (a * b) << endl;
    }
  }
  return 0;
}