#include<bits/stdc++.h>
using namespace std;
using Int = long long;
//INSERT ABOVE HERE
signed main(){
  Int a,b;
  cin>>a>>b;
  if(a==0||b==0) return cout<<0<<endl,0;
  Int c=abs(a),d=abs(b);
  while(c%10==0) c/=10;
  while(d%10==0) d/=10;
  if(abs(a)>=100&&abs(b)>=100&&c<10&&d<10) return cout<<a*b/10<<endl,0;
  Int L=-99999999,R=99999999;
  Int x=a*b;
  if(L<=x&&x<=R) cout<<x<<endl;
  else cout<<"E"<<endl;
  
  return 0;
}