#include<bits/stdc++.h>

using namespace std;
using ll=long long;
#define rep2(i, a, n) for(int i = (a); i < (n); i++)
#define rep(i, n) rep2(i,0,n)

int main(){
  cin.tie(nullptr);ios_base::sync_with_stdio(false);
  ll a,b;cin>>a>>b;
  if((a<=-100||a>=100)&&(b<=-100||b>=100)){
    int cnt=0;
    if(a<0){
      a*=-1;
      cnt++;
    }
    if(b<0){
      b*=-1;
      cnt++;
    }
    if((a%(to_string(a).size()*10)==0)&&((b%((to_string(b).size())*10)==0))){
    cout<<(cnt==1?-a*b/10:a*b/10)<<endl;
    }else if(a*b>99999999){
      cout<<"E"<<endl;
    }else{
      cout<<a*b<<endl;
    }
  }else{
    cout<<a*b<<endl;
  }
}