#include<iostream>
#include<cmath>
using ll = long long;
using namespace std;
int main(){
    ll a,b;
    ll ans;
    cin >> a >> b;
    ans = a*b;
    if(abs(a)>=100&&abs(b)>=100){
    while(a%10==0)  a/=10;
    while(b%10==0)  b/=10;
    if(a<10&&b<10){
          cout << ans/10 << endl;
          return 0;
         }
    }
    if(ans >= -99999999 && ans <= 99999999) cout << ans << endl;
    else    cout << "E\n";
    return 0;
}