#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(abs(a)%10==0)  a/=10;
        while(abs(b)%10==0)  b/=10;
        if(abs(a)<10&&abs(b)<10){
            cout << ans/10 << endl;
            return 0;
        }
    }
    if(ans >= -99999999 && ans <= 99999999) cout << ans << endl;
    else    cout << "E\n";
    return 0;
}