#include <cstdio>
#include <cstring>
#include <iostream>
#include <string>
#include <cmath>
#include <bitset>
#include <vector>
#include <map>
#include <set>
#include <queue>
#include <deque>
#include <algorithm>

using namespace std;
typedef long long int ll;
typedef pair<int, int> P;

int main()
{
	ll a, b;
	cin>>a>>b;
	ll a1=abs(a), b1=abs(b);
	int n=0, m=0;
  if(a==0 || b==0){
    cout<<0<<endl;
    return 0;
  }
	while(a1%10==0){
		a1/=10;
		n++;
	}
	while(b1%10==0){
		b1/=10;
		m++;
	}
	if(n>=2 && m>=2 && 1<=a1 && a1<=9 && 1<=b1 && b1<=9){
		cout<<a*b/10<<endl;
		return 0;
	}
	if(-99999999<=a*b && a*b<=99999999){
		cout<<a*b<<endl;
	}else{
		cout<<"E"<<endl;
	}
	return 0;
}