#define _USE_MATH_DEFINES
#include<iostream>
#include<vector>
#include<algorithm>
#include<cmath>
#include<string>
#include<iomanip>
#include<numeric>
#include<queue>
#include<deque>
#include<stack>
#include<set>
#include<map>
#include<random>
using namespace std;
typedef long long ll;
const int mod=1e9+7;
int main(){
	ll a,b;
	cin>>a>>b;
	int aa=a,bb=b;
	while(aa%10==0)
		aa/=10;
	while(bb%10==0)
		bb/=10;
	if(abs(aa)<10&&abs(bb)<10)
		cout<<(a*b%10==0?a*b/10:a*b)<<endl;
	else if(abs(a*b)<1e8)
		cout<<a*b<<endl;
	else
		cout<<'E'<<endl;
}