#include<bits/stdc++.h>
using namespace std;
#define int long long

signed main(){
	int A, B, a, b, ans;
	
	cin>>A>>B;
	
	a = log10(A);
	b = log10(B);
	
	if(A - (A/pow(10,a))*pow(10,a) == 0 && B - (B/pow(10,b))*pow(10,b) == 0){
		cout<<A*B/10<<endl;
	} else {
		ans = A*B;
		if(ans <= 99999999 && -99999999 <= ans) cout<<ans<<endl;
		else cout<<"E"<<endl;
	}
	
	return 0;
}