#include <iostream>
using namespace std;

int main(){
	int a,b,c;
	cin>>a>>b;
	c=a*b;
	if(a%100==0&&b%100==0){
		c=c/10;
		cout<<c<<endl;
		} else if(c>99999999||c<-99999999){
			cout<<"E"<<endl;
			}else{
				cout<<c<<endl;
			}
			}