#include <iostream>
#include <cmath>

using namespace std;

int main(){
	long in[2],in_p[2],ans;
	int abso[2]={10,10};  //絶対値
	int count[2]={};
	int i,n;

	cin>>in[0]>>in[1];

	for(i=0;i<2;i++){
		in_p[i]=in[i];
		while(in_p[i]%10==0 && (in_p[i]>0 || in_p[i]<0)){
			in_p[i]/=10;
			count[i]++;
		}
	}

	for(i=0;i<2;i++){
		abso[i]=in[i]/(pow(10,count[i]));
	}


	if((-9<=abso[0] && abso[0]<=9) && (-9<=abso[1] && abso[1]<=9) && (count[0]>=2 && count[1]>= 2) && (in[0]%10==0 && in[1]%10==0)){
		ans=(in[0]*in[1])/10;
		cout<<ans<<"\n";
		exit(0);
	}

	ans=in[0]*in[1];

	if(-99999999<=ans && ans<=99999999){
		cout<<ans<<"\n";
		exit(0);
	}

	cout<<"E"<<"\n";

	return 0;
}