main(){
	int A,B,a,b,n,m;
	scanf("%d%d",&A,&B);
	
	a=abs(A);
	n=0;
	while(a!=0 && a%10==0){
		++n;
		a/=10;
	}
	
	b=abs(B);
	m=0;
	while(b!=0 && b%10==0){
		++m;
		b/=10;
	}
	
	if(1<=a&&a<=9 && n>=2 && 1<=b&&b<=9 && m>=2){
		printf("%lld\n",(long long)A*B/10);
	}else if(llabs((long long)A*B)<=99999999){
		printf("%d\n",A*B);
	}else{
		printf("E\n");
	}
}