#include<stdio.h>
int main()
{
	long long int a, b;
	scanf("%lld %lld", &a, &b);
	long long int s = a * b;
	if (a < 0)
		a *= -1;
	int k = 0;
	if (a >= 100)
	{
		while (a > 0)
		{
			if (a % 10 > 0)
				k++;
			a /= 10;
		}
	}
	if (k == 1)
	{
		k = 0;
		if (b < 0)
			b *= -1;
		if (b >= 100)
		{
			while (b > 0)
			{
				if (b % 10 > 0)
					k++;
				b /= 10;
			}
		}
		if (k == 1)
		{
			printf("%lld\n", s / 10);
			return 0;
		}
	}
	if (s < -99999999 || 99999999 < s)
		printf("E\n");
	else
		printf("%lld\n", s);
	return 0;
}