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

int main()
{
	long long A, B;
	cin >> A >> B;

	int flag = 0;
	long long n = 10;
	while( A % n == 0 ) n *= 10;
	n /= 10;
	int a = abs( A ) / n;
	if( n >= 100 && 1 <= a && a <= 9 ) flag++;
	long long m = 10;
	while( B % m == 0 ) m *= 10;
	m /= 10;
	int b = abs( B ) / m;
	if( m >= 100 && 1 <= b && b <= 9 ) flag++;
	long long ans = A * B / 10;
	if( flag < 2 ) {
		ans = A * B;
		if( abs( ans ) > 99999999 ) {
			cout << "E" << endl;
			return 0;
		}
	}

	cout << ans << endl;
}