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

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0); 	
	
	long long a, b;
	cin >> a >> b;
	long long x = abs(a), y = abs(b);
	while(x % 10 == 0) {
		x /= 10;
	} 
	while(y % 10 == 0) {
		y /= 10;
	}
	if(a % 100 == 0 && b % 100 == 0 && x < 10 && y < 10) {
		cout << a * b / 10 << endl;
	} else {
		if(abs(a * b) > 99999999) {
			cout << "E" << endl;
		} else {
			cout << a * b << endl;
		}
	}

	return 0;
}