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

int main() {
	long long A, B;
	cin >> A >> B;
	int oa, ob;
	if (A == 0 || B == 0) goto REG;

	oa = log10(abs(A));
	ob = log10(abs(B));
	if (oa < 2 || ob < 2) goto REG;
	if (A%(int)pow(10,oa) == 0 && B%(int)pow(10,ob) == 0) {
		cout << A*B/10 << endl;
		return 0;
	}
REG:
	if (abs(A*B) >= 1e8) { 
		cout << "E" << endl;
	}
	else {
		cout << A*B << endl;
	}
	
	return 0;
}