#include <iostream>
#include <set>
using namespace std;
int main(){
	int A, B;
	cin >> A >> B;
	set<int> st;
	for (int i = 1; i <= 9; i++){
		int tmp = i * 10;
		for (int j = 0; j < 6; j++){
			tmp *= 10;
			st.insert(tmp);
			st.insert(- tmp);
		}
	}
	if (st.count(A) && st.count(B)){
		cout << (long long) A * B / 10 << endl;
	} else if (abs((long long) A * B) < 100000000){
		cout << A * B << endl;
	} else {
		cout << 'E' << endl;
	}
}