#include <bits/stdc++.h>

using namespace std;
typedef long long ll;
#define REP(i,n) for(int i=0; i<int(n); i++)
#define FOR(i,m,n) for(int i=int(m); i<int(n); i++)
#define ALL(obj) (obj).begin(),(obj).end()
#define VI vector<int>
#define VLL vector<long long>
#define VVI vector<vector<int>>
#define VVLL vector<vector<long long>>
#define VC vector<char>
#define VS vector<string>
#define VVC vector<vector<char>>
#define fore(i,a) for(auto &i:a)

typedef pair <int, int> P;
template<class T> bool chmax(T &a, T b) { if (a < b) { a = b; return true; } return false; }
template<class T> bool chmin(T &a, T b) { if (a > b) { a = b; return true; } return false; }
const int  INF = 2147483647;
const ll INFL = 9223372036854775807;
const ll mod = 1000000007;





int main() {
	
	ll a, b;
	cin >> a >> b;
	ll n = abs(a);
	ll m = abs(b);
	bool c = true;
	if (n < 100 || m < 100)c = false;
	while (n) {
		if (n % 10) {
			if (n / 10) {
				c = false;
			}
			break;
		}
		n /= 10;
	}
	while (m) {
		if (m % 10) {
			if (m / 10) {
				c = false;
			}
			break;
		}
		m /= 10;
	}
	if (c) {
		cout << a * b / 10 << endl;
		return 0;
	}
	if (-99999999 <= a * b&&a*b <= 99999999) {
		cout << a * b << endl;
	}
	else cout << 'E' << endl;


	return 0;
}