#include <bits/stdc++.h>
  
using namespace std;
  
#define rep(i,n) REP(i,0,n)
#define REP(i,s,e) for(int i=(s); i<(int)(e); i++)
#define repr(i, n) REPR(i, n, 0)
#define REPR(i, s, e) for(int i=(int)(s-1); i>=(int)(e); i--)
#define pb push_back
#define all(r) r.begin(),r.end()
#define rall(r) r.rbegin(),r.rend()
#define fi first
#define se second
  
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
 
const int INF = 1e9;
const ll MOD = 1e9 + 7;
double EPS = 1e-8;

int main(){
    ll a, b;
    cin >> a >> b;
    auto isTen = [&](ll x) {
        while(x > 10) {
            if(x % 10 != 0) return false;
            x /= 10;
        }
        return true;
    };
    if(isTen(a) && isTen(b)) {
        cout << a * b / 10 << endl;
    }
    else {
        ll x = a * b;
        if(x < -99999999 || x > 99999999) cout << "E" << endl;
        else cout << x << endl;
    }
    return 0;
}