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

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define REP(i, k, n) for (int i = (int)(k); i < (int)(n); i++)
#define rrep(i, n) for (int i = (int)(n)-1; i >= 0; i--)
#define rREP(i, k, n) for (int i = (int)(n)-1; i >= k; i--)

#define fi first
#define se second

#define vi vector<int>
#define pb push_back
#define mp make_pair

#define pcnt __builtin_popcount

typedef long long ll;

const int inf = 100100100;
const int MOD = (int)1e9 + 7;
const double EPS = 1e-9;

template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }

int main(){
    ll A,B;
    cin >> A >> B;
    //ユキさんが暗算するパターン
    bool yuki = false;
    ll t = A;
    while(t!=0 && t%10==0) t/=10;
    if(abs(t)>=10 || abs(A)<100 ) yuki =true;
    t = B;
    while(t!=0 && t%10==0) t/=10;
    if(abs(t)>=10 || abs(B)<100 ) yuki =true;
    if(yuki==false){
        cout << A*B/10 << endl;
        return 0;
    }
    //電卓を使う
    if(abs(A*B)>99999999) cout << "E" << endl;
    else cout << A*B << endl;
    return 0;
}