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

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; }

#define FOR(i,a,b) for(ll i=(a);i<(b);++i)
#define ALL(v) (v).begin(), (v).end()
#define p(s) cout<<(s)<<endl
#define p2(s, t) cout << (s) << " " << (t) << endl
#define br() p("")
#define pn(s) cout << (#s) << " " << (s) << endl
#define p_yes() p("Yes")
#define p_no() p("No")

bool has_00(ll v){
    string s = to_string(v);
    ll L = s.size();
    if(L<3){
        return false;
    }else{
        if(s[L-1]=='0' && s[L-2]=='0'){
            return true;
        }else{
            return false;
        }
    }
}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);

    // input
    ll A, B; cin >> A >> B;

    if(has_00(A) && has_00(B)){
        // anzan
        ll ans = A*B/10;
        p(ans);
        return 0;
    }
    else{
        // dentaku
        ll ans = A*B;
        if(-99999999<=ans && ans<=99999999){
            p(ans);
        }else{
            p('E');
        }
        return 0;
    }
    
    return 0;
}