#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (n); i++)
using namespace std;
typedef long long ll;

int main(){
    cin.tie(0);
    ios::sync_with_stdio(0);
    
    ll A,B; cin >> A >> B;
    auto f = [&](ll X) {
        string s = to_string(abs(X));
        if(s.size() <= 2u) return false;
        for(int i = 1; i < int(s.size()); i++) if(s[i] != '0') return false;
        return true;
    };

    ll C = A * B;
    if(f(A) && f(B)) {
        if(C % 10 == 0) {
            cout << C / 10 << endl;
        } else {
            cout << C << endl;
        }
    } else {
        if(-99999999 <= C && C <= +99999999) {
            cout << C << endl;
        } else {
            cout << "E" << endl;
        }
    }
}