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

bool isSimple(long long N){
    if (N == 0) return false;
    N = abs(N);
    if ((N % 100LL) != 0) return false;
    while ((N % 10LL) == 0){
        N /= 10LL;
    }
    return N <= 9LL;
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    long long A, B;
    cin >> A >> B;
    if (isSimple(A) and isSimple(B)){
        cout << A * B / 10LL << endl;
    }else{
        long long AB = A * B;
        if (-99999999 <= AB and AB <= 99999999){
            cout << AB;
        }else{
            cout << 'E';
        }
    }
    return 0;
}