#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
using ll =  long long ;
using P = pair<int,int> ;
const int INF = 1e9;
const int MOD = 1000000007;

bool check(ll x){
    int cnt = 0;
    while(x > 0){
        int k = x%10;
        x /= 10;
        cnt ++;
        if(k > 0 && x != 0) return false;
    }
    return cnt >=3 ;
}

int main(){
    ll A,B;
    cin >> A >> B;
    bool rev_a = false,rev_b = false;
    if(A < 0) A = -A,rev_a = true;
    if(B < 0) B = -B,rev_b = true;
    int k = ((rev_a ^ rev_b) ? -1 : 1);
    if(check(A) && check(B)){   
        cout << k * A * B / 10 << endl;
        return 0;
    }
    ll C = k * A * B;
    if(-99999999 <= C && C <= 99999999) cout << C << endl;
    else cout << 'E' << endl;
    return 0;
}