#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include <map>
#include <utility>
#include <set>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <sstream>
#include <complex>
#include <stack>
#include <queue>
#include <iomanip>
#include <array>
#include <numeric>
#include <regex>
#include <bitset>
#include <deque>

using namespace std;
typedef long long ll;
typedef pair<int, int> p_ii;

const int INF = 1e9;
const double PI = acos(-1.0);
const ll MOD = 1e9 + 7;

ll dig(ll x){
    x=abs(x);
    int d = 0;
    while(x!=0){
        d++;
        x/=10;
    }
    
    ll ret = 1;
    for (int i = 0; i < d-1; i++) {
        ret*=10;
    }
    return ret;
}

int main() {
    ll A, B;
    cin>>A>>B;
    ll diA= dig(A), diB= dig(B);

    if(A!=0 && B!=0 && abs(A)%diA==0 && abs(B)%diB==0){
        cout<<A*B/10<<endl;
    }
    else{
        ll res=A*B;
        if(res<-99999999 || res>99999999){
            cout<<'E'<<endl;
        }else{
            cout<<A*B<<endl;
        }
    }

    return 0;
}