#include <bits/stdc++.h>
using namespace std;
#define int long long
int A,B;
int func() {
    int a=abs(A),b=abs(B);
    int acnt=0,bcnt=0;

    if(a==0||b==0)return 0;

    while(a%10==0){
        a/=10;
        acnt++;
    }
    while(b%10==0){
        b/=10;
        bcnt++;
    }

    if (a<10&&2<=acnt&&b<10&&2<=bcnt) {
        return 1;
    }
    return 0;
}

signed main() {
    std::cin >> A>>B;
    if(func()){
        std::cout << A*B/10 << '\n';
    }else{
        int ans = A*B;
        if (abs(ans)>99999999) {
            std::cout << "E" << '\n';
        }else{
            std::cout << ans << '\n';
        }
    }
    return 0;
}