#define _USE_MATH_DEFINES
#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define MT make_tuple
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
#define RT return
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;
using vll = vector<ll>;

bool f(ll x) {
    if (x < 0)x *= -1;
    int p = 0, q = 0;
    while (x) {
        if (x % 10 != 0)p++;
        else q++;
        x /= 10;
    }
    RT p == 1 && q >= 2;
}

void solve() {
    ll A, B;
    cin >> A >> B;
    ll ans = A * B;
    if (f(A) && f(B)) {
        cout << ans / 10 << endl;
    } else {
        if (abs(ans) <= 99999999)cout << ans << endl;
        else cout << "E" << endl;
    }
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout << fixed << setprecision(15);
	solve();
	return 0;
}