#include "bits/stdc++.h"
using namespace std;
#define ll long long int
#define rep(i,n) for( int i = 0; i < n; i++ )
#define rrep(i,n) for( int i = n; i >= 0; i-- )
#define REP(i,s,t) for( int i = s; i <= t; i++ )
#define RREP(i,s,t) for( int i = s; i >= t; i-- )
#define dump(x)  cerr << #x << " = " << (x) << endl;
#define INF 2000000000
#define mod 1000000007
#define INF2 1000000000000000000
#define int long long

bool check(int num) {
	if (abs(num) < 100) return false;
	while (num % 10 == 0) num /= 10;
	if (abs(num) < 10) return true;
	else return false;
}

signed main(void)
{
    cin.tie(0);
    ios::sync_with_stdio(false);
	int A, B;
	cin >> A >> B;
	if (check(A) && check(B)) cout << A * B / 10 << endl;
	else if (abs(A * B) < 100000000) cout << A * B << endl;
	else cout << "E" << endl;



    return 0;
}