#include <bits/stdc++.h>
#define syosu(x) fixed<<setprecision(x)
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> P;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<long double> vd;
typedef vector<vd> vvd;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<string> vs;
typedef vector<P> vp;
typedef vector<vp> vvp;
typedef vector<pll> vpll;
typedef pair<int,P> pip;
typedef vector<pip> vip;
const int inf=1<<30;
const ll INF=1ll<<60;
const double pi=acos(-1);
const double eps=1e-6;
const ll mod=1e9+7;
const int dx[4]={0,1,0,-1},dy[4]={1,0,-1,0};

ll A,B;

bool f(int x){
	x=abs(x);
	if(x==0||x%100!=0) return 0;
	while(x%10==0) x/=10;
	return x<10;
}

int main(){
	cin>>A>>B;
	if(f(A)&&f(B)) cout<<A*B/10<<endl;
	else{
		ll t=A*B;
		if(abs(t)<100000000) cout<<t<<endl;
		else cout<<'E'<<endl;
	}
}