#include <bits/stdc++.h>
typedef long long ll;
const int INF = 1e9,MOD = 1e9+7,ohara = 1e6;
const ll LINF = 1e18;
using namespace std;

#define rep(i,n) for(ll (i)=0;(i)<(int)(n);(i)++)
#define rrep(i,a,b) for(ll i=(a);i<(b);i++)
#define rrrep(i,a,b) for(ll i=(a);i>=(b);i--)
#define all(v) (v).begin(), (v).end()
#define pb(q) push_back(q)
#define Size(n) (n).size()
#define Cout(x) cout<<(x)<<endl

ll n,cnt=0,ans=0,a,b,c,d,cmp,cmpp,m,h,w,x,y,sum=0,pos;
int dy[]={1,0,-1,0};
int dx[]={0,1,0,-1};
//int dy[]={-1,0,1,-1,1,-1,0,1};
//int dx[]={-1,-1,-1,0,0,1,1,1};
string alph("abcdefghijklmnopqrstuvwxyz"),s,t;
bool fl;
struct edge{int to,cost;};

//-------------------------↓↓↓↓↓↓------------------------

int main(void){
       cin.tie(0);
    ios::sync_with_stdio(false);
      
    cin>>a>>b;
    s=to_string(a);t=to_string(b);
    rrep(i,1,Size(s)){
        if(s[0]=='-'&&i==1)continue;
        if(s[i]!='0')fl=true;
    }
    rrep(i,1,Size(t)){
        if(t[0]=='-'&&i==1)continue;
        if(t[i]!='0')fl=true;
    }
    c=0;
    rep(i,Size(s)){
        if(s[i]=='0')c=1;
    }
    if(c==0)fl=true;
    rep(i,Size(t)){
        if(t[i]=='0')c=1;
    }
    if(c==0)fl=true;
    if(fl||a==10||b==10){
        ans=a*b;
        if(-99999999<=ans&&ans<=99999999)Cout(ans);
        else Cout("E\n");
    }
    else{
        Cout(a*b/10);
    }
    return 0;
}