#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=int(a);i<int(b);++i)
using namespace std;
typedef long long ll;
int INF = (1LL << 30) - 1;
int MOD = 1e9+7;
string to_str(ll A){
    stringstream ss;
    ss << A;
    return ss.str();
}
main(){
    ll A,B;
    cin >> A >> B;
    string S = to_str(abs(A)), T = to_str(abs(B));
    if(S.size() >= 3 && S[1] == '0' && T.size() >= 3 && T[1] == '0'){
        cout << A * B / 10 << endl;
    }else{
        if(abs(A * B) < 100000000LL){
            cout << A * B << endl;
        }else{
            cout << "E" << endl;
        }
    }
}