#include <bits/stdc++.h>
using namespace std;
 
int main() {
  long long A,B;
  long long H=0;
  cin>>A>>B;
  long long Y=sqrt(__gcd(A,B));
  if(Y*Y!=__gcd(A,B)){
    cout<<"Even"<<endl;
  }
  else{
    cout<<"Odd"<<endl;
  }
}