#include <bits/stdc++.h>
using namespace std;

int main() {
   long long a,b,r;
   r=1;
   cin>>a>>b;
   if(a<b){
       swap(a,b);
   }
   while(r!=0){
       r=a%b;
       a=b;
       b=r;
   }
   long long s=sqrt(a);
   if(a==s*s){
       cout<<"Odd"<<endl;
   }
   else{
       cout<<"Even"<<endl;
   }
}