#include<iostream>
#include<cmath>
using namespace std;
long gcd(long a,long b){return b?gcd(b,a%b):a;}
main()
{
	long A,B;cin>>A>>B;
	long G=gcd(A,B);
	long T=sqrt((double)G);
	while((T+1)*(T+1)<=G)T++;
	while((T-1)*(T-1)>=G)T--;
	cout<<(T*T==G?"Odd":"Even")<<endl;
}