#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0; i<(n); i++)
typedef long long ll;

int main(){
	ll a,b; cin>>a>>b;
	ll n=gcd(a,b);
	double g=sqrt(n);
	if(n==1||(ll)g==g) cout<<"Odd"<<endl;
	else cout<<"Even"<<endl;
}