#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 mx=gcd(a,b);	
	ll n=mx;
	vector<ll> v;
	int i=2;
	while(1){
		if(mx%i==0){v.push_back(i); mx/=i;}
		else{i++;}
		if(mx==1) break;
	}
	if(n==1) cout<<"Odd"<<endl;
	else if(n>1&&v.size()==1) cout<<"Odd"<<endl;
	else if(v.size()%2==0) cout<<"Even"<<endl;
	else cout<<"Odd"<<endl;
}