#include<iostream>
#include<string>
#include<iomanip>
#include<cmath>
#include<vector>
#include<algorithm>
#include<utility>

using namespace std;

#define int long long
#define endl "\n"

constexpr long long INF = (long long)1e18;
constexpr long long MOD = 1'000'000'007; 

struct fast_io {
	fast_io(){
		std::cin.tie(nullptr);
		std::ios::sync_with_stdio(false);
	};
} fio;

signed main(){
	cout<<fixed<<setprecision(10);
	
	int A, B;
	int C, D;
	int ans = 0;
	
	cin>>A>>B;
	
	C = __gcd(A, B);
	
	D = sqrt((long double)C);
	
	
	for(int j = max(1ll, D - 1000); j < D + 1000; j++){
		if(j * j == C) {
			cout<<"Odd"<<endl;
			return 0;
		}
	}
	
	cout<<"Even"<<endl;
	
	return 0;
}