#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using namespace std;
using ll=long long;
using ld=long double;
ld pie=3.141592653589793;
ll mod=1000000007;
ll inf=1000000000000000;//10^17
ll gcd(ll a, ll b) {
	a = abs(a); b = abs(b);
	if (a < b)swap(a, b);
	while (b) {
	    ll r=a%b;
        a=b;
	    b=r;
	}
	return a;
}
int main(){
    ll a,b;
    cin >> a >> b;
    if (gcd(a,b)==1)
    {
        cout << "Odd" << endl;
    }else{
        cout << "Even" << endl;
    }
}