#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
typedef long long ll;
typedef pair<ll,ll> P;
typedef modint1000000007 mint;
ll gcd(ll a,ll b){
    if(b%a==0) return a;
    else return gcd(b%a,a);
}
vector<ll> divisor(ll n){
    vector<ll> res;
    for(ll i=1;i*i<=n;i++){
        if(n%i==0){
            res.push_back(i);
            if(i!=n/i) res.push_back(n/i);
        }
    }
    return res;
}
int main(void){
    cin.tie(0);
    ios::sync_with_stdio(0);
    ll a,b;
    cin>>a>>b;
    ll g=gcd(a,b);
    vector<ll> v=divisor(g);
    if(v.size()%2==0){
        cout<<"Even"<<endl;
    }else{
        cout<<"Odd"<<endl;
    }
    
}