#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);
}
int main(void){
    cin.tie(0);
    ios::sync_with_stdio(0);
    ll a,b;
    cin>>a>>b;
    ll g=gcd(a,b);
    ll l=1,r=10000000000;
    while(r-l>1){
        ll m=(l+r)/2;
        if(m*m>g){
            r=m;
        }else{
            l=m;
        }
    }
    if(l*l==g){
        cout<<"Odd"<<endl;
    }else{
        cout<<"Even"<<endl;
    }
    
}