#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#define ll long long
#define rep(i,n) for(ll i=0;i<(n);i++)
#define pll pair<ll,ll>
#define pq priority_queue
#define pb push_back
#define eb emplace_back
#define fi first
#define se second
#define ios ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define lb(c,x) distance(c.begin(),lower_bound(all(c),x))
#define ub(c,x) distance(c.begin(),upper_bound(all(c),x))

using namespace std;

template<class T> inline bool chmax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
template<class T> inline bool chmin(T& a,T b){if(a>b){a=b;return 1;}return 0;}

const ll INF=1e9+1;

ll gcd(ll a, ll b) { return b?gcd(b,a%b):a;}

int main(){
    ll a,b;
    cin >> a >> b;
    ll c=gcd(a,b);
    ll le=0,ri=INF;
    while(ri-le>1){
        ll mid=(ri+le)/2;
        if(c<mid*mid){
            ri=mid;
        }
        else{
            le=mid;
        }
    }
    if(c==le*le) cout << "Odd" << endl;
    else cout << "Even" << endl;
    return 0;
}