#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0;i<(int)(n);i++)
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;}
using ll = long long;

ll a,b;

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

bool issqrt(ll x){
  ll ok=0, ng=2e9+5;
  while(ng-ok>1){
    ll mid=(ok+ng)/2;
    (mid*mid<=x ? ok : ng)=mid;
  }
  return ok*ok==x;
}

int main () {
  cin.tie(0); ios::sync_with_stdio(false); 

  cin >> a >> b;
  cout << (issqrt(gcd(a,b)) ? "Odd" : "Even") << endl;
}