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

int main(){
  ll a, b; cin >> a >> b;
  ll x = gcd(a, b);
  ll n = floor(sqrt(x));
  bool flag = false;
  if(n*n==x) flag = true;
  if((n-1)*(n-1)==x) flag = true;
  if((n+1)*(n+1)==x) flag = true;
  if(flag) cout << "Odd" << endl;
  else cout << "Even" << endl;
  return 0;
}