/* -*- coding: utf-8 -*-
 *
 * 1113.cc:  No.1113 二つの整数 / Two Integers - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

/* typedef */

typedef long long ll;
typedef long double ld;

/* global variables */

/* subroutines */

template <typename T>
T gcd(T m, T n) {  // m > 0, n > 0
  if (m < n) swap(m, n);
  while (n > 0) {
    T r = m % n;
    m = n;
    n = r;
  }
  return m;
}

/* main */

int main() {
  ll a, b;
  scanf("%lld%lld", &a, &b);

  ll g = gcd<ll>(a, b);
  ll q = sqrtl((ld)g + 0.5);

  if (q * q == g) puts("Odd");
  else puts("Even");
  return 0;
}