#include <bits/stdc++.h>
using namespace std;
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define rep(i,n) REP(i,0,n)
#define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it)
#define ALLOF(c) (c).begin(), (c).end()
typedef long long ll;
typedef unsigned long long ull;

ll gcd(ll a, ll b){return (b==0?a:gcd(b,a%b));}


int main(){
  ll A, B;
  cin >> A >> B;

  ll x = gcd(A, B);

  ll sx = sqrt(x);

  if(sx*sx == x) cout << "Odd" << endl;
  else cout << "Even" << endl;
  
  return 0;
}