#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ld long double
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define LOL cout<<'\n';
#define MOD 1000000007
#define sz(x) ((int)x.size())
#define INF LONG_LONG_MAX
#define NINF LONG_LONG_MIN

void solve(){
  int a,b; cin>>a>>b;
  int gcd=__gcd(a,b);
  int n=0;
  for(int i=1 ; i*i<=gcd ; i++){
    if(i==gcd/i) n++;
    else if(gcd%i==0) n+=2;
  }
  cout<<(n&1 ? "Odd" : "Even");LOL
}

signed main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0); cout.tie(0);
  solve();
  return 0;
}