#include <bits/stdc++.h>
using namespace std;
template<typename T1,typename T2> inline void chmin(T1 &a,T2 b){if(a>b) a=b;}
template<typename T1,typename T2> inline void chmax(T1 &a,T2 b){if(a<b) a=b;}
using Int = long long;
const char newl = '\n';


template<typename T>
map<T, int> factorize(T x){
  map<T, int> res;
  for(int i=2;i*i<=x;i++){
    while(x%i==0){
      x/=i;
      res[i]++;
    }
  }
  if(x!=1) res[x]++;
  return res;
}

//INSERT ABOVE HERE
signed main(){
  cin.tie(0);
  ios::sync_with_stdio(0);

  int a,b;
  cin>>a>>b;
  int g=gcd(a,b);

  auto mp=factorize(g);
  int x=1;
  for(auto p:mp){
    x*=p.second+1;
    x%=2;
  }
  if(x) cout<<"Odd"<<endl;
  else cout<<"Even"<<endl;
  return 0;
}