#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';

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

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

  Int s=sqrtl(g);
  if(s*s==g) cout<<"Odd"<<endl;
  else cout<<"Even"<<endl;
  return 0;
}