#include <bits/stdc++.h>
using namespace std;
long long gcd(long long a, long long b){
  if (b == 0){
    return a;
  } else {
    return gcd(b, a % b);
  }
}
int main(){
  long long A, B;
  cin >> A >> B;
  long long x = gcd(A, B);
  long long tv = 1000000000;
  long long fv = -1;
  while (tv - fv > 1){
    long long mid = (tv + fv) / 2;
    if (mid * mid >= x){
      tv = mid;
    } else {
      fv = mid;
    }
  }
  if (tv * tv == x){
    cout << "Odd" << endl;
  } else {
    cout << "Even" << endl;
  }
}