#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)
#define FOR(i,b,e) for (int i=(int)(b); i<(int)(e); i++)
#define ALL(x) (x).begin(), (x).end()

const double PI = acos(-1);

long long gcd(long long a, long long b) {
  if (b == 0)
    return a;
  return gcd(b, a%b);    
}

// override function template of std::gcd
long long gcd(int a, int b) {
  return gcd((long long)a, (long long)b);
}

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  
  long long x, y;
  cin >> x >> y;
  long long g = gcd(x, y);

  long long sq = (long long)(sqrt(g) + 0.5);

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