#include <cmath>
#include <cstdint>
#include <cstdio>
using namespace std;
using i64 = int64_t;

bool is_square(i64 n) {
  i64 sq = static_cast<i64>(sqrt(n));
  return sq*sq == n;
}

i64 gcd(i64 a, i64 b) {
  if(b == 0) { return a; }
  return gcd(b, a%b);
}

int main(void) {
  i64 a, b; scanf("%ld%ld", &a, &b);
  i64 g = gcd(a, b);
  puts(is_square(g) ? "Odd" : "Even");
  return 0;
}