#include<iostream>
#include<algorithm>
#include<string>
#include<math.h>
#include<bitset>
#include <vector>
#include<bitset>
#include <iomanip>
#include <map>
#include <set>
#include <stack>
#include <deque>
#include <climits>
#include <queue>
using namespace std;


int main() {
	
	long long A, B;
	cin >> A >> B;
	long long G = __gcd(A, B);
	long long D = pow(G, 0.5);
	long long count = 0;
	for (long long i = 1; i <= D; i++) {
		if (i * i == G)count++;
	}
	if (count > 0)cout << "Odd";
	else cout << "Even";


	
}