#include <bits/stdc++.h>
using namespace std;
 
int main()
{
	long long A, B;
	cin >> A >> B;
 
	long long gcd = __gcd( A, B );
	string ans = "Even";
	long double rt = sqrt( (long double)gcd );
	if( rt == floor( rt ) ) ans = "Odd";

	cout << ans << endl;
}