#include <iostream>
#include <cstdio>
#include <cmath>
#include <ctime>
#include <cstdlib>
#include <cassert>
#include <vector>
#include <list>
#include <stack>
#include <queue>
#include <deque>
#include <map>
#include <set>
#include <bitset>
#include <string>
#include <algorithm>
#include <utility>
#define llint long long
#define inf 1e18
#define rep(x, s, t) for(llint (x) = (s); (x) < (t); (x)++)
#define Rep(x, s, t) for(llint (x) = (s); (x) <= (t); (x)++)
#define chmin(x, y) (x) = min((x), (y))
#define chmax(x, y) (x) = max((x), (y))

using namespace std;
typedef pair<llint, llint> P;

llint a, b;

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

int main(void)
{
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	cin >> a >> b;
	llint g = gcd(a, b);
	
	llint ub = 1e9+7, lb = 0, mid;
	while(ub-lb>1){
		mid = (ub+lb)/2;
		if(mid*mid <= g) lb = mid;
		else ub = mid;
	}
	if(lb*lb == g) cout << "Odd" << endl;
	else cout << "Even" << endl;
	
	return 0;
}