/**
 *   @FileName	a.cpp
 *   @Author	kanpurin
 *   @Created	2020.07.17 21:26:00
**/

#include "bits/stdc++.h" 
using namespace std; 
typedef long long ll;

//gcd
template<typename T>
T gcd(T a, T b) {
    return b ? gcd(b, a%b) : a;
}

int main() {
    ll a,b;
    cin >> a >> b;
    ll g = gcd(a, b);
    ll l = 0, r = 1000000001;
    while(r - l > 1) {
        ll mid = l + (r - l) / 2;
        if (mid * mid <= g) {
            l = mid;
        }
        else {
            r = mid;
        }
    }
    if (l * l == g) {
        cout << "Odd" << endl;
    }
    else {
        cout << "Even" << endl;
    }
    return 0;
}