#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define repr(i,n) for(int i = (int)(n); i >= 0; i--)
#define all(v) v.begin(),v.end()
typedef long long ll;

ll gcd(ll a, ll b){
    ll r,temp;
    if (a < b){
        temp = a;
        a = b;
        b = temp;
    }
    while ( (r = a % b) != 0){
        a = b;
        b = r;
    }
    return b;
}

int main(){
    ll A,B;
    cin >> A >> B;
    ll gcdab = gcd(A,B);
    ll left = 1;
    ll right = 1000000000;
    bool ans = true;
    while(true){
        if (right - left == 1){
            if (left * left != gcdab && right * right != gcdab){
                ans = false;
                break;
            }
            else{
                break;
            }
        }
        else{
            if (((left + right) / 2) * ((left + right) / 2) <= gcdab){
                left = (left + right) / 2;
            }
            else{
                right = (left + right) / 2;
            }
        }
    }
    if (ans) cout << "Odd" << endl;
    else cout << "Even" << endl;
}