#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i = 0; i < n; i++)
using ll = long long;
using graph = vector<vector<int>>;

const ll mod = 1000000007;
const int INF = 1001001001;

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

int main(){
    ll a, b; cin >> a >> b;
    ll tmp = gcd(a, b);
    for(ll i = 1; i*i <= tmp; i++){
        if(i * i == tmp){
            cout << "Odd" << endl;
            return 0;
        }
    }
    cout << "Even" << endl;
}