#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i,m,n) for(int i=m; i<n; ++i)
#define repl(i,m,n) for(ll i=m; i<n; ++i)
#define all(a) (a).begin(), (a).end()
#define rall(a) (a).rbegin(), (a).rend()

ll gcd(ll a, ll b){
    return a % b ? gcd(b, a % b) : b;
}

int main(){
    ll A, B;
    cin >> A >> B;

    ll g = gcd(A, B);
    ll ng = 0LL, ok = ll(1e9 + 100);
    while(abs(ok - ng) > 1LL){
        ll mid = (ok + ng)/2LL;
        if(mid * mid >= g) ok = mid;
        else ng = mid; 
    }

    if(ok*ok == g){
        cout << "Odd" << endl;
    }else{
        cout << "Even" << endl;
    }

    return 0;
}