/*** author: yuji9511 ***/
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using lpair = pair<ll, ll>;
const ll MOD = 1e9+7;
const ll INF = 1e18;
#define rep(i,m,n) for(ll i=(m);i<(n);i++)
#define rrep(i,m,n) for(ll i=(m);i>=(n);i--)
#define printa(x,n) for(ll i=0;i<n;i++){cout<<(x[i])<<" \n"[i==n-1];};
void print() {}
template <class H,class... T>
void print(H&& h, T&&... t){cout<<h<<" \n"[sizeof...(t)==0];print(forward<T>(t)...);}
bool isSquare(ll x){
    ll lv = 0, rv = x+1;
    while(rv - lv > 1){
        ll mid = (lv + rv) / 2;
        if(mid * mid >= x){
            rv = mid;
        }else{
            lv = mid;
        }
    }
    if(rv * rv == x){
        return true;
    }else{
        return false;
    }
}

void solve(){
    ll A,B;
    cin >> A >> B;
    ll v = gcd(A,B);
    if(isSquare(v)){
        print("Odd");
    }else{
        print("Even");
    }

    

}

int main(){
    cin.tie(0);
    ios::sync_with_stdio(false);
    solve();
}