#include <bits/stdc++.h>
#include<atcoder/all>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
using namespace atcoder;
#define all(a) a.begin(),a.end()
typedef long long ll;
typedef pair<ll,int> P;
typedef vector<ll> vi;
constexpr ll inf=1ll<<61;
constexpr ll mod=998244353;
typedef modint998244353 mi;

int main(){
    string a,b;cin>>a>>b;
    reverse(all(a));
    reverse(all(b));
    if(a[0]=='1'&&b[0]=='1')cout<<"Odd"<<endl;
    else cout<<"Even"<<endl;
}