#include <bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
  string a,b;
  cin>>a>>b;
  int n = a.size(), m = b.size();
  bool p = (a[n-1] == '1' && b[m-1] == '1');
  cout<<(p ? "Odd" : "Even")<<endl;
}