#line 1 "template.hpp"
#include<bits/stdc++.h>
using ll = long long;
#define REP(i, n) for(ll i = 0; (i) < ll(n); ++ (i))
#define FOR(i, m, n) for(ll i = (m); (i) <= ll(n); ++ (i))
#define REPR(i, n) for(ll i = ll(n) - 1; (i) >= 0; -- (i))
#define FORR(i, m, n) for(ll i = ll(n); (i) >= ll(m); -- (i))
#define ALL(x) x.begin(),x.end()

#define INF (int)1e9
#define LLINF (long long)1e18
#define MOD (int)(1e9+7)
#define MOD9 (int)998244353
#define PI 3.141592653589
#define PB push_back
#define F first
#define S second

#define YESNO(T) if(T){cout<<"YES"<<endl;}else{cout<<"NO"<<endl;}
#define yesno(T) if(T){cout<<"yes"<<endl;}else{cout<<"no"<<endl;}
#define YesNo(T) if(T){cout<<"Yes"<<endl;}else{cout<<"No"<<endl;}
#define Yes(T) {cout<<"Yes"<<endl; if(T) return 0;}
#define No(T) {cout <<"No"<<endl; if(T) return 0;}
#define YES(T) {cout<<"YES"<<endl; if(T) return 0;}
#define NO(T) {cout <<"NO"<<endl; if(T) return 0;}

#define Graph vector<vector<int> >
#define CostGraph vector<vector<pair<int,ll> > >
#define PII pair<int,int>
#define PLL pair<ll,ll>
#define VI vector<int>
#define VL vector<ll>
#define VVI vector<vector<int> >
#define VVL vector<vector<ll> >
#define VPII vector<pair<int,int> >
#define VPLL vector<pair<ll,ll> >

#define DDD fixed<<setprecision(10)
#define PAD setfill('0')<<right<<setw(8)

template <class T>
inline bool chmin(T &a, T b) {
  if(a > b){ a = b; return true;}
  return false;
}
template <class T>
inline bool chmax(T &a, T b) {
  if(a < b){a = b; return true;}
  return false;
}
struct input{
  int n;
  input() {}
  input(int n_) : n(n_){};
  template <class T>
  operator T(){
    T ret;
    std::cin >> ret;
    return ret;
  }
  template <class T>
  operator std::vector<T>() {
    std::vector<T> ret(n);
    REP(i,n) std::cin >> ret[i];
    return ret;
  }
};
template <class T>
inline void printVec(std::vector<T> v){
  REP(i,v.size()){
    if(i) std::cout << " ";
    std::cout << v[i];
  } std::cout << std::endl;
}

using namespace std;
#line 1 "utils/modint.hpp"
template <int mod>
struct ModInt {
  int val;

  ModInt() : val(0) {}

  ModInt(int64_t value) : val(value >= 0 ? value % mod : (mod - (-value) % mod) % mod) {}

  ModInt &operator+=(const ModInt &p) {
    if ((val += p.val) >= mod) val -= mod;
    return *this;
  }

  ModInt &operator-=(const ModInt &p) {
    if ((val += mod - p.val) >= mod) val -= mod;
    return *this;
  }

  ModInt &operator*=(const ModInt &p) {
    val = (int)(1LL * val * p.val % mod);
    return *this;
  }

  ModInt &operator/=(const ModInt &p) {
    *this *= p.inverse();
    return *this;
  }

  ModInt operator-() const { return ModInt(-val); }

  ModInt operator+(const ModInt &p) const { return ModInt(*this) += p; }

  ModInt operator-(const ModInt &p) const { return ModInt(*this) -= p; }

  ModInt operator*(const ModInt &p) const { return ModInt(*this) *= p; }

  ModInt operator/(const ModInt &p) const { return ModInt(*this) /= p; }

  bool operator==(const ModInt &p) const { return val == p.val; }

  bool operator!=(const ModInt &p) const { return val != p.val; }

  ModInt inverse() const {
    int a = val, b = mod, u = 1, v = 0, t;
    while (b > 0) {
      t = a / b;
      swap(a -= t * b, b);
      swap(u -= t * v, v);
    }
    return ModInt(u);
  }

  template<typename T>
  ModInt pow(T n) const {
    ModInt ret(1), mul(val);
    while (n > 0) {
      if (n & 1) ret *= mul;
      mul *= mul;
      n >>= 1;
    }
    return ret;
  }

  friend ostream &operator<<(ostream &os, const ModInt &p) {
    return os << p.val;
  }

  friend istream &operator>>(istream &is, ModInt &a) {
    int64_t t;
    is >> t;
    a = ModInt<mod>(t);
    return (is);
  }

  static int get_mod() { return mod; }
};

using modint998244353 = ModInt<998244353>;
using modint1000000007 = ModInt<1000000007>;
#line 3 "main.cpp"
using mint = modint1000000007;
int main(){
  string s, t;
  cin >> s >> t;
  if(s[s.length() - 1] == '1' && t[t.length() - 1] == '1') cout << "Odd" << endl;
  else cout << "Even" << endl;
}